1
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Field DH, White JS, Warriner SL, Wright MH. A fluorescent photoaffinity probe for formyl peptide receptor 1 labelling in living cells. RSC Chem Biol 2023; 4:216-222. [PMID: 36908701 PMCID: PMC9994102 DOI: 10.1039/d2cb00199c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Accepted: 01/10/2023] [Indexed: 01/15/2023] Open
Abstract
Fluorescent ligands for G-protein coupled receptors (GPCRs) are valuable tools for studying the expression, pharmacology and modulation of these therapeutically important proteins in living cells. Here we report a fluorescent photoaffinity probe for Formyl peptide receptor 1 (FPR1), a critical component of the innate immune response to bacterial infection and a promising target in inflammatory diseases. We demonstrate that the probe binds and covalently crosslinks to FPR1 with good specificity at nanomolar concentrations in living cells and is a useful tool for visualisation and characterisation of this receptor.
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Affiliation(s)
- Devon H Field
- Astbury Centre for Structural Molecular Biology, and the School of Chemistry, University of Leeds, Woodhouse Lane Leeds LS2 9JT UK
| | - Jack S White
- Astbury Centre for Structural Molecular Biology, and the School of Chemistry, University of Leeds, Woodhouse Lane Leeds LS2 9JT UK
| | - Stuart L Warriner
- Astbury Centre for Structural Molecular Biology, and the School of Chemistry, University of Leeds, Woodhouse Lane Leeds LS2 9JT UK
| | - Megan H Wright
- Astbury Centre for Structural Molecular Biology, and the School of Chemistry, University of Leeds, Woodhouse Lane Leeds LS2 9JT UK
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2
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Diecker J, Dörner W, Rüschenbaum J, Mootz HD. Unraveling Structural Information of Multi-Domain Nonribosomal Peptide Synthetases by Using Photo-Cross-Linking Analysis with Genetic Code Expansion. Methods Mol Biol 2023; 2670:165-185. [PMID: 37184704 DOI: 10.1007/978-1-0716-3214-7_8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Nonribosomal peptide synthetases (NRPSs) are large, multifunctional enzymes that facilitate the stepwise synthesis of modified peptides, many of which serve as important pharmaceutical products. Typically, NRPSs contain one module for the incorporation of one amino acid into the growing peptide chain. A module consists of the domains required for activation, covalent binding, condensation, termination, and optionally modification of the aminoacyl or peptidyl moiety. We here describe a protocol using genetically encoded photo-cross-linking amino acids to probe the 3D architecture of NRPSs by determining spatial proximity constraints. p-benzoyl-L-phenylalanine (BpF) is incorporated at positions of presumed contact interfaces between domains. The covalent cross-link products are visualized by SDS-PAGE-based methods and precisely mapped by tandem mass spectrometry. Originally intended to study the communication (COM) domains, a special pair of docking domains of unknown structure between two interacting subunits of one NRPS system, this cross-linking approach was also found to be useful to interrogate the spatial proximity of domains that are not connected on the level of the primary structure. The presented photo-cross-linking technique thus provides structural insights complementary to those obtained by protein crystallography and reports on the protein in solution.
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Affiliation(s)
- Julia Diecker
- University of Münster, Institute of Biochemistry, Münster, Germany
| | - Wolfgang Dörner
- University of Münster, Institute of Biochemistry, Münster, Germany
| | | | - Henning D Mootz
- University of Münster, Institute of Biochemistry, Münster, Germany.
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3
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West AV, Woo CM. Photoaffinity Labeling Chemistries Used to Map Biomolecular Interactions. Isr J Chem 2022. [DOI: 10.1002/ijch.202200081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Alexander V. West
- Department of Chemistry and Chemical Biology Harvard University 12 Oxford St Cambridge MA USA
| | - Christina M. Woo
- Department of Chemistry and Chemical Biology Harvard University 12 Oxford St Cambridge MA USA
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4
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Brüninghoff K, Wulff S, Dörner W, Geiss-Friedlander R, Mootz HD. A Photo-Crosslinking Approach to Identify Class II SUMO-1 Binders. Front Chem 2022; 10:900989. [PMID: 35707458 PMCID: PMC9191277 DOI: 10.3389/fchem.2022.900989] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Accepted: 04/25/2022] [Indexed: 11/13/2022] Open
Abstract
The small ubiquitin-like modifier (SUMO) is involved in various cellular processes and mediates known non-covalent protein-protein interactions by three distinct binding surfaces, whose interactions are termed class I to class III. While interactors for the class I interaction, which involves binding of a SUMO-interacting motif (SIM) to a hydrophobic groove in SUMO-1 and SUMO-2/3, are widely abundant, only a couple of examples have been reported for the other two types of interactions. Class II binding is conveyed by the E67 loop region on SUMO-1. Many previous studies to identify SUMO binders using pull-down or microarray approaches did not strategize on the SUMO binding mode. Identification of SUMO binding partners is further complicated due to the typically transient and low affinity interactions with the modifier. Here we aimed to identify SUMO-1 binders selectively enriched for class II binding. Using a genetically encoded photo-crosslinker approach, we have designed SUMO-1 probes to covalently capture class II SUMO-1 interactors by strategically positioning the photo-crosslinking moiety on the SUMO-1 surface. The probes were validated using known class II and class I binding partners. We utilized the probe with p-benzoyl-phenylalanine (BzF, also termed BpF or Bpa) at the position of Gln69 to identify binding proteins from mammalian cell extracts using mass spectrometry. By comparison with results obtained with a similarly designed SUMO-1 probe to target SIM-mediated binders of the class I type, we identified 192 and 96 proteins specifically enriched by either probe, respectively. The implicated preferential class I or class II binding modes of these proteins will further contribute to unveiling the complex interplay of SUMO-1-mediated interactions.
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Affiliation(s)
- Kira Brüninghoff
- Institute of Biochemistry, University of Münster, Münster, Germany
| | - Stephanie Wulff
- Institute of Biochemistry, University of Münster, Münster, Germany
| | - Wolfgang Dörner
- Institute of Biochemistry, University of Münster, Münster, Germany
| | - Ruth Geiss-Friedlander
- Institute of Molecular Medicine and Cell Research, University of Freiburg, Freiburg, Germany
| | - Henning D. Mootz
- Institute of Biochemistry, University of Münster, Münster, Germany
- *Correspondence: Henning D. Mootz,
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5
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Photoaffinity labeling and bioorthogonal ligation: Two critical tools for designing "Fish Hooks" to scout for target proteins. Bioorg Med Chem 2022; 62:116721. [PMID: 35358862 DOI: 10.1016/j.bmc.2022.116721] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Revised: 03/14/2022] [Accepted: 03/17/2022] [Indexed: 11/21/2022]
Abstract
Small molecules remain an important category of therapeutic agents. Their binding to different proteins can lead to both desired and undesired biological effects. Identification of the proteins that a drug binds to has become an important step in drug development because it can lead to safer and more effective drugs. Parent bioactive molecules can be converted to appropriate probes that allow for visualization and identification of their target proteins. Typically, these probes are designed and synthesized utilizing some or all of five major tools; a photoactivatable group, a reporter tag, a linker, an affinity tag, and a bioorthogonal handle. This review covers two of the most challenging tools, photoactivation and bioorthogonal ligation. We provide a historical and theoretical background along with synthetic routes to prepare them. In addition, the review provides comparative analyses of the available tools that can assist decision making when designing such probes. A survey of most recent literature reports is included as well to identify recent trends in the field.
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6
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Earley D, Guillou A, Klingler S, Fay R, Gut M, d’Orchymont F, Behmaneshfar S, Reichert L, Holland JP. Charting the Chemical and Mechanistic Scope of Light-Triggered Protein Ligation. JACS AU 2022; 2:646-664. [PMID: 35373206 PMCID: PMC8970001 DOI: 10.1021/jacsau.1c00530] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Indexed: 05/04/2023]
Abstract
The creation of discrete, covalent bonds between a protein and a functional molecule like a drug, fluorophore, or radiolabeled complex is essential for making state-of-the-art tools that find applications in basic science and clinical medicine. Photochemistry offers a unique set of reactive groups that hold potential for the synthesis of protein conjugates. Previous studies have demonstrated that photoactivatable desferrioxamine B (DFO) derivatives featuring a para-substituted aryl azide (ArN3) can be used to produce viable zirconium-89-radiolabeled monoclonal antibodies (89Zr-mAbs) for applications in noninvasive diagnostic positron emission tomography (PET) imaging of cancers. Here, we report on the synthesis, 89Zr-radiochemistry, and light-triggered photoradiosynthesis of 89Zr-labeled human serum albumin (HSA) using a series of 14 different photoactivatable DFO derivatives. The photoactive groups explore a range of substituted, and isomeric ArN3 reagents, as well as derivatives of benzophenone, a para-substituted trifluoromethyl phenyl diazirine, and a tetrazole species. For the compounds studied, efficient photochemical activation occurs inside the UVA-to-visible region of the electromagnetic spectrum (∼365-450 nm) and the photochemical reactions with HSA in water were complete within 15 min under ambient conditions. Under standardized experimental conditions, photoradiosynthesis with compounds 1-14 produced the corresponding 89ZrDFO-PEG3-HSA conjugates with decay-corrected isolated radiochemical yields between 18.1 ± 1.8% and 62.3 ± 3.6%. Extensive density functional theory (DFT) calculations were used to explore the reaction mechanisms and chemoselectivity of the light-induced bimolecular conjugation of compounds 1-14 to protein. The photoactivatable DFO-derivatives operate by at least five distinct mechanisms, each producing a different type of bioconjugate bond. Overall, the experimental and computational work presented here confirms that photochemistry is a viable option for making diverse, functionalized protein conjugates.
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7
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Fallon DJ, Lehmann S, Chung CW, Phillipou A, Eberl C, Fantom KGM, Zappacosta F, Patel VK, Bantscheff M, Schofield CJ, Tomkinson NCO, Bush JT. One-Step Synthesis of Photoaffinity Probes for Live-Cell MS-Based Proteomics. Chemistry 2021; 27:17880-17888. [PMID: 34328642 DOI: 10.1002/chem.202102036] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Indexed: 11/06/2022]
Abstract
We present a one-step Ugi reaction protocol for the expedient synthesis of photoaffinity probes for live-cell MS-based proteomics. The reaction couples an amine affinity function with commonly used photoreactive groups, and a variety of handle functionalities. Using this technology, a series of pan-BET (BET: bromodomain and extra-terminal domain) selective bromodomain photoaffinity probes were obtained by parallel synthesis. Studies on the effects of photoreactive group, linker length and irradiation wavelength on photocrosslinking efficiency provide valuable insights into photoaffinity probe design. Optimal probes were progressed to MS-based proteomics to capture the BET family of proteins from live cells and reveal their potential on- and off-target profiles.
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Affiliation(s)
- David J Fallon
- GlaxoSmithKline R&D, Gunnels Wood Road, Stevenage, SG1 2NY, UK
- Department of Pure and Applied Chemistry, Thomas Graham Building, University of Strathclyde, Glasgow, G1 1XL, UK
| | - Stephanie Lehmann
- Cellzome GmbH, a GSK company, Meyerhofstraße 1, Heidelberg, 69117, Germany
| | - Chun-Wa Chung
- GlaxoSmithKline R&D, Gunnels Wood Road, Stevenage, SG1 2NY, UK
| | - Alex Phillipou
- GlaxoSmithKline R&D, Gunnels Wood Road, Stevenage, SG1 2NY, UK
| | - Christian Eberl
- Cellzome GmbH, a GSK company, Meyerhofstraße 1, Heidelberg, 69117, Germany
| | - Ken G M Fantom
- GlaxoSmithKline R&D, Gunnels Wood Road, Stevenage, SG1 2NY, UK
| | | | | | - Marcus Bantscheff
- Cellzome GmbH, a GSK company, Meyerhofstraße 1, Heidelberg, 69117, Germany
| | | | - Nicholas C O Tomkinson
- Department of Pure and Applied Chemistry, Thomas Graham Building, University of Strathclyde, Glasgow, G1 1XL, UK
| | - Jacob T Bush
- GlaxoSmithKline R&D, Gunnels Wood Road, Stevenage, SG1 2NY, UK
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8
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McKenna SM, Fay EM, McGouran JF. Flipping the Switch: Innovations in Inducible Probes for Protein Profiling. ACS Chem Biol 2021; 16:2719-2730. [PMID: 34779621 PMCID: PMC8689647 DOI: 10.1021/acschembio.1c00572] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
![]()
Over the past two
decades, activity-based probes have enabled a
range of discoveries, including the characterization of new enzymes
and drug targets. However, their suitability in some labeling experiments
can be limited by nonspecific reactivity, poor membrane permeability,
or high toxicity. One method for overcoming these issues is through
the development of “inducible” activity-based probes.
These probes are added to samples in an unreactive state and require in situ transformation to their active form before labeling
can occur. In this Review, we discuss a variety of approaches to inducible
activity-based probe design, different means of probe activation,
and the advancements that have resulted from these applications. Additionally,
we highlight recent developments which may provide opportunities for
future inducible activity-based probe innovations.
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Affiliation(s)
- Sean M. McKenna
- School of Chemistry and Trinity Biomedical Sciences Institute, Trinity College Dublin, 152-160 Pearse St, Dublin 2, Ireland
- Synthesis and Solid State Pharmaceutical Centre (SSPC), Bernal Institute, Limerick V94 T9PX, Ireland
| | - Ellen M. Fay
- School of Chemistry and Trinity Biomedical Sciences Institute, Trinity College Dublin, 152-160 Pearse St, Dublin 2, Ireland
| | - Joanna F. McGouran
- School of Chemistry and Trinity Biomedical Sciences Institute, Trinity College Dublin, 152-160 Pearse St, Dublin 2, Ireland
- Synthesis and Solid State Pharmaceutical Centre (SSPC), Bernal Institute, Limerick V94 T9PX, Ireland
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9
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Walrant A, Sachon E. Photolabeling Strategies to Study Membranotropic Peptides Interacting with Lipids and Proteins in Membranes. Bioconjug Chem 2021; 32:1503-1514. [PMID: 34160213 DOI: 10.1021/acs.bioconjchem.1c00291] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Membranotropic peptides is a class of peptides that exert their biological action at the level of cell membranes. Understanding how they interact with their different membrane binding partners (lipids, proteins, and/or glycoconjugates) is important to decipher their mechanism of action. Affinity photolabeling is a powerful method to study noncovalent interactions and provide a submolecular picture of the contacts between two interacting partners. In this review, we give a panorama of photolabeling-based studies of the interactions between membranotropic peptides and membranes using either photoreactive lipids or peptides.
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Affiliation(s)
- Astrid Walrant
- Sorbonne Université, École Normale Supérieure, PSL University, CNRS, Laboratoire des Biomolécules, LBM, 75005, Paris, France
| | - Emmanuelle Sachon
- Sorbonne Université, École Normale Supérieure, PSL University, CNRS, Laboratoire des Biomolécules, LBM, 75005, Paris, France.,Sorbonne Université, Mass Spectrometry Sciences Sorbonne University, MS3U platform, UFR 926, UFR 927, 75005, Paris, France
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10
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Cichocki B, Khobragade V, Donzel M, Cotos L, Blandin S, Schaeffer-Reiss C, Cianférani S, Strub JM, Elhabiri M, Davioud-Charvet E. A Class of Valuable (Pro-)Activity-Based Protein Profiling Probes: Application to the Redox-Active Antiplasmodial Agent, Plasmodione. JACS AU 2021; 1:669-689. [PMID: 34056636 PMCID: PMC8154199 DOI: 10.1021/jacsau.1c00025] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Indexed: 05/03/2023]
Abstract
Plasmodione (PD) is a potent antimalarial redox-active drug acting at low nM range concentrations on different malaria parasite stages. In this study, in order to determine the precise PD protein interactome in parasites, we developed a class of (pro-)activity-based protein profiling probes (ABPP) as precursors of photoreactive benzophenone-like probes based on the skeleton of PD metabolites (PDO) generated in a cascade of redox reactions. Under UV-photoirradiation, we clearly demonstrate that benzylic oxidation of 3-benzylmenadione 11 produces the 3-benzoylmenadione probe 7, allowing investigation of the proof-of-concept of the ABPP strategy with 3-benzoylmenadiones 7-10. The synthesized 3-benzoylmenadiones, probe 7 with an alkyne group or probe 9 with -NO2 in para position of the benzoyl chain, were found to be the most efficient photoreactive and clickable probes. In the presence of various H-donor partners, the UV-irradiation of the photoreactive ABPP probes generates different adducts, the expected "benzophenone-like" adducts (pathway 1) in addition to "benzoxanthone" adducts (via two other pathways, 2 and 3). Using both human and Plasmodium falciparum glutathione reductases, three protein ligand binding sites were identified following photolabeling with probes 7 or 9. The photoreduction of 3-benzoylmenadiones (PDO and probe 9) promoting the formation of both the corresponding benzoxanthone and the derived enone could be replaced by the glutathione reductase-catalyzed reduction step. In particular, the electrophilic character of the benzoxanthone was evidenced by its ability to alkylate heme, as a relevant event supporting the antimalarial mode of action of PD. This work provides a proof-of-principle that (pro-)ABPP probes can generate benzophenone-like metabolites enabling optimized activity-based protein profiling conditions that will be instrumental to analyze the interactome of early lead antiplasmodial 3-benzylmenadiones displaying an original and innovative mode of action.
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Affiliation(s)
- Bogdan
Adam Cichocki
- Université
de Strasbourg−CNRS−UHA, UMR7042, Laboratoire d’Innovation Moléculaire
et Applications (LIMA), Team Bio(IN)organic and Medicinal Chemistry,
European School of Chemistry, Polymers and
Materials (ECPM), 25
Rue Becquerel, 67087 Strasbourg, France
| | - Vrushali Khobragade
- Université
de Strasbourg−CNRS−UHA, UMR7042, Laboratoire d’Innovation Moléculaire
et Applications (LIMA), Team Bio(IN)organic and Medicinal Chemistry,
European School of Chemistry, Polymers and
Materials (ECPM), 25
Rue Becquerel, 67087 Strasbourg, France
| | - Maxime Donzel
- Université
de Strasbourg−CNRS−UHA, UMR7042, Laboratoire d’Innovation Moléculaire
et Applications (LIMA), Team Bio(IN)organic and Medicinal Chemistry,
European School of Chemistry, Polymers and
Materials (ECPM), 25
Rue Becquerel, 67087 Strasbourg, France
| | - Leandro Cotos
- Université
de Strasbourg−CNRS−UHA, UMR7042, Laboratoire d’Innovation Moléculaire
et Applications (LIMA), Team Bio(IN)organic and Medicinal Chemistry,
European School of Chemistry, Polymers and
Materials (ECPM), 25
Rue Becquerel, 67087 Strasbourg, France
| | - Stephanie Blandin
- Université
de Strasbourg−CNRS−INSERM UPR9022/U1257, Mosquito Immune Responses (MIR), F-67000 Strasbourg, France
| | - Christine Schaeffer-Reiss
- Laboratoire
de Spectrométrie de Masse BioOrganique, Université Strasbourg, CNRS, IPHC UMR 7178, F-67000 Strasbourg, France
| | - Sarah Cianférani
- Laboratoire
de Spectrométrie de Masse BioOrganique, Université Strasbourg, CNRS, IPHC UMR 7178, F-67000 Strasbourg, France
| | - Jean-Marc Strub
- Laboratoire
de Spectrométrie de Masse BioOrganique, Université Strasbourg, CNRS, IPHC UMR 7178, F-67000 Strasbourg, France
| | - Mourad Elhabiri
- Université
de Strasbourg−CNRS−UHA, UMR7042, Laboratoire d’Innovation Moléculaire
et Applications (LIMA), Team Bio(IN)organic and Medicinal Chemistry,
European School of Chemistry, Polymers and
Materials (ECPM), 25
Rue Becquerel, 67087 Strasbourg, France
| | - Elisabeth Davioud-Charvet
- Université
de Strasbourg−CNRS−UHA, UMR7042, Laboratoire d’Innovation Moléculaire
et Applications (LIMA), Team Bio(IN)organic and Medicinal Chemistry,
European School of Chemistry, Polymers and
Materials (ECPM), 25
Rue Becquerel, 67087 Strasbourg, France
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11
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West AV, Muncipinto G, Wu HY, Huang AC, Labenski MT, Jones LH, Woo CM. Labeling Preferences of Diazirines with Protein Biomolecules. J Am Chem Soc 2021; 143:6691-6700. [PMID: 33876925 DOI: 10.1021/jacs.1c02509] [Citation(s) in RCA: 86] [Impact Index Per Article: 28.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Diazirines are widely used in photoaffinity labeling (PAL) to trap noncovalent interactions with biomolecules. However, design and interpretation of PAL experiments is challenging without a molecular understanding of the reactivity of diazirines with protein biomolecules. Herein, we report a systematic evaluation of the labeling preferences of alkyl and aryl diazirines with individual amino acids, single proteins, and in the whole cell proteome. We find that alkyl diazirines exhibit preferential labeling of acidic amino acids in a pH-dependent manner that is characteristic of a reactive alkyl diazo intermediate, while the aryl-fluorodiazirine labeling pattern reflects reaction primarily through a carbene intermediate. From a survey of 32 alkyl diazirine probes, we use this reactivity profile to rationalize why alkyl diazirine probes preferentially enrich highly acidic proteins or those embedded in membranes and why probes with a net positive charge tend to produce higher labeling yields in cells and in vitro. These results indicate that alkyl diazirines are an especially effective chemistry for surveying the membrane proteome and will facilitate design and interpretation of biomolecular labeling experiments with diazirines.
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Affiliation(s)
- Alexander V West
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
| | | | - Hung-Yi Wu
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Andrew C Huang
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
| | | | - Lyn H Jones
- Dana-Farber Cancer Institute, 360 Longwood Avenue, Boston, Massachusetts 02215, United States
| | - Christina M Woo
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, United States
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12
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Korovesis D, Beard HA, Mérillat C, Verhelst SHL. Probes for Photoaffinity Labelling of Kinases. Chembiochem 2021; 22:2206-2218. [PMID: 33544409 DOI: 10.1002/cbic.202000874] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2020] [Revised: 02/05/2021] [Indexed: 11/06/2022]
Abstract
Protein kinases, one of the largest enzyme superfamilies, regulate many physiological and pathological processes. They are drug targets for multiple human diseases, including various cancer types. Probes for the photoaffinity labelling of kinases are important research tools for the study of members of this enzyme superfamily. In this review, we discuss the design principles of these probes, which are mainly derived from inhibitors targeting the ATP pocket. Overall, insights from crystal structures guide the placement of photoreactive groups and detection tags. This has resulted in a wide variety of probes, of which we provide a comprehensive overview. We also discuss several areas of application of these probes, including the identification of targets and off-targets of kinase inhibitors, mapping of their binding sites, the development of inhibitor screening assays, the imaging of kinases, and identification of protein binding partners.
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Affiliation(s)
- Dimitris Korovesis
- Department of Cellular and Molecular Medicine, Laboratory of Chemical Biology KU Leuven, Herestraat 49 box 802, 3000, Leuven, Belgium
| | - Hester A Beard
- Department of Cellular and Molecular Medicine, Laboratory of Chemical Biology KU Leuven, Herestraat 49 box 802, 3000, Leuven, Belgium
| | - Christel Mérillat
- Department of Cellular and Molecular Medicine, Laboratory of Chemical Biology KU Leuven, Herestraat 49 box 802, 3000, Leuven, Belgium
| | - Steven H L Verhelst
- Department of Cellular and Molecular Medicine, Laboratory of Chemical Biology KU Leuven, Herestraat 49 box 802, 3000, Leuven, Belgium.,AG Chemical Proteomics, Leibniz Institute for Analytical Sciences ISAS, Otto-Hahn-Strasse 6b, 44227, Dortmund, Germany
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13
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Evaluation of an antibody-PNA conjugate as a clearing agent for antibody-based PNA-mediated radionuclide pretargeting. Sci Rep 2020; 10:20777. [PMID: 33247180 PMCID: PMC7695838 DOI: 10.1038/s41598-020-77523-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Accepted: 11/12/2020] [Indexed: 02/06/2023] Open
Abstract
Radionuclide molecular imaging of cancer-specific targets is a promising method to identify patients for targeted antibody therapy. Radiolabeled full-length antibodies however suffer from slow clearance, resulting in high background radiation. To overcome this problem, a pretargeting system based on complementary peptide nucleic acid (PNA) probes has been investigated. The pretargeting relies on sequential injections of primary, PNA-tagged antibody and secondary, radiolabeled PNA probe, which are separated in time, to allow for clearance of non-bound primary agent. We now suggest to include a clearing agent (CA), designed for removal of primary tumor-targeting agent from the blood. The CA is based on the antibody cetuximab, which was conjugated to PNA and lactosaminated by reductive amination to improve hepatic clearance. The CA was evaluated in combination with PNA-labelled trastuzumab, T-ZHP1, for radionuclide HER2 pretargeting. Biodistribution studies in normal mice demonstrated that the CA cleared ca. 7 times more rapidly from blood than unmodified cetuximab. Injection of the CA 6 h post injection of the radiolabeled primary agent [131I]I-T-ZHP1 gave a moderate reduction of the radioactivity concentration in the blood after 1 h from 8.5 ± 1.8 to 6.0 ± 0.4%ID/g. These proof-of-principle results could guide future development of a more efficient CA.
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14
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Brüninghoff K, Aust A, Taupitz KF, Wulff S, Dörner W, Mootz HD. Identification of SUMO Binding Proteins Enriched after Covalent Photo-Cross-Linking. ACS Chem Biol 2020; 15:2406-2414. [PMID: 32786267 DOI: 10.1021/acschembio.0c00609] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Post-translational modification with the small ubiquitin-like modifier (SUMO) affects thousands of proteins in the human proteome and is implicated in numerous cellular processes. The main outcome of SUMO conjugation is a rewiring of protein-protein interactions through recognition of the modifier's surface by SUMO binding proteins. The SUMO-interacting motif (SIM) mediates binding to a groove on SUMO; however, the low affinity of this interaction and the poor conservation of SIM sequences complicates the isolation and identification of SIM proteins. To address these challenges, we have designed and biochemically characterized monomeric and multimeric SUMO-2 probes with a genetically encoded photo-cross-linker positioned next to the SIM binding groove. Following photoinduced covalent capture, even weak SUMO binders are not washed away during the enrichment procedure, and very stringent washing conditions can be applied to remove nonspecifically binding proteins. A total of 329 proteins were isolated from nuclear HeLa cell extracts and identified using mass spectrometry. We found the molecular design of our probes was corroborated by the presence of many established SUMO interacting proteins and the high percentage (>90%) of hits containing a potential SIM sequence, as predicted by bioinformatic analyses. Notably, 266 of the 329 proteins have not been previously reported as SUMO binders using traditional noncovalent enrichment procedures. We confirmed SUMO binding with purified proteins and mapped the position of the covalent cross-links for selected cases. We postulate a new SIM in MRE11, involved in DNA repair. The identified SUMO binding candidates will help to reveal the complex SUMO-mediated protein network.
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15
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Dehling E, Rüschenbaum J, Diecker J, Dörner W, Mootz HD. Photo-crosslink analysis in nonribosomal peptide synthetases reveals aberrant gel migration of branched crosslink isomers and spatial proximity between non-neighboring domains. Chem Sci 2020; 11:8945-8954. [PMID: 34123148 PMCID: PMC8163358 DOI: 10.1039/d0sc01969k] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Nonribosomal peptide synthetases (NRPSs) are large, multi-modular enzyme templates for the biosynthesis of important peptide natural products. Modules are composed of a set of semi-autonomous domains that facilitate the individual reaction steps. Only little is known about the existence and relevance of a higher-order architecture in these mega-enzymes, for which contacts between non-neighboring domains in three-dimensional space would be characteristic. Similarly poorly understood is the structure of communication-mediating (COM) domains that facilitate NRPS subunit docking at the boundaries between epimerization and condensation domains. We investigated a COM domain pair in a minimal two module NRPS using genetically encoded photo-crosslinking moieties in the N-terminal acceptor COM domain. Crosslinks into the C-terminal donor COM domain of the partner module resulted in protein products with the expected migration behavior on SDS-PAGE gels corresponding to the added molecular weight of the proteins. Additionally, an unexpected apparent high-molecular weight crosslink product was revealed by mass spectrometric analysis to represent a T-form isomer with branched connectivity of the two polypeptide chains. Synthesis of the linear L-form and branched T-form isomers by click chemistry confirmed this designation. Our data revealed a surprising spatial proximity between the acceptor COM domain and the functionally unrelated small subdomain of the preceding adenylation domain. These findings provide an insight into three-dimensional domain arrangements in NRPSs in solution and suggest the described photo-crosslinking approach as a promising tool for the systematic investigation of their higher-order architecture. Photo-crosslink analysis reveals unexpected insights into the higher-order architecture of NRPS and the nature of crosslink isomers.![]()
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Affiliation(s)
- Eva Dehling
- Institute of Biochemistry, Department of Chemistry and Pharmacy, University of Muenster D-48149 Münster Germany
| | - Jennifer Rüschenbaum
- Institute of Biochemistry, Department of Chemistry and Pharmacy, University of Muenster D-48149 Münster Germany
| | - Julia Diecker
- Institute of Biochemistry, Department of Chemistry and Pharmacy, University of Muenster D-48149 Münster Germany
| | - Wolfgang Dörner
- Institute of Biochemistry, Department of Chemistry and Pharmacy, University of Muenster D-48149 Münster Germany
| | - Henning D Mootz
- Institute of Biochemistry, Department of Chemistry and Pharmacy, University of Muenster D-48149 Münster Germany
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16
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Hesp KD, Xiao J, West GM. Late-stage synthesis and application of photoreactive probes derived from direct benzoylation of heteroaromatic C–H bonds. Org Biomol Chem 2020; 18:3669-3673. [DOI: 10.1039/d0ob00336k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A synthetically-driven, late-stage C–H benzoylation strategy for the expedited preparation and evaluation of heterocyclic alternatives to more classical benzophenone photoreactive probes is reported.
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Affiliation(s)
| | - Jun Xiao
- Pfizer
- Inc
- Medicine Design
- Groton
- USA
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17
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Grant EK, Fallon DJ, Eberl HC, Fantom KGM, Zappacosta F, Messenger C, Tomkinson NCO, Bush JT. A Photoaffinity Displacement Assay and Probes to Study the Cyclin‐Dependent Kinase Family. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201906321] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Emma K. Grant
- GlaxoSmithKline Gunnels Wood Road Stevenage Hertfordshire SG1 2NY UK
- Department of Pure and Applied ChemistryUniversity of Strathclyde 295 Cathedral Street Glasgow G1 1XL UK
| | - David J. Fallon
- GlaxoSmithKline Gunnels Wood Road Stevenage Hertfordshire SG1 2NY UK
- Department of Pure and Applied ChemistryUniversity of Strathclyde 295 Cathedral Street Glasgow G1 1XL UK
| | | | - Ken G. M. Fantom
- GlaxoSmithKline Gunnels Wood Road Stevenage Hertfordshire SG1 2NY UK
| | | | - Cassie Messenger
- GlaxoSmithKline Gunnels Wood Road Stevenage Hertfordshire SG1 2NY UK
| | - Nicholas C. O. Tomkinson
- Department of Pure and Applied ChemistryUniversity of Strathclyde 295 Cathedral Street Glasgow G1 1XL UK
| | - Jacob T. Bush
- GlaxoSmithKline Gunnels Wood Road Stevenage Hertfordshire SG1 2NY UK
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18
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Grant EK, Fallon DJ, Eberl HC, Fantom KGM, Zappacosta F, Messenger C, Tomkinson NCO, Bush JT. A Photoaffinity Displacement Assay and Probes to Study the Cyclin‐Dependent Kinase Family. Angew Chem Int Ed Engl 2019; 58:17322-17327. [DOI: 10.1002/anie.201906321] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Revised: 08/09/2019] [Indexed: 12/16/2022]
Affiliation(s)
- Emma K. Grant
- GlaxoSmithKline Gunnels Wood Road Stevenage Hertfordshire SG1 2NY UK
- Department of Pure and Applied ChemistryUniversity of Strathclyde 295 Cathedral Street Glasgow G1 1XL UK
| | - David J. Fallon
- GlaxoSmithKline Gunnels Wood Road Stevenage Hertfordshire SG1 2NY UK
- Department of Pure and Applied ChemistryUniversity of Strathclyde 295 Cathedral Street Glasgow G1 1XL UK
| | | | - Ken G. M. Fantom
- GlaxoSmithKline Gunnels Wood Road Stevenage Hertfordshire SG1 2NY UK
| | | | - Cassie Messenger
- GlaxoSmithKline Gunnels Wood Road Stevenage Hertfordshire SG1 2NY UK
| | - Nicholas C. O. Tomkinson
- Department of Pure and Applied ChemistryUniversity of Strathclyde 295 Cathedral Street Glasgow G1 1XL UK
| | - Jacob T. Bush
- GlaxoSmithKline Gunnels Wood Road Stevenage Hertfordshire SG1 2NY UK
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19
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Jamshad M, Knowles TJ, White SA, Ward DG, Mohammed F, Rahman KF, Wynne M, Hughes GW, Kramer G, Bukau B, Huber D. The C-terminal tail of the bacterial translocation ATPase SecA modulates its activity. eLife 2019; 8:48385. [PMID: 31246174 PMCID: PMC6620043 DOI: 10.7554/elife.48385] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Accepted: 06/26/2019] [Indexed: 11/25/2022] Open
Abstract
In bacteria, the translocation of proteins across the cytoplasmic membrane by the Sec machinery requires the ATPase SecA. SecA binds ribosomes and recognises nascent substrate proteins, but the molecular mechanism of nascent substrate recognition is unknown. We investigated the role of the C-terminal tail (CTT) of SecA in nascent polypeptide recognition. The CTT consists of a flexible linker (FLD) and a small metal-binding domain (MBD). Phylogenetic analysis and ribosome binding experiments indicated that the MBD interacts with 70S ribosomes. Disruption of the MBD only or the entire CTT had opposing effects on ribosome binding, substrate-protein binding, ATPase activity and in vivo function, suggesting that the CTT influences the conformation of SecA. Site-specific crosslinking indicated that F399 in SecA contacts ribosomal protein uL29, and binding to nascent chains disrupts this interaction. Structural studies provided insight into the CTT-mediated conformational changes in SecA. Our results suggest a mechanism for nascent substrate protein recognition.
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Affiliation(s)
- Mohammed Jamshad
- Institute for Microbiology and Infection, School of Biosciences, University of Birmingham, Birmingham, United Kingdom
| | - Timothy J Knowles
- Institute for Microbiology and Infection, School of Biosciences, University of Birmingham, Birmingham, United Kingdom
| | - Scott A White
- Institute for Microbiology and Infection, School of Biosciences, University of Birmingham, Birmingham, United Kingdom
| | - Douglas G Ward
- Institute of Cancer and Genomic Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Fiyaz Mohammed
- Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, United Kingdom
| | - Kazi Fahmida Rahman
- Institute for Microbiology and Infection, School of Biosciences, University of Birmingham, Birmingham, United Kingdom
| | - Max Wynne
- Institute for Microbiology and Infection, School of Biosciences, University of Birmingham, Birmingham, United Kingdom
| | - Gareth W Hughes
- Institute for Microbiology and Infection, School of Biosciences, University of Birmingham, Birmingham, United Kingdom
| | - Günter Kramer
- Center for Molecular Biology of Heidelberg University (ZMBH), German Cancer Research Center (DKFZ), ZMBH-DKFZ Alliance, Heidelberg, Germany
| | - Bernd Bukau
- Center for Molecular Biology of Heidelberg University (ZMBH), German Cancer Research Center (DKFZ), ZMBH-DKFZ Alliance, Heidelberg, Germany
| | - Damon Huber
- Institute for Microbiology and Infection, School of Biosciences, University of Birmingham, Birmingham, United Kingdom
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20
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Miyazaki R, Akiyama Y, Mori H. A photo-cross-linking approach to monitor protein dynamics in living cells. Biochim Biophys Acta Gen Subj 2019; 1864:129317. [PMID: 30851405 DOI: 10.1016/j.bbagen.2019.03.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Revised: 02/26/2019] [Accepted: 03/04/2019] [Indexed: 11/16/2022]
Abstract
BACKGROUND Proteins, which comprise one of the major classes of biomolecules that constitute a cell, interact with other cellular factors during both their biogenesis and functional states. Studying not only static but also transient interactions of proteins is important to understand their physiological roles and regulation mechanisms. However, only a limited number of methods are available to analyze the dynamic behaviors of proteins at the molecular level in a living cell. The site-directed in vivo photo-cross-linking approach is an elegant technique to capture protein interactions with high spatial resolution in a living cell. SCOPE OF REVIEW Here, we review the in vivo photo-cross-linking approach including its recent applications and the potential problems to be considered. We also introduce a new in vivo photo-cross-linking-based technique (PiXie) to study protein dynamics with high spatiotemporal resolution. MAJOR CONCLUSIONS In vivo photo-cross-linking enables us to capture weak/transient protein interactions with high spatial resolution, and allows for identification of interacting factors. Moreover, the PiXie approach can be used to monitor rapid folding/assembly processes of proteins in living cells. GENERAL SIGNIFICANCE In vivo photo-cross-linking is a simple method that has been used to analyze the dynamic interactions of many cellular proteins. Originally developed in Escherichia coli, this system has been extended to studies in various organisms, making it a fundamental technique for investigating dynamic protein interactions in many cellular processes. This article is part of a Special issue entitled "Novel major techniques for visualizing 'live' protein molecules" edited by Dr. Daisuke Kohda.
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Affiliation(s)
- Ryoji Miyazaki
- Institute for Frontier Life and Medical Sciences, Kyoto University, Kawahara-cho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan
| | - Yoshinori Akiyama
- Institute for Frontier Life and Medical Sciences, Kyoto University, Kawahara-cho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan
| | - Hiroyuki Mori
- Institute for Frontier Life and Medical Sciences, Kyoto University, Kawahara-cho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan.
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21
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Vance N, Zacharias N, Ultsch M, Li G, Fourie A, Liu P, LaFrance-Vanasse J, Ernst JA, Sandoval W, Kozak KR, Phillips G, Wang W, Sadowsky J. Development, Optimization, and Structural Characterization of an Efficient Peptide-Based Photoaffinity Cross-Linking Reaction for Generation of Homogeneous Conjugates from Wild-Type Antibodies. Bioconjug Chem 2018; 30:148-160. [DOI: 10.1021/acs.bioconjchem.8b00809] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Nicholas Vance
- Research & Early Development, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Neelie Zacharias
- Research & Early Development, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Mark Ultsch
- Research & Early Development, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Guangmin Li
- Research & Early Development, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Aimee Fourie
- Research & Early Development, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Peter Liu
- Research & Early Development, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Julien LaFrance-Vanasse
- Research & Early Development, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - James A. Ernst
- Research & Early Development, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Wendy Sandoval
- Research & Early Development, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Katherine R. Kozak
- Research & Early Development, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Gail Phillips
- Research & Early Development, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Weiru Wang
- Research & Early Development, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Jack Sadowsky
- Research & Early Development, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
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22
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Chen Y, Topp EM. Photolytic Labeling and Its Applications in Protein Drug Discovery and Development. J Pharm Sci 2018; 108:791-797. [PMID: 30339867 DOI: 10.1016/j.xphs.2018.10.017] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Revised: 10/09/2018] [Accepted: 10/10/2018] [Indexed: 11/19/2022]
Abstract
In this mini-review, the major types of photolytic labeling reagents are presented together with their reaction mechanisms. The applications of photolytic labeling in protein drug discovery and development are then discussed; these have expanded from studies of protein-protein interactions in vivo to protein-matrix interactions in lyophilized solids. The mini-review concludes with recommendations for further development of the approach, which include the need for new and more chemically diverse photo-reactive reagents and better understanding of the mechanisms of photolytic labeling reactions in various media.
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Affiliation(s)
- Yuan Chen
- Department of Industrial and Physical Pharmacy, College of Pharmacy, Purdue University, West Lafayette, Indiana 47907
| | - Elizabeth M Topp
- Department of Industrial and Physical Pharmacy, College of Pharmacy, Purdue University, West Lafayette, Indiana 47907.
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23
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Epigenetic chromatin modification by amber suppression technology. Curr Opin Chem Biol 2018; 45:1-9. [DOI: 10.1016/j.cbpa.2018.01.017] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2017] [Revised: 01/11/2018] [Accepted: 01/28/2018] [Indexed: 01/10/2023]
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24
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Sangeetham SB, Huszár K, Bencsura P, Nyeste A, Hunyadi-Gulyás É, Fodor E, Welker E. Interrogating the Dimerization Interface of the Prion Protein Via Site-Specific Mutations to p-Benzoyl-L-Phenylalanine. J Mol Biol 2018; 430:2784-2801. [PMID: 29778603 DOI: 10.1016/j.jmb.2018.05.027] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2018] [Revised: 05/07/2018] [Accepted: 05/14/2018] [Indexed: 01/10/2023]
Abstract
Transmissible spongiform encephalopathies are centered on the conformational transition of the prion protein from a mainly helical, monomeric structure to a β-sheet rich ordered aggregate. Experiments indicate that the main infectious and toxic species in this process are however shorter oligomers, formation of which from the monomers is yet enigmatic. Here, we created 25 variants of the mouse prion protein site-specifically containing one genetically-incorporated para-benzoyl-phenylalanine (pBpa), a cross-linkable non-natural amino acid, in order to interrogate the interface of a prion protein-dimer, which might lie on the pathway of oligomerization. Our results reveal that the N-terminal part of the prion protein, especially regions around position 127 and 107, is integral part of the dimer interface. These together with additional pBpa-containing variants of mPrP might also facilitate to gain more structural insights into oligomeric and fibrillar prion protein species including the pathological variants.
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Affiliation(s)
- Sudheer Babu Sangeetham
- Institute of Biochemistry, Biological Research Centre, Hungarian Academy of Sciences, Szeged, Hungary
| | - Krisztina Huszár
- Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
| | - Petra Bencsura
- Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
| | - Antal Nyeste
- Institute of Biochemistry, Biological Research Centre, Hungarian Academy of Sciences, Szeged, Hungary; ProteoScientia Ltd., Cserhátszentiván, Hungary
| | - Éva Hunyadi-Gulyás
- Institute of Biochemistry, Biological Research Centre, Hungarian Academy of Sciences, Szeged, Hungary
| | - Elfrieda Fodor
- Institute of Biochemistry, Biological Research Centre, Hungarian Academy of Sciences, Szeged, Hungary
| | - Ervin Welker
- Institute of Biochemistry, Biological Research Centre, Hungarian Academy of Sciences, Szeged, Hungary; Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary.
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25
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Rosier BJHM, Cremers GAO, Engelen W, Merkx M, Brunsveld L, de Greef TFA. Incorporation of native antibodies and Fc-fusion proteins on DNA nanostructures via a modular conjugation strategy. Chem Commun (Camb) 2018; 53:7393-7396. [PMID: 28617516 PMCID: PMC5708335 DOI: 10.1039/c7cc04178k] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
A photocrosslinkable protein G adapter was used to site-specifically conjugate complex native proteins to oligonucleotides, allowing for efficient incorporation on DNA origami nanostructures.
A photocrosslinkable protein G variant was used as an adapter protein to covalently and site-specifically conjugate an antibody and an Fc-fusion protein to an oligonucleotide. This modular approach enables straightforward decoration of DNA nanostructures with complex native proteins while retaining their innate binding affinity, allowing precise control over the nanoscale spatial organization of such proteins for in vitro and in vivo biomedical applications.
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Affiliation(s)
- Bas J H M Rosier
- Laboratory of Chemical Biology and Institute for Complex Molecular Systems, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
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26
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Harrer N, Schindler CEM, Bruetzel LK, Forné I, Ludwigsen J, Imhof A, Zacharias M, Lipfert J, Mueller-Planitz F. Structural Architecture of the Nucleosome Remodeler ISWI Determined from Cross-Linking, Mass Spectrometry, SAXS, and Modeling. Structure 2018; 26:282-294.e6. [PMID: 29395785 DOI: 10.1016/j.str.2017.12.015] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Revised: 10/25/2017] [Accepted: 12/27/2017] [Indexed: 11/17/2022]
Abstract
Chromatin remodeling factors assume critical roles by regulating access to nucleosomal DNA. To determine the architecture of the Drosophila ISWI remodeling enzyme, we developed an integrative structural approach that combines protein cross-linking, mass spectrometry, small-angle X-ray scattering, and computational modeling. The resulting structural model shows the ATPase module in a resting state with both ATPase lobes twisted against each other, providing support for a conformation that was recently trapped by crystallography. The autoinhibiting NegC region does not protrude from the ATPase module as suggested previously. The regulatory NTR domain is located near both ATPase lobes. The full-length enzyme is flexible and can adopt a compact structure in solution with the C-terminal HSS domain packing against the ATPase module. Our data imply a series of conformational changes upon activation of the enzyme and illustrate how the NTR, NegC, and HSS domains contribute to regulation of the ATPase module.
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Affiliation(s)
- Nadine Harrer
- Molecular Biology, Biomedical Center, Faculty of Medicine, LMU Munich, 82152 Martinsried, Germany
| | - Christina E M Schindler
- Physics Department (T38), Technical University of Munich, 85748 Garching, Germany; Center for Integrated Protein Science Munich, 81377 Munich, Germany
| | - Linda K Bruetzel
- Department of Physics, Nanosystems Initiative Munich, and Center for Nanoscience, LMU Munich, 80799 Munich, Germany
| | - Ignasi Forné
- Molecular Biology, Biomedical Center, Faculty of Medicine, LMU Munich, 82152 Martinsried, Germany
| | - Johanna Ludwigsen
- Molecular Biology, Biomedical Center, Faculty of Medicine, LMU Munich, 82152 Martinsried, Germany
| | - Axel Imhof
- Molecular Biology, Biomedical Center, Faculty of Medicine, LMU Munich, 82152 Martinsried, Germany
| | - Martin Zacharias
- Physics Department (T38), Technical University of Munich, 85748 Garching, Germany; Center for Integrated Protein Science Munich, 81377 Munich, Germany
| | - Jan Lipfert
- Department of Physics, Nanosystems Initiative Munich, and Center for Nanoscience, LMU Munich, 80799 Munich, Germany.
| | - Felix Mueller-Planitz
- Molecular Biology, Biomedical Center, Faculty of Medicine, LMU Munich, 82152 Martinsried, Germany.
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27
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Piotrowski C, Sinz A. Structural Investigation of Proteins and Protein Complexes by Chemical Cross-Linking/Mass Spectrometry. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1105:101-121. [PMID: 30617826 DOI: 10.1007/978-981-13-2200-6_8] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
During the last two decades, cross-linking combined with mass spectrometry (MS) has evolved as a valuable tool to gain structural insights into proteins and protein assemblies. Structural information is obtained by introducing covalent connections between amino acids that are in spatial proximity in proteins and protein complexes. The distance constraints imposed by the cross-linking reagent provide information on the three-dimensional arrangement of the covalently connected amino acid residues and serve as basis for de-novo or homology modeling approaches. As cross-linking/MS allows investigating protein 3D-structures and protein-protein interactions not only in-vitro, but also in-vivo, it is especially appealing for studying protein systems in their native environment. In this chapter, we describe the principles of cross-linking/MS and illustrate its value for investigating protein 3D-structures and for unraveling protein interaction networks.
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Affiliation(s)
- Christine Piotrowski
- Department of Pharmaceutical Chemistry & Bioanalytics, Institute of Pharmacy, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany
| | - Andrea Sinz
- Department of Pharmaceutical Chemistry & Bioanalytics, Institute of Pharmacy, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany.
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28
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Lopez JE, Haynes SE, Majmudar JD, Martin BR, Fierke CA. HDAC8 Substrates Identified by Genetically Encoded Active Site Photocrosslinking. J Am Chem Soc 2017; 139:16222-16227. [PMID: 29035536 DOI: 10.1021/jacs.7b07603] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The histone deacetylase family comprises 18 enzymes that catalyze deacetylation of acetylated lysine residues; however, the specificity and substrate profile of each isozyme remains largely unknown. Due to transient enzyme-substrate interactions, conventional co-immunoprecipitation methods frequently fail to identify enzyme-specific substrates. Additionally, compensatory mechanisms often limit the ability of knockdown or chemical inhibition studies to achieve significant fold changes observed by acetylation proteomics methods. Furthermore, measured alterations do not guarantee a direct link between enzyme and substrate. Here we present a chemical crosslinking strategy that incorporates a photoreactive, non-natural amino acid, p-benzoyl-l-phenylalanine, into various positions of the structurally characterized isozyme histone deacetylase 8 (HDAC8). After covalent capture, co-immunoprecipitation, and mass spectrometric analysis, we identified a subset of HDAC8 substrates from human cell lysates, which were further validated for catalytic turnover. Overall, this chemical crosslinking approach identified novel HDAC8-specific substrates with high catalytic efficiency, thus presenting a general strategy for unbiased deacetylase substrate discovery.
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Affiliation(s)
- Jeffrey E Lopez
- Program in Chemical Biology, ‡Department of Chemistry, and §Department of Biological Chemistry, University of Michigan , 930 North University Avenue, Ann Arbor, Michigan 48109, United States
| | - Sarah E Haynes
- Program in Chemical Biology, ‡Department of Chemistry, and §Department of Biological Chemistry, University of Michigan , 930 North University Avenue, Ann Arbor, Michigan 48109, United States
| | - Jaimeen D Majmudar
- Program in Chemical Biology, ‡Department of Chemistry, and §Department of Biological Chemistry, University of Michigan , 930 North University Avenue, Ann Arbor, Michigan 48109, United States
| | - Brent R Martin
- Program in Chemical Biology, ‡Department of Chemistry, and §Department of Biological Chemistry, University of Michigan , 930 North University Avenue, Ann Arbor, Michigan 48109, United States
| | - Carol A Fierke
- Program in Chemical Biology, ‡Department of Chemistry, and §Department of Biological Chemistry, University of Michigan , 930 North University Avenue, Ann Arbor, Michigan 48109, United States
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29
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Yang L, Dolan EM, Tan SK, Lin T, Sontag ED, Khare SD. Computation‐Guided Design of a Stimulus‐Responsive Multienzyme Supramolecular Assembly. Chembiochem 2017; 18:2000-2006. [DOI: 10.1002/cbic.201700425] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Indexed: 12/14/2022]
Affiliation(s)
- Lu Yang
- Department of Chemistry and Chemical Biology Rutgers The State University of New Jersey Piscataway NJ 08854 USA
- Center for Integrative Proteomics Research Rutgers The State University of New Jersey Piscataway NJ 08854 USA
| | - Elliott M. Dolan
- Department of Chemistry and Chemical Biology Rutgers The State University of New Jersey Piscataway NJ 08854 USA
- Center for Integrative Proteomics Research Rutgers The State University of New Jersey Piscataway NJ 08854 USA
| | - Sophia K. Tan
- Center for Integrative Proteomics Research Rutgers The State University of New Jersey Piscataway NJ 08854 USA
| | - Tianyun Lin
- Center for Integrative Proteomics Research Rutgers The State University of New Jersey Piscataway NJ 08854 USA
| | - Eduardo D. Sontag
- Institute for Quantitative Biomedicine Rutgers The State University of New Jersey Piscataway NJ 08854 USA
- Center for Integrative Proteomics Research Rutgers The State University of New Jersey Piscataway NJ 08854 USA
- Department of Mathematics Rutgers The State University of New Jersey Piscataway NJ 08854 USA
| | - Sagar D. Khare
- Department of Chemistry and Chemical Biology Rutgers The State University of New Jersey Piscataway NJ 08854 USA
- Computational Biology & Molecular Biophysics Program Rutgers The State University of New Jersey Piscataway NJ 08854 USA
- Institute for Quantitative Biomedicine Rutgers The State University of New Jersey Piscataway NJ 08854 USA
- Center for Integrative Proteomics Research Rutgers The State University of New Jersey Piscataway NJ 08854 USA
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30
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Wright MH, Sieber SA. Chemical proteomics approaches for identifying the cellular targets of natural products. Nat Prod Rep 2017; 33:681-708. [PMID: 27098809 PMCID: PMC5063044 DOI: 10.1039/c6np00001k] [Citation(s) in RCA: 258] [Impact Index Per Article: 36.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
This review focuses on chemical probes to identify the protein binding partners of natural products in living systems.
Covering: 2010 up to 2016 Deconvoluting the mode of action of natural products and drugs remains one of the biggest challenges in chemistry and biology today. Chemical proteomics is a growing area of chemical biology that seeks to design small molecule probes to understand protein function. In the context of natural products, chemical proteomics can be used to identify the protein binding partners or targets of small molecules in live cells. Here, we highlight recent examples of chemical probes based on natural products and their application for target identification. The review focuses on probes that can be covalently linked to their target proteins (either via intrinsic chemical reactivity or via the introduction of photocrosslinkers), and can be applied “in situ” – in living systems rather than cell lysates. We also focus here on strategies that employ a click reaction, the copper-catalysed azide–alkyne cycloaddition reaction (CuAAC), to allow minimal functionalisation of natural product scaffolds with an alkyne or azide tag. We also discuss ‘competitive mode’ approaches that screen for natural products that compete with a well-characterised chemical probe for binding to a particular set of protein targets. Fuelled by advances in mass spectrometry instrumentation and bioinformatics, many modern strategies are now embracing quantitative proteomics to help define the true interacting partners of probes, and we highlight the opportunities this rapidly evolving technology provides in chemical proteomics. Finally, some of the limitations and challenges of chemical proteomics approaches are discussed.
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Affiliation(s)
- M H Wright
- Department of Chemistry, Technische Universität München, Lichtenbergstraße 4, 85748, Garching, Germany.
| | - S A Sieber
- Department of Chemistry, Technische Universität München, Lichtenbergstraße 4, 85748, Garching, Germany.
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31
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Belsom A, Mudd G, Giese S, Auer M, Rappsilber J. Complementary Benzophenone Cross-Linking/Mass Spectrometry Photochemistry. Anal Chem 2017; 89:5319-5324. [PMID: 28430416 PMCID: PMC5441754 DOI: 10.1021/acs.analchem.6b04938] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
![]()
Use
of a heterobifunctional photoactivatable cross-linker, sulfo-SDA
(diazirine), has yielded high-density data that facilitated structure
modeling of individual proteins. We expand the photoactivatable chemistry
toolbox here with a second reagent, sulfo-SBP (benzophenone). This
further increases the density of photo-cross-linking to a factor of
20× over conventional cross-linking. Importantly, the two different
photoactivatable groups display orthogonal directionality, enabling
access to different protein regions, unreachable with a single cross-linker.
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Affiliation(s)
- Adam Belsom
- Wellcome Trust Centre for Cell Biology, Institute of Cell Biology, School of Biological Sciences, University of Edinburgh , Edinburgh EH9 3BF, U.K
| | - Gemma Mudd
- School of Biological Sciences and Medical School, University of Edinburgh , Edinburgh EH9 3BF, U.K
| | - Sven Giese
- Chair of Bioanalytics, Institute of Biotechnology, Technische Universität Berlin , 13355 Berlin, Germany
| | - Manfred Auer
- School of Biological Sciences and Medical School, University of Edinburgh , Edinburgh EH9 3BF, U.K
| | - Juri Rappsilber
- Wellcome Trust Centre for Cell Biology, Institute of Cell Biology, School of Biological Sciences, University of Edinburgh , Edinburgh EH9 3BF, U.K.,Chair of Bioanalytics, Institute of Biotechnology, Technische Universität Berlin , 13355 Berlin, Germany
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32
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Koole C, Reynolds CA, Mobarec JC, Hick C, Sexton PM, Sakmar TP. Genetically encoded photocross-linkers determine the biological binding site of exendin-4 peptide in the N-terminal domain of the intact human glucagon-like peptide-1 receptor (GLP-1R). J Biol Chem 2017; 292:7131-7144. [PMID: 28283573 PMCID: PMC5409479 DOI: 10.1074/jbc.m117.779496] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2017] [Revised: 03/09/2017] [Indexed: 12/25/2022] Open
Abstract
The glucagon-like peptide-1 receptor (GLP-1R) is a key therapeutic target in the management of type II diabetes mellitus, with actions including regulation of insulin biosynthesis and secretion, promotion of satiety, and preservation of β-cell mass. Like most class B G protein-coupled receptors (GPCRs), there is limited knowledge linking biological activity of the GLP-1R with the molecular structure of an intact, full-length, and functional receptor·ligand complex. In this study, we have utilized genetic code expansion to site-specifically incorporate the photoactive amino acid p-azido-l-phenylalanine (azF) into N-terminal residues of a full-length functional human GLP-1R in mammalian cells. UV-mediated photolysis of azF was then carried out to induce targeted photocross-linking to determine the proximity of the azido group in the mutant receptor with the peptide exendin-4. Cross-linking data were compared directly with the crystal structure of the isolated N-terminal extracellular domain of the GLP-1R in complex with exendin(9-39), revealing both similarities as well as distinct differences in the mode of interaction. Generation of a molecular model to accommodate the photocross-linking constraints highlights the potential influence of environmental conditions on the conformation of the receptor·peptide complex, including folding dynamics of the peptide and formation of dimeric and higher order oligomeric receptor multimers. These data demonstrate that crystal structures of isolated receptor regions may not give a complete reflection of peptide/receptor interactions and should be combined with additional experimental constraints to reveal peptide/receptor interactions occurring in the dynamic, native, and full-length receptor state.
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Affiliation(s)
- Cassandra Koole
- From the Laboratory of Chemical Biology and Signal Transduction, The Rockefeller University, New York, New York 10065
| | - Christopher A Reynolds
- the School of Biological Sciences, University of Essex, Wivenhoe Park, Colchester CO4 3SQ, United Kingdom
| | - Juan C Mobarec
- the School of Biological Sciences, University of Essex, Wivenhoe Park, Colchester CO4 3SQ, United Kingdom
| | - Caroline Hick
- Drug Discovery Biology, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria 3052, Australia, and
| | - Patrick M Sexton
- Drug Discovery Biology, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, Victoria 3052, Australia, and
| | - Thomas P Sakmar
- From the Laboratory of Chemical Biology and Signal Transduction, The Rockefeller University, New York, New York 10065,
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33
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Ludwigsen J, Pfennig S, Singh AK, Schindler C, Harrer N, Forné I, Zacharias M, Mueller-Planitz F. Concerted regulation of ISWI by an autoinhibitory domain and the H4 N-terminal tail. eLife 2017; 6. [PMID: 28109157 PMCID: PMC5305211 DOI: 10.7554/elife.21477] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2016] [Accepted: 01/20/2017] [Indexed: 01/08/2023] Open
Abstract
ISWI-family nucleosome remodeling enzymes need the histone H4 N-terminal tail to mobilize nucleosomes. Here we mapped the H4-tail binding pocket of ISWI. Surprisingly the binding site was adjacent to but not overlapping with the docking site of an auto-regulatory motif, AutoN, in the N-terminal region (NTR) of ISWI, indicating that AutoN does not act as a simple pseudosubstrate as suggested previously. Rather, AutoN cooperated with a hitherto uncharacterized motif, termed AcidicN, to confer H4-tail sensitivity and discriminate between DNA and nucleosomes. A third motif in the NTR, ppHSA, was functionally required in vivo and provided structural stability by clamping the NTR to Lobe 2 of the ATPase domain. This configuration is reminiscent of Chd1 even though Chd1 contains an unrelated NTR. Our results shed light on the intricate structural and functional regulation of ISWI by the NTR and uncover surprising parallels with Chd1. DOI:http://dx.doi.org/10.7554/eLife.21477.001 In the cells of animals, plants and other eukaryotes, DNA wraps tightly around proteins called histones to form structures known as nucleosomes that resemble beads on a string. When nucleosomes are sufficiently close to each other they interact and clump together, which compacts the DNA and prevents the genes in that stretch of DNA being activated. But how do cells mobilize their nucleosomes? A nucleosome remodeling enzyme called ISWI can slide nucleosomes along DNA. ISWI becomes active when it interacts with a ‘tail’ region of a histone protein called H4. However, the H4 tail prefers to interact with neighboring nucleosomes instead of with ISWI. Therefore when ISWI slides a nucleosome close to another one, the H4 tail of the nucleosome binds instead to its new neighbor so that ISWI cannot continue to slide. By this mechanism, ISWI is proposed to pile up nucleosomes, which subsequently compact, leading to the inactivation of this part of the genome. To investigate how ISWI recognizes the H4 tail, Ludwigsen et al. mapped where the H4 tail binds to ISWI by combining the biochemical methods of cross-linking and mass spectrometry. In addition, mutagenesis experiments identified a new motif in the enzyme that is essential for recognizing the H4 tail. In the absence of the nucleosome, this motif – called AcidicN – works with a neighboring motif called AutoN to keep ISWI in an inactive state. The two motifs also work together to enable ISWI to distinguish between nucleosomes and DNA. Further evidence suggests that other remodeling enzymes have similar regulation mechanisms; therefore this method of controlling nucleosome remodeling may have been conserved throughout evolution. Further studies are now needed to detect the shape changes that occur in ISWI as it recognizes the histone tail and work out how this leads to nucleosome remodeling. Inside cells, ISWI is usually found within large complexes that consist of many proteins. It therefore also remains to be discovered whether the proteins in these complexes impose additional layers of regulation and complexity on the activity of ISWI. DOI:http://dx.doi.org/10.7554/eLife.21477.002
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Affiliation(s)
- Johanna Ludwigsen
- Biomedical Center, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Sabrina Pfennig
- Biomedical Center, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Ashish K Singh
- Biomedical Center, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Christina Schindler
- Physics Department (T38), Technische Universität München, Munich, Germany.,Center for Integrated Protein Science Munich, Munich, Germany
| | - Nadine Harrer
- Biomedical Center, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Ignasi Forné
- Biomedical Center, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Martin Zacharias
- Physics Department (T38), Technische Universität München, Munich, Germany.,Center for Integrated Protein Science Munich, Munich, Germany
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34
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Dormán G, Nakamura H, Pulsipher A, Prestwich GD. The Life of Pi Star: Exploring the Exciting and Forbidden Worlds of the Benzophenone Photophore. Chem Rev 2016; 116:15284-15398. [PMID: 27983805 DOI: 10.1021/acs.chemrev.6b00342] [Citation(s) in RCA: 125] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The widespread applications of benzophenone (BP) photochemistry in biological chemistry, bioorganic chemistry, and material science have been prominent in both academic and industrial research. BP photophores have unique photochemical properties: upon n-π* excitation at 365 nm, a biradicaloid triplet state is formed reversibly, which can abstract a hydrogen atom from accessible C-H bonds; the radicals subsequently recombine, creating a stable covalent C-C bond. This light-directed covalent attachment process is exploited in many different ways: (i) binding/contact site mapping of ligand (or protein)-protein interactions; (ii) identification of molecular targets and interactome mapping; (iii) proteome profiling; (iv) bioconjugation and site-directed modification of biopolymers; (v) surface grafting and immobilization. BP photochemistry also has many practical advantages, including low reactivity toward water, stability in ambient light, and the convenient excitation at 365 nm. In addition, several BP-containing building blocks and reagents are commercially available. In this review, we explore the "forbidden" (transitions) and excitation-activated world of photoinduced covalent attachment of BP photophores by touring a colorful palette of recent examples. In this exploration, we will see the pros and cons of using BP photophores, and we hope that both novice and expert photolabelers will enjoy and be inspired by the breadth and depth of possibilities.
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Affiliation(s)
- György Dormán
- Targetex llc , Dunakeszi H-2120, Hungary.,Faculty of Pharmacy, University of Szeged , Szeged H-6720, Hungary
| | - Hiroyuki Nakamura
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology , Yokohama 226-8503, Japan
| | - Abigail Pulsipher
- GlycoMira Therapeutics, Inc. , Salt Lake City, Utah 84108, United States.,Division of Head and Neck Surgery, Rhinology - Sinus and Skull Base Surgery, Department of Surgery, University of Utah School of Medicine , Salt Lake City, Utah 84108, United States
| | - Glenn D Prestwich
- Division of Head and Neck Surgery, Rhinology - Sinus and Skull Base Surgery, Department of Surgery, University of Utah School of Medicine , Salt Lake City, Utah 84108, United States
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35
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Zuhl AM, Nolan CE, Brodney MA, Niessen S, Atchison K, Houle C, Karanian DA, Ambroise C, Brulet JW, Beck EM, Doran SD, O'Neill BT, Am Ende CW, Chang C, Geoghegan KF, West GM, Judkins JC, Hou X, Riddell DR, Johnson DS. Chemoproteomic profiling reveals that cathepsin D off-target activity drives ocular toxicity of β-secretase inhibitors. Nat Commun 2016; 7:13042. [PMID: 27727204 PMCID: PMC5062570 DOI: 10.1038/ncomms13042] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2016] [Accepted: 08/26/2016] [Indexed: 01/18/2023] Open
Abstract
Inhibition of β-secretase BACE1 is considered one of the most promising approaches for treating Alzheimer's disease. Several structurally distinct BACE1 inhibitors have been withdrawn from development after inducing ocular toxicity in animal models, but the target mediating this toxicity has not been identified. Here we use a clickable photoaffinity probe to identify cathepsin D (CatD) as a principal off-target of BACE1 inhibitors in human cells. We find that several BACE1 inhibitors blocked CatD activity in cells with much greater potency than that displayed in cell-free assays with purified protein. Through a series of exploratory toxicology studies, we show that quantifying CatD target engagement in cells with the probe is predictive of ocular toxicity in vivo. Taken together, our findings designate off-target inhibition of CatD as a principal driver of ocular toxicity for BACE1 inhibitors and more generally underscore the power of chemical proteomics for discerning mechanisms of drug action. Several β-secretase (BACE) inhibitors exhibit unexplained ocular toxicity in preclinical studies. Here the authors generate a clickable photoaffinity probe to interrogate off-targets in cells and animals, and identify inhibition of cathepsin D as a driver of ocular toxicity.
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Affiliation(s)
- Andrea M Zuhl
- Pfizer Worldwide Research and Development, Cambridge, Massachusetts 02139, USA.,Worldwide Medicinal Chemistry
| | - Charles E Nolan
- Pfizer Worldwide Research and Development, Cambridge, Massachusetts 02139, USA.,Neuroscience Research Unit
| | - Michael A Brodney
- Pfizer Worldwide Research and Development, Cambridge, Massachusetts 02139, USA.,Worldwide Medicinal Chemistry
| | - Sherry Niessen
- Worldwide Medicinal Chemistry.,Pfizer Worldwide Research and Development, San Diego, California 92121, USA
| | - Kevin Atchison
- Pfizer Worldwide Research and Development, Cambridge, Massachusetts 02139, USA.,Neuroscience Research Unit
| | - Christopher Houle
- Pfizer Worldwide Research and Development, Groton, Connecticut 06340, USA.,Drug Safety Research and Development
| | - David A Karanian
- Pfizer Worldwide Research and Development, Groton, Connecticut 06340, USA.,Drug Safety Research and Development
| | - Claude Ambroise
- Pfizer Worldwide Research and Development, Cambridge, Massachusetts 02139, USA.,Neuroscience Research Unit
| | - Jeffrey W Brulet
- Pfizer Worldwide Research and Development, Cambridge, Massachusetts 02139, USA.,Worldwide Medicinal Chemistry
| | - Elizabeth M Beck
- Pfizer Worldwide Research and Development, Cambridge, Massachusetts 02139, USA.,Worldwide Medicinal Chemistry
| | - Shawn D Doran
- Pfizer Worldwide Research and Development, Groton, Connecticut 06340, USA.,Pharmacokinetics, Dynamics and Metabolism
| | - Brian T O'Neill
- Worldwide Medicinal Chemistry.,Pfizer Worldwide Research and Development, Groton, Connecticut 06340, USA
| | - Christopher W Am Ende
- Worldwide Medicinal Chemistry.,Pfizer Worldwide Research and Development, Groton, Connecticut 06340, USA
| | - Cheng Chang
- Pfizer Worldwide Research and Development, Groton, Connecticut 06340, USA.,Pharmacokinetics, Dynamics and Metabolism
| | - Kieran F Geoghegan
- Worldwide Medicinal Chemistry.,Pfizer Worldwide Research and Development, Groton, Connecticut 06340, USA.,Structural Biology and Biophysics Group
| | - Graham M West
- Worldwide Medicinal Chemistry.,Pfizer Worldwide Research and Development, Groton, Connecticut 06340, USA.,Structural Biology and Biophysics Group
| | - Joshua C Judkins
- Pfizer Worldwide Research and Development, Cambridge, Massachusetts 02139, USA.,Worldwide Medicinal Chemistry
| | - Xinjun Hou
- Pfizer Worldwide Research and Development, Cambridge, Massachusetts 02139, USA.,Worldwide Medicinal Chemistry
| | - David R Riddell
- Pfizer Worldwide Research and Development, Cambridge, Massachusetts 02139, USA.,Neuroscience Research Unit
| | - Douglas S Johnson
- Pfizer Worldwide Research and Development, Cambridge, Massachusetts 02139, USA.,Worldwide Medicinal Chemistry
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36
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Crump CJ, Murrey HE, Ballard TE, am Ende CW, Wu X, Gertsik N, Johnson DS, Li YM. Development of Sulfonamide Photoaffinity Inhibitors for Probing Cellular γ-Secretase. ACS Chem Neurosci 2016; 7:1166-73. [PMID: 27253220 DOI: 10.1021/acschemneuro.6b00127] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
γ-Secretase is a multiprotein complex that catalyzes intramembrane proteolysis associated with Alzheimer's disease and cancer. Here, we have developed potent sulfonamide clickable photoaffinity probes that target γ-secretase in vitro and in cells by incorporating various photoreactive groups and walking the clickable alkyne handle to different positions around the molecule. We found that benzophenone is preferred over diazirine as a photoreactive group within the sulfonamide scaffold for labeling γ-secretase. Intriguingly, the placement of the alkyne at different positions has little effect on probe potency but has a significant impact on the efficiency of labeling of γ-secretase. Moreover, the optimized clickable photoprobe, 163-BP3, was utilized as a cellular probe to effectively assess the target engagement of inhibitors with γ-secretase in primary neuronal cells. In addition, biotinylated 163-BP3 probes were developed and used to capture the native γ-secretase complex in the 3-[(3-cholamidopropyl)dimethylammonio]-2-hydroxy-1-propanesulfonate (CHAPSO) solubilized state. Taken together, these next generation clickable and biotinylated sulfonamide probes offer new tools to study γ-secretase in biochemical and cellular systems. Finally, the data provide insights into structural features of the sulfonamide inhibitor binding site in relation to the active site and into the design of clickable photoaffinity probes.
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Affiliation(s)
- Christina J. Crump
- Chemical
Biology Program, Memorial Sloan Kettering Cancer Center, 1275 York
Avenue, New York, New York 10065, United States
| | - Heather E. Murrey
- Pfizer Worldwide Research and Development, Worldwide Medicinal Chemistry, Cambridge, Massachusetts 02139, United States
| | - T. Eric Ballard
- Pfizer Worldwide Research and Development, Worldwide
Medicinal Chemistry Groton, Connecticut 06340, United States
| | - Christopher W. am Ende
- Pfizer Worldwide Research and Development, Worldwide
Medicinal Chemistry Groton, Connecticut 06340, United States
| | - Xianzhong Wu
- Chemical
Biology Program, Memorial Sloan Kettering Cancer Center, 1275 York
Avenue, New York, New York 10065, United States
| | - Natalya Gertsik
- Chemical
Biology Program, Memorial Sloan Kettering Cancer Center, 1275 York
Avenue, New York, New York 10065, United States
| | - Douglas S. Johnson
- Pfizer Worldwide Research and Development, Worldwide Medicinal Chemistry, Cambridge, Massachusetts 02139, United States
| | - Yue-Ming Li
- Chemical
Biology Program, Memorial Sloan Kettering Cancer Center, 1275 York
Avenue, New York, New York 10065, United States
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37
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Kanje S, von Witting E, Chiang SCC, Bryceson YT, Hober S. Site-Specific Photolabeling of the IgG Fab Fragment Using a Small Protein G Derived Domain. Bioconjug Chem 2016; 27:2095-102. [PMID: 27491005 DOI: 10.1021/acs.bioconjchem.6b00346] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Antibodies are widely used reagents for recognition in both clinic and research laboratories all over the world. For many applications, antibodies are labeled through conjugation to different reporter molecules or therapeutic agents. Traditionally, antibodies are covalently conjugated to reporter molecules via primary amines on lysines or thiols on cysteines. While efficient, such labeling is variable and nonstoichiometric and may affect an antibody's binding to its target. Moreover, an emerging field for therapeutics is antibody-drug conjugates, where a toxin or drug is conjugated to an antibody in order to increase or incorporate a therapeutic effect. It has been shown that homogeneity and controlled conjugation are crucial in these therapeutic applications. Here we present two novel protein domains developed from an IgG-binding domain of Streptococcal Protein G. These domains show obligate Fab binding and can be used for site-specific and covalent attachment exclusively to the constant part of the Fab fragment of an antibody. The two different domains can covalently label IgG of mouse and human descent. The labeled antibodies were shown to be functional in both an ELISA and in an NK-cell antibody-dependent cellular cytotoxicity assay. These engineered protein domains provide novel tools for controlled labeling of Fab fragments and full-length IgG.
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Affiliation(s)
- Sara Kanje
- Department of Protein Technology, KTH - Royal Institute of Technology , SE-10691, Stockholm, Sweden
| | - Emma von Witting
- Department of Protein Technology, KTH - Royal Institute of Technology , SE-10691, Stockholm, Sweden
| | - Samuel C C Chiang
- HERM, Department of Medicine Huddinge, Karolinska Institute , SE-14157, Stockholm, Sweden
| | - Yenan T Bryceson
- HERM, Department of Medicine Huddinge, Karolinska Institute , SE-14157, Stockholm, Sweden
| | - Sophia Hober
- Department of Protein Technology, KTH - Royal Institute of Technology , SE-10691, Stockholm, Sweden
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38
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Lancia JK, Nwokoye A, Dugan A, Joiner C, Pricer R, Mapp AK. Sequence context and crosslinking mechanism affect the efficiency of in vivo capture of a protein-protein interaction. Biopolymers 2016; 101:391-7. [PMID: 24037947 DOI: 10.1002/bip.22395] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2013] [Accepted: 07/22/2013] [Indexed: 12/18/2022]
Abstract
Protein-protein interactions (PPIs) are essential for implementing cellular processes and thus methods for the discovery and study of PPIs are highly desirable. An emerging method for capturing PPIs in their native cellular environment is in vivo covalent chemical capture, a method that uses nonsense suppression to site specifically incorporate photoactivable unnatural amino acids (UAAs) in living cells. However, in one study we found that this method did not capture a PPI for which there was abundant functional evidence, a complex formed between the transcriptional activator Gal4 and its repressor protein Gal80. Here we describe the factors that influence the success of covalent chemical capture and show that the innate reactivity of the two UAAs utilized, (p-benzoylphenylalanine (pBpa) and p-azidophenylalanine (pAzpa)), plays a profound role in the capture of Gal80 by Gal4. Based upon these data, guidelines are outlined for the successful use of in vivo photo-crosslinking to capture novel PPIs and to characterize the interfaces.
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Affiliation(s)
- Jody K Lancia
- Program in Chemical Biology, University of Michigan, Ann Arbor, MI, 48109
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39
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Schwarz R, Tänzler D, Ihling CH, Sinz A. Monitoring Solution Structures of Peroxisome Proliferator-Activated Receptor β/δ upon Ligand Binding. PLoS One 2016; 11:e0151412. [PMID: 26992147 PMCID: PMC4798536 DOI: 10.1371/journal.pone.0151412] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Accepted: 02/26/2016] [Indexed: 01/21/2023] Open
Abstract
Peroxisome proliferator-activated receptors (PPARs) have been intensively studied as drug targets to treat type 2 diabetes, lipid disorders, and metabolic syndrome. This study is part of our ongoing efforts to map conformational changes in PPARs in solution by a combination of chemical cross-linking and mass spectrometry (MS). To our best knowledge, we performed the first studies addressing solution structures of full-length PPAR-β/δ. We monitored the conformations of the ligand-binding domain (LBD) as well as full-length PPAR-β/δ upon binding of two agonists. (Photo-) cross-linking relied on (i) a variety of externally introduced amine- and carboxyl-reactive linkers and (ii) the incorporation of the photo-reactive amino acid p-benzoylphenylalanine (Bpa) into PPAR-β/δ by genetic engineering. The distances derived from cross-linking experiments allowed us to monitor conformational changes in PPAR-β/δ upon ligand binding. The cross-linking/MS approach proved highly advantageous to study nuclear receptors, such as PPARs, and revealed the interplay between DBD (DNA-binding domain) and LDB in PPAR-β/δ. Our results indicate the stabilization of a specific conformation through ligand binding in PPAR-β/δ LBD as well as full-length PPAR-β/δ. Moreover, our results suggest a close distance between the N- and C-terminal regions of full-length PPAR-β/δ in the presence of GW1516. Chemical cross-linking/MS allowed us gaining detailed insights into conformational changes that are induced in PPARs when activating ligands are present. Thus, cross-linking/MS should be added to the arsenal of structural methods available for studying nuclear receptors.
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Affiliation(s)
- Rico Schwarz
- Department of Pharmaceutical Chemistry and Bioanalytics, Institute of Pharmacy, Martin Luther University Halle-Wittenberg, D-06120, Halle/Saale, Germany
| | - Dirk Tänzler
- Department of Pharmaceutical Chemistry and Bioanalytics, Institute of Pharmacy, Martin Luther University Halle-Wittenberg, D-06120, Halle/Saale, Germany
| | - Christian H. Ihling
- Department of Pharmaceutical Chemistry and Bioanalytics, Institute of Pharmacy, Martin Luther University Halle-Wittenberg, D-06120, Halle/Saale, Germany
| | - Andrea Sinz
- Department of Pharmaceutical Chemistry and Bioanalytics, Institute of Pharmacy, Martin Luther University Halle-Wittenberg, D-06120, Halle/Saale, Germany
- * E-mail:
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40
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Sakurai K, Hatai Y, Okada A. Gold nanoparticle-based multivalent carbohydrate probes: selective photoaffinity labeling of carbohydrate-binding proteins. Chem Sci 2016; 7:702-706. [PMID: 28791113 PMCID: PMC5530003 DOI: 10.1039/c5sc03275j] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2015] [Accepted: 10/19/2015] [Indexed: 12/22/2022] Open
Abstract
Multivalent carbohydrate photoaffinity probes were developed based on gold nanoparticles (AuNPs) to provide a streamlined approach toward identification of carbohydrate-binding proteins. By using AuNPs as scaffolds, a carbohydrate ligand and a photoreactive group could be readily assembled on a probe in a modular fashion, which greatly accelerated the process of optimizing the probe design. The novel AuNP-based probes serve dual functions by facilitating photoaffinity labeling and by directly enriching the crosslinked proteins by centrifugation. We demonstrated that their ability to enhance the affinity and to stringently remove nonspecific proteins allowed selective photoaffinity labeling and isolation of a low affinity carbohydrate-binding protein in cell lysate.
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Affiliation(s)
- Kaori Sakurai
- Department of Biotechnology and Life Science , Tokyo University of Agriculture and Technology , Tokyo 184-8588 , Japan .
| | - Yuki Hatai
- Department of Biotechnology and Life Science , Tokyo University of Agriculture and Technology , Tokyo 184-8588 , Japan .
| | - Ayumi Okada
- Department of Biotechnology and Life Science , Tokyo University of Agriculture and Technology , Tokyo 184-8588 , Japan .
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Maklashina E, Rajagukguk S, Starbird CA, McDonald WH, Koganitsky A, Eisenbach M, Iverson TM, Cecchini G. Binding of the Covalent Flavin Assembly Factor to the Flavoprotein Subunit of Complex II. J Biol Chem 2015; 291:2904-16. [PMID: 26644464 DOI: 10.1074/jbc.m115.690396] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2015] [Indexed: 01/23/2023] Open
Abstract
Escherichia coli harbors two highly conserved homologs of the essential mitochondrial respiratory complex II (succinate:ubiquinone oxidoreductase). Aerobically the bacterium synthesizes succinate:quinone reductase as part of its respiratory chain, whereas under microaerophilic conditions, the quinol:fumarate reductase can be utilized. All complex II enzymes harbor a covalently bound FAD co-factor that is essential for their ability to oxidize succinate. In eukaryotes and many bacteria, assembly of the covalent flavin linkage is facilitated by a small protein assembly factor, termed SdhE in E. coli. How SdhE assists with formation of the covalent flavin bond and how it binds the flavoprotein subunit of complex II remain unknown. Using photo-cross-linking, we report the interaction site between the flavoprotein of complex II and the SdhE assembly factor. These data indicate that SdhE binds to the flavoprotein between two independently folded domains and that this binding mode likely influences the interdomain orientation. In so doing, SdhE likely orients amino acid residues near the dicarboxylate and FAD binding site, which facilitates formation of the covalent flavin linkage. These studies identify how the conserved SdhE assembly factor and its homologs participate in complex II maturation.
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Affiliation(s)
- Elena Maklashina
- From the Molecular Biology Division, Veterans Affairs Medical Center, San Francisco, California 94121, the Department of Biochemistry & Biophysics, University of California, San Francisco, California 94158
| | - Sany Rajagukguk
- From the Molecular Biology Division, Veterans Affairs Medical Center, San Francisco, California 94121
| | | | - W Hayes McDonald
- the Department of Biochemistry and Mass Spectrometry Research Center
| | - Anna Koganitsky
- the Department of Biological Chemistry, Weizmann Institute of Science, 76100 Rehovot, Israel
| | - Michael Eisenbach
- the Department of Biological Chemistry, Weizmann Institute of Science, 76100 Rehovot, Israel
| | - Tina M Iverson
- the Department of Biochemistry and Mass Spectrometry Research Center, the Department of Pharmacology, the Center for Structural Biology, and the Vanderbilt Institute of Chemical Biology, Vanderbilt University, Nashville, Tennessee 37232, and
| | - Gary Cecchini
- From the Molecular Biology Division, Veterans Affairs Medical Center, San Francisco, California 94121, the Department of Biochemistry & Biophysics, University of California, San Francisco, California 94158,
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42
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Recent developments and applications of clickable photoprobes in medicinal chemistry and chemical biology. Future Med Chem 2015; 7:2143-71. [DOI: 10.4155/fmc.15.136] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Photoaffinity labeling is a well-known biochemical technique that has grown significantly since the turn of the century, principally due to its combination with bioorthogonal/click chemistry reactions. This review highlights new developments and applications of clickable photoprobes in medicinal chemistry and chemical biology. In particular, recent examples of clickable photoprobes for target identification, activity- or affinity-based protein profiling (ABPP or AfBPP), characterization of sterol– or lipid–protein interactions and characterization of ligand-binding sites are presented.
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Hagen S, Drepper F, Fischer S, Fodor K, Passon D, Platta HW, Zenn M, Schliebs W, Girzalsky W, Wilmanns M, Warscheid B, Erdmann R. Structural insights into cargo recognition by the yeast PTS1 receptor. J Biol Chem 2015; 290:26610-26. [PMID: 26359497 DOI: 10.1074/jbc.m115.657973] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2015] [Indexed: 11/06/2022] Open
Abstract
The peroxisomal matrix protein import is facilitated by cycling import receptors that shuttle between the cytosol and the peroxisomal membrane. The import receptor Pex5p mediates the import of proteins harboring a peroxisomal targeting signal of type I (PTS1). Purified recombinant Pex5p forms a dimeric complex with the PTS1-protein Pcs60p in vitro with a KD of 0.19 μm. To analyze the structural basis for receptor-cargo recognition, the PTS1 and adjacent amino acids of Pcs60p were systematically scanned for Pex5p binding by an in vitro site-directed photo-cross-linking approach. The cross-linked binding regions of the receptor were subsequently identified by high resolution mass spectrometry. Most cross-links were found with TPR6, TPR7, as well as the 7C-loop of Pex5p. Surface plasmon resonance analysis revealed a bivalent interaction mode for Pex5p and Pcs60p. Interestingly, Pcs60p lacking its C-terminal tripeptide sequence was efficiently cross-linked to the same regions of Pex5p. The KD value of the interaction of truncated Pcs60p and Pex5p was in the range of 7.7 μm. Isothermal titration calorimetry and surface plasmon resonance measurements revealed a monovalent binding mode for the interaction of Pex5p and Pcs60p lacking the PTS1. Our data indicate that Pcs60p contains a second contact site for its receptor Pex5p, beyond the C-terminal tripeptide. The physiological relevance of the ancillary binding region was supported by in vivo import studies. The bivalent binding mode might be explained by a two-step concept as follows: first, cargo recognition and initial tethering by the PTS1-receptor Pex5p; second, lock-in of receptor and cargo.
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Affiliation(s)
- Stefanie Hagen
- From the Institute of Biochemistry and Pathobiochemistry, Faculty of Medicine, System Biochemistry, Ruhr-University Bochum, D-44780 Bochum, Germany
| | - Friedel Drepper
- the Department of Biochemistry and Functional Proteomics, Faculty of Biology and BIOSS Centre for Biological Signaling Studies, University of Freiburg, D-79104 Freiburg, Germany
| | - Sven Fischer
- the Department of Biochemistry and Functional Proteomics, Faculty of Biology and BIOSS Centre for Biological Signaling Studies, University of Freiburg, D-79104 Freiburg, Germany
| | - Krisztian Fodor
- the Department of Biochemistry, Eötvös Loránd University, H-1117 Budapest, Hungary
| | - Daniel Passon
- the European Molecular Biology Laboratory at Hamburg, D-22607 Hamburg, Germany
| | - Harald W Platta
- the Institute of Biochemistry and Pathobiochemistry, Faculty of Medicine, Biochemistry of Intracellular Transport Mechanism, Ruhr-University Bochum, D-44781 Bochum, Germany, and
| | - Michael Zenn
- the Biaffin GmbH and Co., KG, D-34132 Kassel, Germany
| | - Wolfgang Schliebs
- From the Institute of Biochemistry and Pathobiochemistry, Faculty of Medicine, System Biochemistry, Ruhr-University Bochum, D-44780 Bochum, Germany
| | - Wolfgang Girzalsky
- From the Institute of Biochemistry and Pathobiochemistry, Faculty of Medicine, System Biochemistry, Ruhr-University Bochum, D-44780 Bochum, Germany
| | - Matthias Wilmanns
- the European Molecular Biology Laboratory at Hamburg, D-22607 Hamburg, Germany
| | - Bettina Warscheid
- the Department of Biochemistry and Functional Proteomics, Faculty of Biology and BIOSS Centre for Biological Signaling Studies, University of Freiburg, D-79104 Freiburg, Germany
| | - Ralf Erdmann
- From the Institute of Biochemistry and Pathobiochemistry, Faculty of Medicine, System Biochemistry, Ruhr-University Bochum, D-44780 Bochum, Germany,
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Sakurai K, Ozawa S, Yamaguchi T. Photoaffinity labeling studies of the carbohydrate-binding proteins with different affinities. Bioorg Med Chem 2015; 23:5319-25. [PMID: 26264843 DOI: 10.1016/j.bmc.2015.07.065] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Revised: 07/09/2015] [Accepted: 07/28/2015] [Indexed: 10/23/2022]
Abstract
Photoaffinity labeling has been used as a promising approach to detection and isolation of carbohydrate-binding proteins, which are typically characterized by low binding affinity and selectivity. When there are several specific binding proteins, it is desirable that a photoaffinity probe is capable of simultaneously crosslinking them and that the crosslinking yields depend on the relative binding affinities. In this study, we describe the design and synthesis of carbohydrate photoaffinity probes and their ability to capture lectins of different binding affinities.
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Affiliation(s)
- Kaori Sakurai
- Department of Biotechnology and Life Science, Tokyo University of Agriculture and Technology, Naka-cho, 2-24-16, Koganei, Tokyo 184-8588, Japan.
| | - Shimpei Ozawa
- Department of Biotechnology and Life Science, Tokyo University of Agriculture and Technology, Naka-cho, 2-24-16, Koganei, Tokyo 184-8588, Japan
| | - Tamayo Yamaguchi
- Department of Biotechnology and Life Science, Tokyo University of Agriculture and Technology, Naka-cho, 2-24-16, Koganei, Tokyo 184-8588, Japan
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Abstract
Numerous biological applications, from diagnostic assays to immunotherapies, rely on the use of antibody-conjugates. The efficacy of these conjugates can be significantly influenced by the site at which Immunoglobulin G (IgG) is modified. Current methods that provide control over the conjugation site, however, suffer from a number of shortfalls and often require large investments of time and cost. We have developed a novel adapter protein that, when activated by long wavelength UV light, can covalently and site-specifically label the Fc region of nearly any native, full-length IgG, including all human IgG subclasses. Labeling occurs with unprecedented efficiency and speed (>90% after 30 min), with no effect on IgG affinity. The adapter domain can be bacterially expressed and customized to contain a variety of moieties (e.g., biotin, azide, fluorophores), making reliable and efficient conjugation of antibodies widely accessible to researchers at large.
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Affiliation(s)
| | | | - Yang Song
- Department of Bioengineering, University of Pennsylvania, 210 South 33rd Street, 240 Skirkanich Hall, Philadelphia, PA 19104, USA
| | - Andrew Tsourkas
- Department of Bioengineering, University of Pennsylvania, 210 South 33rd Street, 240 Skirkanich Hall, Philadelphia, PA 19104, USA
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Pettelkau J, Ihling CH, Frohberg P, van Werven L, Jahn O, Sinz A. Reliable identification of cross-linked products in protein interaction studies by 13C-labeled p-benzoylphenylalanine. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2014; 25:1628-1641. [PMID: 25031183 DOI: 10.1007/s13361-014-0944-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2014] [Revised: 05/22/2014] [Accepted: 05/26/2014] [Indexed: 06/03/2023]
Abstract
We describe the use of the (13)C-labeled artificial amino acid p-benzoyl-L-phenylalanine (Bpa) to improve the reliability of cross-linked product identification. Our strategy is exemplified for two protein-peptide complexes. These studies indicate that in many cases the identification of a cross-link without additional stable isotope labeling would result in an ambiguous assignment of cross-linked products. The use of a (13)C-labeled photoreactive amino acid is considered to be preferred over the use of deuterated cross-linkers as retention time shifts in reversed phase chromatography can be ruled out. The observation of characteristic fragment ions additionally increases the reliability of cross-linked product assignment. Bpa possesses a broad reactivity towards different amino acids and the derived distance information allows mapping of spatially close amino acids and thus provides more solid structural information of proteins and protein complexes compared to the longer deuterated amine-reactive cross-linkers, which are commonly used for protein 3D-structure analysis and protein-protein interaction studies.
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Affiliation(s)
- Jens Pettelkau
- Department of Pharmaceutical Chemistry and Bioanalytics, Institute of Pharmacy, Martin-Luther University Halle-Wittenberg, 06120, Halle (Saale), Germany
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Hui JZ, Tsourkas A. Optimization of photoactive protein Z for fast and efficient site-specific conjugation of native IgG. Bioconjug Chem 2014; 25:1709-19. [PMID: 25121619 PMCID: PMC4166039 DOI: 10.1021/bc500305v] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Antibody conjugates have been used in a variety of applications from immunoassays to drug conjugates. However, it is becoming increasingly clear that in order to maximize an antibody's antigen binding ability and to produce homogeneous antibody-conjugates, the conjugated molecule should be attached onto IgG site-specifically. We previously developed a facile method for the site-specific modification of full length, native IgGs by engineering a recombinant Protein Z that forms a covalent link to the Fc domain of IgG upon exposure to long wavelength UV light. To further improve the efficiency of Protein Z production and IgG conjugation, we constructed a panel of 13 different Protein Z variants with the UV-active amino acid benzoylphenylalanine (BPA) in different locations. By using this panel of Protein Z to cross-link a range of IgGs from different hosts, including human, mouse, and rat, we discovered two previously unknown Protein Z variants, L17BPA and K35BPA, that are capable of cross-linking many commonly used IgG isotypes with efficiencies ranging from 60% to 95% after only 1 h of UV exposure. When compared to existing site-specific methods, which often require cloning or enzymatic reactions, the Protein Z-based method described here, utilizing the L17BPA, K35BPA, and the previously described Q32BPA variants, represents a vastly more accessible and efficient approach that is compatible with nearly all native IgGs, thus making site-specific conjugation more accessible to the general research community.
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Affiliation(s)
- James Z Hui
- Department of Bioengineering, University of Pennsylvania , 210 South 33rd Street, 240 Skirkanich Hall, Philadelphia, Pennsylvania 19104, United States
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Presequence recognition by the tom40 channel contributes to precursor translocation into the mitochondrial matrix. Mol Cell Biol 2014; 34:3473-85. [PMID: 25002531 DOI: 10.1128/mcb.00433-14] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
More than 70% of mitochondrial proteins utilize N-terminal presequences as targeting signals. Presequence interactions with redundant cytosolic receptor domains of the translocase of the outer mitochondrial membrane (TOM) are well established. However, after the presequence enters the protein-conducting Tom40 channel, the recognition events that occur at the trans side leading up to the engagement of the presequence with inner membrane-bound receptors are less well defined. Using a photoaffinity-labeling approach with modified presequence peptides, we identified Tom40 as a presequence interactor of the TOM complex. Utilizing mass spectrometry, we mapped Tom40's presequence-interacting regions to both sides of the β-barrel. Analysis of a phosphorylation site within one of the presequence-interacting regions revealed altered translocation kinetics along the presequence pathway. Our analyses assess the relation between the identified presequence-binding region of Tom40 and the intermembrane space domain of Tom22. The identified presequence-interacting region of Tom40 is capable of functioning independently of the established trans-acting TOM presequence-binding domain during matrix import.
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49
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Garre S, Senevirathne C, Pflum MKH. A comparative study of ATP analogs for phosphorylation-dependent kinase-substrate crosslinking. Bioorg Med Chem 2014; 22:1620-5. [PMID: 24529309 PMCID: PMC4524338 DOI: 10.1016/j.bmc.2014.01.034] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2013] [Revised: 01/10/2014] [Accepted: 01/20/2014] [Indexed: 02/03/2023]
Abstract
Kinase-catalyzed protein phosphorylation is an important post-translational modification that regulates a variety of cellular functions. Identification of the many substrates of a specific kinase is critical to fully characterize cell biology. Unfortunately, kinase-substrate interactions are often transient, which makes their identification challenging. Here, the transient kinase-substrate complex was stabilized by covalent crosslinking using γ-phosphate modified ATP analogs. Building upon prior use of an ATP-aryl azide photocrosslinking analog, we report here the creation of an ATP-benzophenone photocrosslinking analog. ATP-benzophenone displayed a higher conversion percentage but more diffuse crosslinking compared to the ATP-aryl azide analog. A docking study was also performed to rationalize the conversion and crosslinking data. In total, the photocrosslinking ATP analogs produced stable kinase-substrate complexes that are suitable for future applications characterizing cell signaling pathways.
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Affiliation(s)
- Satish Garre
- Department of Chemistry, Wayne State University, Detroit, MI 48202, United States
| | - Chamara Senevirathne
- Department of Chemistry, Wayne State University, Detroit, MI 48202, United States
| | - Mary Kay H Pflum
- Department of Chemistry, Wayne State University, Detroit, MI 48202, United States.
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50
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Iyer LK, Moorthy BS, Topp EM. Photolytic labeling to probe molecular interactions in lyophilized powders. Mol Pharm 2013; 10:4629-39. [PMID: 24125175 DOI: 10.1021/mp4004332] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Local side-chain interactions in lyophilized protein formulations were mapped using solid-state photolytic labeling-mass spectrometry (ssPL-MS). Photoactive amino acid analogues (PAAs) were used as probes and either added to the lyophilized matrix or incorporated within the amino acid sequence of a peptide. In the first approach, apomyoglobin was lyophilized with sucrose and varying concentrations of photoleucine (L-2-amino-4,4'-azipentanoic acid; pLeu). The lyophilized solid was irradiated at 365 nm to initiate photolabeling. The rate and extent of labeling were measured using electrospray ionization/high-performance liquid chromatography/mass spectrometry (ESI-HPLC-MS), with labeling reaching a plateau at ~30 min, forming up to six labeled populations. Bottom-up MS/MS analysis was able to provide peptide-level resolution of the location of pLeu. ssPL-MS was also able to detect differences in side-chain environment between sucrose and guanidine hydrochloride formulations. In the second approach, peptide GCG (1-8)* containing p-benzoyl-L-phenylalanine (pBpA) in the amino acid sequence was lyophilized with various excipients and irradiated. Peptide-peptide and peptide-excipient adducts were detected using MS. Top-down MS/MS on the peptide dimer provided amino acid-level resolution regarding interactions and the cross-linking partner for pBpA in the solid state. The results show that ssPL-MS can provide high-resolution information about protein interactions in the lyophilized environment.
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Affiliation(s)
- Lavanya K Iyer
- Department of Industrial and Physical Pharmacy, Purdue University , West Lafayette, Indiana 47901, United States
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