1
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Faris J, Adaligil E, Popovych N, Ono S, Takahashi M, Nguyen H, Plise E, Taechalertpaisarn J, Lee HW, Koehler MFT, Cunningham CN, Lokey RS. Membrane Permeability in a Large Macrocyclic Peptide Driven by a Saddle-Shaped Conformation. J Am Chem Soc 2024; 146:4582-4591. [PMID: 38330910 PMCID: PMC10885153 DOI: 10.1021/jacs.3c10949] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 01/10/2024] [Accepted: 01/17/2024] [Indexed: 02/10/2024]
Abstract
The effort to modulate challenging protein targets has stimulated interest in ligands that are larger and more complex than typical small-molecule drugs. While combinatorial techniques such as mRNA display routinely produce high-affinity macrocyclic peptides against classically undruggable targets, poor membrane permeability has limited their use toward primarily extracellular targets. Understanding the passive membrane permeability of macrocyclic peptides would, in principle, improve our ability to design libraries whose leads can be more readily optimized against intracellular targets. Here, we investigate the permeabilities of over 200 macrocyclic 10-mers using the thioether cyclization motif commonly found in mRNA display macrocycle libraries. We identified the optimal lipophilicity range for achieving permeability in thioether-cyclized 10-mer cyclic peptide-peptoid hybrid scaffolds and showed that permeability could be maintained upon extensive permutation in the backbone. In one case, changing a single amino acid from d-Pro to d-NMe-Ala, representing the loss of a single methylene group in the side chain, resulted in a highly permeable scaffold in which the low-dielectric conformation shifted from the canonical cross-beta geometry of the parent compounds into a novel saddle-shaped fold in which all four backbone NH groups were sequestered from the solvent. This work provides an example by which pre-existing physicochemical knowledge of a scaffold can benefit the design of macrocyclic peptide mRNA display libraries, pointing toward an approach for biasing libraries toward permeability by design. Moreover, the compounds described herein are a further demonstration that geometrically diverse, highly permeable scaffolds exist well beyond conventional drug-like chemical space.
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Affiliation(s)
- Justin
H. Faris
- Department
of Chemistry and Biochemistry, University
of California, Santa
Cruz, California 95064, United States
| | - Emel Adaligil
- Department
of Peptide Therapeutics, Genentech, South San Francisco, California 94080, United States
| | - Nataliya Popovych
- Department
of Early Discovery Biochemistry, Genentech, South San Francisco, California 94080, United States
| | - Satoshi Ono
- Innovative
Research Division, Mitsubishi Tanabe Pharma
Corporation, Kanagawa 227-0033, Japan
| | - Mifune Takahashi
- Department
of Drug Metabolism and Pharmacokinetics, Genentech, South
San Francisco, California 94080, United States
| | - Huy Nguyen
- Department
of Analytical Research, Genentech, South San Francisco, California 94080, United States
| | - Emile Plise
- Department
of Drug Metabolism and Pharmacokinetics, Genentech, South
San Francisco, California 94080, United States
| | - Jaru Taechalertpaisarn
- Department
of Chemistry and Biochemistry, University
of California, Santa
Cruz, California 95064, United States
| | - Hsiau-Wei Lee
- Department
of Chemistry and Biochemistry, University
of California, Santa
Cruz, California 95064, United States
| | - Michael F. T. Koehler
- Department
of Medicinal Chemistry, Genentech, South San Francisco, California 94080, United States
| | - Christian N. Cunningham
- Department
of Peptide Therapeutics, Genentech, South San Francisco, California 94080, United States
| | - R. Scott Lokey
- Department
of Chemistry and Biochemistry, University
of California, Santa
Cruz, California 95064, United States
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2
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Vasco AV, Ceballos LG, Wessjohann LA, Rivera DG. Multicomponent Functionalization of the Octreotide Peptide Macrocyclic Scaffold. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Aldrin V. Vasco
- Leibniz Institute of Plant Biochemistry: Leibniz-Institut fur Pflanzenbiochemie Bioorganic Chemistry GERMANY
| | | | - Ludger A. Wessjohann
- Leibniz Institute of Plant Biochemistry: Leibniz-Institut fur Pflanzenbiochemie Bioorganic Chemistry GERMANY
| | - Daniel García Rivera
- Universidad de la Habana Laboratory of Synthetic and Biomolecular Chemistry Zapata y G 10400 La Habana CUBA
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3
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Taechalertpaisarn J, Ono S, Okada O, Johnstone TC, Scott Lokey R. A New Amino Acid for Improving Permeability and Solubility in Macrocyclic Peptides through Side Chain-to-Backbone Hydrogen Bonding. J Med Chem 2022; 65:5072-5084. [PMID: 35275623 PMCID: PMC10681114 DOI: 10.1021/acs.jmedchem.2c00010] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Despite the notoriously poor membrane permeability of peptides, many cyclic peptide natural products show high passive membrane permeability and potently inhibit a variety of "undruggable" intracellular targets. A major impediment to the design of cyclic peptides with good permeability is the high desolvation energy associated with the peptide backbone amide NH groups. While several strategies have been proposed to mitigate this deleterious effect, only few studies have used polar side chains to sequester backbone NH groups. We investigated the ability of N,N-pyrrolidinylglutamine (Pye), whose side chain contains a powerful hydrogen-bond-accepting C═O amide group but no hydrogen-bond donors, to sequester exposed backbone NH groups in a series of cyclic hexapeptide diastereomers. Analyses revealed that specific Leu-to-Pye substitutions conferred dramatic improvements in aqueous solubility and permeability in a scaffold- and position-dependent manner. Therefore, this approach offers a complementary tool for improving membrane permeability and solubility in cyclic peptides.
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Affiliation(s)
- Jaru Taechalertpaisarn
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, 1156 High Street, Santa Cruz, California 95064, United States
| | - Satoshi Ono
- Modality Laboratories, Innovative Research Division, Mitsubishi Tanabe Pharma Corporation, 1000 Kamoshidacho, Aoba-ku, Yokohama, Kanagawa 227-0033, Japan
| | - Okimasa Okada
- Modality Laboratories, Innovative Research Division, Mitsubishi Tanabe Pharma Corporation, 1000 Kamoshidacho, Aoba-ku, Yokohama, Kanagawa 227-0033, Japan
| | - Timothy C. Johnstone
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, 1156 High Street, Santa Cruz, California 95064, United States
| | - R. Scott Lokey
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, 1156 High Street, Santa Cruz, California 95064, United States
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4
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Hoang HN, Hill TA, Ruiz-Gómez G, Diness F, Mason JM, Wu C, Abbenante G, Shepherd NE, Fairlie DP. Twists or turns: stabilising alpha vs. beta turns in tetrapeptides. Chem Sci 2019; 10:10595-10600. [PMID: 32110345 PMCID: PMC7020788 DOI: 10.1039/c9sc04153b] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Accepted: 10/03/2019] [Indexed: 01/03/2023] Open
Abstract
Protein-protein interactions involve hotspots as small as 4 sequential amino acids. Corresponding tetrapeptides have no structure in water. Here we report linking side chains of amino acids X and Z to form 24 cyclic tetrapeptides, cyclo-[XAAZ]-NH2, and stabilise 14-18 membered rings that mimic different kinds of non-regular secondary structures found in protein hotspots. 2D NMR spectra allowed determination of 3D structures for 14 cyclic tetrapeptides in water. Five formed two (i, i + 3) hydrogen bonds and a beta/gamma (6, 7) or beta (9, 19, 20) turn; eight formed one (i, i + 4) hydrogen bond and twisted into a non-helical (13, 18, 21, 22, 24) or helical (5, 17, 23) alpha turn; one was less structured (15). A beta or gamma turn was favoured for Z = Dab, Orn or Glu due to a χ1 gauche (+) rotamer, while an alpha turn was favoured for Z = Dap (but not X = Dap) due to a gauche (-) rotamer. Surprisingly, an unstructured peptide ARLARLARL could be twisted into a helix when either a helical or non-helical alpha turn (5, 13, 17, 18, 21-24) with Z = Dap was attached to the N-terminus. These structural models provide insights into stability for different turns and twists corresponding to non-regular folds in protein hotspots.
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Affiliation(s)
- Huy N Hoang
- Australian Research Council Centre of Excellence in Advanced Molecular Imaging , Institute for Molecular Bioscience , The University of Queensland , Brisbane , QLD 4072 , Australia .
| | - Timothy A Hill
- Australian Research Council Centre of Excellence in Advanced Molecular Imaging , Institute for Molecular Bioscience , The University of Queensland , Brisbane , QLD 4072 , Australia .
| | - Gloria Ruiz-Gómez
- Australian Research Council Centre of Excellence in Advanced Molecular Imaging , Institute for Molecular Bioscience , The University of Queensland , Brisbane , QLD 4072 , Australia .
- Structural Bioinformatics , BIOTEC , Technische Universität Dresden , Tatzberg 47-51 , 01307 Dresden , Germany
| | - Frederik Diness
- Australian Research Council Centre of Excellence in Advanced Molecular Imaging , Institute for Molecular Bioscience , The University of Queensland , Brisbane , QLD 4072 , Australia .
- Center for Evolutionary Chemical Biology , Department of Chemistry , University of Copenhagen , 2100 Copenhagen , Denmark
| | - Jody M Mason
- Australian Research Council Centre of Excellence in Advanced Molecular Imaging , Institute for Molecular Bioscience , The University of Queensland , Brisbane , QLD 4072 , Australia .
- Department of Biology & Biochemistry , University of Bath , Claverton Down , Bath , BA2 7AY , UK
| | - Chongyang Wu
- Australian Research Council Centre of Excellence in Advanced Molecular Imaging , Institute for Molecular Bioscience , The University of Queensland , Brisbane , QLD 4072 , Australia .
| | - Giovanni Abbenante
- Australian Research Council Centre of Excellence in Advanced Molecular Imaging , Institute for Molecular Bioscience , The University of Queensland , Brisbane , QLD 4072 , Australia .
| | - Nicholas E Shepherd
- Australian Research Council Centre of Excellence in Advanced Molecular Imaging , Institute for Molecular Bioscience , The University of Queensland , Brisbane , QLD 4072 , Australia .
| | - David P Fairlie
- Australian Research Council Centre of Excellence in Advanced Molecular Imaging , Institute for Molecular Bioscience , The University of Queensland , Brisbane , QLD 4072 , Australia .
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Appavoo SD, Huh S, Diaz DB, Yudin AK. Conformational Control of Macrocycles by Remote Structural Modification. Chem Rev 2019; 119:9724-9752. [DOI: 10.1021/acs.chemrev.8b00742] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Solomon D. Appavoo
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, 80 Saint George Street, Toronto, Ontario, Canada M5S 3H6
| | - Sungjoon Huh
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, 80 Saint George Street, Toronto, Ontario, Canada M5S 3H6
| | - Diego B. Diaz
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, 80 Saint George Street, Toronto, Ontario, Canada M5S 3H6
| | - Andrei K. Yudin
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, 80 Saint George Street, Toronto, Ontario, Canada M5S 3H6
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6
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Zhao D, Huang Z, Liu J, Ma L, He J. Expression, purification, and characterization of N-terminal His-tagged proteins with mutations in zinc finger 3 of zinc finger protein ZNF191(243-368). Prep Biochem Biotechnol 2018; 48:914-919. [PMID: 30296200 DOI: 10.1080/10826068.2018.1514518] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Zinc finger protein ZNF191(243-368), the zinc finger region of ZNF191, is potentially associated with cell proliferation in hepatocellular carninoma. A His-tag expression system was used to express and purify proteins with mutations in the zinc finger 3 of ZNF191(243-368) for analysis of protein properties, structure, and functions. The purification of the His-tag fusion proteins was simpler and faster than that of the ZNF191(243-368) inclusion bodies. The properties and structures of the His-tag fusion mutant proteins were investigated using spectrographic techniques and DNA hydrolysis experiment. The His6-tag system could be used to express ZNF191(243-368). The presence of the His6-tag at the N-terminus of ZNF191(243-368) did not evidently affect its properties and structure. However, the site-directed mutations in zinc finger 3 affected the structure of the protein. The DNA hydrolase activity of His6-ZF-F3/H4 suggested that four histidines in zinc finger 3 might form a structure similar to that of the active center in a hydrolase. This work reports that continuous histidines need to form a certain structure for specific functions, and provides new insights into the design of an artificial nuclease.
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Affiliation(s)
- Dongxin Zhao
- a College of Chemistry, Chemical and Environmental Engineering , Henan University of Technology , Zhengzhou , Henan , China
| | - Zhongxian Huang
- b Department of Chemistry , Fudan University , Shanghai , China
| | - Jie Liu
- a College of Chemistry, Chemical and Environmental Engineering , Henan University of Technology , Zhengzhou , Henan , China
| | - Li Ma
- a College of Chemistry, Chemical and Environmental Engineering , Henan University of Technology , Zhengzhou , Henan , China
| | - Juan He
- a College of Chemistry, Chemical and Environmental Engineering , Henan University of Technology , Zhengzhou , Henan , China
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7
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Effect of His-Tag on Expression, Purification, and Structure of Zinc Finger Protein, ZNF191(243-368). Bioinorg Chem Appl 2016; 2016:8206854. [PMID: 27524954 PMCID: PMC4971304 DOI: 10.1155/2016/8206854] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Revised: 06/13/2016] [Accepted: 06/23/2016] [Indexed: 11/17/2022] Open
Abstract
Zinc finger proteins are associated with hereditary diseases and cancers. To obtain an adequate amount of zinc finger proteins for studying their properties, structure, and functions, many protein expression systems are used. ZNF191(243-368) is a zinc finger protein and can be fused with His-tag to generate fusion proteins such as His6-ZNF191(243-368) and ZNF191(243-368)-His8. The purification of His-tag protein using Ni-NTA resin can overcome the difficulty of ZNF191(243-368) separation caused by inclusion body formation. The influences of His-tag on ZNF191(243-368) properties and structure were investigated using spectrographic techniques and hydrolase experiment. Our findings suggest that insertion of a His-tag at the N-terminal or C-terminal end of ZNF191(243-368) has different effects on the protein. Therefore, an expression system should be considered based on the properties and structure of the protein. Furthermore, the hydrolase activity of ZNF191(243-368)-His8 has provided new insights into the design of biological functional molecules.
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8
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Xin D, Raghuraman A, Burgess K. Extended Piperidine–Piperidinone Protein Interface Mimics. J Org Chem 2015; 80:4450-8. [DOI: 10.1021/acs.joc.5b00300] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Dongyue Xin
- Department of Chemistry, Texas A & M University, Box 30012, College Station, Texas 77842, United States
| | - Arjun Raghuraman
- Department of Chemistry, Texas A & M University, Box 30012, College Station, Texas 77842, United States
| | - Kevin Burgess
- Department of Chemistry, Texas A & M University, Box 30012, College Station, Texas 77842, United States
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9
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Yudin AK. Macrocycles: lessons from the distant past, recent developments, and future directions. Chem Sci 2015; 6:30-49. [PMID: 28553456 PMCID: PMC5424464 DOI: 10.1039/c4sc03089c] [Citation(s) in RCA: 337] [Impact Index Per Article: 37.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2014] [Accepted: 11/01/2014] [Indexed: 12/20/2022] Open
Abstract
A noticeable increase in molecular complexity of drug targets has created an unmet need in the therapeutic agents that are larger than traditional small molecules. Macrocycles, which are cyclic compounds comprising 12 atoms or more, are now recognized as molecules that "are up to the task" to interrogate extended protein interfaces. However, because macrocycles (particularly the ones based on peptides) are equipped with large polar surface areas, achieving cellular permeability and bioavailability is anything but straightforward. While one might consider this to be the Achilles' heel of this class of compounds, the synthetic community continues to develop creative approaches toward the synthesis of macrocycles and their site-selective modification. This perspective provides an overview of both mechanistic and structural issues that bear on macrocycles as a unique class of molecules. The reader is offered a historical foray into some of the classic studies that have resulted in the current renaissance of macrocycles. In addition, an attempt is made to overview the more recent developments that give hope that macrocycles might indeed turn into a useful therapeutic modality.
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Affiliation(s)
- Andrei K Yudin
- Department of Chemistry , University of Toronto , 80 St. George Street , Toronto , Ontario M5S 3H6 , Canada . ; Blog: http://www.amphoteros.com
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10
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Rabong C, Schuster C, Liptaj T, Prónayová N, Delchev VB, Jordis U, Phopase J. NXO beta structure mimicry: an ultrashort turn/hairpin mimic that folds in water. RSC Adv 2014. [DOI: 10.1039/c4ra01210k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An NXO building block derived tetrapeptide mimic emulates a natural proline-glycine β-turn/hairpin in polar media, including water at room temperature.
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Affiliation(s)
- Constantin Rabong
- Institute of Applied Synthetic Chemistry
- Vienna University of Technology
- A-1060 Vienna, Austria
| | - Christoph Schuster
- Department of Environmental Geosciences
- University of Vienna
- A-1090 Vienna, Austria
| | - Tibor Liptaj
- Department of NMR and Mass Spectrometry
- Institute of Analytical Chemistry
- Faculty of Chemical and Food Technology
- Slovak University of Technology
- 81237 Bratislava, Slovak Republic
| | - Nadežda Prónayová
- Department of NMR and Mass Spectrometry
- Institute of Analytical Chemistry
- Faculty of Chemical and Food Technology
- Slovak University of Technology
- 81237 Bratislava, Slovak Republic
| | - Vassil B. Delchev
- Department of Physical Chemistry
- University of Plovdiv
- 4000 Plovdiv, Bulgaria
| | - Ulrich Jordis
- Institute of Applied Synthetic Chemistry
- Vienna University of Technology
- A-1060 Vienna, Austria
| | - Jaywant Phopase
- Integrative Regenerative Medicine Centre (IGEN) & Department of Physics
- Chemistry and Biology (IFM)
- 58183 Linköping, Sweden
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11
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Zaretsky S, Scully CCG, Lough AJ, Yudin AK. Exocyclic control of turn induction in macrocyclic peptide scaffolds. Chemistry 2013; 19:17668-72. [PMID: 24259185 DOI: 10.1002/chem.201303453] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2013] [Indexed: 11/08/2022]
Affiliation(s)
- Serge Zaretsky
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, 80 St. George Str., Toronto, ON, M5S 3H6 (Canada)
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12
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Vlassi M, Brauns K, Andrade-Navarro MA. Short tandem repeats in the inhibitory domain of the mineralocorticoid receptor: prediction of a β-solenoid structure. BMC STRUCTURAL BIOLOGY 2013; 13:17. [PMID: 24088384 PMCID: PMC3851330 DOI: 10.1186/1472-6807-13-17] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/31/2013] [Accepted: 09/25/2013] [Indexed: 11/20/2022]
Abstract
Background The human mineralocorticoid receptor (MR) is one of the main components of the renin-angiotensin-aldosterone system (RAAS), the system that regulates the body exchange of water and sodium. The evolutionary origins of this protein predate those of renin and the RAAS; accordingly it has other roles, which are being characterized. The MR has two trans-activating ligand independent domains and one inhibitory domain (ID), which modulates the activity of the former. The structure of the ID is currently unknown. Results Here we report that the ID contains at least 15 tandem repeats of around 10 amino acids, which we computationally characterize in the human MR and in selected orthologs. This ensemble of repeats seems to have emerged around 450 million years ago, after the divergence of the MR from its close homolog, the glucocorticoid receptor, which does not possess the repeats. The region would have quickly expanded by successive duplication of the repeats stabilizing at its length in human MR shortly after divergence of tetrapoda from bony fishes 400 million years ago. Structural predictions, in combination with molecular dynamics simulations suggest that the repeat ensemble forms a β-solenoid, namely a β-helical fold with a polar core, stabilized by hydrogen-bonded ladders of polar residues. Our 3D-model, in conjunction with previous experimental data, implies a role of the β-helical fold as a scaffold for multiple intra-and inter-molecular interactions and that these interactions are modulated via phosphorylation-dependent conformational changes. Conclusions We, thus, propose that the structure of the repeat ensemble plays an important role in the coordination and sequential interactions of various MR partners and therefore in the functionality and specificity of MR.
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Affiliation(s)
- Metaxia Vlassi
- Protein Structure & Molecular Modeling laboratory, Institute of Biosciences & Applications, National Centre for Scientific Research "Demokritos", 15310 Ag, Paraskevi, Athens, Greece.
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Haridas V, Sadanandan S, Gopalakrishna MVS, Bijesh MB, Verma RP, Chinthalapalli S, Shandilya A. Bispidine as a helix inducing scaffold: examples of helically folded linear peptides. Chem Commun (Camb) 2013; 49:10980-2. [DOI: 10.1039/c3cc45649h] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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14
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Abstract
Oligomers composed of β(3)-amino acid residues and a mixture of α- and β(3)-residues have emerged as proteolytically stable structural mimics of α-helices. An attractive feature of these oligomers is that they adopt defined conformations in short sequences. In this manuscript, we evaluate the impact of β(3)-residues as compared to their α-amino acid analogs in prenucleated helices. Our hydrogen-deuterium exchange results suggest that heterogeneous sequences composed of "αααβ" repeats are conformationally more rigid than the corresponding homogeneous α-peptide helices, with the macrocycle templating the helical conformation having a significant influence.
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Affiliation(s)
- Anupam Patgiri
- Department of Chemistry, New York University, New York, New York 10003, USA
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15
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Akagawa K, Suzuki R, Kudo K. Effect of the Helical Tether of a Resin-Supported Peptide Catalyst for Friedel-Crafts-Type Alkylation in Water. Adv Synth Catal 2012. [DOI: 10.1002/adsc.201100950] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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16
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Miller SE, Kallenbach NR, Arora PS. Reversible α-helix formation controlled by a hydrogen bond surrogate. Tetrahedron 2011; 68:4434-4437. [PMID: 23144512 DOI: 10.1016/j.tet.2011.12.068] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Strategically placed covalent linkages have been shown to stabilize helical conformations in short peptide sequences. Here we report the synthesis of a stabilized α-helix that utilizes an internal disulfide linkage. Structural analysis indicates that the dynamic nature of the disulfide bridge allows for the reversible formation of an α-helix through oxidation and reduction reactions.
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Affiliation(s)
- Stephen E Miller
- Department of Chemistry, New York University, New York, NY 10003, USA
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18
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Downsizing human, bacterial, and viral proteins to short water-stable alpha helices that maintain biological potency. Proc Natl Acad Sci U S A 2010; 107:11686-91. [PMID: 20543141 DOI: 10.1073/pnas.1002498107] [Citation(s) in RCA: 145] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Recombinant proteins are important therapeutics due to potent, highly specific, and nontoxic actions in vivo. However, they are expensive medicines to manufacture, chemically unstable, and difficult to administer with low patient uptake and compliance. Small molecule drugs are cheaper and more bioavailable, but less target-specific in vivo and often have associated side effects. Here we combine some advantages of proteins and small molecules by taking short amino acid sequences that confer potency and selectivity to proteins, and fixing them as small constrained molecules that are chemically and structurally stable and easy to make. Proteins often use short alpha-helices of just 1-4 helical turns (4-15 amino acids) to interact with biological targets, but peptides this short usually have negligible alpha-helicity in water. Here we show that short peptides, corresponding to helical epitopes from viral, bacterial, or human proteins, can be strategically fixed in highly alpha-helical structures in water. These helix-constrained compounds have similar biological potencies as proteins that bear the same helical sequences. Examples are (i) a picomolar inhibitor of Respiratory Syncytial Virus F protein mediated fusion with host cells, (ii) a nanomolar inhibitor of RNA binding to the transporter protein HIV-Rev, (iii) a submicromolar inhibitor of Streptococcus pneumoniae growth induced by quorum sensing pheromone Competence Stimulating Peptide, and (iv) a picomolar agonist of the GPCR pain receptor opioid receptor like receptor ORL-1. This approach can be generally applicable to downsizing helical regions of proteins with broad applications to biology and medicine.
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Affiliation(s)
- Petra Tošovská
- Department of Chemistry, New York University, 100 Washington Square East, New York, New York 10003
| | - Paramjit S. Arora
- Department of Chemistry, New York University, 100 Washington Square East, New York, New York 10003
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