1
|
Li Z, Zheng Y, Yan J, Yan Y, Peng C, Wang Z, Liu H, Liu Y, Zhou Y, Ding M. Self-Assembly of Poly(Amino Acid)s Mediated by Secondary Conformations. Chembiochem 2023; 24:e202300132. [PMID: 37340829 DOI: 10.1002/cbic.202300132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Revised: 06/16/2023] [Accepted: 06/20/2023] [Indexed: 06/22/2023]
Abstract
Self-assembly of block copolymers has recently drawn great attention due to its remarkable performance and wide variety of applications in biomedicine, biomaterials, microelectronics, photoelectric materials, catalysts, etc. Poly(amino acid)s (PAAs), formed by introducing synthetic amino acids into copolymer backbones, are able to fold into different secondary conformations when compared with traditional amphiphilic copolymers. Apart from changing the chemical composition and degree of polymerization of copolymers, the self-assembly behaviors of PAAs could be controlled by their secondary conformations, which are more flexible and adjustable for fine structure tailoring. In this article, we summarize the latest findings on the variables that influence secondary conformations, in particular the regulation of order-to-order conformational changes and the approaches used to manage the self-assembly behaviors of PAAs. These strategies include controlling pH, redox reactions, coordination, light, temperature, and so on. Hopefully, we can provide valuable perspectives that will be useful for the future development and use of synthetic PAAs.
Collapse
Affiliation(s)
- Zifen Li
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, China
| | - Yi Zheng
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, China
| | - Jingyue Yan
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, China
| | - Yue Yan
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, China
| | - Chuan Peng
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, China
| | - Zuojie Wang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, China
| | - Hang Liu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, China
| | - Yang Liu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, China
| | - Yeqiang Zhou
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, China
| | - Mingming Ding
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, China
| |
Collapse
|
2
|
Banerjee A, Dutt M. A hybrid approach for coarse-graining helical peptoids: Solvation, secondary structure, and assembly. J Chem Phys 2023; 158:114105. [PMID: 36948821 DOI: 10.1063/5.0138510] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023] Open
Abstract
Protein mimics such as peptoids form self-assembled nanostructures whose shape and function are governed by the side chain chemistry and secondary structure. Experiments have shown that a peptoid sequence with a helical secondary structure assembles into microspheres that are stable under various conditions. The conformation and organization of the peptoids within the assemblies remains unknown and is elucidated in this study via a hybrid, bottom-up coarse-graining approach. The resultant coarse-grained (CG) model preserves the chemical and structural details that are critical for capturing the secondary structure of the peptoid. The CG model accurately captures the overall conformation and solvation of the peptoids in an aqueous solution. Furthermore, the model resolves the assembly of multiple peptoids into a hemispherical aggregate that is in qualitative agreement with the corresponding results from experiments. The mildly hydrophilic peptoid residues are placed along the curved interface of the aggregate. The composition of the residues on the exterior of the aggregate is determined by two conformations adopted by the peptoid chains. Hence, the CG model simultaneously captures sequence-specific features and the assembly of a large number of peptoids. This multiscale, multiresolution coarse-graining approach could help in predicting the organization and packing of other tunable oligomeric sequences of relevance to biomedicine and electronics.
Collapse
Affiliation(s)
- Akash Banerjee
- Chemical and Biochemical Engineering, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, USA
| | - Meenakshi Dutt
- Chemical and Biochemical Engineering, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, USA
| |
Collapse
|
3
|
Kraichely KN, Clinkscales SE, Hendy CM, Mendoza EA, Parnham S, Giuliano MW. Minimal Increments of Hydrophobic Collapse within the N-Terminus of the Neuropeptide Galanin. Biochemistry 2022; 61:1151-1166. [PMID: 35622960 DOI: 10.1021/acs.biochem.2c00141] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The neuropeptide galanin has a 35-year history as an intriguing target in drug design owing to its implication as a potential anticonvulsant and neuronal trophic factor among many other therapeutically interesting functions including analgesia and mood alteration. In this study, we report the structural characterization of three synthetic fragments of the galanin N-terminus in buffered aqueous solution: hGal(2-12)KK, hGal(1-12)KK, and hGal(1-17)KK. High-field two-dimensional 1H-1H nuclear magnetic resonance (NMR) data were acquired for these fragments and used to derive distance restraints. We further utilized modified hydrogen bonding and dihedral restraints to reflect chemical shift patterns in the data, which revealed the signature of a weakly folded helix. Together, these sets of restraints were used to generate NMR structures of all three fragments, which depict a core of hydrophobic residues that cluster together regardless of the presence of a helical structure, and correspond to residues in the N-terminus of galanin that have been previously shown to be critical for binding its receptors. The helical structure only appears following the inclusion of Gly(1) in the sequence, and at longer sequence lengths, unlike many other peptides, the helix does not propagate. Rather, a few turns of poorly ordered helix appear to be a secondary consequence of clusters of hydrophobic sidechains that are conserved across all of the peptides in this study; the helices themselves appear ordered as a consequence of this clustering, and these clusters compare directly to those observed recently to make contacts between galanin and two of its receptor subtypes. Collapsed hydrophobic residues therefore organize and compose the functional core of human galanin and raise interesting questions about the nature of the conformational order in ligands that bind cell surface receptors.
Collapse
Affiliation(s)
- Katelyn N Kraichely
- Department of Chemistry and Biochemistry, College of Charleston, Charleston, South Carolina 29424, United States
| | - Sarah E Clinkscales
- Department of Chemistry and Biochemistry, College of Charleston, Charleston, South Carolina 29424, United States
| | - Cecilia M Hendy
- Department of Chemistry and Biochemistry, College of Charleston, Charleston, South Carolina 29424, United States
| | - Eric A Mendoza
- Department of Chemistry and Biochemistry, College of Charleston, Charleston, South Carolina 29424, United States
| | - Stuart Parnham
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, South Carolina 29425, United States
| | - Michael W Giuliano
- Department of Chemistry and Biochemistry, College of Charleston, Charleston, South Carolina 29424, United States
| |
Collapse
|
4
|
Computational prediction and validation of specific EmbR binding site on PknH. Synth Syst Biotechnol 2021; 6:429-436. [PMID: 34901481 PMCID: PMC8636726 DOI: 10.1016/j.synbio.2021.11.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2021] [Revised: 10/09/2021] [Accepted: 11/09/2021] [Indexed: 11/24/2022] Open
Abstract
Tuberculosis drug resistance continues to threaten global health but the underline molecular mechanisms are not clear. Ethambutol (EMB), one of the well-known first - line drugs in tuberculosis treatment is, unfortunately, not free from drug resistance problems. Genomic studies have shown that some genetic mutations in Mycobacterium tuberculosis (Mtb) EmbR, and EmbC/A/B genes cause EMB resistance. EmbR-PknH pair controls embC/A/B operon, which encodes EmbC/A/B genes, and EMB interacts with EmbA/B proteins. However, the EmbR binding site on PknH was unknown. We conducted molecular simulation on the EmbR– peptides binding structures and discovered phosphorylated PknH 273–280 (N′-HEALSPDPD-C′) makes β strand with the EmbR FHA domain, as β-MoRF (MoRF; molecular recognition feature) does at its binding site. Hydrogen bond number analysis also supported the peptides' β-MoRF forming activity at the EmbR FHA domain. Also, we discovered that previously known phosphorylation residues might have their chronological order according to the phosphorylation status. The discovery validated that Mtb PknH 273–280 (N′-HEALSDPD-C′) has reliable EmbR binding affinity. This approach is revolutionary in the computer-aided drug discovery field, because it is the first trial to discover the protein-protein interaction site, and find binding partner in nature from this site.
Collapse
|
5
|
Abdildinova A, Kurth MJ, Gong YD. Heterocycles as a Peptidomimetic Scaffold: Solid-Phase Synthesis Strategies. Pharmaceuticals (Basel) 2021; 14:449. [PMID: 34068671 PMCID: PMC8151782 DOI: 10.3390/ph14050449] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 05/04/2021] [Accepted: 05/07/2021] [Indexed: 12/04/2022] Open
Abstract
Peptidomimetics are a privileged class of pharmacophores that exhibit improved physicochemical and biological properties. Solid-phase synthesis is a powerful tool for gaining rapid access to libraries of molecules from small molecules to biopolymers and also is widely used for the synthesis of peptidomimetics. Small molecules including heterocycles serve as a core for hundreds of drugs, including peptidomimetic molecules. This review covers solid-phase synthesis strategies for peptidomimetics molecules based on heterocycles.
Collapse
Affiliation(s)
- Aizhan Abdildinova
- Innovative Drug Library Research Center, Department of Chemistry, College of Science, Dongguk University, 26, 3-ga, Pil-dong, Jung-gu, Seoul 04620, Korea;
| | - Mark J. Kurth
- Department of Chemistry, University of California, Davis, CA 95616, USA
| | - Young-Dae Gong
- Innovative Drug Library Research Center, Department of Chemistry, College of Science, Dongguk University, 26, 3-ga, Pil-dong, Jung-gu, Seoul 04620, Korea;
| |
Collapse
|
6
|
Abstract
Wnt/β-catenin signaling is crucial both in normal embryonic development and throughout the life of an organism. Moreover, aberrant Wnt signaling has been associated with various diseases, especially cancer and fibrosis. Recent research suggests that direct targeting of the β-catenin/BCL9 protein-protein interaction (PPI) is a promising strategy to block the Wnt pathway. Progress in understanding the cocrystalline complex and mechanism of action of the β-catenin/BCL9 interaction facilitates the discovery process of its inhibitors, but only a few inhibitors have been reported. In this review, the discovery and development of β-catenin/BCL9 PPI inhibitors in the areas of drug design, structure-activity relationships and biological and biochemical properties are summarized. In addition, perspectives for the future development of β-catenin/BCL9 PPI inhibitors are explored.
Collapse
|
7
|
A novel peptide antagonist of the human growth hormone receptor. J Biol Chem 2021; 296:100588. [PMID: 33774052 PMCID: PMC8086144 DOI: 10.1016/j.jbc.2021.100588] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 03/09/2021] [Accepted: 03/23/2021] [Indexed: 12/11/2022] Open
Abstract
Excess circulating human growth hormone (hGH) in vivo is linked to metabolic and growth disorders such as cancer, diabetes, and acromegaly. Consequently, there is considerable interest in developing antagonists of hGH action. Here, we present the design, synthesis, and characterization of a 16-residue peptide (site 1-binding helix [S1H]) that inhibits hGH-mediated STAT5 phosphorylation in cultured cells. S1H was designed as a direct sequence mimetic of the site 1 mini-helix (residues 36-51) of wild-type hGH and acts by inhibiting the interaction of hGH with the human growth hormone receptor (hGHR). In vitro studies indicated that S1H is stable in human serum and can adopt an α-helix in solution. Our results also show that S1H mitigates phosphorylation of STAT5 in cells co-treated with hGH, reducing intracellular STAT5 phosphorylation levels to those observed in untreated controls. Furthermore, S1H was found to attenuate the activity of the hGHR and the human prolactin receptor, suggesting that this peptide acts as an antagonist of both lactogenic and somatotrophic hGH actions. Finally, we used alanine scanning to determine how discrete amino acids within the S1H sequence contribute to its structural organization and biological activity. We observed a strong correlation between helical propensity and inhibitory effect, indicating that S1H-mediated antagonism of the hGHR is largely dependent on the ability for S1H to adopt an α-helix. Taken together, these results show that S1H not only acts as a novel peptide-based antagonist of the hGHR but can also be applied as a chemical tool to study the molecular nature of hGH-hGHR interactions.
Collapse
|
8
|
Besenius P, Zengerling L, Kemper B, Hellmich UA. Synthesis and Structural Stability of α-Helical Gold(I)-Metallopeptidesy. Synlett 2021. [DOI: 10.1055/a-1290-8412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
AbstractThe synthesis of hexa- and dodecapeptides functionalized with two Au(I)–phosphine complexes is reported. The high stability of the Au(I)–phosphine bond allowed orthogonal peptide-protecting-group chemistry, even when using hard Lewis acids like boron tribromide. This enabled the preparation of an Fmoc-protected lysine derivative carrying the Au(I) complex in a side chain, which was used in standard Fmoc-based solid-phase peptide synthesis protocols. Alanine and leucine repeats in the metallododecapeptide formed α-helical secondary structures in 2,2,2-trifluoroethanol–H2O and 1,1,1,3,3,3-hexafluoroisopropanol–H2O mixtures with high thermal stability, as shown by temperature-dependent CD spectroscopy studies.
Collapse
Affiliation(s)
- Pol Besenius
- Department of Chemistry, Johannes Gutenberg-University Mainz
| | | | - Benedict Kemper
- Department of Chemistry, Johannes Gutenberg-University Mainz
| | - Ute A. Hellmich
- Department of Chemistry, Johannes Gutenberg-University Mainz
- Centre for Biomolecular Magnetic Resonance (BMRZ), Goethe-University Frankfurt
| |
Collapse
|
9
|
Structure-based design, synthesis, and evaluation of the biological activity of novel phosphoroorganic small molecule IAP antagonists. Invest New Drugs 2020; 38:1350-1364. [PMID: 32270379 PMCID: PMC7497679 DOI: 10.1007/s10637-020-00923-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Accepted: 03/09/2020] [Indexed: 12/22/2022]
Abstract
One of the strategies employed by novel anticancer therapies is to put the process of apoptosis back on track by blocking the interaction between inhibitor of apoptosis proteins (IAPs) and caspases. The activity of caspases is modulated by the caspases themselves in a caspase/procaspase proteolytic cascade and by their interaction with IAPs. Caspases can be released from the inhibitory influence of IAPs by proapoptotic proteins such as secondary mitochondrial activator of caspases (Smac) that share an IAP binding motif (IBM). The main purpose of the present study was the design and synthesis of phosphorus-based peptidyl antagonists of IAPs that mimic the endogenous Smac protein, which blocks the interaction between IAPs and caspases. Based on the structure of the IAP antagonist and recently reported thiadiazole derivatives, we designed and evaluated the biochemical properties of a series of phosphonic peptides bearing the N-Me-Ala-Val/Chg-Pro-OH motif (Chg: cyclohexylglycine). The ability of the obtained compounds to interact with the binding groove of the X-linked inhibitor of apoptosis protein baculovirus inhibitor of apoptosis protein repeat (XIAP BIR3) domain was examined by a fluorescence polarization assay, while their potential to induce autoubiquitination followed by proteasomal degradation of cellular IAP1 was examined using the MDA-MB-231 breast cancer cell line. The highest potency against BIR3 was observed among peptides containing C-terminal phosphonic phenylalanine analogs, which displayed nanomolar Ki values. Their antiproliferative potential as well as their proapoptotic action, manifested by an increase in caspase-3 activity, was examined using various cell lines.
Collapse
|
10
|
Negi A, Reilly CO, Jarikote DV, Zhou J, Murphy PV. Multi-targeting protein-protein interaction inhibitors: Evolution of macrocyclic ligands with embedded carbohydrates (MECs) to improve selectivity. Eur J Med Chem 2019; 176:292-309. [PMID: 31112891 DOI: 10.1016/j.ejmech.2019.04.064] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Revised: 04/01/2019] [Accepted: 04/24/2019] [Indexed: 10/26/2022]
Abstract
Compounds targeting multiple proteins can have synergistic effects and are therefore of interest in medicinal chemistry. At the same time, inhibiting protein-protein interactions (PPI) is increasingly desired in the treatment of disorders or diseases. The development of non-peptidomimetic inhibitors is still a challenge. Herein we investigate macrocyclic scaffolds with one or two embedded carbohydrates (MECs) that present amino acid side chains, or related isosteres, as pharmacophoric groups. Firstly, retroscreening of the previously reported eannaphane-40 (E40, 40), a MEC presenting two pharmacophoric groups, against a set of 55 receptor-subtypes led to a finding of sub-micromolar inhibitory activity for E40 against three serotonergic isoforms (5HT1A/2A/2B) as well as the Na+ channel and the NK-2 receptor. We synthesised MECs with an additional pharmacophoric group compared to E40, with a view to identifying compounds where the selectivity profile was altered among the protein hits from the retroscreening. MECs were produced based on scaffolds with two monosaccharide residues, leading to the incorporation of a third pharmacophoric group. Later, homology models were prepared for four proteins (5HT1A, 5HT2A, NK2 and site-2 of the sodium channel) whose 3D structure is unknown. Inverse docking of the synthesised compounds led to the selection of a new MEC (MEC-B) for protein binding assays. MEC-B was found to have its selectivity profile modulated, in line with docking prediction, compared to E40. MEC-B is dual inhibitor of both 5-HT1A and the sodium channel with improved selectivity for these proteins compared to 5-HT2A/2B/2C, 5-HT transporter and NK2 receptor. Thus, a new multitargeting compound, with an improved selectivity profile was identified, based on a MEC peptidomimetic scaffold.
Collapse
Affiliation(s)
- Arvind Negi
- School of Chemistry, National University of Ireland Galway, University Road, Galway, H91 TK33, Ireland
| | - Ciaran O Reilly
- School of Chemistry, National University of Ireland Galway, University Road, Galway, H91 TK33, Ireland
| | - Dilip V Jarikote
- School of Chemistry, National University of Ireland Galway, University Road, Galway, H91 TK33, Ireland
| | - Jian Zhou
- School of Chemistry, National University of Ireland Galway, University Road, Galway, H91 TK33, Ireland
| | - Paul V Murphy
- School of Chemistry, National University of Ireland Galway, University Road, Galway, H91 TK33, Ireland.
| |
Collapse
|
11
|
Taechalertpaisarn J, Lyu RL, Arancillo M, Lin CM, Perez LM, Ioerger TR, Burgess K. Correlations between secondary structure- and protein-protein interface-mimicry: the interface mimicry hypothesis. Org Biomol Chem 2019; 17:3267-3274. [PMID: 30847453 PMCID: PMC6863600 DOI: 10.1039/c9ob00204a] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
An active segment of the research community designing small molecules ("minimalist mimics" of peptide fragments) to interfere with protein-protein interactions have based their studies on an implicit hypothesis. Here we refer to this as the Secondary Structure Hypothesis, that might be defined as, "If a small molecule can orient amino acid side-chains in directions that resemble side-chains of the parent secondary structure at the interface, then that small molecule is a candidate to perturb the protein-protein interaction". Rigorous tests of this hypothesis require co-crystallization of minimalist mimics with protein receptors, and comparison of the bound conformations with the interface secondary structures they were designed to resemble. Unfortunately, to the best of our knowledge, there is no such analysis in the literature, and it is unlikely that enough examples will emerge in the near future to test the hypothesis. Research described here was designed to challenge this hypothesis from a different perspective. In a previous study, preferred conformations of a series of novel minimalist mimics were simulated then systematically overlaid on >240 000 crystallographically characterized protein-protein interfaces. Select data from that overlay procedure revealed chemotypes that overlay side chains on various PPI interfaces with a relatively high frequency of occurrence. The first aim of this work was to determine if good secondary structure mimics overlay frequently on PPI interfaces. The second aim of this work was to determine if overlays of preferred conformers at interface regions involve secondary structures. Thus situations where these conformations overlaid extremely well on PPI interfaces were analyzed to determine if secondary structures featured the PPI regions where these molecules overlaid in the previous study. Combining conclusions from these two studies enabled us to formulate a hypothesis that is complementary to the Secondary Structure Hypothesis, but, unlike this, is supported by abundant data. We call this the Interface Mimicry Hypothesis.
Collapse
Affiliation(s)
- Jaru Taechalertpaisarn
- Department of Chemistry, Texas A & M University, Box 30012, College Station, TX 77842-3012, USA.
| | | | | | | | | | | | | |
Collapse
|
12
|
Yu J, Shi S, Zhang F, Chen G, Cao M. PredGly: predicting lysine glycation sites for Homo sapiens based on XGboost feature optimization. Bioinformatics 2018; 35:2749-2756. [DOI: 10.1093/bioinformatics/bty1043] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Revised: 12/13/2018] [Accepted: 12/20/2018] [Indexed: 01/22/2023] Open
Abstract
Abstract
Motivation
Protein glycation is a familiar post-translational modification (PTM) which is a two-step non-enzymatic reaction. Glycation not only impairs the function but also changes the characteristics of the proteins so that it is related to many human diseases. It is still much more difficult to systematically detect glycation sites due to the glycated residues without crucial patterns. Computational approaches, which can filter supposed sites prior to experimental verification, can extremely increase the efficiency of experiment work. However, the previous lysine glycation prediction method uses a small number of training datasets. Hence, the model is not generalized or pervasive.
Results
By searching from a new database, we collected a large dataset in Homo sapiens. PredGly, a novel software, can predict lysine glycation sites for H.sapiens, which was developed by combining multiple features. In addition, XGboost was adopted to optimize feature vectors and to improve the model performance. Through comparing various classifiers, support vector machine achieved an optimal performance. On the basis of a new independent test set, PredGly outperformed other glycation tools. It suggests that PredGly can provide more instructive guidance for further experimental research of lysine glycation.
Availability and implementation
https://github.com/yujialinncu/PredGly
Supplementary information
Supplementary data are available at Bioinformatics online.
Collapse
Affiliation(s)
- Jialin Yu
- Department of Mathematics and Numerical Simulation and High-Performance Computing Laboratory, School of Sciences, Nanchang University, Nanchang, China
| | - Shaoping Shi
- Department of Mathematics and Numerical Simulation and High-Performance Computing Laboratory, School of Sciences, Nanchang University, Nanchang, China
| | - Fang Zhang
- Department of Mathematics and Numerical Simulation and High-Performance Computing Laboratory, School of Sciences, Nanchang University, Nanchang, China
| | - Guodong Chen
- Department of Mathematics and Numerical Simulation and High-Performance Computing Laboratory, School of Sciences, Nanchang University, Nanchang, China
| | - Man Cao
- Department of Mathematics and Numerical Simulation and High-Performance Computing Laboratory, School of Sciences, Nanchang University, Nanchang, China
| |
Collapse
|
13
|
Amori P, Di Nardo V, Vitiello G, Franca K, Hercogova J, Wollina U, Daaboul F, Tchernev G, Lotti T. Primavera: A new therapeutical approach to vulvo-vaginal atrophy. Dermatol Ther 2018; 31:e12678. [DOI: 10.1111/dth.12678] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Accepted: 07/12/2018] [Indexed: 11/30/2022]
Affiliation(s)
| | | | | | - Katlein Franca
- Dermatology & Cutaneous Surgery; University of Miami School of Medicine; Miami Florida
| | - Jana Hercogova
- Department of Dermatovenerology; 2nd Faculty of Medicine, Charles University; Prague Czech Republic
| | - Uwe Wollina
- Dermatology, Venereology and Allergology; Academic Teaching Hospital Dresden-Friedrichstadt; Dreseden Germany
| | - Farah Daaboul
- Institute of Dermatological and Regenerative Sciences; Florence Italy
| | - Georgi Tchernev
- Dermatology and Venereology; Medical Institute of the Ministry of Interior; Sofia Bulgaria
| | | |
Collapse
|
14
|
Barrera NF, Melgarejo LM, Cruz-Gallego M, Cortés LJ, Guzmán F, Calvo JC. Conformationally Restricted Peptides from Rice Proteins Elicit Antibodies That Recognize the Corresponding Native Protein in ELISA Assays. Molecules 2018; 23:molecules23092262. [PMID: 30189617 PMCID: PMC6225240 DOI: 10.3390/molecules23092262] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Revised: 08/29/2018] [Accepted: 09/01/2018] [Indexed: 01/13/2023] Open
Abstract
The rice hoja blanca virus (RHBV), transmitted by the planthopper insect Tagosodes orizicolus, is a disease that attacks rice and generates significant production losses in Colombia. Fedearroz 2000 and Colombia I commercial rice varieties, which have different resistance levels to the disease, were selected in this study. To identify proteins associated to the insect and virus signaling, a comparative proteomics study was performed. By comparing proteomic profiles, between virus-infected and control group plants in two-dimensional electrophoresis, proteins exhibiting significant changes in abundance were found. In another test, peptide dendrimers containing sequences conformationally restricted to α-helix from four of those rice proteins were synthesized. In the experiment, sera from mice inoculated with peptide dendrimers could recognize the corresponding native protein in ELISA assays. Reported comparative proteomic results provide new insights into the molecular mechanisms of plant response to the RHBV and comprehensive tools for the analysis of new crop varieties. Besides, results from conformational peptide dendrimer approach are promising and show that it is feasible to detect proteins as markers, and may have biological applications by decreasing the susceptibility to proteolytic degradation.
Collapse
Affiliation(s)
- Nubia F Barrera
- Doctorado en Biotecnología, Universidad Nacional de Colombia, Carrera 30 No. 45-03, Edificio 224, Bogotá 110111, Colombia.
- Grupo Proteoma UD, Facultad de Ciencias y Educación, Universidad Distrital Francisco José de Caldas, Carrera 4 No. 26B-54, Bogotá 110111, Colombia.
| | - Luz M Melgarejo
- Laboratorio de Fisiología y Bioquímica Vegetal, Departamento de Biología, Universidad Nacional de Colombia, Carrera 30 No. 45-03, Edificio 421, Bogotá 110111, Colombia.
| | - Maribel Cruz-Gallego
- Centro Internacional de Agricultura Tropical, CIAT, Fondo Latinoamericano para Arroz de Riego, FLAR, Palmira, Valle 763537, Colombia.
| | - Lina Jimena Cortés
- Núcleo de Biotecnología de Curauma, Pontificia Universidad Católica de Valparaíso, Valparaíso 2373223, Chile.
| | - Fanny Guzmán
- Núcleo de Biotecnología de Curauma, Pontificia Universidad Católica de Valparaíso, Valparaíso 2373223, Chile.
| | - Julio C Calvo
- Grupo Proteoma UD, Facultad de Ciencias y Educación, Universidad Distrital Francisco José de Caldas, Carrera 4 No. 26B-54, Bogotá 110111, Colombia.
| |
Collapse
|
15
|
Abdildinova A, Yang SJ, Gong YD. Solid-phase parallel synthesis of 1,3,4-oxadiazole based peptidomimetic library as a potential modulator of protein-protein interactions. Tetrahedron 2018. [DOI: 10.1016/j.tet.2017.12.055] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
|
16
|
Wang SH, Yu J. Structure-based design for binding peptides in anti-cancer therapy. Biomaterials 2017; 156:1-15. [PMID: 29182932 DOI: 10.1016/j.biomaterials.2017.11.024] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Revised: 10/30/2017] [Accepted: 11/21/2017] [Indexed: 12/18/2022]
Abstract
The conventional anticancer therapeutics usually lack cancer specificity, leading to damage of normal tissues that patients find hard to tolerate. Ideally, anticancer therapeutics carrying payloads of drugs equipped with cancer targeting peptides can act like "guided missiles" with the capacity of targeted delivery toward many types of cancers. Peptides are amenable for conjugation to nano drugs for functionalization, thereby improving drug delivery and cellular uptake in cancer-targeting therapies. Peptide drugs are often more difficult to design through molecular docking and in silico analysis than small molecules, because peptide structures are more flexible, possess intricate molecular conformations, and undergo complex interactions. In this review, the development and application of strategies for structure-based design of cancer-targeting peptides against GRP78 are discussed. This Review also covers topics related to peptide pharmacokinetics and targeting delivery, including molecular docking studies, features that provide advantages for in vivo use, and properties that influence the cancer-targeting ability. Some advanced technologies and special peptides that can overcome the pharmacokinetic challenges have also been included.
Collapse
Affiliation(s)
- Sheng-Hung Wang
- Institute of Stem Cell and Translational Cancer Research, Chang Gung Memorial Hospital at Linkou, Chang Gung University, Taoyuan 333, Taiwan
| | - John Yu
- Institute of Stem Cell and Translational Cancer Research, Chang Gung Memorial Hospital at Linkou, Chang Gung University, Taoyuan 333, Taiwan; Institute of Cellular and Organismic Biology, Academia Sinica, Taipei, Taiwan.
| |
Collapse
|
17
|
Li Y, Zhang Y, Yang J, Yang J. Polypeptide-participating complex nanoparticles with improved salt-tolerance as excellent candidates for intelligent insulin delivery. RSC Adv 2017. [DOI: 10.1039/c7ra00418d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The strategy of introducing synthetic polypeptides with hierarchical ordered structures into glucose-responsive materials is reported in this study to achieve self-regulated release of insulin under physiological salt concentration.
Collapse
Affiliation(s)
- Yuqiang Li
- State Key Laboratory of Chemical Resource Engineering
- Beijing Key Laboratory of Bioprocess
- College of Life Science and Technology
- Beijing University of Chemical Technology
- Beijing 100029
| | - Yunyan Zhang
- State Key Laboratory of Chemical Resource Engineering
- Beijing Key Laboratory of Bioprocess
- College of Life Science and Technology
- Beijing University of Chemical Technology
- Beijing 100029
| | - Junjiao Yang
- College of Science
- Beijing University of Chemical Technology
- Beijing 100029
- China
| | - Jing Yang
- State Key Laboratory of Chemical Resource Engineering
- Beijing Key Laboratory of Bioprocess
- College of Life Science and Technology
- Beijing University of Chemical Technology
- Beijing 100029
| |
Collapse
|
18
|
Aparicio F, Faour L, Allain M, Canevet D, Sallé M. A pyrene-functionalized foldamer: structural impact and recognition properties supported by donor–acceptor interactions. Chem Commun (Camb) 2017; 53:12028-12031. [DOI: 10.1039/c7cc07253h] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An electroactive and luminescent foldamer proved to have an original hybridized structure and interacts with electron-poor guests.
Collapse
Affiliation(s)
- F. Aparicio
- Laboratoire MOLTECH-Anjou
- Université d’Angers
- 2 Bd Lavoisier
- 49045 ANGERS Cedex
- France
| | - L. Faour
- Laboratoire MOLTECH-Anjou
- Université d’Angers
- 2 Bd Lavoisier
- 49045 ANGERS Cedex
- France
| | - M. Allain
- Laboratoire MOLTECH-Anjou
- Université d’Angers
- 2 Bd Lavoisier
- 49045 ANGERS Cedex
- France
| | - D. Canevet
- Laboratoire MOLTECH-Anjou
- Université d’Angers
- 2 Bd Lavoisier
- 49045 ANGERS Cedex
- France
| | - M. Sallé
- Laboratoire MOLTECH-Anjou
- Université d’Angers
- 2 Bd Lavoisier
- 49045 ANGERS Cedex
- France
| |
Collapse
|
19
|
Tennyson RL, Walker SN, Ikeda T, Harris RS, Kennan AJ, McNaughton BR. Helix-Grafted Pleckstrin Homology Domains Suppress HIV-1 Infection of CD4-Positive Cells. Chembiochem 2016; 17:1945-1950. [PMID: 27441758 DOI: 10.1002/cbic.201600329] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2016] [Indexed: 12/26/2022]
Abstract
The size, functional group diversity and three-dimensional structure of proteins often allow these biomolecules to bind disease-relevant structures that challenge or evade small-molecule discovery. Additionally, folded proteins are often much more stable in biologically relevant environments compared to their peptide counterparts. We recently showed that helix-grafted display-extensive resurfacing and elongation of an existing solvent-exposed helix in a pleckstrin homology (PH) domain-led to a new protein that binds a surrogate of HIV-1 gp41, a validated target for inhibition of HIV-1 entry. Expanding on this work, we prepared a number of human-derived helix-grafted-display PH domains of varied helix length and measured properties relevant to therapeutic and basic research applications. In particular, we showed that some of these new reagents expressed well as recombinant proteins in Escherichia coli, were relatively stable in human serum, bound a mimic of pre-fusogenic HIV-1 gp41 in vitro and in complex biological environments, and significantly lowered the incidence of HIV-1 infection of CD4-positive cells.
Collapse
Affiliation(s)
- Rachel L Tennyson
- Department of Chemistry, Colorado State University, Fort Collins, CO, 80523, USA
| | - Susanne N Walker
- Department of Biochemistry and Molecular Biology, Colorado State University, Fort Collins, Colorado, 80523, USA
| | - Terumasa Ikeda
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, Minnesota, 55455, USA
| | - Reuben S Harris
- Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota, Minneapolis, Minnesota, 55455, USA.,Howard Hughes Medical Institute, University of Minnesota, Minneapolis, Minnesota, 55455, USA
| | - Alan J Kennan
- Department of Chemistry, Colorado State University, Fort Collins, CO, 80523, USA.
| | - Brian R McNaughton
- Department of Chemistry, Colorado State University, Fort Collins, CO, 80523, USA. .,Department of Biochemistry and Molecular Biology, Colorado State University, Fort Collins, Colorado, 80523, USA.
| |
Collapse
|
20
|
Lammi C, Zanoni C, Aiello G, Arnoldi A, Grazioso G. Lupin Peptides Modulate the Protein-Protein Interaction of PCSK9 with the Low Density Lipoprotein Receptor in HepG2 Cells. Sci Rep 2016; 6:29931. [PMID: 27424515 PMCID: PMC4947907 DOI: 10.1038/srep29931] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Accepted: 06/23/2016] [Indexed: 12/20/2022] Open
Abstract
Proprotein convertase subtilisin/kexin type 9 (PCSK9) has been recently identified as a new useful target for hypercholesterolemia treatment. This work demonstrates that natural peptides, deriving from the hydrolysis of lupin protein and absorbable at intestinal level, are able to inhibit the protein-protein interaction between PCSK9 and the low density lipoprotein receptor (LDLR). In order to sort out the best potential inhibitors among these peptides, a refined in silico model of the PCSK9/LDLR interaction was developed. Docking, molecular dynamics (MD) simulations and peptide binding energy estimations, by MM-GBSA approach, permitted to select the two best candidates among tested peptides that were synthesized and evaluated for their inhibitory activity. The most active was P5 that induced a concentration dependent inhibition of the PCSK9-LDLR binding, with an IC50 value equal to 1.6 ± 0.33 μM. Tested at a 10 μM concentration, this peptide increased by 66 ± 21.4% the ability of HepG2 cells to take up LDL from the extracellular environment.
Collapse
Affiliation(s)
- Carmen Lammi
- Department of Pharmaceutical Sciences, University of Milan, Milan, Italy
| | - Chiara Zanoni
- Department of Pharmaceutical Sciences, University of Milan, Milan, Italy
| | - Gilda Aiello
- Department of Pharmaceutical Sciences, University of Milan, Milan, Italy
| | - Anna Arnoldi
- Department of Pharmaceutical Sciences, University of Milan, Milan, Italy
| | - Giovanni Grazioso
- Department of Pharmaceutical Sciences, University of Milan, Milan, Italy
| |
Collapse
|
21
|
Ruiz-Gómez G, Hawkins JC, Philipp J, Künze G, Wodtke R, Löser R, Fahmy K, Pisabarro MT. Rational Structure-Based Rescaffolding Approach to De Novo Design of Interleukin 10 (IL-10) Receptor-1 Mimetics. PLoS One 2016; 11:e0154046. [PMID: 27123592 PMCID: PMC4849758 DOI: 10.1371/journal.pone.0154046] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Accepted: 04/07/2016] [Indexed: 12/25/2022] Open
Abstract
Tackling protein interfaces with small molecules capable of modulating protein-protein interactions remains a challenge in structure-based ligand design. Particularly arduous are cases in which the epitopes involved in molecular recognition have a non-structured and discontinuous nature. Here, the basic strategy of translating continuous binding epitopes into mimetic scaffolds cannot be applied, and other innovative approaches are therefore required. We present a structure-based rational approach involving the use of a regular expression syntax inspired in the well established PROSITE to define minimal descriptors of geometric and functional constraints signifying relevant functionalities for recognition in protein interfaces of non-continuous and unstructured nature. These descriptors feed a search engine that explores the currently available three-dimensional chemical space of the Protein Data Bank (PDB) in order to identify in a straightforward manner regular architectures containing the desired functionalities, which could be used as templates to guide the rational design of small natural-like scaffolds mimicking the targeted recognition site. The application of this rescaffolding strategy to the discovery of natural scaffolds incorporating a selection of functionalities of interleukin-10 receptor-1 (IL-10R1), which are relevant for its interaction with interleukin-10 (IL-10) has resulted in the de novo design of a new class of potent IL-10 peptidomimetic ligands.
Collapse
Affiliation(s)
- Gloria Ruiz-Gómez
- Structural Bioinformatics, BIOTEC TU Dresden, Tatzberg, Dresden, Germany
- * E-mail: (GRG); (MTB)
| | - John C. Hawkins
- Structural Bioinformatics, BIOTEC TU Dresden, Tatzberg, Dresden, Germany
| | - Jenny Philipp
- Helmholtz-Zentrum Dresden Rossendorf, Institute of Resource Ecology, Dresden, Germany
| | - Georg Künze
- Institute of Medical Physics and Biophysics, University of Leipzig, Leipzig, Germany
| | - Robert Wodtke
- Helmholtz-Zentrum Dresden Rossendorf, Institute of Radiopharmaceutical Cancer Research, Dresden, Germany
| | - Reik Löser
- Helmholtz-Zentrum Dresden Rossendorf, Institute of Radiopharmaceutical Cancer Research, Dresden, Germany
| | - Karim Fahmy
- Helmholtz-Zentrum Dresden Rossendorf, Institute of Resource Ecology, Dresden, Germany
| | - M. Teresa Pisabarro
- Structural Bioinformatics, BIOTEC TU Dresden, Tatzberg, Dresden, Germany
- * E-mail: (GRG); (MTB)
| |
Collapse
|
22
|
Ingole TS, Vijayadas KN, Chaitanya KN, Kotmale AS, Gawade RL, Gonnade RG, Rajamohanan PR, Sanjayan GJ. Disruption of Native β-Turns: Consequence of Folding Competition between Native and Orthanilic Acid Proline-BasedPseudoβ-Turn. European J Org Chem 2016. [DOI: 10.1002/ejoc.201501558] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
|
23
|
Bag SS, Jana S, Pradhan MK, Pal S. Trichromophoric pentapeptide: impact of β-sheet conformation on dual path to excimer emission and sensing of BSA. RSC Adv 2016. [DOI: 10.1039/c6ra14084j] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
We established dual mechanisms for excimer emission-either via FRET or direct excitation of a FRET acceptor- in a conceptually novel trichromophoric pentapeptide which serves as an effective fluorescence light-up probe for protein–peptide interaction.
Collapse
Affiliation(s)
- Subhendu Sekhar Bag
- Bioorganic Chemistry Laboratory
- Department of Chemistry
- Indian Institute of Technology Guwahati
- North Guwhati-781039
- India
| | - Subhashis Jana
- Bioorganic Chemistry Laboratory
- Department of Chemistry
- Indian Institute of Technology Guwahati
- North Guwhati-781039
- India
| | - Manoj Kumar Pradhan
- Bioorganic Chemistry Laboratory
- Department of Chemistry
- Indian Institute of Technology Guwahati
- North Guwhati-781039
- India
| | - Sunit Pal
- Bioorganic Chemistry Laboratory
- Department of Chemistry
- Indian Institute of Technology Guwahati
- North Guwhati-781039
- India
| |
Collapse
|
24
|
Stucchi M, Grazioso G, Lammi C, Manara S, Zanoni C, Arnoldi A, Lesma G, Silvani A. Disrupting the PCSK9/LDLR protein–protein interaction by an imidazole-based minimalist peptidomimetic. Org Biomol Chem 2016; 14:9736-9740. [DOI: 10.1039/c6ob01642a] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report on a tetraimidazole-based β-strand minimalist peptidomimetic as a novel inhibitor of LDLR–PCSK9 protein–protein interaction, a promising target for hypercholesterolemia.
Collapse
Affiliation(s)
- Mattia Stucchi
- Dipartimento di Chimica
- Università degli Studi di Milano
- 20133 Milano
- Italy
- Dipartimento di Scienze della Vita
| | - Giovanni Grazioso
- Dipartimento di Scienze Farmaceutiche
- Università degli Studi di Milano
- 20133 Milano
- Italy
| | - Carmen Lammi
- Dipartimento di Scienze Farmaceutiche
- Università degli Studi di Milano
- 20133 Milano
- Italy
| | - Silvia Manara
- Dipartimento di Scienze Farmaceutiche
- Università degli Studi di Milano
- 20133 Milano
- Italy
| | - Chiara Zanoni
- Dipartimento di Scienze Farmaceutiche
- Università degli Studi di Milano
- 20133 Milano
- Italy
| | - Anna Arnoldi
- Dipartimento di Scienze Farmaceutiche
- Università degli Studi di Milano
- 20133 Milano
- Italy
| | - Giordano Lesma
- Dipartimento di Chimica
- Università degli Studi di Milano
- 20133 Milano
- Italy
| | - Alessandra Silvani
- Dipartimento di Chimica
- Università degli Studi di Milano
- 20133 Milano
- Italy
| |
Collapse
|
25
|
Nevola L, Giralt E. Modulating protein-protein interactions: the potential of peptides. Chem Commun (Camb) 2015; 51:3302-15. [PMID: 25578807 DOI: 10.1039/c4cc08565e] [Citation(s) in RCA: 187] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Protein-protein interactions (PPIs) have emerged as important and challenging targets in chemical biology and medicinal chemistry. The main difficulty encountered in the discovery of small molecule modulators derives from the large contact surfaces involved in PPIs when compared with those that participate in protein-small molecule interactions. Because of their intrinsic features, peptides can explore larger surfaces and therefore represent a useful alternative to modulate PPIs. The use of peptides as therapeutics has been held back by their instability in vivo and poor cell internalization. However, more than 200 peptide drugs and homologous compounds (proteins or antibodies) containing peptide bonds are (or have been) on the market, and many alternatives are now available to tackle these limitations. This review will focus on the latest progress in the field, spanning from "lead" identification methods to binding evaluation techniques, through an update of the most successful examples described in the literature.
Collapse
Affiliation(s)
- Laura Nevola
- Institute for Research in Biomedicine (IRB Barcelona), C/Baldiri Reixac 10, 08028 Barcelona, Spain.
| | | |
Collapse
|
26
|
Rizeq N, Georgiades SN. Linear and Branched Pyridyl-Oxazole Oligomers: Synthesis and Circular Dichroism Detectable Effect on c-Myc G-Quadruplex Helicity. European J Org Chem 2015. [DOI: 10.1002/ejoc.201501269] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
|
27
|
Silva AF, Torres MDT, Silva LDS, Alves FL, Pinheiro AADS, Miranda A, Capurro ML, Oliveira VX. New linear antiplasmodial peptides related to angiotensin II. Malar J 2015; 14:433. [PMID: 26537730 PMCID: PMC4634797 DOI: 10.1186/s12936-015-0974-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2015] [Accepted: 10/28/2015] [Indexed: 01/18/2023] Open
Abstract
Background Antiplasmodial activities of angiotensin II and its analogues have been extensively investigated in Plasmodium gallinaceum and Plasmodium falciparum parasite species. Due to its vasoconstrictor property angiotensin II cannot be used as an anti-malarial drug. Methods This work presents the solid-phase syntheses and liquid chromatography and mass spectrometry characterization of ten linear peptides related to angiotensin II against mature P. gallinaceum sporozoites and erythrocyte invasion by P. falciparum. Conformational analyses were performed by circular dichroism. IC50 assays were performed to identify the ideal concentration used on the biological tests and haemolytical erythrocytic assays were made to verify the viability of the biological experiments. The contractile responses of the analogues were made to evaluate if they are promising candidates to be applied as antiplasmodial drugs. Results The results indicate two short-peptides constituted by hydrophobic residues (5 and 6) with antiplasmodial activity in these models, 89 and 94 % of biological activity against P. gallinaceum sporozoite, respectively, and around 50 % of activity against P. falciparum. Circular dichroism spectra suggested that all the peptides adopted β-turn conformation in different solutions, except peptide 3. Besides the biological assays IC50, the haemolysis assays and contractile response activities were applied for peptides 5 and 6, which did not present expressive results. Conclusions The hydrophobic portion and the arginine, tyrosine, proline, and phenylalanine, when present on peptide primary sequence, tend to increase the antiplasmodial activity. This class of peptides can be explored, as anti-malarial drugs, after in vivo model tests.The most active peptide presented 94 % activity on P. gallinaceum sporozoites and 53 % inhibited P. falciparum ring forms invasion ![]() Electronic supplementary material The online version of this article (doi:10.1186/s12936-015-0974-y) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Adriana Farias Silva
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, Rua Santa Adélia, 166, Santo André, SP, 09210-170, Brazil.
| | - Marcelo Der Torossian Torres
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, Rua Santa Adélia, 166, Santo André, SP, 09210-170, Brazil.
| | - Leandro de Souza Silva
- Instituto de Biofísica Carlos Chagas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil.
| | - Flávio Lopes Alves
- Departamento de Biofísica, Universidade Federal de São Paulo, São Paulo, SP, Brazil.
| | - Ana Acácia de Sá Pinheiro
- Instituto de Biofísica Carlos Chagas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil.
| | - Antonio Miranda
- Departamento de Biofísica, Universidade Federal de São Paulo, São Paulo, SP, Brazil.
| | - Margareth Lara Capurro
- Departamento de Parasitologia, Instituto de Ciências Biomédicas II, Universidade de São Paulo, São Paulo, SP, Brazil.
| | - Vani Xavier Oliveira
- Centro de Ciências Naturais e Humanas, Universidade Federal do ABC, Rua Santa Adélia, 166, Santo André, SP, 09210-170, Brazil.
| |
Collapse
|
28
|
Library construction, selection and modification strategies to generate therapeutic peptide-based modulators of protein-protein interactions. Future Med Chem 2015; 6:2073-92. [PMID: 25531969 DOI: 10.4155/fmc.14.134] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
In the modern age of proteomics, vast numbers of protein-protein interactions (PPIs) are being identified as causative agents in pathogenesis, and are thus attractive therapeutic targets for intervention. Although traditionally regarded unfavorably as druggable agents relative to small molecules, peptides in recent years have gained considerable attention. Their previous dismissal had been largely due to the susceptibility of unmodified peptides to the barriers and pressures exerted by the circulation, immune system, proteases, membranes and other stresses. However, recent advances in high-throughput peptide isolation techniques, as well as a huge variety of direct modification options and approaches to allow targeted delivery, mean that peptides and their mimetics can now be designed to circumvent many of these traditional barriers. As a result, an increasing number of peptide-based drugs are reaching clinical trials and patients beyond.
Collapse
|
29
|
Mutaf OF, Kishimura A, Mochida Y, Kim A, Kataoka K. Induction of Secondary Structure through Micellization of an Oppositely Charged Pair of Homochiral Block- and Homopolypeptides in an Aqueous Medium. Macromol Rapid Commun 2015; 36:1958-64. [DOI: 10.1002/marc.201500368] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2015] [Revised: 08/07/2015] [Indexed: 11/10/2022]
Affiliation(s)
- Omer F. Mutaf
- Graduate School of Engineering; The University of Tokyo; 7-3-1, Hongo Bunkyo-ku, Tokyo 113-8656 Japan
| | - Akihiro Kishimura
- Faculty of Engineering; Kyushu University; 744 Moto-oka Nishi-ku, Fukuoka 819-0395 Japan
- Center for Molecular Systems; Kyushu University; 744 Moto-oka Nishi-ku, Fukuoka 819-0395 Japan
| | - Yuki Mochida
- Graduate School of Engineering; The University of Tokyo; 7-3-1, Hongo Bunkyo-ku, Tokyo 113-8656 Japan
| | - Ahram Kim
- Graduate School of Engineering; The University of Tokyo; 7-3-1, Hongo Bunkyo-ku, Tokyo 113-8656 Japan
| | - Kazunori Kataoka
- Graduate School of Engineering; The University of Tokyo; 7-3-1, Hongo Bunkyo-ku, Tokyo 113-8656 Japan
- Graduate School of Medicine; The University of Tokyo; 7-3-1, Hongo Bunkyo-ku, Tokyo 113-0033 Japan
| |
Collapse
|
30
|
Vaněk V, Pícha J, Fabre B, Buděšínský M, Lepšík M, Jiráček J. The Development of a Versatile Trifunctional Scaffold for Biological Applications. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500255] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
31
|
Walker SN, Tennyson RL, Chapman AM, Kennan AJ, McNaughton BR. GLUE that sticks to HIV: a helix-grafted GLUE protein that selectively binds the HIV gp41 N-terminal helical region. Chembiochem 2014; 16:219-22. [PMID: 25477243 DOI: 10.1002/cbic.201402531] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2014] [Indexed: 12/11/2022]
Abstract
Methods for the stabilization of well-defined helical peptide drugs and basic research tools have received considerable attention in the last decade. Here, we report the stable and functional display of an HIV gp41 C-peptide helix mimic on a GRAM-Like Ubiquitin-binding in EAP45 (GLUE) protein. C-peptide helix-grafted GLUE selectively binds a mimic of the N-terminal helical region of gp41, a well-established HIV drug target, in a complex cellular environment. Additionally, the helix-grafted GLUE is folded in solution, stable in human serum, and soluble in aqueous solutions, and thus overcomes challenges faced by a multitude of peptide drugs, including those derived from HIV gp41 C-peptide.
Collapse
Affiliation(s)
- Susanne N Walker
- Department of Biochemistry and Molecular Biology, Colorado State University, Fort Collins, CO 80523 (USA)
| | | | | | | | | |
Collapse
|
32
|
Sharma GVM, Thodupunuri P, Sirisha K, Basha SJ, Gurava Reddy P, Sarma AVS. Design and synthesis of peptides with hybrid helix-turn-helix (HTH) motif and their conformational study. J Org Chem 2014; 79:8614-28. [PMID: 25180942 DOI: 10.1021/jo501267k] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The present study is aimed at the design and synthesis of peptides with hybrid helix-turn-helix (HTH) motif and their conformational analysis (NMR, MD, and CD studies). The requisite peptides with heterogeneous backbones were prepared from β-, γ-, and δ-amino acids with carbohydrate side chains and α-amino acid, L-Ala. The α/β-peptides were prepared from (S)-β-Caa(l) (C-linked carbo-β-amino acid with D-lyxo furanoside side chain) and L-Ala with a 1:1 alternation. The α/β-peptides with "helix-turn" motif displayed a 11/9-helix nucleating a 13-atom H-bonding turn. The α/β-octapeptides showed the presence of HTH structures with bifurcated 11/15-H-bonded turn. Further, the α/β-hexapeptide with HT motif, independently on coupling with γ/α/γ/α- and δ/α/δ/α-tetrapeptides at the C-terminus provided access to the decapeptides with "hybrid HTH" motifs. The decapeptide ("α-β-α-β-α-β-γ-α-γ-α") showed a hybrid HTH with "11/9/11/9/11/16/9/12/10" H-bonding, while the decapeptide ("α-β-α-β-α-β-δ-α-δ-α") revealed the presence of a "11/9/11/9/11/17/9/13/11" helical pattern. The above peptides thus have shown compatibility between different types of helices and serendipitous bifurcated 11/16- and 11/17-turns. The present study thus provided the first opportunity for the design and study of "hybrid HTH" motifs with more than one kind of helical structures in them.
Collapse
Affiliation(s)
- Gangavaram V M Sharma
- Organic and Bimolecular Chemistry Division, CSIR-Indian Institute of Chemical Technology , Hyderabad 500 007, India
| | | | | | | | | | | |
Collapse
|
33
|
Richardson LGL, Clendening EA, Sheen H, Gidda SK, White KA, Mullen RT. A unique N-terminal sequence in the Carnation Italian ringspot virus p36 replicase-associated protein interacts with the host cell ESCRT-I component Vps23. J Virol 2014; 88:6329-44. [PMID: 24672030 PMCID: PMC4093892 DOI: 10.1128/jvi.03840-13] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2013] [Accepted: 03/18/2014] [Indexed: 01/24/2023] Open
Abstract
UNLABELLED Like most positive-strand RNA viruses, infection by plant tombusviruses results in extensive rearrangement of specific host cell organelle membranes that serve as the sites of viral replication. The tombusvirus Tomato bushy stunt virus (TBSV) replicates within spherules derived from the peroxisomal boundary membrane, a process that involves the coordinated action of various viral and cellular factors, including constituents of the endosomal sorting complex required for transport (ESCRT). ESCRT is comprised of a series of protein subcomplexes (i.e., ESCRT-0 -I, -II, and -III) that normally participate in late endosome biogenesis and some of which are also hijacked by certain enveloped retroviruses (e.g., HIV) for viral budding from the plasma membrane. Here we show that the replication of Carnation Italian ringspot virus (CIRV), a tombusvirus that replicates at mitochondrial membranes also relies on ESCRT. In plant cells, CIRV recruits the ESCRT-I protein, Vps23, to mitochondria through an interaction that involves a unique region in the N terminus of the p36 replicase-associated protein that is not conserved in TBSV or other peroxisome-targeted tombusviruses. The interaction between p36 and Vps23 also involves the Vps23 C-terminal steadiness box domain and not its N-terminal ubiquitin E2 variant domain, which in the case of TBSV (and enveloped retroviruses) mediates the interaction with ESCRT. Overall, these results provide evidence that CIRV uses a unique N-terminal sequence for the recruitment of Vps23 that is distinct from those used by TBSV and certain mammalian viruses for ESCRT recruitment. Characterization of this novel interaction with Vps23 contributes to our understanding of how CIRV may have evolved to exploit key differences in the plant ESCRT machinery. IMPORTANCE Positive-strand RNA viruses replicate their genomes in association with specific host cell membranes. To accomplish this, cellular components responsible for membrane biogenesis and modeling are appropriated by viral proteins and redirected to assemble membrane-bound viral replicase complexes. The diverse pathways leading to the formation of these replication structures are poorly understood. We have determined that the cellular ESCRT system that is normally responsible for mediating late endosome biogenesis is also involved in the replication of the tombusvirus Carnation Italian ringspot virus (CIRV) at mitochondria. Notably, CIRV recruits ESCRT to the mitochondrial outer membrane via an interaction between a unique motif in the viral protein p36 and the ESCRT component Vps23. Our findings provide new insights into tombusvirus replication and the virus-induced remodeling of plant intracellular membranes, as well as normal ESCRT assembly in plants.
Collapse
Affiliation(s)
- Lynn G. L. Richardson
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, Ontario, Canada
| | - Eric A. Clendening
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, Ontario, Canada
| | - Hyukho Sheen
- Department of Biology, York University, Toronto, Ontario, Canada
| | - Satinder K. Gidda
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, Ontario, Canada
| | - K. Andrew White
- Department of Biology, York University, Toronto, Ontario, Canada
| | - Robert T. Mullen
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, Ontario, Canada
| |
Collapse
|
34
|
Zhang Y, Eigenbrot C, Zhou L, Shia S, Li W, Quan C, Tom J, Moran P, Di Lello P, Skelton NJ, Kong-Beltran M, Peterson A, Kirchhofer D. Identification of a small peptide that inhibits PCSK9 protein binding to the low density lipoprotein receptor. J Biol Chem 2013; 289:942-55. [PMID: 24225950 DOI: 10.1074/jbc.m113.514067] [Citation(s) in RCA: 116] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
PCSK9 (proprotein convertase subtilisin/kexin type 9) is a negative regulator of the hepatic LDL receptor, and clinical studies with PCSK9-inhibiting antibodies have demonstrated strong LDL-c-lowering effects. Here we screened phage-displayed peptide libraries and identified the 13-amino acid linear peptide Pep2-8 as the smallest PCSK9 inhibitor with a clearly defined mechanism of inhibition that has been described. Pep2-8 bound to PCSK9 with a KD of 0.7 μm but did not bind to other proprotein convertases. It fully restored LDL receptor surface levels and LDL particle uptake in PCSK9-treated HepG2 cells. The crystal structure of Pep2-8 bound to C-terminally truncated PCSK9 at 1.85 Å resolution showed that the peptide adopted a strand-turn-helix conformation, which is remarkably similar to its solution structure determined by NMR. Consistent with the functional binding site identified by an Ala scan of PCSK9, the structural Pep2-8 contact region of about 400 Å(2) largely overlapped with that contacted by the EGF(A) domain of the LDL receptor, suggesting a competitive inhibition mechanism. Consistent with this, Pep2-8 inhibited LDL receptor and EGF(A) domain binding to PCSK9 with IC50 values of 0.8 and 0.4 μm, respectively. Remarkably, Pep2-8 mimicked secondary structural elements of the EGF(A) domain that interact with PCSK9, notably the β-strand and a discontinuous short α-helix, and it engaged in the same β-sheet hydrogen bonds as EGF(A) does. Although Pep2-8 itself may not be amenable to therapeutic applications, this study demonstrates the feasibility of developing peptidic inhibitors to functionally relevant sites on PCSK9.
Collapse
Affiliation(s)
- Yingnan Zhang
- From the Departments of Early Discovery Biochemistry
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
35
|
Kokan Z, Kirin SI. “Backdoor Induction” of Chirality in Asymmetric Hydrogenation with Rhodium(I) Complexes of Amino Acid Substituted Triphenylphosphane Ligands. European J Org Chem 2013. [DOI: 10.1002/ejoc.201301011] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
36
|
Góngora-Benítez M, Tulla-Puche J, Albericio F. Multifaceted Roles of Disulfide Bonds. Peptides as Therapeutics. Chem Rev 2013; 114:901-26. [DOI: 10.1021/cr400031z] [Citation(s) in RCA: 388] [Impact Index Per Article: 35.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Miriam Góngora-Benítez
- Institute
for Research in Biomedicine (IRB Barcelona), Barcelona, 08028 Spain
- CIBER-BBN, Barcelona Science
Park, Barcelona, 08028 Spain
| | - Judit Tulla-Puche
- Institute
for Research in Biomedicine (IRB Barcelona), Barcelona, 08028 Spain
- CIBER-BBN, Barcelona Science
Park, Barcelona, 08028 Spain
| | - Fernando Albericio
- Institute
for Research in Biomedicine (IRB Barcelona), Barcelona, 08028 Spain
- CIBER-BBN, Barcelona Science
Park, Barcelona, 08028 Spain
- Department
of Organic Chemistry, University of Barcelona, Barcelona, 08028 Spain
- School of Chemistry & Physics, University of KwaZulu-Natal, 4001 Durban, South Africa
| |
Collapse
|
37
|
Jamieson AG, Boutard N, Sabatino D, Lubell WD. Peptide scanning for studying structure-activity relationships in drug discovery. Chem Biol Drug Des 2013; 81:148-65. [PMID: 23253136 DOI: 10.1111/cbdd.12042] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Peptide-based therapeutics have grown in importance over the last few decades. Furthermore, peptides have been extensively used as lead compounds in the drug discovery process to investigate the nature of chemical space required for molecular recognition and activity at a variety of targets. This critical commentary reviews scanning techniques, which employ natural and non-proteinogenic amino acids to facilitate understanding of structural requirements for peptide biological activity. The value of sequence analysis by such methods is highlighted by examples, in which the elements for peptide affinity and activity have been elucidated and employed to prepare peptidomimetic leads for drug development.
Collapse
Affiliation(s)
- Andrew G Jamieson
- Department of Chemistry, University of Leicester, Leicester LE1 7RH, UK
| | | | | | | |
Collapse
|
38
|
Thorat VH, Ingole TS, Vijayadas KN, Nair RV, Kale SS, Ramesh VVE, Davis HC, Prabhakaran P, Gonnade RG, Gawade RL, Puranik VG, Rajamohanan PR, Sanjayan GJ. The Ant-Pro Reverse-Turn Motif. Structural Features and Conformational Characteristics. European J Org Chem 2013. [DOI: 10.1002/ejoc.201201739] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
|
39
|
Vijayadas KN, Nair RV, Gawade RL, Kotmale AS, Prabhakaran P, Gonnade RG, Puranik VG, Rajamohanan PR, Sanjayan GJ. Ester vs. amide on folding: a case study with a 2-residue synthetic peptide. Org Biomol Chem 2013; 11:8348-56. [DOI: 10.1039/c3ob41967c] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
|
40
|
Selent J, Kaczor AA, Guixà-González R, Carrió P, Pastor M, Obiol-Pardo C. Rational design of the survivin/CDK4 complex by combining protein-protein docking and molecular dynamics simulations. J Mol Model 2012; 19:1507-14. [PMID: 23263360 DOI: 10.1007/s00894-012-1705-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2012] [Accepted: 11/19/2012] [Indexed: 01/10/2023]
Abstract
Survivin, the smallest inhibitor of apoptosis protein (IAP), is a valid target for cancer research. It mediates both the apoptosis pathway and the cell cycle and has been proposed to form a complex with the cyclin-dependent kinase protein CDK4. The resulting complex transports CDK4 from the cytosol to the nucleus, where CDK4 participates in cell division. Survivin has been recognized as a node protein that interacts with several partners; disruption of the formed complexes can lead to new anticancer compounds. We propose a rational model of the survivin/CDK4 complex that fulfills the experimental evidence and that can be used for structure-based design of inhibitors modifying its interface recognition. In particular, the suggested complex involves the alpha helical domain of survivin and resembles the mode of binding of survivin in the survivin/borealin X-ray structure. The proposed model has been obtained by combining protein-protein docking, fractal-based shape complementarity, electrostatics studies and extensive molecular dynamics simulations.
Collapse
Affiliation(s)
- Jana Selent
- Research Programme on Biomedical Informatics (GRIB), IMIM/Universitat Pompeu Fabra, Dr. Aiguader 88, 08003 Barcelona, Spain
| | | | | | | | | | | |
Collapse
|
41
|
Sim S, Kim Y, Kim T, Lim S, Lee M. Directional Assembly of α-Helical Peptides Induced by Cyclization. J Am Chem Soc 2012. [DOI: 10.1021/ja3098756] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Seunghyun Sim
- Center for Bio-Responsive Assembly and Department of
Chemistry, Seoul National University, Seoul
151-747, Korea
| | - Yongju Kim
- Center for Bio-Responsive Assembly and Department of
Chemistry, Seoul National University, Seoul
151-747, Korea
| | - Taehoon Kim
- Center for Bio-Responsive Assembly and Department of
Chemistry, Seoul National University, Seoul
151-747, Korea
| | - Sunhee Lim
- Center for Bio-Responsive Assembly and Department of
Chemistry, Seoul National University, Seoul
151-747, Korea
| | - Myongsoo Lee
- Center for Bio-Responsive Assembly and Department of
Chemistry, Seoul National University, Seoul
151-747, Korea
| |
Collapse
|
42
|
Brown ZZ, Akula K, Arzumanyan A, Alleva J, Jackson M, Bichenkov E, Sheffield JB, Feitelson MA, Schafmeister CE. A spiroligomer α-helix mimic that binds HDM2, penetrates human cells and stabilizes HDM2 in cell culture. PLoS One 2012; 7:e45948. [PMID: 23094022 PMCID: PMC3475717 DOI: 10.1371/journal.pone.0045948] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2012] [Accepted: 08/23/2012] [Indexed: 11/19/2022] Open
Abstract
We demonstrate functionalized spiroligomers that mimic the HDM2-bound conformation of the p53 activation domain. Spiroligomers are stereochemically defined, functionalized, spirocyclic monomers coupled through pairs of amide bonds to create spiro-ladder oligomers [1]. Two series of spiroligomers were synthesized, one of structural analogs and one of stereochemical analogs, from which we identified compound 1, that binds HDM2 with a Kd value of 400 nM. The spiroligomer 1 penetrates human liver cancer cells through passive diffusion and in a dose-dependent and time-dependent manner increases the levels of HDM2 more than 30-fold in Huh7 cells in which the p53/HDM2 negative feed-back loop is inoperative. This is a biological effect that is not seen with the HDM2 ligand nutlin-3a. We propose that compound 1 modulates the levels of HDM2 by stabilizing it to proteolysis, allowing it to accumulate in the absence of a p53/HDM2 feedback loop.
Collapse
Affiliation(s)
- Zachary Z. Brown
- Department of Chemistry, Princeton University, Princeton, New Jersey, United States of America
| | - Kavitha Akula
- Chemistry Department, Temple University, Philadelphia, Pennsylvania, United States of America
| | - Alla Arzumanyan
- Department of Biology, Temple University, Philadelphia, Pennsylvania, United States of America
| | - Jennifer Alleva
- Department of Chemistry, Princeton University, Princeton, New Jersey, United States of America
| | - Marcus Jackson
- Chemistry Department, Temple University, Philadelphia, Pennsylvania, United States of America
| | - Eugeney Bichenkov
- Department of Biology, Temple University, Philadelphia, Pennsylvania, United States of America
| | - Joel B. Sheffield
- Department of Biology, Temple University, Philadelphia, Pennsylvania, United States of America
| | - Mark A. Feitelson
- Department of Biology, Temple University, Philadelphia, Pennsylvania, United States of America
| | - Christian E. Schafmeister
- Chemistry Department, Temple University, Philadelphia, Pennsylvania, United States of America
- * E-mail:
| |
Collapse
|
43
|
Shi SP, Qiu JD, Sun XY, Suo SB, Huang SY, Liang RP. A method to distinguish between lysine acetylation and lysine methylation from protein sequences. J Theor Biol 2012; 310:223-30. [DOI: 10.1016/j.jtbi.2012.06.030] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2012] [Revised: 05/21/2012] [Accepted: 06/25/2012] [Indexed: 01/21/2023]
|
44
|
Adler MJ, Scott RTW, Hamilton AD. Enaminone-based mimics of extended and hydrophilic α-helices. Chemistry 2012; 18:12974-7. [PMID: 22936425 DOI: 10.1002/chem.201202120] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2012] [Indexed: 11/10/2022]
Abstract
Synthetic molecules capable of the mimicry of α-helices that are elongated and/or contain hydrophilic side chains have been largely elusive. However, the oligophenylenaminone structure can surmount both of these challenges (see scheme).
Collapse
Affiliation(s)
- Marc J Adler
- Department of Chemistry, University of Oxford, 12 Mansfield Road, Oxford, OX1 3TA, UK
| | | | | |
Collapse
|
45
|
Fülöp L, Mándity IM, Juhász G, Szegedi V, Hetényi A, Wéber E, Bozsó Z, Simon D, Benkő M, Király Z, Martinek TA. A foldamer-dendrimer conjugate neutralizes synaptotoxic β-amyloid oligomers. PLoS One 2012; 7:e39485. [PMID: 22859942 PMCID: PMC3408453 DOI: 10.1371/journal.pone.0039485] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2012] [Accepted: 05/21/2012] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND AND AIMS Unnatural self-organizing biomimetic polymers (foldamers) emerged as promising materials for biomolecule recognition and inhibition. Our goal was to construct multivalent foldamer-dendrimer conjugates which wrap the synaptotoxic β-amyloid (Aβ) oligomers with high affinity through their helical foldamer tentacles. Oligomeric Aβ species play pivotal role in Alzheimer's disease, therefore recognition and direct inhibition of this undruggable target is a great current challenge. METHODS AND RESULTS Short helical β-peptide foldamers with designed secondary structures and side chain chemistry patterns were applied as potential recognition segments and their binding to the target was tested with NMR methods (saturation transfer difference and transferred-nuclear Overhauser effect). Helices exhibiting binding in the µM region were coupled to a tetravalent G0-PAMAM dendrimer. In vitro biophysical (isothermal titration calorimetry, dynamic light scattering, transmission electron microscopy and size-exclusion chromatography) and biochemical tests (ELISA and dot blot) indicated the tight binding between the foldamer conjugates and the Aβ oligomers. Moreover, a selective low nM interaction with the low molecular weight fraction of the Aβ oligomers was found. Ex vivo electrophysiological experiments revealed that the new material rescues the long-term potentiation from the toxic Aβ oligomers in mouse hippocampal slices at submicromolar concentration. CONCLUSIONS The combination of the foldamer methodology, the fragment-based approach and the multivalent design offers a pathway to unnatural protein mimetics that are capable of specific molecular recognition, and has already resulted in an inhibitor for an extremely difficult target.
Collapse
Affiliation(s)
- Lívia Fülöp
- Department of Medical Chemistry, University of Szeged, Szeged, Hungary
| | - István M. Mándity
- Institute of Pharmaceutical Chemistry, University of Szeged, Szeged, Hungary
| | - Gábor Juhász
- Department of Medical Chemistry, University of Szeged, Szeged, Hungary
| | - Viktor Szegedi
- Bay Zoltán Foundation for Applied Research – BAYGEN, Szeged, Hungary
| | | | - Edit Wéber
- Institute of Pharmaceutical Chemistry, University of Szeged, Szeged, Hungary
| | - Zsolt Bozsó
- Department of Medical Chemistry, University of Szeged, Szeged, Hungary
| | - Dóra Simon
- Department of Medical Chemistry, University of Szeged, Szeged, Hungary
| | - Mária Benkő
- Department of Physical Chemistry and Materials Science, University of Szeged, Szeged, Hungary
| | - Zoltán Király
- Department of Physical Chemistry and Materials Science, University of Szeged, Szeged, Hungary
| | - Tamás A. Martinek
- Institute of Pharmaceutical Chemistry, University of Szeged, Szeged, Hungary
| |
Collapse
|
46
|
Castellucci N, Gentilucci L, Tomasini C. One-pot synthesis of poly-substituted tetramic acids for the preparation of putative turn mimics. Tetrahedron 2012. [DOI: 10.1016/j.tet.2011.11.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
47
|
Abstract
Recent success stories concerning the targeting of protein-protein interactions (PPIs) have led to an increased focus on this challenging target class for drug discovery. This article explores various avenues to assess the druggability of PPIs and describes a druggability decision flow chart, which can be applied to any PPI target. This flow chart not only covers small molecules but also peptidomimetics, peptides and conformationally restricted peptides as potential modalities for targeting PPIs. Additionally, a retrospective analysis of PPI druggability using various computational tools is summarized. The application of a systematic approach as presented in this paper will increase confidence that modulators (e.g., small organic molecules or peptides) can ultimately be identified for a particular target before a decision is made to commit significant discovery resources.
Collapse
|
48
|
Vijayadas KN, Davis HC, Kotmale AS, Gawade RL, Puranik VG, Rajamohanan PR, Sanjayan GJ. An unusual conformational similarity of two peptide folds featuring sulfonamide and carboxamide on the backbone. Chem Commun (Camb) 2012; 48:9747-9. [DOI: 10.1039/c2cc34533a] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
49
|
Shi SP, Qiu JD, Sun XY, Suo SB, Huang SY, Liang RP. PLMLA: prediction of lysine methylation and lysine acetylation by combining multiple features. MOLECULAR BIOSYSTEMS 2012; 8:1520-7. [DOI: 10.1039/c2mb05502c] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
|
50
|
Kokan Z, Kirin SI. The application of “backdoor induction” in bioinspired asymmetric catalysis. RSC Adv 2012. [DOI: 10.1039/c2ra20598j] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|