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Serebryakova MV, Kordyukova LV, Semashko TA, Ksenofontov AL, Rudneva IA, Kropotkina EA, Filippova IY, Veit M, Baratova LA. Influenza virus hemagglutinin spike neck architectures and interaction with model enzymes evaluated by MALDI-TOF mass spectrometry and bioinformatics tools. Virus Res 2011; 160:294-304. [PMID: 21763731 DOI: 10.1016/j.virusres.2011.07.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2011] [Revised: 06/29/2011] [Accepted: 07/01/2011] [Indexed: 01/28/2023]
Abstract
Interactions between model enzymes and the influenza virus hemagglutinin (HA) homotrimeric spike were addressed. We digested influenza virions (naturally occurring strains and laboratory reassortants) with bromelain or subtilisin Carlsberg and analyzed by MALDI-TOF mass spectrometry the resulting HA2 C-terminal segments. All cleavage sites, together with (minor) sites detected in undigested HAs, were situated in the linker region that connects the transmembrane domain to the ectodomain. In addition to cleavage at highly favorable amino acids, various alternative enzyme preferences were found that strongly depended on the HA subtype/type. We also evaluated the surface electrostatic potentials, binding cleft topographies and spatial dimensions of stem bromelain (homologically modeled) and subtilisin Carlsberg (X-ray resolved). The results show that the enzymes (∼45Å(3)) would hardly fit into the small (∼18-20Å) linker region of the HA-spike. However, the HA membrane proximal ectodomain region was predicted to be intrinsically disordered. We propose that its motions allow steric adjustment of the enzymes' active sites to the neck of the HA spike. The subtype/type-specific architectures in this region also influenced significantly the cleavage preferences of the enzymes.
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Affiliation(s)
- Marina V Serebryakova
- Research Institute of Physical-Chemical Medicine, Federal Agency for Health Care and Social Development, Moscow, Russia
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Madala PK, Tyndall JDA, Nall T, Fairlie DP. Update 1 of: Proteases Universally Recognize Beta Strands In Their Active Sites. Chem Rev 2011; 110:PR1-31. [DOI: 10.1021/cr900368a] [Citation(s) in RCA: 129] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Praveen K. Madala
- Centre for Drug Design and Development, Institute for Molecular Bioscience, The University of Queensland, Brisbane, Qld 4072, Australia This is a Chemical Reviews Perennial Review. The root paper of this title was published in Chem. Rev. 2005, 105 (3), 973−1000; Published (Web) Feb. 16, 2005. Updates to the text appear in red type
| | - Joel D. A. Tyndall
- Centre for Drug Design and Development, Institute for Molecular Bioscience, The University of Queensland, Brisbane, Qld 4072, Australia This is a Chemical Reviews Perennial Review. The root paper of this title was published in Chem. Rev. 2005, 105 (3), 973−1000; Published (Web) Feb. 16, 2005. Updates to the text appear in red type
| | - Tessa Nall
- Centre for Drug Design and Development, Institute for Molecular Bioscience, The University of Queensland, Brisbane, Qld 4072, Australia This is a Chemical Reviews Perennial Review. The root paper of this title was published in Chem. Rev. 2005, 105 (3), 973−1000; Published (Web) Feb. 16, 2005. Updates to the text appear in red type
| | - David P. Fairlie
- Centre for Drug Design and Development, Institute for Molecular Bioscience, The University of Queensland, Brisbane, Qld 4072, Australia This is a Chemical Reviews Perennial Review. The root paper of this title was published in Chem. Rev. 2005, 105 (3), 973−1000; Published (Web) Feb. 16, 2005. Updates to the text appear in red type
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Mileni M, Kamtekar S, Wood DC, Benson TE, Cravatt BF, Stevens RC. Crystal structure of fatty acid amide hydrolase bound to the carbamate inhibitor URB597: discovery of a deacylating water molecule and insight into enzyme inactivation. J Mol Biol 2010; 400:743-54. [PMID: 20493882 DOI: 10.1016/j.jmb.2010.05.034] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2010] [Revised: 05/13/2010] [Accepted: 05/14/2010] [Indexed: 12/22/2022]
Abstract
The endocannabinoid system regulates a wide range of physiological processes including pain, inflammation, and cognitive/emotional states. URB597 is one of the best characterized covalent inhibitors of the endocannabinoid-degrading enzyme fatty acid amide hydrolase (FAAH). Here, we report the structure of the FAAH-URB597 complex at 2.3 A resolution. The structure provides insights into mechanistic details of enzyme inactivation and experimental evidence of a previously uncharacterized active site water molecule that likely is involved in substrate deacylation. This water molecule is part of an extensive hydrogen-bonding network and is coordinated indirectly to residues lining the cytosolic port of the enzyme. In order to corroborate our hypothesis concerning the role of this water molecule in FAAH's catalytic mechanism, we determined the structure of FAAH conjugated to a urea-based inhibitor, PF-3845, to a higher resolution (2.4 A) than previously reported. The higher-resolution structure confirms the presence of the water molecule in a virtually identical location in the active site. Examination of the structures of serine hydrolases that are non-homologous to FAAH, such as elastase, trypsin, or chymotrypsin, shows a similarly positioned hydrolytic water molecule and suggests a functional convergence between the amidase signature enzymes and serine proteases.
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Affiliation(s)
- Mauro Mileni
- Department of Molecular Biology, The Scripps Research Institute, La Jolla, CA 92037, USA
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Cianci M, Tomaszewski B, Helliwell JR, Halling PJ. Crystallographic Analysis of Counterion Effects on Subtilisin Enzymatic Action in Acetonitrile. J Am Chem Soc 2010; 132:2293-300. [DOI: 10.1021/ja908703c] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Michele Cianci
- European Molecular Biology Laboratory, Hamburg Outstation, c/o DESY, Building 25a, Notkestrasse 85, 22603 Hamburg, Germany, WestCHEM, Department of Pure & Applied Chemistry, University of Strathclyde, Glasgow G1 1XL, United Kingdom, and Department of Chemistry, University of Manchester, Manchester M13 9PL, United Kingdom
| | - Bartlomiej Tomaszewski
- European Molecular Biology Laboratory, Hamburg Outstation, c/o DESY, Building 25a, Notkestrasse 85, 22603 Hamburg, Germany, WestCHEM, Department of Pure & Applied Chemistry, University of Strathclyde, Glasgow G1 1XL, United Kingdom, and Department of Chemistry, University of Manchester, Manchester M13 9PL, United Kingdom
| | - John R. Helliwell
- European Molecular Biology Laboratory, Hamburg Outstation, c/o DESY, Building 25a, Notkestrasse 85, 22603 Hamburg, Germany, WestCHEM, Department of Pure & Applied Chemistry, University of Strathclyde, Glasgow G1 1XL, United Kingdom, and Department of Chemistry, University of Manchester, Manchester M13 9PL, United Kingdom
| | - Peter J. Halling
- European Molecular Biology Laboratory, Hamburg Outstation, c/o DESY, Building 25a, Notkestrasse 85, 22603 Hamburg, Germany, WestCHEM, Department of Pure & Applied Chemistry, University of Strathclyde, Glasgow G1 1XL, United Kingdom, and Department of Chemistry, University of Manchester, Manchester M13 9PL, United Kingdom
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Cruz A, Ramirez E, Santana A, Barletta G, López GE. Molecular dynamic study of subtilisin Carlsberg in aqueous and nonaqueous solvents. MOLECULAR SIMULATION 2009. [DOI: 10.1080/08927020802415670] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Abstract
The hydroxyl group of a serine residue at position 195 acts as a nucleophile in the catalytic mechanism of the serine proteases. However, the chemically similar residue, threonine, is rarely used in similar functional context. Our structural modeling suggests that the Ser 195 --> Thr trypsin variant is inactive due to negative steric interaction between the methyl group on the beta-carbon of Thr 195 and the disulfide bridge formed by cysteines 42 and 58. By simultaneously truncating residues 42 and 58 and substituting Ser 195 with threonine, we have successfully converted the classic serine protease trypsin to a functional threonine protease. Substitution of residue 42 with alanine and residue 58 with alanine or valine in the presence of threonine 195 results in trypsin variants that are 10(2) -10(4) -fold less active than wild type in kcat/KM but >10(6)-fold more active than the Ser 195 --> Thr single variant. The substitutions do not alter the substrate specificity of the enzyme in the P1'- P4' positions. Removal of the disulfide bridge decreases the overall thermostability of the enzyme, but it is partially rescued by the presence of threonine at position 195.
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Affiliation(s)
- Teaster T Baird
- University of California, San Francisco, Department of Pharmaceutical Chemistry, San Francisco, California 94143-2280, USA
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Tyndall JDA, Nall T, Fairlie DP. Proteases universally recognize beta strands in their active sites. Chem Rev 2005; 105:973-99. [PMID: 15755082 DOI: 10.1021/cr040669e] [Citation(s) in RCA: 301] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Joel D A Tyndall
- Centre for Drug Design and Development, Institute for Molecular Bioscience, University of Queensland, Brisbane, Qld 4072, Australia.
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Barrette-Ng IH, Ng KKS, Cherney MM, Pearce G, Ryan CA, James MNG. Structural basis of inhibition revealed by a 1:2 complex of the two-headed tomato inhibitor-II and subtilisin Carlsberg. J Biol Chem 2003; 278:24062-71. [PMID: 12684499 DOI: 10.1074/jbc.m302020200] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Multidomain proteinase inhibitors play critical roles in the defense of plants against predation by a wide range of pests. Despite a wealth of structural information on proteinase-single domain inhibitor interactions, the structural basis of inhibition by multidomain proteinase inhibitors remains poorly understood. Here we report the 2.5-A resolution crystal structure of the two-headed tomato inhibitor-II (TI-II) in complex with two molecules of subtilisin Carlsberg; it reveals how a multidomain inhibitor from the Potato II family of proteinase inhibitors can bind to and simultaneously inhibit two enzyme molecules within a single ternary complex. The N terminus of TI-II initiates the folding of Domain I (Lys-1 to Cys-15 and Pro-84 to Met-123) and then completes Domain II (Ile-26 to Pro-74) before coming back to complete the rest of Domain I (Pro-84 to Met-123). The two domains of TI-II adopt a similar fold and are arranged in an extended configuration that presents two reactive site loops at the opposite ends of the inhibitor molecule. Each subtilisin molecule interacts with a reactive site loop of TI-II through the standard, canonical binding mode. Remarkably, a significant distortion of the active site of subtilisin is induced by the presence of phenylalanine in the P1 position of reactive site loop II of TI-II. The structure of the TI-II.(subtilisin)2 complex provides a molecular framework for understanding how multiple inhibitory domains in a single Potato II type proteinase inhibitor molecule from the Potato II family act to inhibit proteolytic enzymes.
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Affiliation(s)
- Isabelle H Barrette-Ng
- Canadian Institutes for Health Research Group in Protein Structure and Function, Department of Biochemistry, University of Alberta, Edmonton, Alberta T6G 2H7, Canada
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Powers JC, Asgian JL, Ekici OD, James KE. Irreversible inhibitors of serine, cysteine, and threonine proteases. Chem Rev 2002; 102:4639-750. [PMID: 12475205 DOI: 10.1021/cr010182v] [Citation(s) in RCA: 818] [Impact Index Per Article: 37.2] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- James C Powers
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, USA.
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Abstract
Crystal structures for several hundred protease-inhibitor complexes have been analysed and their superimpositions have been used to demonstrate a universal relationship between inhibitor/substrate conformation and molecular recognition by all aspartic, serine, cysteine and metallo proteases. Proteases universally recognize an extended beta strand conformation in all their peptidic (and non-peptidic) inhibitors and substrate analogues without significant exceptions. This conformational homogeneity is illustrated here for a subset of 180 protease-inhibitor structures which are displayed as (a) structural overlays of multiple inhibitors for each of eight aspartic, eight serine, six metallo and five cysteine proteases; (b) single inhibitors each bound to different proteases; and (c) Ramachandran plots of peptide or pseudo-peptide dihedral angle pairs which demonstrate beta strands (Phi -54 degrees to -173 degrees, Psi 24 degrees to 174 degrees ) like those normally found paired in proteins as beta sheets. However, unlike beta sheets, alpha and 3(10) helices, beta and gamma turns, where the folded main chain amide components are intramolecularly hydrogen bonded and thus unavailable for interaction with proteins, an inhibitor/substrate in an isolated beta strand conformation provides maximum exposure of its hydrogen bonding donors/acceptors and side chain components to a putative protease receptor. This analysis highlights the advantages of a strand conformation over other elements of secondary structure for protease recognition and may lead to generic strategies for inhibitor design.
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Affiliation(s)
- J D Tyndall
- Centre for Drug Design and Development, University of Queensland, Brisbane, Queensland 4072, Australia
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Michels PC, Dordick JS, Clark DS. Dipole Formation and Solvent Electrostriction in Subtilisin Catalysis. J Am Chem Soc 1997. [DOI: 10.1021/ja9713892] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Peter C. Michels
- Contribution from the Department of Chemical and Biochemical Engineering, University of Iowa, Iowa City, Iowa, 52242, and Department of Chemical Engineering, University of California, Berkeley, California 94720
| | - Jonathan S. Dordick
- Contribution from the Department of Chemical and Biochemical Engineering, University of Iowa, Iowa City, Iowa, 52242, and Department of Chemical Engineering, University of California, Berkeley, California 94720
| | - Douglas S. Clark
- Contribution from the Department of Chemical and Biochemical Engineering, University of Iowa, Iowa City, Iowa, 52242, and Department of Chemical Engineering, University of California, Berkeley, California 94720
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Affiliation(s)
- Hans-Hartwig Otto
- Department of Pharmaceutical Chemistry, University of Freiburg, Hermann-Herder-Str. 9, D-79104 Freiburg i.Br., Germany
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Demuth HU, Schierhorn A, Bryan P, Höfke R, Kirschke H, Brömme D. N-peptidyl, O-acyl hydroxamates: comparison of the selective inhibition of serine and cysteine proteinases. BIOCHIMICA ET BIOPHYSICA ACTA 1996; 1295:179-86. [PMID: 8695644 DOI: 10.1016/0167-4838(96)00038-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Two series of N-aminoacyl, O-benzoyl hydroxamates were designed to investigate the influence of the substituted benzoyl residue on the hydrolytic stability and the reactivity of these potential inhibitors towards selected cysteine and serine proteinases. The inactivators react more rapidly with cysteine proteinases than with the serine enzymes tested. While Z-Phe-Gly-NHO-Nbz is the most reactive inhibitor of cathepsin L, inhibiting the target protein by a second order rate constant of 932.000 M-1 s-1, the bacterial serine proteinase thermitase is inhibited best by Z-Gly-Phe-NHO-Nbz, exhibiting a second-order rate constant of 1.170 M-1 s-1. Thiolsubtilisin, having the thiol-group as the reactive nucleophile instead of serine, exhibits specificity constants of the inactivation two orders of magnitude smaller than subtilisin. The degree of selectivity of the inhibitors relative to cathepsin B, cathepsin L, cathepsin S and papain varies up to two orders of magnitude with respect to their second order rate constant of inactivation. The inhibitory reactivity of these compounds varies only up to sixfold depending on the benzoyl substituent. Similarly, the rate constants for the hydrolytic decomposition of the compounds vary by a factor of about 6, suggesting that the structural and mechanistic features of the compounds which are responsible for decomposition as well as for the enzyme inhibition are the same. Comparing both reactions, the data allow the calculation of an acceleration factor of 2.4 x 10(10) for the inhibition of cathepsin L by its most effective inhibitor, clearly characterizing this enzyme inhibition reaction as enzyme-activated.
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Affiliation(s)
- H U Demuth
- Department of Drug Biochemistry, Hans-Knoell-Institute of Natural Product Research Jena, Martin-Luther-University of Halle, Saale, Germany.
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