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Lambrughi M, Sanader Maršić Ž, Saez-Jimenez V, Mapelli V, Olsson L, Papaleo E. Conformational gating in ammonia lyases. Biochim Biophys Acta Gen Subj 2020; 1864:129605. [PMID: 32222547 DOI: 10.1016/j.bbagen.2020.129605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Revised: 03/11/2020] [Accepted: 03/23/2020] [Indexed: 11/17/2022]
Abstract
BACKGROUND Ammonia lyases are enzymes of industrial and biomedical interest. Knowledge of structure-dynamics-function relationship in ammonia lyases is instrumental for exploiting the potential of these enzymes in industrial or biomedical applications. METHODS We investigated the conformational changes in the proximity of the catalytic pocket of a 3-methylaspartate ammonia lyase (MAL) as a model system. At this scope, we used microsecond all-atom molecular dynamics simulations, analyzed with dimensionality reduction techniques, as well as in terms of contact networks and correlated motions. RESULTS We identify two regulatory elements in the MAL structure, i.e., the β5-α2 loop and the helix-hairpin-loop subdomain. These regulatory elements undergo conformational changes switching from 'occluded' to 'open' states. The rearrangements are coupled to changes in the accessibility of the active site. The β5-α2 loop and the helix-hairpin-loop subdomain modulate the formation of tunnels from the protein surface to the catalytic site, making the active site more accessible to the substrate when they are in an open state. CONCLUSIONS Our work pinpoints a sequential mechanism, in which the helix-hairpin-loop subdomain of MAL needs to break a subset of intramolecular interactions first to favor the displacement of the β5-α2 loop. The coupled conformational changes of these two elements contribute to modulate the accessibility of the catalytic site. GENERAL SIGNIFICANCE Similar molecular mechanisms can have broad relevance in other ammonia lyases with similar regulatory loops. Our results also imply that it is important to account for protein dynamics in the design of variants of ammonia lyases for industrial and biomedical applications.
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Affiliation(s)
- Matteo Lambrughi
- Computational Biology Laboratory, Danish Cancer Society Research Center, Copenhagen, Denmark
| | - Željka Sanader Maršić
- Computational Biology Laboratory, Danish Cancer Society Research Center, Copenhagen, Denmark
| | - Veronica Saez-Jimenez
- Division of Industrial Biotechnology, Department of Biology and Biological Engineering, Chalmers University of Technology, Göteborg, Sweden
| | - Valeria Mapelli
- Division of Industrial Biotechnology, Department of Biology and Biological Engineering, Chalmers University of Technology, Göteborg, Sweden
| | - Lisbeth Olsson
- Division of Industrial Biotechnology, Department of Biology and Biological Engineering, Chalmers University of Technology, Göteborg, Sweden
| | - Elena Papaleo
- Computational Biology Laboratory, Danish Cancer Society Research Center, Copenhagen, Denmark; Translational Disease Systems Biology, Faculty of Health and Medical Sciences, Novo Nordisk Foundation Center for Protein Research University of Copenhagen, Copenhagen, Denmark.
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2
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“Bridge regions” regulate catalysis and protein stability of acylpeptide hydrolase. Biochem Eng J 2019. [DOI: 10.1016/j.bej.2019.01.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Zhu J, Wang Y, Li X, Han W, Zhao L. Understanding the interactions of different substrates with wild-type and mutant acylaminoacyl peptidase using molecular dynamics simulations. J Biomol Struct Dyn 2017; 36:4285-4302. [PMID: 29235404 DOI: 10.1080/07391102.2017.1414634] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Acylaminoacylpeptidase (AAP) belongs to peptidase protein family, which can degrade amyloid β-peptide forms in the brains of patients, and hence leads to Alzheimer's disease. And so, AAP is considered to be a novel target in the design of drugs against Alzheimer's disease. In this investigation, six molecular dynamics simulations were used to find that the interaction between the wild-type and R526V AAP with two different substrates (p-nitrophenylcaprylate and Ac-Leu-p-nitroanilide). Our results were as follows: firstly, Ac-Leu-p-nitroanilide bound to R526V AAP to form a more disordered loop (residues 552-562) in the α/β-hydrolase fold like of AAP, which caused an open and inactive AAP domain form, secondly, binding p-nitrophenylcaprylate and Ac-Leu-p-nitroanilide to AAP can decrease the flexibility of residues 225-250, 260-270, and 425-450, in which the ordered secondary structures may contain the suitable geometrical structure and so it is useful to serine attack. Our theoretical results showed that the binding of the two substrates can induce specific conformational changes responsible for the diverse AAP catalytic specificity. These theoretical substrate-induced structural diversities can help explain the abilities of AAPs to recognize and hydrolyze extremely different substrates.
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Affiliation(s)
- Jingxuan Zhu
- a Key Laboratory for Molecular Enzymology and Engineering of Ministry of Education, School of Life Sciences , Jilin University , 2699 Qianjin Street, Changchun 130012 , China
| | - Yan Wang
- b Department of General Surgery , China-Japan Union Hospital of Jilin University , Changchun , China
| | - Xin Li
- a Key Laboratory for Molecular Enzymology and Engineering of Ministry of Education, School of Life Sciences , Jilin University , 2699 Qianjin Street, Changchun 130012 , China
| | - Weiwei Han
- a Key Laboratory for Molecular Enzymology and Engineering of Ministry of Education, School of Life Sciences , Jilin University , 2699 Qianjin Street, Changchun 130012 , China
| | - Li Zhao
- a Key Laboratory for Molecular Enzymology and Engineering of Ministry of Education, School of Life Sciences , Jilin University , 2699 Qianjin Street, Changchun 130012 , China
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4
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Jin H, Zhu J, Dong Y, Han W. Exploring the different ligand escape pathways in acylaminoacyl peptidase by random acceleration and steered molecular dynamics simulations. RSC Adv 2016. [DOI: 10.1039/c5ra24952j] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Acylaminoacyl peptidase (APH, EC 3.4.19.1) is a novel class of serine-type protease belonging to the prolyl oligopeptidase (POP) family.
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Affiliation(s)
- Hanyong Jin
- Key Laboratory for Molecular Enzymology and Engineering of Ministry of Education
- School of Life Science
- Jilin University
- Changchun 130012
- China
| | - Jingxuan Zhu
- Key Laboratory for Molecular Enzymology and Engineering of Ministry of Education
- School of Life Science
- Jilin University
- Changchun 130012
- China
| | - Yang Dong
- Key Laboratory for Molecular Enzymology and Engineering of Ministry of Education
- School of Life Science
- Jilin University
- Changchun 130012
- China
| | - Weiwei Han
- Key Laboratory for Molecular Enzymology and Engineering of Ministry of Education
- School of Life Science
- Jilin University
- Changchun 130012
- China
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5
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Tiberti M, Invernizzi G, Papaleo E. (Dis)similarity Index To Compare Correlated Motions in Molecular Simulations. J Chem Theory Comput 2015; 11:4404-14. [PMID: 26575932 DOI: 10.1021/acs.jctc.5b00512] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Molecular dynamics (MD) simulations are widely used to complement or guide experimental studies in the characterization of protein dynamics, thanks to improvements in force-field accuracy, along with in the software and hardware to sample the conformational landscape of proteins. Among the different applications of MD simulations, the study of correlated motions is largely employed for different purposes. Several metrics have been developed to describe correlated motions in the MD ensemble, such as methods based on Pearson Correlation or Mutual Information. Cross-correlation analysis of MD trajectories is indeed appealing not only to identify residues characterized by coupled fluctuations in protein structures but also since it can be used to extrapolate motions along directions in which major conformational changes should occur, for example on longer time scales than the ones that are actually simulated. Nevertheless, most of the MD studies employ average correlation maps and mostly in a qualitative way, even when different systems or different replicates of the same system are compared. The broad application of correlation metrics in the analysis of MD simulations, especially for comparative purposes, requires a step forward toward more quantitative and accurate comparisons. We thus here employed a simple but effective index, which is based on a normalized Frobenius norm of the differences between protein correlation maps, to compare correlated motions. We applied this index for a quantitative comparison of correlated motions from MD simulations of seven proteins of different size and fold. We also employed the index to assess the robustness of correlation description when multi-replicate MD simulations of a same system are used, and we compared our index to metrics for comparison of structural ensembles such as Root Mean Square Inner Product and the Bhattacharyya Coefficient.
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Affiliation(s)
- Matteo Tiberti
- Department of Biotechnology and Biosciences, University of Milano-Bicocca , Piazza della Scienza 2, 20126 Milan, Italy
| | - Gaetano Invernizzi
- Department of Biotechnology and Biosciences, University of Milano-Bicocca , Piazza della Scienza 2, 20126 Milan, Italy
| | - Elena Papaleo
- Department of Biotechnology and Biosciences, University of Milano-Bicocca , Piazza della Scienza 2, 20126 Milan, Italy
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Wang D, Jin H, Wang J, Guan S, Zhang Z, Han W. Exploration of the chlorpyrifos escape pathway from acylpeptide hydrolases using steered molecular dynamics simulations. J Biomol Struct Dyn 2015; 34:749-61. [PMID: 26155973 DOI: 10.1080/07391102.2015.1052097] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Acylpeptide hydrolases (APH) catalyze the removal of an N-acylated amino acid from blocked peptides. APH is significantly more sensitive than acetylcholinesterase, a target of Alzheimer's disease, to inhibition by organophosphorus (OP) compounds. Thus, OP compounds can be used as a tool to probe the physiological functions of APH. Here, we report the results of a computational study of molecular dynamics simulations of APH bound to the OP compounds and an exploration of the chlorpyrifos escape pathway using steered molecular dynamics (SMD) simulations. In addition, we apply SMD simulations to identify potential escape routes of chlorpyrifos from hydrolase hydrophobic cavities in the APH-inhibitor complex. Two previously proposed APH pathways were reliably identified by CAVER 3.0, with the estimated relative importance of P1 > P2 for its size. We identify the major pathway, P2, using SMD simulations, and Arg526, Glu88, Gly86, and Asn65 are identified as important residues for the ligand leaving via P2. These results may help in the design of APH-targeting drugs with improved efficacy, as well as in understanding APH selectivity of the inhibitor binding in the prolyl oligopeptidase family.
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Affiliation(s)
- Dongmei Wang
- a Key Laboratory for Molecular Enzymology and Engineering of the Ministry of Education , College of Life Science, Jilin University , Changchun 130023 , China
| | - Hanyong Jin
- a Key Laboratory for Molecular Enzymology and Engineering of the Ministry of Education , College of Life Science, Jilin University , Changchun 130023 , China
| | - Junling Wang
- a Key Laboratory for Molecular Enzymology and Engineering of the Ministry of Education , College of Life Science, Jilin University , Changchun 130023 , China
| | - Shanshan Guan
- b State Key Laboratory of Theoretical and Computational Chemistry , Institute of Theoretical Chemistry, Jilin University , Changchun 130023 , China
| | - Zuoming Zhang
- a Key Laboratory for Molecular Enzymology and Engineering of the Ministry of Education , College of Life Science, Jilin University , Changchun 130023 , China
| | - Weiwei Han
- a Key Laboratory for Molecular Enzymology and Engineering of the Ministry of Education , College of Life Science, Jilin University , Changchun 130023 , China
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7
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Jin H, Zhou Z, Wang D, Guan S, Han W. Molecular dynamics simulations of acylpeptide hydrolase bound to chlorpyrifosmethyl oxon and dichlorvos. Int J Mol Sci 2015; 16:6217-34. [PMID: 25794283 PMCID: PMC4394528 DOI: 10.3390/ijms16036217] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Accepted: 03/04/2015] [Indexed: 01/13/2023] Open
Abstract
Acylpeptide hydrolases (APHs) catalyze the removal of N-acylated amino acids from blocked peptides. Like other prolyloligopeptidase (POP) family members, APHs are believed to be important targets for drug design. To date, the binding pose of organophosphorus (OP) compounds of APH, as well as the different OP compounds binding and inducing conformational changes in two domains, namely, α/β hydrolase and β-propeller, remain poorly understood. We report a computational study of APH bound to chlorpyrifosmethyl oxon and dichlorvos. In our docking study, Val471 and Gly368 are important residues for chlorpyrifosmethyl oxon and dichlorvos binding. Molecular dynamics simulations were also performed to explore the conformational changes between the chlorpyrifosmethyl oxon and dichlorvos bound to APH, which indicated that the structural feature of chlorpyrifosmethyl oxon binding in APH permitted partial opening of the β-propeller fold and allowed the chlorpyrifosmethyl oxon to easily enter the catalytic site. These results may facilitate the design of APH-targeting drugs with improved efficacy.
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Affiliation(s)
- Hanyong Jin
- Key Laboratory for Molecular Enzymology and Engineering of the Ministry of Education, College of Life Science, Jilin University, Changchun 130023, China.
| | - Zhenhuan Zhou
- Second Bethune Hospital of Jilin University, Changchun 130041, China.
| | - Dongmei Wang
- Key Laboratory for Molecular Enzymology and Engineering of the Ministry of Education, College of Life Science, Jilin University, Changchun 130023, China.
| | - Shanshan Guan
- State Key Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, Changchun 130023, China.
| | - Weiwei Han
- Key Laboratory for Molecular Enzymology and Engineering of the Ministry of Education, College of Life Science, Jilin University, Changchun 130023, China.
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Menyhárd DK, Orgován Z, Szeltner Z, Szamosi I, Harmat V. Catalytically distinct states captured in a crystal lattice: the substrate-bound and scavenger states of acylaminoacyl peptidase and their implications for functionality. ACTA ACUST UNITED AC 2015; 71:461-72. [PMID: 25760596 DOI: 10.1107/s1399004714026819] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2014] [Accepted: 12/05/2014] [Indexed: 11/10/2022]
Abstract
Acylaminoacyl peptidase (AAP) is an oligopeptidase that only cleaves short peptides or protein segments. In the case of AAP from Aeropyrum pernix (ApAAP), previous studies have led to a model in which the clamshell-like opening and closing of the enzyme provides the means of substrate-size selection. The closed form of the enzyme is catalytically active, while opening deactivates the catalytic triad. The crystallographic results presented here show that the open form of ApAAP is indeed functionally disabled. The obtained crystal structures also reveal that the closed form is penetrable to small ligands: inhibitor added to the pre-formed crystal was able to reach the active site of the rigidified protein, which is only possible through the narrow channel of the propeller domain. Molecular-dynamics simulations investigating the structure of the complexes formed with longer peptide substrates showed that their binding within the large crevice of the closed form of ApAAP leaves the enzyme structure unperturbed; however, their accessing the binding site seems more probable when assisted by opening of the enzyme. Thus, the open form of ApAAP corresponds to a scavenger of possible substrates, the actual cleavage of which only takes place if the enzyme is able to re-close.
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Affiliation(s)
| | - Zoltán Orgován
- Laboratory of Structural Chemistry and Biology, Institute of Chemistry, Eötvös Loránd University, Pázmány Péter sétány 1/A, 1117 Budapest, Hungary
| | - Zoltán Szeltner
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Magyar tudósok körútja 2, 1117 Budapest, Hungary
| | - Ilona Szamosi
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Magyar tudósok körútja 2, 1117 Budapest, Hungary
| | - Veronika Harmat
- MTA-ELTE Protein Modelling Research Group, Pázmány Péter sétány 1/A, 1117 Budapest, Hungary
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9
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Parravicini F, Natalello A, Papaleo E, De Gioia L, Doglia SM, Lotti M, Brocca S. Reciprocal influence of protein domains in the cold-adapted acyl aminoacyl peptidase from Sporosarcina psychrophila. PLoS One 2013; 8:e56254. [PMID: 23457536 PMCID: PMC3574126 DOI: 10.1371/journal.pone.0056254] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2012] [Accepted: 01/07/2013] [Indexed: 11/24/2022] Open
Abstract
Acyl aminoacyl peptidases are two-domain proteins composed by a C-terminal catalytic α/β-hydrolase domain and by an N-terminal β-propeller domain connected through a structural element that is at the N-terminus in sequence but participates in the 3D structure of the C-domain. We investigated about the structural and functional interplay between the two domains and the bridge structure (in this case a single helix named α1-helix) in the cold-adapted enzyme from Sporosarcina psychrophila (SpAAP) using both protein variants in which entire domains were deleted and proteins carrying substitutions in the α1-helix. We found that in this enzyme the inter-domain connection dramatically affects the stability of both the whole enzyme and the β-propeller. The α1-helix is required for the stability of the intact protein, as in other enzymes of the same family; however in this psychrophilic enzyme only, it destabilizes the isolated β-propeller. A single charged residue (E10) in the α1-helix plays a major role for the stability of the whole structure. Overall, a strict interaction of the SpAAP domains seems to be mandatory for the preservation of their reciprocal structural integrity and may witness their co-evolution.
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Affiliation(s)
- Federica Parravicini
- Department of Biotechnology and Biosciences, University of Milano-Bicocca, Milan, Italy
| | - Antonino Natalello
- Department of Biotechnology and Biosciences, University of Milano-Bicocca, Milan, Italy
| | - Elena Papaleo
- Department of Biotechnology and Biosciences, University of Milano-Bicocca, Milan, Italy
| | - Luca De Gioia
- Department of Biotechnology and Biosciences, University of Milano-Bicocca, Milan, Italy
| | - Silvia Maria Doglia
- Department of Biotechnology and Biosciences, University of Milano-Bicocca, Milan, Italy
| | - Marina Lotti
- Department of Biotechnology and Biosciences, University of Milano-Bicocca, Milan, Italy
- * E-mail: (SB); (ML)
| | - Stefania Brocca
- Department of Biotechnology and Biosciences, University of Milano-Bicocca, Milan, Italy
- * E-mail: (SB); (ML)
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