Keyword search (3,448 papers available)


Virtual screening, docking, and dynamics of potential new inhibitors of dihydrofolate reductase from Yersinia pestis.

Author(s): Bastos Lda C, de Souza FR, Guimarães AP, Sirouspour M, Cuya Guizado TR, Forgione P, Ramalho TC, França TC

J Biomol Struct Dyn. 2016 Oct;34(10):2184-98 Authors: Bastos Lda C, de Souza FR, Guimarães AP, Sirouspour M, Cuya Guizado TR, Forgione P, Ramalho TC, França TC

Article GUID: 26494420
Docking and molecular dynamics studies of peripheral site ligand-oximes as reactivators of sarin-inhibited human acetylcholinesterase.

Author(s): de Almeida JS, Cuya Guizado TR, Guimarães AP, Ramalho TC, Gonçalves AS, de Koning MC, França TC

J Biomol Struct Dyn. 2016 Dec;34(12):2632-2642 Authors: de Almeida JS, Cuya Guizado TR, Guimarães AP, Ramalho TC, Gonçalves AS, de Koning MC, França TC

Article GUID: 26612005
Mechanistic studies of new oximes reactivators of human butyryl cholinesterase inhibited by cyclosarin and sarin.

Author(s): de Lima WE, Francisco A, da Cunha EF, Radic Z, Taylor P, França TC, Ramalho TC

J Biomol Struct Dyn. 2017 May;35(6):1272-1282 Authors: de Lima WE, Francisco A, da Cunha EF, Radic Z, Taylor P, França TC, Ramalho TC

Article GUID: 27125569
New insights on molecular interactions of organophosphorus pesticides with esterases.

Author(s): Mangas I, Estevez J, Vilanova E, França TC

Toxicology. 2017 Feb 01;376:30-43 Authors: Mangas I, Estevez J, Vilanova E, França TC

Article GUID: 27311923
Analysis of Coxiela burnetti dihydrofolate reductase via in silico docking with inhibitors and molecular dynamics simulation.

Author(s): de Souza FR, Guimarães AP, Cuya T, de Freitas MP, Gonçalves ADS, Forgione P, Costa França TC

J Biomol Struct Dyn. 2017 Oct;35(13):2975-2986 Authors: de Souza FR, Guimarães AP, Cuya T, de Freitas MP, Gonçalves ADS, Forgione P, Costa França TC

Article GUID: 27726597
Title:New insights on molecular interactions of organophosphorus pesticides with esterases.
Authors:Mangas I,  Estevez J,  Vilanova E,  França TC
Link:https://www.ncbi.nlm.nih.gov/pubmed/27311923?dopt=Abstract
Category:Toxicology
PMID:27311923
Dept Affiliation: CHEMBIOCHEM
1 Laboratory of Molecular Modeling Applied to the Chemical and Biological Defense (LMCBD), Military Institute of Engineering, Rio de Janeiro, RJ, Brazil. Electronic address: imangas@umh.es.
2 Toxicology and Chemical Safety Unit, Universidad Miguel Hernandez, Elche, Spain.
3 Laboratory of Molecular Modeling Applied to the Chemical and Biological Defense (LMCBD), Military Institute of Engineering, Rio de Janeiro, RJ, Brazil; Center for Basic and Applied Research, Faculty of Informatics and Management, University of Hradec Kralove, Czech Republic; Department of Chemistry & Biochemistry, Concordia University, Montreal, QC, Canada.

Description:

New insights on molecular interactions of organophosphorus pesticides with esterases.

Toxicology. 2017 Feb 01;376:30-43

Authors: Mangas I, Estevez J, Vilanova E, França TC

Abstract

Organophosphorus compounds (OPs) are a large and diverse class of chemicals mainly used as pesticides and chemical weapons. People may be exposed to OPs in several occasions, which can produce several distinct neurotoxic effects depending on the dose, frequency of exposure, type of OP, and the host factors that influence susceptibility and sensitivity. These neurotoxic effects are mainly due to the interaction with enzyme targets involved in toxicological or detoxication pathways. In this work, the toxicological relevance of known OPs targets is reviewed. The main enzyme targets of OPs have been identified among the serine hydrolase protein family, some of them decades ago (e.g. AChE, BuChE, NTE and carboxylesterases), others more recently (e.g. lysophospholipase, arylformidase and KIA1363) and others which are not molecularly identified yet (e.g. phenylvalerate esterases). Members of this family are characterized by displaying serine hydrolase activity, containing a conserved serine hydrolase motif and having an alpha-beta hydrolase fold. Improvement in Xray-crystallography and in silico methods have generated new data of the interactions between OPs and esterases and have established new methods to study new inhibitors and reactivators of cholinesterases. Mass spectrometry for AChE, BChE and APH have characterized the active site serine adducts with OPs being useful to detect biomarkers of OPs exposure and inhibitory and postinhibitory reactions of esterases and OPs. The purpose of this review is focus specifically on the interaction of OP with esterases, mainly with type B-esterases, which are able to hydrolyze carboxylesters but inhibited by OPs by covalent phosphorylation on the serine or tyrosine residue in the active sites. Other related esterases in some cases with no-irreversible effect are also discussed. The understanding of the multiple molecular interactions is the basis we are proposing for a multi-target approach for understanding the organophosphorus toxicity.

PMID: 27311923 [PubMed - indexed for MEDLINE]