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Ano de início
Entree

Resolving mechanistic details of peptide transport across membranes using crystallographic and non-crystallographic structural biology approaches

Processo: 15/50366-7
Linha de fomento:Auxílio à Pesquisa - Regular
Vigência: 01 de novembro de 2015 - 31 de outubro de 2020
Área do conhecimento:Ciências Biológicas - Biofísica - Biofísica Molecular
Convênio/Acordo: BBSRC, UKRI
Pesquisador responsável:Antonio José da Costa Filho
Beneficiário:Antonio José da Costa Filho
Pesq. responsável no exterior: Anthony Watts
Instituição no exterior: University of Oxford, Inglaterra
Instituição-sede: Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto (FFCLRP). Universidade de São Paulo (USP). Ribeirão Preto , SP, Brasil
Assunto(s):Cristalografia 
Publicação FAPESP:https://media.fapesp.br/bv/uploads/pdfs/fapesp_uk_r7AhoD2_18_18.pdf

Resumo

Extending our recent new crystallographic structural models, ESR DEER and MD (Fowler et al., (2015) Structure, 23(2):290- 301 - front cover feature), we now aim to define the reaction coordinates for two peptide transporters from the bacteria Shewanella oniedensis (PepTSo) and from Streptococcus thermophilus (PepTSt). Both the conformational changes associated with discernible Intermediates in the transporter pathway(s), as well as the lipid dependence of the various stages are currently not described, and so will be addressed here using underpinning molecular biology approaches in Oxford and Sao Paulo. The response of the transporter to the proton motive force (pmf) in sealed systems, and the nature of the ligand binding environment, will also be examined, giving new Information about direct coupung of peptide transport to the energetics that drives function, with a view to defining electromechanical coupling within this important drug facilitator. To do this we will: - direct the design of spectroscopic studies of membrane-embedded peptide transporters using currently available, as well as new crystal structural and MD generated models; - use the spectroscopic and functional Information to determine conformational and dynamic details of membrane- embedded transporters, and generate novel detailed molecular models of reaction intermediates; With a final goal of describing the mechanism of action, lipid dependence and conformations of reaction intermediate states of peptide (and other homologues) transporters in molecular and kinetic detail. (AU)

Publicações científicas (7)
(Referências obtidas automaticamente do Web of Science e do SciELO, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores)
MENDES, LUIS FELIPE S.; BATISTA, MARIANA R. B.; JUDGE, PETER J.; WATTS, ANTHONY; REDFIELD, CHRISTINA; COSTA-FILHO, ANTONIO J. Conformational flexibility of GRASPs and their constituent PDZ subdomains reveals structural basis of their promiscuous interactome. FEBS Journal, JAN 2020. Citações Web of Science: 0.
BATISTA, MARIANA R. B.; WATTS, ANTHONY; COSTA-FILHO, ANTONIO JOSE. Exploring Conformational Transitions and Free-Energy Profiles of Proton-Coupled Oligopeptide Transporters. JOURNAL OF CHEMICAL THEORY AND COMPUTATION, v. 15, n. 11, p. 6433-6443, NOV 2019. Citações Web of Science: 0.
MENDES, LUIS F. S.; FONTANA, NATALIA A.; OLIVEIRA, CAROLINA G.; FREIRE, MARJORIE C. L. C.; LOPES, JOSE L. S.; MELO, FERNANDO A.; COSTA-FILHO, ANTONIO J. The GRASP domain in golgi reassembly and stacking proteins: differences and similarities between lower and higher Eukaryotes. FEBS Journal, v. 286, n. 17, p. 3340-3358, SEP 2019. Citações Web of Science: 2.
THIRUPATHI REDDY, S.; SANTOS MENDES, LUIS FELIPE; FONTANA, NATALIA APARECIDA; COSTA-FILHO, ANTONIO JOSE. Exploring structural aspects of the human Golgi matrix protein GRASP55 in solution. International Journal of Biological Macromolecules, v. 135, p. 481-489, AUG 15 2019. Citações Web of Science: 0.
FONTANA, N. A.; FONSECA-MALDONADO, R.; MENDES, L. F. S.; MELEIRO, L. P.; COSTA-FILHO, A. J. The yeast GRASP Grh1 displays a high polypeptide backbone mobility along with an amyloidogenic behavior. SCIENTIFIC REPORTS, v. 8, OCT 24 2018. Citações Web of Science: 3.
MENDES, LUIS F. S.; BASSO, LUIS G. M.; KUMAGAI, PATRICIA S.; FONSECA-MALDONADO, RAQUEL; COSTA-FILHO, ANTONIO J. Disorder-to-order transitions in the molten globule-like Golgi Reassembly and Stacking Protein. BIOCHIMICA ET BIOPHYSICA ACTA-GENERAL SUBJECTS, v. 1862, n. 4, p. 855-865, APR 2018. Citações Web of Science: 3.
MICHELETTO, MARIANA C.; MENDES, LUIS F. S.; BASSO, LUIS G. M.; FONSECA-MALDONADO, RAQUEL G.; COSTA-FILHO, ANTONIO J. Lipid membranes and acyl-CoA esters promote opposing effects on acyl-CoA binding protein structure and stability. International Journal of Biological Macromolecules, v. 102, p. 284-293, SEP 2017. Citações Web of Science: 2.

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