Busca avançada
Ano de início
Entree
(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Methods of measuring protein disulfide isomerase activity: a critical overview

Texto completo
Autor(es):
Watanabe, Monica M. [1] ; Laurindo, Francisco R. M. [1] ; Fernandes, Denise C. [1]
Número total de Autores: 3
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Sch Med, Vasc Biol Lab, Heart Inst InCor, Av Eneas C Aguiar 44, 9th Floor, BR-05403000 Sao Paulo - Brazil
Número total de Afiliações: 1
Tipo de documento: Artigo de Revisão
Fonte: FRONTIERS IN CHEMISTRY; v. 2, 2014.
Citações Web of Science: 15
Resumo

Protein disulfide isomerase is an essential redox chaperone from the endoplasmic reticulum (ER) and is responsible for correct disulfide bond formation in nascent proteins. PDI is also found in other cellular locations in the cell, particularly the cell surface. Overall, PDI contributes to ER and global cell redox homeostasis and signaling. The knowledge about PDI structure and function progressed substantially based on in vitro studies using recombinant PDI and chimeric proteins. In these experimental scenarios, PDI reductase and chaperone activities are readily approachable. In contrast, assays to measure PDI isomerase activity, the hallmark of PDI family, are more complex. Assessment of PDI roles in cells and tissues mainly relies on gain- or loss-of-function studies. However, there is limited information regarding correlation of experimental readouts with the distinct types of PDI activities. In this mini-review, we evaluate the main methods described for measuring the different kinds of PDI activity: thiol reductase, thiol oxidase, thiol isomerase and chaperone. We emphasize the need to use appropriate controls and the role of critical interferents (e.g., detergent, presence of reducing agents). We also discuss the translation of results from in vitro studies with purified recombinant PDI to cellular and tissue samples, with critical comments on the interpretation of results. (AU)

Processo FAPESP: 13/07937-8 - Redoxoma
Beneficiário:Ohara Augusto
Linha de fomento: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs
Processo FAPESP: 09/54764-6 - Regulação da homeostase redox e resposta integrada a estresse pela dissulfeto isomerase protéica (PDI): mecanismos e papel na fisiopatologia e terapêutica de doenças vasculares
Beneficiário:Francisco Rafael Martins Laurindo
Linha de fomento: Auxílio à Pesquisa - Temático