Advanced search
Start date
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Methods of measuring protein disulfide isomerase activity: a critical overview

Full text
Watanabe, Monica M. [1] ; Laurindo, Francisco R. M. [1] ; Fernandes, Denise C. [1]
Total Authors: 3
[1] Univ Sao Paulo, Sch Med, Vasc Biol Lab, Heart Inst InCor, Av Eneas C Aguiar 44, 9th Floor, BR-05403000 Sao Paulo - Brazil
Total Affiliations: 1
Document type: Review article
Source: FRONTIERS IN CHEMISTRY; v. 2, 2014.
Web of Science Citations: 16

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)

FAPESP's process: 13/07937-8 - Redoxome - Redox Processes in Biomedicine
Grantee:Ohara Augusto
Support type: Research Grants - Research, Innovation and Dissemination Centers - RIDC
FAPESP's process: 09/54764-6 - Regulation of redox homeostasis and integrated stress response by Protein Disulfide Isomerase (PDI): mechanisms and role in the pathophysiology and therapy of vascular diseases
Grantee:Francisco Rafael Martins Laurindo
Support type: Research Projects - Thematic Grants