PDI Proteins

Protein Information

Protein disulfide isomerase (PDI) is a multifunctional protein that catalyzes the formation, breakage and rearrangement of disulfide bonds. At the cell surface, the protein seems to act as a reductase that cleaves disulfide bonds of proteins attached to the cell. It may therefore cause structural modifications of exofacial proteins. Inside the cell, PDI seems to form/rearrange disulfide bonds of nascent proteins. At high concentrations, it functions as a chaperone that inhibits aggregation of misfolded proteins. At low concentrations, it facilitates aggregation (anti-chaperone activity). PDI may be involved with other chaperones in the structural modification of the TG precursor in hormone biogenesis. It also acts a structural subunit of various enzymes such as prolyl 4-hydroxylase and microsomal triacylglycerol transfer protein MTTP. Receptor for LGALS9; the interaction retains P4HB at the cell surface of Th2 T helper cells, increasing disulfide reductase activity at the plasma membrane, altering the plasma membrane redox state and enhancing cell migration.

Synonyms

CaO19.12595; cellular thyroid hormone binding protein; cellular thyroid hormone-binding protein; CLCRP1; collagen prolyl 4-hydroxylase beta; DSI; endoplasmic reticulum resident protein 59; Eps1p; ER protein 59; ERBA2L; ERp59; GIT; glutathione-insulin transhydrogenase; I79_002399; MFP1; P4hb; p4hb.L; P4Hbeta; p55; p58; pancreas-specific protein disulfide isomerase; PDI; PDI (E.C.5.3.4.1); PDI1; PDI1P; Pdia1; pdia2; pdia2.L; pdip; PDIR; PHDB; PO4DB; PO4HB; procollagen-proline, 2-oxoglutarate 4-dioxygenase (proline 4-hydroxylase), beta polypeptide; PROHB; prolyl 4-hydroxylase beta polypeptide; Prolyl 4-hydroxylase subunit beta; prolyl 4-hydroxylase subunit beta L homeolog; prolyl 4-hydroxylase subunit beta L homeolog; prolyl 4-hydroxylase, beta polypeptide L homeolog; prolyl 4-hydroxylase, beta polypeptide; prolyl 4-hydroxylase, beta subunit; protein disulfide isomerase; Protein disulfide isomerase (Prolyl 4-hydroxylase, beta polypeptide); protein disulfide isomerase A2; protein disulfide isomerase family A member 2 L homeolog; protein disulfide isomerase family A, member 1; protein disulfide isomerase family A, member 2; protein disulfide isomerase PDI1; protein disulfide isomerase/oxidoreductase; protein disulfide isomerase-associated 1; protein disulfide-isomerase; protocollagen hydroxylase; testicular secretory protein Li 32; Thbp; Thioredoxin-related glycoprotein 1; thyroid hormone-binding protein p55; TRG1; XELAEV_18043753mg; XELAEV_18045582mg; XPDIp; YCL043C; YCL313; YCL43C