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4EKZ

Crystal structure of reduced hPDI (abb'xa')

Functional Information from GO Data
ChainGOidnamespacecontents
A0003723molecular_functionRNA binding
A0003756molecular_functionprotein disulfide isomerase activity
A0003779molecular_functionactin binding
A0004656molecular_functionprocollagen-proline 4-dioxygenase activity
A0005178molecular_functionintegrin binding
A0005515molecular_functionprotein binding
A0005576cellular_componentextracellular region
A0005783cellular_componentendoplasmic reticulum
A0005788cellular_componentendoplasmic reticulum lumen
A0005793cellular_componentendoplasmic reticulum-Golgi intermediate compartment
A0005829cellular_componentcytosol
A0005856cellular_componentcytoskeleton
A0005886cellular_componentplasma membrane
A0005925cellular_componentfocal adhesion
A0006457biological_processprotein folding
A0009897cellular_componentexternal side of plasma membrane
A0015035molecular_functionprotein-disulfide reductase activity
A0016222cellular_componentprocollagen-proline 4-dioxygenase complex
A0016853molecular_functionisomerase activity
A0016972molecular_functionthiol oxidase activity
A0018401biological_processpeptidyl-proline hydroxylation to 4-hydroxy-L-proline
A0019899molecular_functionenzyme binding
A0030027cellular_componentlamellipodium
A0030070biological_processinsulin processing
A0032991cellular_componentprotein-containing complex
A0034663cellular_componentendoplasmic reticulum chaperone complex
A0034975biological_processprotein folding in endoplasmic reticulum
A0034976biological_processresponse to endoplasmic reticulum stress
A0035722biological_processinterleukin-12-mediated signaling pathway
A0038155biological_processinterleukin-23-mediated signaling pathway
A0042470cellular_componentmelanosome
A0044877molecular_functionprotein-containing complex binding
A0045785biological_processpositive regulation of cell adhesion
A0046598biological_processpositive regulation of viral entry into host cell
A0046982molecular_functionprotein heterodimerization activity
A0070062cellular_componentextracellular exosome
A0071456biological_processcellular response to hypoxia
A1900026biological_processpositive regulation of substrate adhesion-dependent cell spreading
A1902175biological_processregulation of oxidative stress-induced intrinsic apoptotic signaling pathway
A2000406biological_processpositive regulation of T cell migration
Functional Information from PROSITE/UniProt
site_idPS00194
Number of Residues19
DetailsTHIOREDOXIN_1 Thioredoxin family active site. LVeFYapWCGHCKaLapeY
ChainResidueDetails
ALEU45-TYR63
APHE389-TRP407

Functional Information from SwissProt/UniProt
site_idSWS_FT_FI1
Number of Residues116
DetailsDomain: {"description":"Thioredoxin 1","evidences":[{"source":"PROSITE-ProRule","id":"PRU00691","evidenceCode":"ECO:0000255"}]}
ChainResidueDetails

site_idSWS_FT_FI2
Number of Residues126
DetailsDomain: {"description":"Thioredoxin 2","evidences":[{"source":"PROSITE-ProRule","id":"PRU00691","evidenceCode":"ECO:0000255"}]}
ChainResidueDetails

site_idSWS_FT_FI3
Number of Residues2
DetailsActive site: {"description":"Nucleophile"}
ChainResidueDetails

site_idSWS_FT_FI4
Number of Residues2
DetailsActive site: {"description":"Nucleophile","evidences":[{"evidenceCode":"ECO:0000250"}]}
ChainResidueDetails

site_idSWS_FT_FI5
Number of Residues2
DetailsSite: {"description":"Contributes to redox potential value"}
ChainResidueDetails

site_idSWS_FT_FI6
Number of Residues1
DetailsSite: {"description":"Lowers pKa of C-terminal Cys of first active site"}
ChainResidueDetails

site_idSWS_FT_FI7
Number of Residues2
DetailsSite: {"description":"Contributes to redox potential value","evidences":[{"evidenceCode":"ECO:0000250"}]}
ChainResidueDetails

site_idSWS_FT_FI8
Number of Residues1
DetailsSite: {"description":"Lowers pKa of C-terminal Cys of second active site","evidences":[{"evidenceCode":"ECO:0000250"}]}
ChainResidueDetails

site_idSWS_FT_FI9
Number of Residues1
DetailsModified residue: {"description":"N6-acetyllysine","evidences":[{"source":"UniProtKB","id":"P09103","evidenceCode":"ECO:0000250"}]}
ChainResidueDetails

site_idSWS_FT_FI10
Number of Residues2
DetailsModified residue: {"description":"N6-succinyllysine","evidences":[{"source":"UniProtKB","id":"P09103","evidenceCode":"ECO:0000250"}]}
ChainResidueDetails

site_idSWS_FT_FI11
Number of Residues2
DetailsModified residue: {"description":"Phosphoserine","evidences":[{"source":"PubMed","id":"32149426","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails

site_idSWS_FT_FI12
Number of Residues1
DetailsModified residue: {"description":"Phosphoserine; by FAM20C","evidences":[{"source":"PubMed","id":"26091039","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"32149426","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails

Catalytic Information from CSA
site_idMCSA1
Number of Residues4
DetailsM-CSA 191
ChainResidueDetails
ACYS53nucleofuge, nucleophile, proton acceptor, proton donor
AGLY54activator, modifies pKa
AHIS55modifies pKa, proton acceptor, proton donor
ACYS56

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PDB entries from 2025-12-24

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