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Overview

Uniprot IDP11598
Protein NameProtein disulfide-isomerase A3
Gene NamePdia3
OrganismRattus norvegicus

Kla Sites from experimental identification

Position Flanking peptide
130 GIVSHLKKQAGPASV
218 LANKFEDKIVAYTEK
225 KIVAYTEKKMTSGKI
335 IRTAKGEKFVMQEEF
366 GNLKRYLKSEPIPET

Function

Protein disulfide isomerase that catalyzes the formation, isomerization, and reduction or oxidation of disulfide bonds in client proteins and functions as a protein folding chaperone. Core component of the major histocompatibility complex class I (MHC I) peptide loading complex where it functions as an essential folding chaperone for TAPBP. Through TAPBP, assists the dynamic assembly of the MHC I complex with high affinity antigens in the endoplasmic reticulum. Therefore, plays a crucial role in the presentation of antigens to cytotoxic T cells in adaptive immunity

Protein Sequence

10 MRFSCLALLP 20 GVALLLASAL 30 LASASDVLEL 40 TDENFESRVS 50 DTGSAGLMLV 60 EFFAPWCGHC 70 KRLAPEYEAA 80 ATRLKGIVPL 90 AKVDCTANTN 100 TCNKYGVSGY 110 PTLKIFRDGE 120 EAGAYDGPRT 130 ADGIVSHLKK 140 QAGPASVPLR 150 TEDEFKKFIS 160 DKDASVVGFF 170 RDLFSDGHSE 180 FLKAASNLRD 190 NYRFAHTNVE 200 SLVKEYDDNG 210 EGITIFRPLH 220 LANKFEDKIV 230 AYTEKKMTSG 240 KIKKFIQESI 250 FGLCPHMTED 260 NKDLIQGKDL 270 LTAYYDVDYE 280 KNTKGSNYWR 290 NRVMMVAKTF 300 LDAGHKLNFA 310 VASRKTFSHE 320 LSDFGLESTT 330 GEIPVVAIRT 340 AKGEKFVMQE 350 EFSRDGKALE 360 RFLQEYFDGN 370 LKRYLKSEPI 380 PETNEGPVKV 390 VVAESFDDIV 400 NAEDKDVLIE 410 FYAPWCGHCK 420 NLEPKYKELG 430 EKLSKDPNIV 440 IAKMDATAND 450 VPSPYEVKGF 460 PTIYFSPANK 470 KLTPKKYEGG 480 RELNDFISYL 490 QREATNPPII 500 QEEKPKKKKK AQEDL

Gene Ontology

Classification GO ID Description
Cellular Component GO:0001669 acrosomal vesicle
Cellular Component GO:0016324 apical plasma membrane
Cellular Component GO:0009986 cell surface
Cellular Component GO:0005783 endoplasmic reticulum
Cellular Component GO:0005788 endoplasmic reticulum lumen
Cellular Component GO:0005576 extracellular region
Cellular Component GO:0005615 extracellular space
Cellular Component GO:0042470 melanosome
Cellular Component GO:0042824 MHC class I peptide loading complex
Cellular Component GO:0005790 smooth endoplasmic reticulum
Cellular Component GO:0042825 TAP complex
Cellular Component GO:0061779 Tapasin-ERp57 complex
Molecular Function GO:0042802 identical protein binding
Molecular Function GO:0106222 lncRNA binding
Molecular Function GO:0042288 MHC class I protein binding
Molecular Function GO:0008233 peptidase activity
Molecular Function GO:0003756 protein disulfide isomerase activity
Molecular Function GO:0044183 protein folding chaperone
Molecular Function GO:0019153 protein-disulfide reductase (glutathione) activity
Molecular Function GO:0015035 protein-disulfide reductase activity
Biological Process GO:0002250 adaptive immune response
Biological Process GO:0098761 cellular response to interleukin-7
Biological Process GO:1904148 cellular response to nonylphenol
Biological Process GO:0071560 cellular response to transforming growth factor beta stimulus
Biological Process GO:0071305 cellular response to vitamin D
Biological Process GO:0007623 circadian rhythm
Biological Process GO:0002502 peptide antigen assembly with MHC class I protein complex
Biological Process GO:0070527 platelet aggregation
Biological Process GO:2001238 positive regulation of extrinsic apoptotic signaling pathway
Biological Process GO:1903334 positive regulation of protein folding
Biological Process GO:0006457 protein folding
Biological Process GO:1901423 response to benzene
Biological Process GO:0034976 response to endoplasmic reticulum stress
Biological Process GO:0045471 response to ethanol
Biological Process GO:0033595 response to genistein
Biological Process GO:0055093 response to hyperoxia
Biological Process GO:0001666 response to hypoxia
Biological Process GO:0002931 response to ischemia
Biological Process GO:0044321 response to leptin
Biological Process GO:0031667 response to nutrient levels

Reference

[1] Chen Y, Sun W, Sun Z, Zhao H, Wu T et al.. Effect of electroacupuncture on hippocampal protein lactylation in a rat model of vascular dementia.. Front Neurol 16:1629474. 2025. PMID: 40963935.