Javascript is not enabled on this browser. This site will not work properly without Javascript.
PhosphoSitePlus Homepage Cell Signaling Technology
PhosphoSitePlus
HomeAbout PhosphoSiteUsing PhosphoSiteCuration ProcessContact
NIH-logos NIGMS Logo NIAAA Logo NCI Logo NIH Logo
Protein Page:
PDIA1 (human)
p Phosphorylation
a Acetylation
m Methylation
m1 Mono-methylation
m2 Di-methylation
m3 Tri-methylation
u Ubiquitination
s Sumoylation
n Neddylation
gl O-GlcNAc
ga O-GalNAc
h Palmitoylation
ad Adenylylation
sn S-Nitrosylation
ca Caspase cleavage

Overview
PDIA1 This multifunctional protein catalyzes the formation, breakage and rearrangement of disulfide bonds. At the cell surface, seems to act as a reductase that cleaves disulfide bonds of proteins attached to the cell. May therefore cause structural modifications of exofacial proteins. Inside the cell, seems to form/rearrange disulfide bonds of nascent proteins. At high concentrations, functions as a chaperone that inhibits aggregation of misfolded proteins. At low concentrations, facilitates aggregation (anti-chaperone activity). May be involved with other chaperones in the structural modification of the TG precursor in hormone biogenesis. Also acts a structural subunit of various enzymes such as prolyl 4-hydroxylase and microsomal triacylglycerol transfer protein MTTP. Homodimer. Monomers and homotetramers may also occur. Also constitutes the structural subunit of prolyl 4-hydroxylase and of the microsomal triacylglycerol transfer protein MTTP in mammalian cells. Stabilizes both enzymes and retain them in the ER without contributing to the catalytic activity. Binds UBQLN1. Binds to CD4, and upon HIV-1 binding to the cell membrane, is part of a P4HB/PDI-CD4-CXCR4-gp120 complex. Belongs to the protein disulfide isomerase family. Note: This description may include information from UniProtKB.
Protein type: Isomerase; EC 5.3.4.1; Endoplasmic reticulum; Oxidoreductase
Cellular Component: endoplasmic reticulum lumen; endoplasmic reticulum; extracellular region; melanosome; ER-Golgi intermediate compartment; plasma membrane
Molecular Function: protein binding; procollagen-proline 4-dioxygenase activity; protein heterodimerization activity; protein disulfide oxidoreductase activity; protein disulfide isomerase activity
Biological Process: extracellular matrix organization and biogenesis; cell redox homeostasis; lipoprotein metabolic process; peptidyl-proline hydroxylation to 4-hydroxy-L-proline; glycerol ether metabolic process
Reference #:  P07237 (UniProtKB)
Alt. Names/Synonyms: Cellular thyroid hormone-binding protein; collagen prolyl 4-hydroxylase beta; DSI; ERBA2L; GIT; glutathione-insulin transhydrogenase; P4HB; P4Hbeta; p55; PDI; PDIA1; PHDB; PO4DB; PO4HB; procollagen-proline, 2-oxoglutarate 4-dioxygenase (proline 4-hydroxylase), beta polypeptide; PROHB; Prolyl 4-hydroxylase subunit beta; prolyl 4-hydroxylase, beta polypeptide; protein disulfide isomerase family A, member 1; protein disulfide isomerase-associated 1; protein disulfide isomerase/oxidoreductase; Protein disulfide-isomerase; protocollagen hydroxylase; thyroid hormone-binding protein p55; v-erb-a avian erythroblastic leukemia viral oncogene homolog 2-like
Gene Symbols: P4HB
Molecular weight: 57,116 Da
Basal Isoelectric point: 4.76  Predict pI for various phosphorylation states
Protein-Specific Antibodies or siRNAs from Cell Signaling Technology® Total Proteins
Select Structure to View Below

PDIA1

Protein Structure Not Found.


STRING  |  Scansite  |  Phospho.ELM  |  NetworKIN  |  Pfam  |  RCSB PDB  |  ENZYME  |  Phospho3D  |  Source  |  GeneCards  |  UniProtKB  |  Entrez-Gene  |  GenPept  |  Ensembl Gene


Modification Sites and Domains Show Modification Legend
Click here to view phosphorylation modifications only

Modification Sites in Parent Protein, Orthologs, and Isoforms Show Modification Legend
 

Show Multiple Sequence Alignment


 SS 

SS: The number of records in which this modification site was determined using site-specific methods. SS methods include amino acid sequencing, site-directed mutagenesis, modification site-specific antibodies, specific MS strategies, etc.


 MS 

MS: The number of records in which this modification site was assigned using ONLY proteomic discovery-mode mass spectrometry.


       human

 
0 1 K31 DHVLVLRKSNFAEAL
0 2 Y43-p EALAAHKyLLVEFYA
0 1 K65 ALAPEYAKAAGKLKA
0 14 K81-u GSEIRLAkVDATEES
0 4 K103-a VRGYPTIkFFRNGDT
0 1 K103-u VRGYPTIkFFRNGDT
0 3 R106 YPTIkFFRNGDTASP
0 1 R106 YPTIkFFRNGDTASP
0 1 S112 FRNGDTASPKEYTAG
0 1 K130 DDIVNWLKKRTGPAA
0 2 K200-u FSKYQLDkDGVVLFK
0 6 K208-a DGVVLFKkFDEGRNN
0 1 K222 NFEGEVTKENLLDFI
0 2 K222-u NFEGEVTkENLLDFI
0 1 N224 EGEVTkENLLDFIKH
0 1 T255 IFGGEIKTHILLFLP
0 2 K271-u SVSDYDGkLSNFKTA
0 5 K276 DGkLSNFKTAAESFk
0 9 K283-a KTAAESFkGKILFIF
0 20 K308-a ILEFFGLkKEECPAV
0 2 K308-u ILEFFGLkKEECPAV
0 1 T340 ELTAERITEFCHRFL
0 16 K375-a PVKVLVGkNFEDVAF
0 1 K375-u PVKVLVGkNFEDVAF
0 6 K385-a EDVAFDEkKNVFVEF
0 1 K385 EDVAFDEKKNVFVEF
0 1 K409-a QLAPIWDkLGETYKD
0 1 T442 VKVHSFPTLkFFPAS
0 1 T442-ga VKVHSFPtLkFFPAS
0 12 K444-a VHSFPtLkFFPASAD
0 2 K444-u VHSFPtLkFFPASAD
0 3 Y457-p ADRTVIDyNGERTLD
0 6 K467 ERTLDGFKKFLESGG
  mouse

 
K33-u DNVLVLKkSNFEEAL
Y45 EALAAHKYLLVEFYA
K67-u ALAPEYAkAAAKLKA
K83-u GSEIRLAkVDATEES
K105 VRGYPTIKFFkNGDT
K105 VRGYPTIKFFkNGDT
K108-a YPTIKFFkNGDTAsP
K108-u YPTIKFFkNGDTAsP
S114-p FkNGDTAsPKEYTAG
K132-u DDIVNWLkKRTGPAA
K202-u FSKYQLDkDGVVLFK
K210-a DGVVLFKkFDEGRNN
K224-a NFEGEITkEkLLDFI
K224 NFEGEITKEkLLDFI
K226-u EGEITkEkLLDFIKH
T257-p IFGGEIKtHILLFLP
K273-u SVSDYDGkLSSFkRA
K278-a DGkLSSFkRAAEGFk
K285-a kRAAEGFkGKILFIF
K310-a ILEFFGLkKEECPAV
K310-u ILEFFGLkKEECPAV
T342 ELTAEKITEFCHRFL
A377 PVKVLVGANFEEVAF
A377 PVKVLVGANFEEVAF
K387-a EEVAFDEkKNVFVEF
K387-u EEVAFDEkKNVFVEF
K411 QLAPIWDKLGETYKD
T444-p VKVHSFPtLkFFPAS
T444 VKVHSFPTLkFFPAS
K446 VHSFPtLKFFPASAD
K446-u VHSFPtLkFFPASAD
Y459 ADRTVIDYNGERTLD
K469-a ERTLDGFkKFLESGG
  rat

 
K33 DNVLVLKKSNFAEAL
Y45 EALAAHNYLLVEFYA
K67 ALAPEYAKAAAKLKA
K83 GSEIRLAKVDATEES
K105 VRGYPTIKFFKNGDT
K105 VRGYPTIKFFKNGDT
K108 YPTIKFFKNGDTASP
K108 YPTIKFFKNGDTASP
S114 FKNGDTASPKEYTAG
K132 DDIVNWLKKRTGPAA
K202 FSKYQLDKDGVVLFK
K210 DGVVLFKKFDEGRNN
K224 NFEGEITKEKLLDFI
K224 NFEGEITKEKLLDFI
K226 EGEITKEKLLDFIKH
T257 IFGGEIKTHILLFLP
K273 SVSDYDGKLSNFKKA
K278 DGKLSNFKKAAEGFK
K285 KKAAEGFKGKILFIF
K310 ILEFFGLKKEECPAV
K310 ILEFFGLKKEECPAV
T342-p ELTAEKItQFCHHFL
K377 PVKVLVGKNFEEVAF
K377 PVKVLVGKNFEEVAF
K387 EEVAFDEKKNVFVEF
K387 EEVAFDEKKNVFVEF
K411 QLAPIWDKLGETYKD
T444 VKVHSFPTLKFFPAS
T444 VKVHSFPTLKFFPAS
K446 VHSFPTLKFFPASAD
K446 VHSFPTLKFFPASAD
Y459 ADRTVIDYNGERTLD
K469 ERTLDGFKKFLESGG
Home  |  Curator Login With enhanced literature mining using Linguamatics I2E I2E Logo Produced by 3rd Millennium  |  Design by Digizyme
©2003-2013 Cell Signaling Technology, Inc.