Tag Content
SG ID
SG00011525 
UniProt Accession
Theoretical PI
9.42  
Molecular Weight
23713 Da  
Genbank Nucleotide ID
Genbank Protein ID
Gene Name
Ppib 
Gene Synonyms/Alias
 
Protein Name
Peptidyl-prolyl cis-trans isomerase B 
Protein Synonyms/Alias
PPIase BEC=5.2.1.8 CYP-S1; Cyclophilin B; Rotamase B; S-cyclophilin;SCYLPFlags: Precursor 
Organism
Mus musculus (Mouse) 
NCBI Taxonomy ID
10090 
Chromosome Location
chr:9;65907976-65914436;1
View in Ensembl genome browser  
Function in Stage
Uncertain 
Function in Cell Type
Uncertain 
Probability (GAS) of Function in Spermatogenesis
0.062421447 
The probability was calculated by GAS algorithm, ranging from 0 to 1. The closer it is to 1, the more possibly it functions in spermatogenesis.
Description
Temporarily unavailable 
Abstract of related literatures
1. Cyclophilin is a ubiquitously expressed cytosolic peptidyl-prolyl cis-trans isomerase that is inhibited by the immunosuppressive drug cyclosporin A. A degenerate oligonucleotide based on a conserved cyclophilin sequence was used to isolate cDNA clones representing a ubiquitously expressed mRNA from mice and humans. This mRNA encodes a novel 20-kDa protein, CPH2, that shares 64% sequence identity with cyclophilin. Bacterially expressed CPH2 binds cyclosporin A and is a cyclosporin A-inhibitable peptidyl-prolyl cis-trans isomerase. Cell fractionation of rat liver followed by Western blot (immunoblot) analysis indicated that CPH2 is not cytosolic but rather is located exclusively in the endoplasmic reticulum. These results suggest that cyclosporin A mediates its effect on cells through more than one cyclophilin and that cyclosporin A-induced misfolding of T-cell membrane proteins normally mediated by CPH2 plays a role in immunosuppression. PMID: [1710767] 

2. Fractionation of differentiating murine teratocarcinoma F9 cells and extraction of the nuclear/microsomal pellets with ethidium bromide led to the purification and microsequencing of the protein mCyP-S1, a novel cyclosporin A-sensitive peptidyl-prolyl cis-trans isomerase (PPIase). mCyP-S1 is a new member of the cyclophilin class of proteins. Cloning and sequencing of the mCyP-S1 cDNA revealed extended coding capacity for a putative N-terminal signal sequence, suggesting processing of mCyP-S1 during intracellular translocation across the membrane of the endoplasmic reticulum. mCyP-S1 is abundantly expressed in a variety of mouse organ tissues and its mRNA levels increase during F9 cell differentiation. Specific subcellular localization of PPIases is postulated to contribute to functional specificities of this class of enzymes. PMID: [1756174] 

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Function
PPIases accelerate the folding of proteins. It catalyzesthe cis-trans isomerization of proline imidic peptide bonds inoligopeptides. 
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Subcellular Location
Endoplasmic reticulum lumen (By similarity).Melanosome (By similarity). 
Tissue Specificity
 
Gene Ontology
GO IDGO termEvidence
GO:0005788 C:endoplasmic reticulum lumen IEA:UniProtKB-SubCell.
GO:0042470 C:melanosome IEA:UniProtKB-SubCell.
GO:0042277 F:peptide binding IEA:UniProtKB-KW.
GO:0003755 F:peptidyl-prolyl cis-trans isomerase activity IEA:UniProtKB-KW.
GO:0006457 P:protein folding IEA:UniProtKB-KW.
GO:0000413 P:protein peptidyl-prolyl isomerization IEA:GOC.
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Interpro
IPR002130;    Cyclophilin-like_PPIase_dom.
IPR024936;    Cyclophilin-type_PPIase.
IPR020892;    Cyclophilin-type_PPIase_CS.
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Pfam
PF00160;    Pro_isomerase;    1.
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SMART
PROSITE
PS00170;    CSA_PPIASE_1;    1.
PS50072;    CSA_PPIASE_2;    1.
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PRINTS
PR00153;    CSAPPISMRASE.;   
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Created Date
18-Oct-2012 
Record Type
GAS predicted 
Sequence Annotation
SIGNAL        1     33       By similarity.
CHAIN        34    216       Peptidyl-prolyl cis-trans isomerase B.
                             /FTId=PRO_0000025480.
DOMAIN       47    204       PPIase cyclophilin-type.
MOTIF       213    216       Prevents secretion from ER (By
                             similarity).
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Nucleotide Sequence
Length: 873 bp   Go to nucleotide: FASTA
Protein Sequence
Length: 216 bp   Go to amino acid: FASTA
The verified Protein-Protein interaction information
UniProt
Gene Symbol Ref Databases
AppIntAct 
AldoaIntAct 
Amy1IntAct 
Other Protein-Protein interaction resources
String database  
View Microarray data
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