ID PPIB_ORPSP Reviewed; 203 AA. AC Q01490; DT 17-JAN-2003, integrated into UniProtKB/Swiss-Prot. DT 01-NOV-1996, sequence version 1. DT 22-SEP-2009, entry version 56. DE RecName: Full=Peptidyl-prolyl cis-trans isomerase B; DE Short=PPIase; DE Short=Rotamase; DE EC=5.2.1.8; DE AltName: Full=Cyclophilin B; DE Flags: Precursor; GN Name=CYPB; OS Orpinomyces sp. (strain PC-2). OC Eukaryota; Fungi; Neocallimastigomycota; Neocallimastigomycetes; OC Neocallimastigales; Neocallimastigaceae; Orpinomyces. OX NCBI_TaxID=50059; RN [1] RP NUCLEOTIDE SEQUENCE [MRNA], AND PROTEIN SEQUENCE OF 23-52. RX MEDLINE=95223986; PubMed=7708690; DOI=10.1073/pnas.92.7.2587; RA Chen H., Li X.-L., Ljungdahl L.G.; RT "A cyclophilin from the polycentric anaerobic rumen fungus Orpinomyces RT sp. strain PC-2 is highly homologous to vertebrate cyclophilin B."; RL Proc. Natl. Acad. Sci. U.S.A. 92:2587-2591(1995). CC -!- FUNCTION: PPIases accelerate the folding of proteins. It catalyzes CC the cis-trans isomerization of proline imidic peptide bonds in CC oligopeptides. CC -!- CATALYTIC ACTIVITY: Peptidylproline (omega=180) = peptidylproline CC (omega=0). CC -!- ENZYME REGULATION: Inhibited by cyclosporin A (CsA). CC -!- SUBCELLULAR LOCATION: Endoplasmic reticulum lumen (By similarity). CC -!- SIMILARITY: Belongs to the cyclophilin-type PPIase family. PPIase CC B subfamily. CC -!- SIMILARITY: Contains 1 PPIase cyclophilin-type domain. CC --------------------------------------------------------------------------- CC Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms CC Distributed under the Creative Commons Attribution (CC BY 4.0) License CC --------------------------------------------------------------------------- DR EMBL; U17900; AAD04195.1; -; mRNA. DR HSSP; P23284; 1CYN. DR SMR; Q01490; 26-193. DR GO; GO:0005788; C:endoplasmic reticulum lumen; IEA:UniProtKB-SubCell. DR GO; GO:0042277; F:peptide binding; IEA:UniProtKB-KW. DR GO; GO:0003755; F:peptidyl-prolyl cis-trans isomerase activity; IEA:UniProtKB-KW. DR GO; GO:0006457; P:protein folding; IEA:UniProtKB-KW. DR InterPro; IPR002130; PPIase_cyclophilin. DR Gene3D; G3DSA:2.40.100.10; PPIase_cyclophilin; 1. DR Pfam; PF00160; Pro_isomerase; 1. DR PRINTS; PR00153; CSAPPISMRASE. DR PROSITE; PS00170; CSA_PPIASE_1; 1. DR PROSITE; PS50072; CSA_PPIASE_2; 1. PE 1: Evidence at protein level; KW Cyclosporin; Direct protein sequencing; Endoplasmic reticulum; KW Isomerase; Rotamase; Signal. FT SIGNAL 1 22 FT CHAIN 23 203 Peptidyl-prolyl cis-trans isomerase B. FT /FTId=PRO_0000025485. FT DOMAIN 33 190 PPIase cyclophilin-type. FT MOTIF 200 203 Prevents secretion from ER (By FT similarity). FT BINDING 147 147 Cyclosporin A (Potential). SQ SEQUENCE 203 AA; 21969 MW; A5748C94305B8BE0 CRC64; MNFSIKSVIF LAIVALATLV SASTNPKVTN KVYFDIKQGD KDLGRIVLGL YGEVVPKTVE NFRALATGEK GYGYKNSKFH RVIKDFMIQG GDFTRGDGTG GKSIYGERFA DENFKLRHTG PGILSMANAG RDTNGSQFFI TTVTTSWLDG RHVVFGKVIE GMDVVTAIET TKTLPGDRPA TPVIIADCGE LPVSNNNDAK AEL //