RGD Reference Report - Cloning and expression of a cDNA encoding human sterol carrier protein 2. - Rat Genome Database

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Cloning and expression of a cDNA encoding human sterol carrier protein 2.

Authors: Yamamoto, R  Kallen, CB  Babalola, GO  Rennert, H  Billheimer, JT  Strauss JF, 3RD 
Citation: Yamamoto R, etal., Proc Natl Acad Sci U S A. 1991 Jan 15;88(2):463-7.
RGD ID: 8554045
Pubmed: PMID:1703300   (View Abstract at PubMed)
PMCID: PMC50831   (View Article at PubMed Central)

We report the cloning and expression of a cDNA encoding human sterol carrier protein 2 (SCP2). The 1.3-kilobase (kb) cDNA contains an open reading frame which encompasses a 143-amino acid sequence which is 89% identical to the rat SCP2 amino acid sequence. The deduced amino acid sequence of the polypeptide reveals a 20-residue amino-terminal leader sequence in front of the mature polypeptide, which contains a carboxyl-terminal tripeptide (Ala-Lys-Leu) related to the peroxisome targeting sequence. The expressed cDNA in COS-7 cells yields a 15.3-kDa polypeptide and increased amounts of a 13.2-kDa polypeptide, both reacting with a specific rabbit antiserum to rat liver SCP2. The cDNA insert hybridizes with 3.2- and 1.8-kb mRNA species in human liver poly(A)+ RNA. In human fibroblasts and placenta the 1.8-kb mRNA was most abundant. Southern blot analysis suggests either that there are multiple copies of the SCP2 gene in the human genome or that the SCP2 gene is very large. Coexpression of the SCP2 cDNA with expression vectors for cholesterol side-chain cleavage enzyme and adrenodoxin resulted in a 2.5-fold enhancement of progestin synthesis over that obtained with expression of the steroidogenic enzyme system alone. These findings are concordant with the notion that SCP2 plays a role in regulating steroidogenesis, among other possible functions.



Gene Ontology Annotations    Click to see Annotation Detail View

Biological Process

  
Object SymbolSpeciesTermQualifierEvidenceWithNotesSourceOriginal Reference(s)
Scp2Ratpositive regulation of steroid biosynthetic process involved_inIDA PMID:1703300UniProt 

Objects Annotated

Genes (Rattus norvegicus)
Scp2  (sterol carrier protein 2)


Additional Information