U3BBD4 · U3BBD4_CALJA

Function

function

Mediates the transfer of all common phospholipids, cholesterol and gangliosides from the endoplasmic reticulum to the plasma membrane. May play a role in regulating steroidogenesis. Stimulates the microsomal conversion of 7-dehydrocholesterol to cholesterol. Also binds fatty acids and fatty acyl Coenzyme A (CoA) such as phytanoyl-CoA. Involved in the regulation phospholipid synthesis in endoplasmic reticulum enhancing the incorporation of exogenous fatty acid into glycerides. Seems to stimulate the rate-limiting step in phosphatidic acid formation mediated by GPAT3. Isoforms SCP2 and SCPx cooperate in peroxisomal oxidation of certain naturally occurring tetramethyl-branched fatty acyl-CoAs.
Plays a crucial role in the peroxisomal oxidation of branched-chain fatty acids. Catalyzes the last step of the peroxisomal beta-oxidation of branched chain fatty acids and the side chain of the bile acid intermediates di- and trihydroxycoprostanic acids (DHCA and THCA). Also active with medium and long straight chain 3-oxoacyl-CoAs. Stimulates the microsomal conversion of 7-dehydrocholesterol to cholesterol and transfers phosphatidylcholine and 7-dehydrocholesterol between membrances, in vitro. Isoforms SCP2 and SCPx cooperate in peroxisomal oxidation of certain naturally occurring tetramethyl-branched fatty acyl-CoAs.

Catalytic activity

  • 3-oxo-(9Z-octadecenoyl)-CoA + CoA = (7Z)-hexadecenoyl-CoA + acetyl-CoA
    This reaction proceeds in the forward direction.
  • 3-oxohexadecanedioyl-CoA + CoA = tetradecanedioyl-CoA + acetyl-CoA
    This reaction proceeds in the forward direction.
  • 4,8,12-trimethyltridecanoyl-CoA + propanoyl-CoA = 3-oxopristanoyl-CoA + CoA
    This reaction proceeds in the backward direction.
    EC:2.3.1.176 (UniProtKB | ENZYME | Rhea)
  • 7-dehydrocholesterol(in) = 7-dehydrocholesterol(out)
  • an acyl-CoA + acetyl-CoA = a 3-oxoacyl-CoA + CoA
    This reaction proceeds in the backward direction.
    EC:2.3.1.16 (UniProtKB | ENZYME | Rhea)
  • butanoyl-CoA + acetyl-CoA = 3-oxohexanoyl-CoA + CoA
    This reaction proceeds in the backward direction.
  • choloyl-CoA + propanoyl-CoA = 3alpha,7alpha,12alpha-trihydroxy-24-oxo-5beta-cholestan-26-oyl-CoA + CoA
    This reaction proceeds in the backward direction.
    EC:2.3.1.176 (UniProtKB | ENZYME | Rhea)
  • decanoyl-CoA + acetyl-CoA = 3-oxododecanoyl-CoA + CoA
    This reaction proceeds in the backward direction.
  • dodecanoyl-CoA + acetyl-CoA = 3-oxotetradecanoyl-CoA + CoA
    This reaction proceeds in the backward direction.
  • hexadecanoyl-CoA + acetyl-CoA = 3-oxooctadecanoyl-CoA + CoA
    This reaction proceeds in the backward direction.
  • hexanoyl-CoA + acetyl-CoA = 3-oxooctanoyl-CoA + CoA
    This reaction proceeds in the backward direction.
  • octanoyl-CoA + acetyl-CoA = 3-oxodecanoyl-CoA + CoA
    This reaction proceeds in the backward direction.
  • propanoyl-CoA + tetradecanoyl-CoA = 3-oxo-2-methylhexadecanoyl-CoA + CoA
    This reaction proceeds in the backward direction.
  • tetradecanoyl-CoA + acetyl-CoA = 3-oxohexadecanoyl-CoA + CoA
    This reaction proceeds in the backward direction.
    EC:2.3.1.155 (UniProtKB | ENZYME | Rhea)

GO annotations

AspectTerm
Cellular Componentperoxisome
Molecular Functionacetyl-CoA C-acyltransferase activity
Molecular Functionacetyl-CoA C-myristoyltransferase activity
Molecular Functionlipid binding
Molecular Functionpropanoyl-CoA C-acyltransferase activity
Molecular Functionpropionyl-CoA C2-trimethyltridecanoyltransferase activity
Biological Processlipid metabolic process
Biological Processlipid transport

Keywords

Enzyme and pathway databases

Names & Taxonomy

Protein names

  • Recommended name
    Sterol carrier protein 2
  • EC number
  • Alternative names
    • Acetyl-CoA C-myristoyltransferase
    • Non-specific lipid-transfer protein
    • Propanoyl-CoA C-acyltransferase
    • SCP-2/3-oxoacyl-CoA thiolase
    • SCP-2/thiolase

Gene names

    • Name
      SCP2

Organism names

  • Taxonomic identifier
  • Taxonomic lineage
    Eukaryota > Metazoa > Chordata > Craniata > Vertebrata > Euteleostomi > Mammalia > Eutheria > Euarchontoglires > Primates > Haplorrhini > Platyrrhini > Cebidae > Callitrichinae > Callithrix > Callithrix

Accessions

  • Primary accession
    U3BBD4

Subcellular Location

Cytoplasm
Peroxisome

Keywords

Interaction

Subunit

Interacts with PEX5; the interaction is essential for peroxisomal import.

Family & Domains

Features

Showing features for domain.

TypeIDPosition(s)Description
Domain14-239Thiolase N-terminal
Domain276-394Thiolase C-terminal
Domain434-535SCP2

Family and domain databases

Sequence

  • Sequence status
    Complete
  • Length
    544
  • Mass (Da)
    58,622
  • Last updated
    2013-11-13 v1
  • MD5 Checksum
    E0F162384AF39CD3CA0A1ECE67FC9E6C
MFSSLQELAPLRRVFVVGVGMTKFKKPGAENSRDYPDLAREAGQKALADAQIPYSAVDQACVGYVFGDSTCGQRAIYHSLGMTGIPIINVNNNCSTGSTALFVARQLIQGGVAECVLALGFEKMEKGGLGTKFLDRTSPLDKHLDLLINKYGLSAHPVAPQMFGLAGKEHIEKYGTKIEHFAKIGWKNHKHSVNNPYSQFQDEYSLDEVMASKKVFEFLTILQCCPTSDGAAAAILASEAFVQKYGLQPKAVEILAQEMMTDLPSSFEEKSMIKMVGFDMSKEAARKCYKKSGLTPSDIDVIELHDCFSANELLTYEALGLCPEGQGGTLVDRGDNTYGGKWVINPSGGLISKGHPLGATGLAQCAELCWQLRGEAGKRQVPGAKVALQHNLGLGGAVVVTLYKMGFPEAARTHQIEAAPTSSASDGFKANLVFKEIEKKLEEEGEQFVKKIGGIFAFKVKDGPGGKEATWVVDVKNGKGSVLPNSDKKADCTITMADSDLLALMTGKMNPQSAFFQGKLKITGNMGLAMKLQNLQLQPGKAKL

Sequence databases

Nucleotide SequenceProtein SequenceMolecule TypeStatus
GAMT01008399
EMBL· GenBank· DDBJ
JAB03462.1
EMBL· GenBank· DDBJ
mRNA
GAMR01005659
EMBL· GenBank· DDBJ
JAB28273.1
EMBL· GenBank· DDBJ
mRNA
GAMQ01004873
EMBL· GenBank· DDBJ
JAB36978.1
EMBL· GenBank· DDBJ
mRNA

Similar Proteins

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