Q3TXQ4 · Q3TXQ4_MOUSE

  • Protein
    NPC intracellular cholesterol transporter 2
  • Gene
    Npc2
  • Status
    UniProtKB unreviewed (TrEMBL)
  • Amino acids
  • Protein existence
    Evidence at transcript level
  • Annotation score
    2/5

Function

function

Intracellular cholesterol transporter which acts in concert with NPC1 and plays an important role in the egress of cholesterol from the lysosomal compartment. Unesterified cholesterol that has been released from LDLs in the lumen of the late endosomes/lysosomes is transferred by NPC2 to the cholesterol-binding pocket in the N-terminal domain of NPC1. May bind and mobilize cholesterol that is associated with membranes. NPC2 binds cholesterol with a 1:1 stoichiometry. Can bind a variety of sterols, including lathosterol, desmosterol and the plant sterols stigmasterol and beta-sitosterol. The secreted form of NCP2 regulates biliary cholesterol secretion via stimulation of ABCG5/ABCG8-mediated cholesterol transport.

GO annotations

all annotationsall molecular functionvirus receptor activitydna bindingrna bindingcytoskeletal motor activitycatalytic activitygtpase activitystructural molecule activitytransporter activitycytoskeletal protein bindinglipid bindingcyclase activityantioxidant activityoxidoreductase activitytransferase activityhydrolase activitylyase activityisomerase activityligase activityprotein tag activitycargo receptor activityhistone bindingprotein folding chaperonetranslation regulator activitynutrient reservoir activityreceptor ligand activitymolecular transducer activitymolecular adaptor activitytoxin activitycell adhesion mediator activitymolecular function regulator activityvirus coreceptor activitycatalytic activity, acting on a proteincatalytic activity, acting on dnacatalytic activity, acting on rnamolecular carrier activitytranscription regulator activitygeneral transcription initiation factor activitymolecular sensor activitymolecular sequestering activityatp-dependent activityother molecular functionall biological processmitotic cell cyclecytokinesiscytoplasmic translationimmune system processmuscle system processcirculatory system processrenal system processrespiratory system processcarbohydrate metabolic processgeneration of precursor metabolites and energydna replicationdna repairdna recombinationchromatin organizationdna-templated transcriptionregulation of dna-templated transcriptiontrna metabolic processprotein foldingprotein glycosylationamino acid metabolic processmodified amino acid metabolic processlipid metabolic processvitamin metabolic processsulfur compound metabolic processintracellular protein transportnucleocytoplasmic transportautophagyinflammatory responsemitochondrion organizationcytoskeleton organizationmicrotubule-based movementperoxisome organizationlysosome organizationchromosome segregationcell adhesionestablishment or maintenance of cell polarityprogrammed cell deathphotosynthesismrna metabolic processsnrna metabolic processvesicle-mediated transportreproductive processdigestive system processsignalingcell differentiationprotein catabolic processextracellular matrix organizationregulatory ncrna-mediated gene silencingtelomere organizationcell junction organizationwound healingribosome biogenesiscilium organizationanatomical structure developmentcell motilitynervous system processendocrine processprotein maturationtransmembrane transportnucleobase-containing small molecule metabolic processhepaticobiliary system processmembrane organizationprotein-containing complex assemblycell wall organization or biogenesisnitrogen cycle metabolic processprotein localization to plasma membranedefense response to other organismdetoxificationmeiotic nuclear divisionmitotic nuclear divisionmitochondrial gene expressioncarbohydrate derivative metabolic processother biological processall cellular componentnuclear chromosomeextracellular regionextracellular spacecell wallnucleusnuclear envelopenucleoplasmchromosomenucleolusmitochondrionlysosomeendosomevacuoleperoxisomeendoplasmic reticulumgolgi apparatuslipid dropletmicrotubule organizing centercytosolribosomecytoskeletonplasma membraneciliumplastidthylakoidexternal encapsulating structureextracellular matrixcytoplasmic vesicleorganelleother cellular component
Cell color indicative of number of GO terms
AspectTerm
Cellular Componentextracellular region
Molecular Functionsterol binding
Biological Processintracellular cholesterol transport

Names & Taxonomy

Protein names

  • Recommended name
    NPC intracellular cholesterol transporter 2
  • Alternative names
    • Epididymal secretory protein E1

Gene names

    • Name
      Npc2

Organism names

  • Taxonomic identifier
  • Organism
  • Strain
    • C57BL/6J
  • Taxonomic lineage
    Eukaryota > Metazoa > Chordata > Craniata > Vertebrata > Euteleostomi > Mammalia > Eutheria > Euarchontoglires > Glires > Rodentia > Myomorpha > Muroidea > Muridae > Murinae > Mus > Mus

Accessions

  • Primary accession
    Q3TXQ4

Organism-specific databases

Subcellular Location

Keywords

  • Cellular component

PTM/Processing

Features

Showing features for signal, chain.

Type
IDPosition(s)Description
Signal1-19
ChainPRO_500422980620-149NPC intracellular cholesterol transporter 2

Keywords

Proteomic databases

Interaction

Subunit

Interacts with NPC1 (via the second lumenal domain) in a cholestrol-dependent manner. Interacts with NUS1/NgBR, the interaction stabilizes NCP2 and regulates cholesterol trafficking. Interacts with DHDDS. Interacts with NEDD4L (via C2 domain). Interacts with NPC1L1.

Family & Domains

Features

Showing features for domain.

TypeIDPosition(s)Description
Domain24-145MD-2-related lipid-recognition

Sequence similarities

Belongs to the NPC2 family.

Keywords

Family and domain databases

Sequence

  • Sequence status
    Complete
  • Length
    149
  • Mass (Da)
    16,446
  • Last updated
    2005-10-11 v1
  • Checksum
    6D1896CF697D1C05
MRFLAATILLLALVAASQAEPLHFKDCGSKVGVIKEVNVSPCPTDPCQLHKGQSYSVNITFTSGTQSQNSTALVHGILEGIRVPFPITEPDGCKSGINCPIQKDKVYSYLNKLPVKNEYPSIKLVVEWKLEDDKKNNLFCWEIPVQITS

Sequence databases

Nucleotide SequenceProtein SequenceMolecule TypeStatus
AK159154
EMBL· GenBank· DDBJ
BAE34861.1
EMBL· GenBank· DDBJ
mRNA

Similar Proteins

Disclaimer

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