APOA4 Gene Summary [Human]

Apoliprotein (apo) A-IV gene contains 3 exons separated by two introns. A sequence polymorphism has been identified in the 3'UTR of the third exon. The primary translation product is a 396-residue preprotein which after proteolytic processing is secreted its primary site of synthesis, the intestine, in association with chylomicron particles. Although its precise function is not known, apo A-IV is a potent activator of lecithin-cholesterol acyltransferase in vitro. [provided by RefSeq, Jul 2008]

Details

Type
Protein Coding
Official Symbol
APOA4
Official Name
apolipoprotein A4 [Source:HGNC Symbol;Acc:HGNC:602]
Ensembl ID
ENSG00000110244
Bio databases IDs NCBI: 337 Ensembl: ENSG00000110244
Aliases apolipoprotein A4
Synonyms APOA-IV, apolipoprotein A4, APOLIPOPROTEIN A-IV
Species
Human, Homo sapiens
OrthologiesMouseRat

Protein Domains

A protein domain is a distinct structural or functional region within a protein that can evolve, function, and exist independently of the rest of the protein chain. These domains in human APOA4 often fold into stable, three-dimensional structures and are associated with specific biological functions, such as binding to DNA, other proteins, or small molecules.
  • lipid transporter
  • copper ion binding
  • phospholipid binding
  • binding protein
  • lipid binding
  • protein homodimerization
  • antioxidant enzyme
  • protein binding
  • enzyme activator activity
  • identical protein binding
  • Apolipoprotein A1/A4/E domain
  • transporter

Pathways

Biological processes and signaling networks where the APOA4 gene in human plays a role, providing insight into its function and relevance in health or disease.

Top Findings

The most significant associations for this gene, including commonly observed domains, pathway involvement, and functional highlights based on current data.
disease
  • weight gain
  • schizophrenia
  • diabetes mellitus
  • Huntington disease
  • Alzheimer disease
  • aortic valve calcification
  • autosomal dominant tubulointerstitial kidney disease
  • complete testicular feminization syndrome
  • colitis
  • systemic sclerosis
regulated by
regulates
role in cell
  • expression in
  • adhesion
  • cell-cell adhesion
  • number
  • efflux in
  • transactivation in
  • association in

Subcellular Expression

Locations within the cell where the protein is known or predicted to be active, providing insight into its function and cellular context.
  • Extracellular Space
  • Golgi-enriched fraction
  • Cytoplasm
  • cell surface
  • cellular membrane
  • cytosol
  • endoplasmic reticulum lumen
  • synapse
  • early endosomes
  • plasma

Gene Ontology Annotations

Describes the biological processes, cellular components, and molecular functions associated with the human APOA4 gene, providing context for its role in the cell.

Biological Process

Functions and activities the gene product is involved in
  • very-low-density lipoprotein particle remodeling
  • chylomicron remodeling
  • high-density lipoprotein particle remodeling
  • regulation of cholesterol transport
  • cholesterol metabolic process
  • response to lipid hydroperoxide
  • lipoprotein metabolic process
  • acylglycerol homeostasis
  • cholesterol homeostasis
  • leukocyte cell-cell adhesion
  • positive regulation of fatty acid biosynthetic process
  • reverse cholesterol transport
  • negative regulation of plasma lipoprotein particle oxidation
  • positive regulation of triglyceride catabolic process
  • regulation of intestinal cholesterol absorption
  • positive regulation of lipoprotein lipase activity
  • response to stilbenoid
  • protein-lipid complex assembly
  • peripheral nervous system axon regeneration
  • lipid homeostasis
  • hydrogen peroxide catabolic process
  • lipid transport
  • innate immune response in mucosa
  • phosphatidylcholine metabolic process
  • removal of superoxide radicals
  • lipid catabolic process
  • cholesterol efflux
  • chylomicron assembly
  • response to triglyceride
  • phospholipid efflux

Cellular Component

Where in the cell the gene product is active
  • very-low-density lipoprotein particle
  • chylomicron
  • high-density lipoprotein particle
  • low-density lipoprotein particle
  • synapse
  • extracellular region
  • cell surface
  • endoplasmic reticulum lumen
  • early endosome
  • extracellular space
  • extracellular vesicular exosome
  • blood microparticle
  • cytosol

Molecular Function

What the gene product does at the molecular level
  • identical protein binding
  • protein binding
  • protein homodimerization activity
  • copper ion binding
  • antioxidant activity
  • lipid transporter activity
  • phosphatidylcholine-sterol O-acyltransferase activator activity
  • lipid binding
  • phosphatidylcholine binding
  • phospholipid binding

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