APOB

Aliases
  • APOB
  • Apo B-100
  • Apo B-48
  • ApoB-100
  • ApoB-48
  • Apolipoprotein B
  • Apolipoprotein B-100
  • Apolipoprotein B-48
  • Apolipoprotein B48
  • Apolipoproteins (Apo) B
  • FCHL2
  • FLDB
  • LDLCQ4
  • apolipoprotein B (including Ag(x) antigen)
Description
APOB, a secreted glycoprotein, is the main apolipoprotein of chylomicrons (apo B-48), LDL (apo B-100) and VLDL (apo B-100). It occurs in plasma as two main isoforms, apoB-48 and apoB-100: the former is synthesized exclusively in the gut and the latter in the liver. Apo B-100 functions as a recognition signal for the cellular binding and internalization of LDL particles by the apoB/E receptor. The intestinal and the hepatic forms of apoB are encoded by a single gene from a single, very long mRNA. The two isoforms share a common N-terminal sequence. The shorter apoB-48 protein is produced after RNA editing of the apoB-100 transcript at residue 2180 (CAA->UAA), resulting in the creation of a stop codon, and early translation termination. Mutations in this gene or its regulatory region cause hypobetalipoproteinemia, normotriglyceridemic hypobetalipoproteinemia, and hypercholesterolemia due to ligand-defective apoB, diseases affecting plasma cholesterol and apoB levels. APOB is up-regulated in response to enterovirus 71 (EV71) infection.
Attributes
QA State
Under Review
Type
Protein
HGNC Name
APOB
Certifications
  • None
QA State for Breast
Under Review

 Non-Public Biomarker

Organ-specific information for this biomarker is currently being annotated or is "under review". Logging in may give you privileges to view additional information. Contact the Informatics Center if you believe you should have access.

Certifications
  • None
QA State for Ovary
Under Review

 Non-Public Biomarker

Organ-specific information for this biomarker is currently being annotated or is "under review". Logging in may give you privileges to view additional information. Contact the Informatics Center if you believe you should have access.

 Non-Public Biomarker

Organ-specific information for this biomarker is currently being annotated or is "under review". Logging in may give you privileges to view additional information. Contact the Informatics Center if you believe you should have access.

 Non-Public Biomarker

Organ-specific information for this biomarker is currently being annotated or is "under review". Logging in may give you privileges to view additional information. Contact the Informatics Center if you believe you should have access.

 Non-Public Biomarker

Organ-specific information for this biomarker is currently being annotated or is "under review". Logging in may give you privileges to view additional information. Contact the Informatics Center if you believe you should have access.

 Non-Public Biomarker

Organ-specific information for this biomarker is currently being annotated or is "under review". Logging in may give you privileges to view additional information. Contact the Informatics Center if you believe you should have access.