LongevityMap variant

Entry Details

Longevity Association: Significant
Population: Italian
Study Design: A sample of 143 centenarians and a control sample of 158 individuals were examined for polymorphism in APOB restriction fragment length (RFLP) (XbaI2488 and EcoRI4154) and variable number of tandem repeat (VNTR) (3'APOB-VNTR) polymorphisms
Conclusions: Neither the XbaI-RFLP nor the EcoRI-RFLP was able to discriminate between centenarians and controls, while the 3'APOB-VNTR multiallelic system revealed significant differences between the samples: the frequency of alleles with fewer than 35 repeats was lower in centenarians than in controls

HGNC symbol: APOB
Aliases: FLDB; LDLCQ4; apoB-48; apoB-100
Common name: apolipoprotein B
Description: This gene product is the main apolipoprotein of chylomicrons and low density lipoproteins. 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. 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. [provided by RefSeq, Jul 2008]
Other longevity studies of this gene: 2
OMIM: 107730
Ensembl: ENSG00000084674
UniProt/Swiss-Prot: APOB_HUMAN
Entrez Gene: 338
UniGene: 120759
HapMap: View on HapMap

De Benedictis et al. (1997)