GJA1

This page contains an overview of the genetic variation in the GJA1 gene, including its role in inherited cardiac disease. For more details, click on the links below, or for a specific variant, enter the HGVS variant here:

GJA1 gene and transcript details

Gene Name
gap junction protein, alpha 1, 43kDa

Gene Links
Ensembl: ENSG00000152661 - Locus Reference Genomic:

Genomic Location
Chromosome 6 : 121,767,994 - 121,769,142 (forward strand)
View in: Ensembl - UCSC Genome Browser


Canonical Seqs Transcript (1146 bases)Protein (382 aa)
ENST00000282561 ENSP00000282561
NM_000165.3
P17302

Summary of GJA1 in Cardiomyopathies


GJA1 variants in ExAC

Details of the protein-altering GJA1 variants (missense, loss of function truncating, inframe indels and splice site regions) found in the ExAC database are shown below. To view lists of specific variants with links to detailed population frequency data, click on the variant numbers - for all or a particular variant class.

Total VariantsCombined frequency of rare variants
All Variants950.00120
Truncating50.00007
Missense900.00113
Inframe00.00000
Splice Site00.00000

Rare variants are defined as having a mean allelic frequency of less than 0.0001.