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Gap junction protein, gamma 2, 47kDa
Symbols GJC2 ; CX46.6; Cx47; GJA12; HLD2; LMPH1C; PMLDAR; SPG44
External IDs OMIM608803 MGI2153060 HomoloGene10715 IUPHAR: 731 GeneCards: GJC2 Gene
Species Human Mouse
Entrez 57165 118454
Ensembl ENSG00000198835 ENSMUSG00000043448
UniProt Q5T442 Q8BQU6
RefSeq (mRNA) NM_020435 NM_080454
RefSeq (protein) NP_065168 NP_536702
Location (UCSC) Chr 1:
228.15 – 228.16 Mb
Chr 11:
59.18 – 59.18 Mb
PubMed search [1] [2]

Gap junction gamma-2 (GJC2), also known as connexin-46.6 (Cx46.6) and connexin-47 (Cx47) and gap junction alpha-12 (GJA12), is a protein that in humans is encoded by the GJC2 gene.[1]


This gene encodes a gap junction protein. Gap junction proteins are members of a large family of homologous connexins and comprise 4 transmembrane, 2 extracellular, and 3 cytoplasmic domains. This gene plays a key role in central myelination and is involved in peripheral myelination in humans.[1]

Clinical significance[edit]

Homozygous or compound heterozygous defects in this gene are the cause of autosomal recessive Pelizaeus-Merzbacher-like disease-1.[1]

Heterozygous missense mutations in this same gene cause pubertal onset hereditary lymphedema.


Further reading[edit]

This article incorporates text from the United States National Library of Medicine, which is in the public domain.