GJD3

Gap junction protein, delta 3, 31.9kDa

Identifiers

GJD3 ; CX31.9; Cx30.2; GJA11; GJC1

External IDs

OMIM: 607425 MGI: 2384150 HomoloGene: 17530 IUPHAR: 722 GeneCards: GJD3 Gene

Gene ontology
Molecular function	• ion channel activity • gap junction channel activity • protein binding
Cellular component	• integral component of plasma membrane • connexon complex • cell surface
Biological process	• cell communication • response to glucose • gap junction assembly • ion transmembrane transport
Sources: Amigo / QuickGO

Orthologs

Species

Human

Mouse

RefSeq (mRNA)

RefSeq (protein)

Location (UCSC)

Chr 17:
40.36 – 40.36 Mb

Chr 11:
98.98 – 98.98 Mb

PubMed search

Gap junction delta-2 (GJD2), also known as connexin-36 (Cx36) or gap junction alpha-9 (GJA9), is a protein that in humans is encoded by the GJD2 gene.^[1]

Function

This gene is a member of the large family of connexins that are required for the formation of gap junctions. Six connexin monomers form a hemichannel, or connexon, on the cell surface. This connexon can interact with a connexon from a neighboring cell, thus forming a channel linking the cytoplasm of the 2 cells.^[1]

References

1 2 "Entrez Gene: gap junction protein".

White TW, Srinivas M, Ripps H; et al. (2002). "Virtual cloning, functional expression, and gating analysis of human connexin31.9.". Am. J. Physiol., Cell Physiol. 283 (3): C960–70. doi:10.1152/ajpcell.00163.2002. PMID 12176752.
Gemel J, Lin X, Collins R; et al. (2008). "Cx30.2 can form heteromeric gap junction channels with other cardiac connexins.". Biochem. Biophys. Res. Commun. 369 (2): 388–94. doi:10.1016/j.bbrc.2008.02.040. PMC 2323682. PMID 18291099.
Belluardo N, White TW, Srinivas M; et al. (2001). "Identification and functional expression of HCx31.9, a novel gap junction gene.". Cell Commun. Adhes. 8 (4-6): 173–8. doi:10.3109/15419060109080719. PMID 12064584.
Bukauskas FF, Kreuzberg MM, Rackauskas M; et al. (2006). "Properties of mouse connexin 30.2 and human connexin 31.9 hemichannels: implications for atrioventricular conduction in the heart.". Proc. Natl. Acad. Sci. U.S.A. 103 (25): 9726–31. doi:10.1073/pnas.0603372103. PMC 1480474. PMID 16772377.
Söhl G, Nielsen PA, Eiberger J, Willecke K (2003). "Expression profiles of the novel human connexin genes hCx30.2, hCx40.1, and hCx62 differ from their putative mouse orthologues.". Cell Commun. Adhes. 10 (1): 27–36. doi:10.1080/15419060302063. PMID 12881038.
Kreuzberg MM, Liebermann M, Segschneider S; et al. (2009). "Human connexin31.9, unlike its orthologous protein connexin30.2 in the mouse, is not detectable in the human cardiac conduction system.". J. Mol. Cell. Cardiol. 46 (4): 553–9. doi:10.1016/j.yjmcc.2008.12.007. PMID 19168070.
Unsworth HC, Aasen T, McElwaine S, Kelsell DP (2007). "Tissue-specific effects of wild-type and mutant connexin 31: a role in neurite outgrowth.". Hum. Mol. Genet. 16 (2): 165–72. doi:10.1093/hmg/ddl452. PMID 17142249.
Nielsen PA, Beahm DL, Giepmans BN; et al. (2002). "Molecular cloning, functional expression, and tissue distribution of a novel human gap junction-forming protein, connexin-31.9. Interaction with zona occludens protein-1.". J. Biol. Chem. 277 (41): 38272–83. doi:10.1074/jbc.M205348200. PMID 12154091.

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

Membrane transport protein: ion channels (TC 1A)

Ca²⁺: Calcium channel

Ligand-gated	Inositol trisphosphate receptor 1 2 3 Ryanodine receptor 1 2 3

Voltage-gated	L-type/Ca_vα 1.1 1.2 1.3 1.4 N-type/Ca_vα2.2 P-type/Ca_vα 2.1 Q-type/Ca_vα2.1 R-type/Ca_vα2.3 T-type/Ca_vα 3.1 3.2 3.3 α₂δ-subunits 1 2 β-subunits β1 β2 β3 β4 γ-subunits γ1 γ2 γ3 γ4 Cation channels of sperm 1 2 3 4 Two-pore channel 1 2

Na⁺: Sodium channel

Constitutively active	Epithelial sodium channel α β γ δ

Proton-gated	Amiloride-sensitive cation channel 1 2 3 4

Voltage-gated	Na_vα 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 7A Na_vβ 1 2 3 4

K⁺: Potassium channel

Calcium-activated	BK channel α1 β1 β2 β3 β4 SK channel SK1 SK2 SK3 IK channel IK1 K_Ca 1.1 2.1 2.2 2.3 3.1 4.1 4.2 5.1

Inward-rectifier	K_ATP K_ir 1.1 2.1 2.2 2.3 2.4 2.6 GIRK/K_ir 3.1 3.2 3.3 3.4 K_ir 4.1 4.2 5.1 6.1 6.2 7.1

Tandem pore domain	K2P 1 2 3 4 5 6 7 9 10 12 13 15 16 17 18

Voltage-gated	K_vα1-6 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 2.1 2.2 3.1 3.2 3.3 3.4 4.1 4.2 4.3 5.1 6.1 6.2 6.3 6.4 K_vα7-12 7.1 7.2 7.3 7.4 7.5 8.1 8.2 9.1 9.2 9.3 10.1 10.2 11.1/hERG 11.2 11.3 12.1 12.2 12.3 K_vβ 1 2 3 KCNIP 1 2 3 4 minK/ISK minK/ISK-like MiRP 1 2 3 Shaker gene

Miscellaneous

Cl⁻: Chloride channel	Calcium-activated chloride channels Anoctamin ANO1 Bestrophin 1 2 Chloride Channel Accessory 1 2 3 4 CFTR CLCN 1 2 3 4 5 6 7 KA KB CLIC 1 2 3 4 5 6 L1 CLNS 1A 1B

H⁺: Proton channel	HVCN1

M⁺: CNG cation channel	α 1 2 3 4 β 1 2 3 HCN FC 1 2 3 4

M⁺: TRP cation channel	TRPA (1) TRPC 1 2 3 4 4AP 5 6 7 TRPM 1 2 3 4 5 6 7 8 TRPML 1 2 3 TRPN TRPP 1 2 TRPV 1 2 3 4 5 6

H₂O (+ solutes): Porin	Aquaporin 0 1 2 3 4 5 6 7 8 9 Voltage-dependent anion channel 1 2 3 General bacterial porin family

Cytoplasm: Gap junction	Connexin: A GJA1 GJA3 GJA4 GJA5 GJA8 GJA9 GJA10 B GJB1 GJB2 GJB3 GJB4 GJB5 GJB6 GJB7 C GJC1 GJC2 GJC3 D GJD2 GJD3 GJD4) Innexin

By gating mechanism

Ion channel class	Ligand-gated Light-gated Voltage-gated Stretch-activated

see also disorders

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GJD3

Function

References

Further reading