GJB4

Gap junction protein, beta 4, 30.3kDa

Identifiers

GJB4 ; CX30.3; EKV

External IDs

OMIM: 605425 MGI: 95722 HomoloGene: 7339 IUPHAR: 719 GeneCards: GJB4 Gene

Gene ontology
Molecular function	• gap junction channel activity
Cellular component	• connexon complex • integral component of membrane
Biological process	• cell communication • sensory perception of smell • olfactory behavior
Sources: Amigo / QuickGO

RNA expression pattern

More reference expression data

Orthologs

Species

Human

Mouse

RefSeq (mRNA)

RefSeq (protein)

Location (UCSC)

Chr 1:
34.76 – 34.76 Mb

Chr 4:
127.35 – 127.35 Mb

PubMed search

Gap junction beta-4 protein (GJB4), also known as connexin 30.3 (Cx30.3) — is a protein that in humans is encoded by the GJB4 gene.^[1]

References

↑ "Entrez Gene: GJB4 gap junction protein, beta 4".

Andrew L Harris and Darren Locke (2009). Connexins, A Guide. New York: Springer. p. 574. ISBN 978-1-934115-46-6.
Gregory SG, Barlow KF, McLay KE; et al. (2006). "The DNA sequence and biological annotation of human chromosome 1.". Nature 441 (7091): 315–21. doi:10.1038/nature04727. PMID 16710414.
Common JE, O'Toole EA, Leigh IM; et al. (2006). "Clinical and genetic heterogeneity of erythrokeratoderma variabilis.". J. Invest. Dermatol. 125 (5): 920–7. doi:10.1111/j.0022-202X.2005.23919.x. PMID 16297190.
Gerhard DS, Wagner L, Feingold EA; et al. (2004). "The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC).". Genome Res. 14 (10B): 2121–7. doi:10.1101/gr.2596504. PMC 528928. PMID 15489334.
Ota T, Suzuki Y, Nishikawa T; et al. (2004). "Complete sequencing and characterization of 21,243 full-length human cDNAs.". Nat. Genet. 36 (1): 40–5. doi:10.1038/ng1285. PMID 14702039.
Plantard L, Huber M, Macari F; et al. (2004). "Molecular interaction of connexin 30.3 and connexin 31 suggests a dominant-negative mechanism associated with erythrokeratodermia variabilis.". Hum. Mol. Genet. 12 (24): 3287–94. doi:10.1093/hmg/ddg364. PMID 14583444.
Richard G, Brown N, Rouan F; et al. (2003). "Genetic heterogeneity in erythrokeratodermia variabilis: novel mutations in the connexin gene GJB4 (Cx30.3) and genotype-phenotype correlations.". J. Invest. Dermatol. 120 (4): 601–9. doi:10.1046/j.1523-1747.2003.12080.x. PMID 12648223.
Strausberg RL, Feingold EA, Grouse LH; et al. (2003). "Generation and initial analysis of more than 15,000 full-length human and mouse cDNA sequences.". Proc. Natl. Acad. Sci. U.S.A. 99 (26): 16899–903. doi:10.1073/pnas.242603899. PMC 139241. PMID 12477932.
López-Bigas N, Melchionda S, Gasparini P; et al. (2002). "A common frameshift mutation and other variants in GJB4 (connexin 30.3): Analysis of hearing impairment families.". Hum. Mutat. 19 (4): 458. doi:10.1002/humu.9023. PMID 11933201.
Manthey D, Banach K, Desplantez T; et al. (2001). "Intracellular domains of mouse connexin26 and -30 affect diffusional and electrical properties of gap junction channels.". J. Membr. Biol. 181 (2): 137–48. doi:10.1007/s00232-001-0017-1. PMID 11420600.
Macari F, Landau M, Cousin P; et al. (2000). "Mutation in the gene for connexin 30.3 in a family with erythrokeratodermia variabilis.". Am. J. Hum. Genet. 67 (5): 1296–301. doi:10.1016/S0002-9297(07)62957-7. PMC 1288569. PMID 11017804.
Hennemann H, Dahl E, White JB; et al. (1992). "Two gap junction genes, connexin 31.1 and 30.3, are closely linked on mouse chromosome 4 and preferentially expressed in skin.". J. Biol. Chem. 267 (24): 17225–33. PMID 1512260.
Hacham-Zadeh S, Even-Paz Z (1978). "Erythrokeratodermia variabilis in a Jewish Kurdish family.". Clin. Genet. 13 (5): 404–8. doi:10.1111/j.1399-0004.1978.tb04138.x. PMID 148984.

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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GJB4

References

Further reading