Defective SLC24A5 does not exchange cytosolic 4Na+ for Golgi luminal Ca2+, K+

Stable Identifier
R-HSA-5626356
Type
Reaction [transition]
Species
Homo sapiens
Compartment
Golgi lumen, cytosol, trans-Golgi network membrane
ReviewStatus
5/5
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Defective SLC24A5 does not exchange cytosolic 4Na+ for Golgi luminal Ca2+, K+
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Five members of the NCKX (SLC24) family are all able to exchange one Ca2+ and one K+ for four Na+. SLC24A5 (NCKX5, located on the trans-Golgi membrane) is the prediminant K+-dependent Na+/Ca2+ exchanger in melanocytes and is one of a handful of genes thought to play a role in determining human skin colour. Defects in SLC24A5 can cause oculocutaneous albinism 6 (OCA6; MIM:113750), a disorder characterised by a reduction or complete loss of melanin in the skin, hair and eyes. Patients with this condition show accompanying eye symptoms. Mutations causing OCA6 are W591* and L454Ffs*33 (Mondal et al. 2012, Wei et al. 2013).
Literature References
PubMed ID Title Journal Year
23364476 Exome sequencing identifies SLC24A5 as a candidate gene for nonsyndromic oculocutaneous albinism

Yang, L, Liu, XZ, Zang, DJ, He, X, Li, W, Wang, Y, Wei, AH, Zhang, Z, Zhou, ZY, Dai, LL, Zhang, MR, Yang, XM

J. Invest. Dermatol. 2013
23010199 Molecular basis of albinism in India: evaluation of seven potential candidate genes and some new findings

Mondal, M, Ray, K, Sengupta, M, Sil, A, Samanta, S

Gene 2012
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Catalyst Activity

calcium, potassium:sodium antiporter activity of SLC24A5 mutants [trans-Golgi network membrane]

Physical Entity
SLC24A5 mutants [trans-Golgi network membrane] (Homo sapiens)
Activity
calcium, potassium:sodium antiporter activity (GO:0008273)
Normal reaction
SLC24A5 exchanges cytosolic 4Na+ for Golgi luminal Ca2+, K+ (Homo sapiens)
Functional status

Loss of function of SLC24A5 mutants [trans-Golgi network membrane]

Normal Entity
Disease Entity
Status
Disease
Authored
Jassal, B  (2014-10-09)
Reviewed
Broer, S  (2015-08-04)
Created
Jassal, B  (2014-10-09)
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