Lactosylceramide alpha-2,3-sialyltransferase is an enzyme that in humans is encoded by the ST3GAL5gene.[1][2]
Ganglioside GM3 is known to participate in the induction of cell differentiation, modulation of cell proliferation, maintenance of fibroblast morphology, signal transduction, and integrin-mediated cell adhesion. The protein encoded by this gene is a type II membrane protein which catalyzes the formation of GM3 using lactosylceramide as the substrate. The encoded protein is a member of glycosyltransferase family 29 and may be localized to the Golgi apparatus. Mutation in this gene has been associated with Amish infantile epilepsy syndrome. Transcript variants encoding different isoforms have been found for this gene.[2]
Mutations in this gene have also been associated to ‘Salt & Pepper’ syndrome: an autosomal recessive condition characterized by severe intellectual disability, epilepsy, scoliosis, choreoathetosis, dysmorphic facial features and altered dermal pigmentation (doi: 10.1093/hmg/ddt434)
References
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Kapitonov D, Bieberich E, Yu RK (2000). "Combinatorial PCR approach to homology-based cloning: cloning and expression of mouse and human GM3-synthase". Glycoconj. J. 16 (7): 337–50. doi:10.1023/A:1007091926413. PMID10619706.
Allende ML, Li J, Darling DS, et al. (2000). "Evidence supporting a late Golgi location for lactosylceramide to ganglioside GM3 conversion". Glycobiology. 10 (10): 1025–32. doi:10.1093/glycob/10.10.1025. PMID11030748.
Kim KW, Kim SW, Min KS, et al. (2001). "Genomic structure of human GM3 synthase gene (hST3Gal V) and identification of mRNA isoforms in the 5'-untranslated region". Gene. 273 (2): 163–71. doi:10.1016/S0378-1119(01)00595-9. PMID11595162.
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Zeng G, Gao L, Xia T, et al. (2003). "Characterization of the 5'-flanking fragment of the human GM3-synthase gene". Biochim. Biophys. Acta. 1625 (1): 30–5. doi:10.1016/s0167-4781(02)00573-0. PMID12527423.
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Chung TW, Choi HJ, Lee YC, Kim CH (2005). "Molecular mechanism for transcriptional activation of ganglioside GM3 synthase and its function in differentiation of HL-60 cells". Glycobiology. 15 (3): 233–44. doi:10.1093/glycob/cwh156. PMID15385432.
Simpson MA, Cross H, Proukakis C, et al. (2004). "Infantile-onset symptomatic epilepsy syndrome caused by a homozygous loss-of-function mutation of GM3 synthase". Nat. Genet. 36 (11): 1225–9. doi:10.1038/ng1460. PMID15502825.
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Berselli P, Zava S, Sottocornola E, et al. (2006). "Human GM3 synthase: a new mRNA variant encodes an NH2-terminal extended form of the protein". Biochim. Biophys. Acta. 1759 (7): 348–58. doi:10.1016/j.bbaexp.2006.07.001. PMID16934889.
Szabo R, Skropeta D, et al. (2017). "Advancement of Sialyltransferase Inhibitors: Therapeutic Challenges and Opportunities". Med. Res. Rev. 37: 210–270. doi:10.1002/med.21407.