Full name: ST6 N-acetylgalactosaminide alpha-2,6-sialyltransferase 4

Gene type: protein coding

RefSeq status: REVIEWED

Also known as: IV; SIAT3-C; SIAT3C; SIAT7-D; SIAT7D; ST6GALNACIV; ST6GalNAc

Summary: The protein encoded by this gene is a type II membrane protein that catalyzes the transfer of sialic acid from CMP-sialic acid to galactose-containing substrates. The encoded protein prefers glycoproteins rather than glycolipids as substrates and shows restricted substrate specificity, utilizing only the trisaccharide sequence Neu5Ac-alpha-2,3-Gal-beta-1,3-GalNAc. In addition, it is involved in the synthesis of ganglioside GD1A from GM1B. The encoded protein is normally found in the Golgi apparatus but can be proteolytically processed to a soluble form. This protein is a member of glycosyltransferase family 29. Transcript variants encoding different isoforms have been found for this gene. Readthrough transcripts exist for this gene and the downstream ST6GALNAC6 gene. [provided by RefSeq, Jan 2022]

Expression: Ubiquitous expression in bone marrow (RPKM 14.6), spleen (RPKM 9.7) and 24 other tissues

Gene size: 9156bp

Exon count: 6