Recombinant Human CMP-N-acetylneuraminate-beta-galactosamide-alpha-2,3-sialyltransferase 4 (ST3GAL4), Truncated

Uniprot Id

Q11206

Target Species

Human

Target Name

ST3GAL4

Target Full Name

CMP-N-acetylneuraminate-beta-galactosamide-alpha-2,3-sialyltransferase 4

Target Function

A beta-galactoside alpha2-3 sialyltransferase involved in terminal sialylation of glycoproteins and glycolipids. Catalyzes the transfer of sialic acid (N-acetyl-neuraminic acid; Neu5Ac) from the nucleotide sugar donor CMP-Neu5Ac onto acceptor Galbeta-(1->3)-GalNAc- and Galbeta-(1->4)-GlcNAc-terminated glycoconjugates through an alpha2-3 linkage. Plays a major role in hemostasis. Responsible for sialylation of plasma VWF/von Willebrand factor, preventing its recognition by asialoglycoprotein receptors (ASGPR) and subsequent clearance. Regulates ASGPR-mediated clearance of platelets. Participates in the biosynthesis of the sialyl Lewis X epitopes, both on O- and N-glycans, which are recognized by SELE/E-selectin, SELP/P-selectin and SELL/L-selectin. Essential for selectin-mediated rolling and adhesion of leukocytes during extravasation. Contributes to adhesion and transendothelial migration of neutrophils likely through terminal sialylation of CXCR2. In glycosphingolipid biosynthesis, sialylates GM1 and GA1 gangliosides to form GD1a and GM1b, respectively. Metabolizes brain c-series ganglioside GT1c forming GQ1c. Synthesizes ganglioside LM1 (IV3Neu5Ac-nLc4Cer), a major structural component of peripheral nerve myelin.

Target Subcellular Location

Golgi apparatus, Golgi stack membrane; Single-pass type II membrane protein. Secreted. Note=Membrane-bound form in trans cisternae of Golgi. Secreted into the body fluid.

Target Protein Families

Glycosyltransferase 29 family

Target Tissue Specificity

Highly expressed in adult placenta, heart and kidney.

Target Synonyms

ST3GAL4; CGS23; NANTA3; SIAT4C; STZ; CMP-N-acetylneuraminate-beta-galactosamide-alpha-2,3-sialyltransferase 4; Alpha 2,3-ST 4; Beta-galactoside alpha-2,3-sialyltransferase 4; EC 2.4.99.2; EC 2.4.99.4; Alpha 2,3-sialyltransferase IV; Gal-NAc6S; Gal-beta-1,4-GalNAc-alpha-2,3-sialyltransferase; SAT-3; ST-4; ST3Gal IV; ST3GalIV; ST3GalA.2; STZ; Sialyltransferase 4C; SIAT4-C

Target Background

This gene encodes a member of the glycosyltransferase 29 family, a group of enzymes involved in protein glycosylation. The encoded protein is targeted to Golgi membranes but may be proteolytically processed and secreted. The gene product may also be involved in the increased expression of sialyl Lewis X antigen seen in inflammatory responses. Multiple transcript variants encoding different isoforms have been found for this gene.