UDP-GlcNAc:betaGal beta-1,3-N-acetylglucosaminyltransferase 7

Definition:

N-acetyl glucosamine (GlcNAc) transferase that catalyzes the transfer of GlcNAc via a beta1->3 linkage from UDP-GlcNAc to the non-reducing terminal galactose (Gal) in the linearly growing chain of N- and O-linked keratan sulfate proteoglycans. Cooperates with B4GALT4 galactosyltransferase and CHST6 and CHST1 sulfotransferases to construct and elongate mono- and disulfated disaccharide units [->3Galbeta1->4(6-sulfoGlcNAcbeta)1->] and [->3(6-sulfoGalbeta)1->4(6-sulfoGlcNAcbeta)1->] within keratan sulfate polymer. Involved in biosynthesis of N-linked keratan sulfate proteoglycans in cornea, with an impact on proteoglycan fibril organization and corneal transparency (By similarity). May play a role in the maintenance of tissue architecture by suppressing cellular motility and invasion (By similarity).

References:

[1]. Kazuko Kitayama, et al. Enzymes responsible for synthesis of corneal keratan sulfate glycosaminoglycans. J Biol Chem. 2007 Oct 12;282(41):30085-96. [Content Brief]

[2]. Akira Seko, et al. beta1,3-N-Acetylglucosaminyltransferase-7 (beta3Gn-T7) acts efficiently on keratan sulfate-related glycans. FEBS Lett. 2004 Jan 2;556(1-3):216-20. [Content Brief]

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