Alpha-1,3-mannosyl-glycoprotein 4-beta-N-acetylglucosaminyltransferase B

Definition:

Glycosyltransferase that catalyze the transfer of GlcNAc from UDP-GlcNAc to the GlcNAcbeta1-2Manalpha1-3 arm of the core structure of N-linked glycans through a beta1-4 linkage and participates in the production of tri- and tetra-antennary N-linked sugar chains. Prefers complex-type N-glycans over hybrid-types. Has lower affinities for donors or acceptors than MGAT4A, suggesting that, under physiological conditions, it is not the main contributor in N-glycan biosynthesis.

References:

[1]. Suguru Oguri, et al. Kinetic properties and substrate specificities of two recombinant human N-acetylglucosaminyltransferase-IV isozymes. Glycoconj J. 2006 Nov;23(7-8):473-80. [Content Brief]

[2]. A Yoshida, et al. A novel second isoenzyme of the human UDP-N-acetylglucosamine:alpha1,3-D-mannoside beta1,4-N-acetylglucosaminyltransferase family: cDNA cloning, expression, and chromosomal assignment. Glycoconj J. 1998 Dec;15(12):1115-23. [Content Brief]

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