Oligosaccharide preferences of β1, 4-galactosyltransferase-I: Crystal structures of Met340His mutant of human β1, 4-galactosyltransferase-I with a pentasaccharide …

V Ramasamy, B Ramakrishnan, E Boeggeman… - Journal of molecular …, 2005 - Elsevier
β-1, 4-Galactosyltransferase-I (β4Gal-T1) transfers galactose from UDP-galactose to N-
acetylglucosamine (GlcNAc) residues of the branched N-linked oligosaccharide chains of …

Binding of N-acetylglucosamine (GlcNAc) β1–6-branched oligosaccharide acceptors to β4-galactosyltransferase I reveals a new ligand binding mode

B Ramakrishnan, E Boeggeman, PK Qasba - Journal of Biological …, 2012 - ASBMB
N-Acetyllactosamine is the most prevalent disaccharide moiety in the glycans on the surface
of mammalian cells and often found as repeat units in the linear and branched …

Structure-based design of β1, 4-galactosyltransferase I (β4Gal-T1) with equally efficient N-acetylgalactosaminyltransferase activity: point mutation broadens β4Gal-T1 …

B Ramakrishnan, PK Qasba - Journal of Biological Chemistry, 2002 - ASBMB
β1, 4-Galactosyltransferase I (Gal-T1) normally transfers Gal from UDP-Gal to GlcNAc in the
presence of Mn 2+ ion. In the presence of α-lactalbumin (LA), the Gal acceptor specificity is …

Knockout of mouse β1, 4-galactosyltransferase-1 gene results in a dramatic shift of outer chain moieties of N-glycans from type 2 to type 1 chains in hepatic membrane …

N KOTANI, M ASANO, Y IWAKURA… - Biochemical …, 2001 - portlandpress.com
To understand the contribution of β1, 4-galactosyltransferase (β4Gal-T)-1 to galactosylation
in vivo, N-glycans of hepatic membrane glycoproteins and plasma glycoproteins from β4Gal …

Structure-based evolutionary relationship of glycosyltransferases: a case study of vertebrate β1, 4-galactosyltransferase, invertebrate β1, 4-N …

B Ramakrishnan, PK Qasba - Current opinion in structural biology, 2010 - Elsevier
Cell surface glycans play important cellular functions and are synthesized by
glycosyltransferases. Structure and function studies show that the donor sugar specificity of …

Mutation of Arginine 228 to Lysine Enhances the Glucosyltransferase Activity of Bovine β-1,4-Galactosyltransferase I,,

B Ramakrishnan, E Boeggeman, PK Qasba - Biochemistry, 2005 - ACS Publications
β-1, 4-Galactosyltransferase I (β4Gal-T1) normally transfers Gal from UDP-Gal to GlcNAc in
the presence of Mn2+ ion (Gal-T activity) and also transfers Glc from UDP-Glc to GlcNAc (Glc …

Fold recognition study of α3-galactosyltransferase and molecular modeling of the nucleotide sugar-binding domain

A Imberty, C Monier, E Bettler, S Morera… - …, 1999 - academic.oup.com
The structure and fold of the enzyme responsible for the biosynthesis of the
xenotransplantation antigen, namely pig α3 galactosyltransferase, has been studied by …

Crystal structure of β1, 4-galactosyltransferase complex with UDP-Gal reveals an oligosaccharide acceptor binding site

B Ramakrishnan, PV Balaji, PK Qasba - Journal of molecular biology, 2002 - Elsevier
The crystal structure of the catalytic domain of bovine β1, 4-galactosyltransferase (Gal-T1) co-
crystallized with UDP-Gal and MnCl2 has been solved at 2.8 Å resolution. The structure not …

Structure and function of β-1, 4-galactosyltransferase

PK Qasba, B Ramakrishnan… - Current drug …, 2008 - ingentaconnect.com
Beta-1, 4-galactosylransferase (β4Gal-T1) participates in the synthesis of Galβ1-4-GlcNAc-
disaccharide unit of glycoconjugates. It is a trans-Golgi glycosyltransferase (Glyco-T) with a …

Effect of the Met344His mutation on the conformational dynamics of bovine β-1, 4-galactosyltransferase: crystal structure of the Met344His mutant in complex with …

B Ramakrishnan, E Boeggeman, PK Qasba - Biochemistry, 2004 - ACS Publications
β-1, 4-Galactosyltransferase (β4Gal-T1) in the presence of manganese ion transfers
galactose from UDP-galactose (UDP-Gal) to N-acetylglucosamine (GlcNAc) that is either …