TY - JOUR
T1 - A family of human β3-galactosyltransferases
T2 - Characterization of four members of a UDP-galactose:β-N-acetyl-glucosamine/β-N-acetyl-galactosamine β-1,3-galactosyltransferase family
AU - Amado, Margarida
AU - Almeida, Raquel
AU - Carneiro, Fatima
AU - Levery, Steven B.
AU - Holmes, Eric H.
AU - Nomoto, Mitsuharu
AU - Hollingsworth, Michael A.
AU - Hassan, Helle
AU - Schwientek, Tilo
AU - Nielsen, Peter A.
AU - Bennett, Eric P.
AU - Clausen, Henrik
PY - 1998/5/22
Y1 - 1998/5/22
N2 - BLAST analysis of expressed sequence tags (ESTs) using the coding sequence of a human UDP-galactose:β-N-acetyl-glucosamine β-1,3- galactosyltransferase, designated β3Gal-T1, revealed no ESTs with identical sequences but a large number with similarity. Three different sets of overlapping ESTs with sequence similarities to β3Gal-T1 were compiled, and complete coding regions of these genes were obtained. Expression of two of these genes in the Baculo virus system showed that one represented a UDP- galactose:β-N-acetyl-glucosemine β-1,3-galactosyltransferase (β3Gal-T2) with similar kinetic properties as β3Gal-T1. Another gene represented a UDP- galactose:β-N-acetyl-galactosamine β-1,3-galactosyltransferase (β3Gal-T4) involved in G(M1)/G(D1) ganglioside synthesis, and this gene was highly similar to a recently reported rat G(D1) synthase (Miyazaki, H., Fukumoto, S., Okada, M., Hasegawa, T., and Furukawa, K. (1997) J. Biol. Chem. 272, 24794-24799). Northern analysis of mRNA from human organs with the four homologous cDNA revealed different expression patterns. β3Gal-T1 mRNA was expressed in brain, β3Gal-T2 was expressed in brain and heart, and β3Gal- T3 and -T4 were more widely expressed. The coding regions for each of the four genes were contained in single exons. β3Gal-T2, -T3, and -T4 were localized to 1q31, 3q25, and 6p21.3, respectively, by EST mapping. The results demonstrate the existence of a family of homologous β3- galactosyltransferase genes.
AB - BLAST analysis of expressed sequence tags (ESTs) using the coding sequence of a human UDP-galactose:β-N-acetyl-glucosamine β-1,3- galactosyltransferase, designated β3Gal-T1, revealed no ESTs with identical sequences but a large number with similarity. Three different sets of overlapping ESTs with sequence similarities to β3Gal-T1 were compiled, and complete coding regions of these genes were obtained. Expression of two of these genes in the Baculo virus system showed that one represented a UDP- galactose:β-N-acetyl-glucosemine β-1,3-galactosyltransferase (β3Gal-T2) with similar kinetic properties as β3Gal-T1. Another gene represented a UDP- galactose:β-N-acetyl-galactosamine β-1,3-galactosyltransferase (β3Gal-T4) involved in G(M1)/G(D1) ganglioside synthesis, and this gene was highly similar to a recently reported rat G(D1) synthase (Miyazaki, H., Fukumoto, S., Okada, M., Hasegawa, T., and Furukawa, K. (1997) J. Biol. Chem. 272, 24794-24799). Northern analysis of mRNA from human organs with the four homologous cDNA revealed different expression patterns. β3Gal-T1 mRNA was expressed in brain, β3Gal-T2 was expressed in brain and heart, and β3Gal- T3 and -T4 were more widely expressed. The coding regions for each of the four genes were contained in single exons. β3Gal-T2, -T3, and -T4 were localized to 1q31, 3q25, and 6p21.3, respectively, by EST mapping. The results demonstrate the existence of a family of homologous β3- galactosyltransferase genes.
UR - http://www.scopus.com/inward/record.url?scp=0038920413&partnerID=8YFLogxK
U2 - 10.1074/jbc.273.21.12770
DO - 10.1074/jbc.273.21.12770
M3 - Journal article
C2 - 9582303
AN - SCOPUS:0038920413
SN - 0021-9258
VL - 273
SP - 12770
EP - 12778
JO - Journal of Biological Chemistry
JF - Journal of Biological Chemistry
IS - 21
ER -