PMID- 9266697 OWN - NLM STAT- MEDLINE DCOM- 19970908 LR - 20190620 IS - 0014-2956 (Print) IS - 0014-2956 (Linking) VI - 247 IP - 2 DP - 1997 Jul 15 TI - Cloning and expression of cDNA for a human Gal(beta1-3)GalNAc alpha2,3-sialyltransferase from the CEM T-cell line. PG - 558-66 AB - Complementary DNA encoding a human Gal(beta1-3)GalNAc alpha2,3-sialyltransferase type II (hST3Gal II) was cloned from a CEM T-cell cDNA library using a 23-base oligonucleotide probe. The sequence of this probe was established on the basis of a slightly divergent sialylmotif L that was obtained by polymerase chain reaction with degenerate oligonucleotide primers based on the conserved sialylmotif L of mammalian Gal(beta1-3)GalNAc alpha2,3-sialyltransferases. It was thus confirmed that a short oligonucleotide probe may be sensitive and highly specific. The nucleotide and amino acid sequences of hST3Gal II show, respectively, 56.3% and 49.3% similarity to hST3Gal I [Kitagawa, H. & Paulson, J. C. (1994) J. Biol. Chem. 269, 17872-17878] and 88.1% and 93.7% similarity to murine ST3Gal II [Lee, Y. C., Kojima, N., Wada, E., Kurosawa, N., Nakaoka, T., Hamamoto, T. & Tsuji, S. (1994) J. Biol. Chem. 269, 10028-10033]. hST3Gal II mRNA was highly expressed in heart, liver, skeletal muscle and various lymphoid tissues but not in brain and kidney. A soluble form of hST3Gal II expressed in COS-7 cells was tested in vitro for substrate specificity and kinetic properties. Asialofetuin and asialo-bovine submaxillary mucin appeared better substrates for hST3Gal II than for its murine counterpart as previously reported [Kojima, N., Lee, Y.-C., Hamamoto, T., Kurosawa, N. & Tsuji, S. (1994) Biochemistry 33, 5772-5776]. In previous studies, we have shown hyposialylation of O-glycans attached to two major lymphocyte CD43 and CD45 cell surface molecules in human-immunodeficiency-virus-1(HIV-1)-infected T-cell lines. Since comparable levels of hST3Gal I and hST3Gal II mRNA and enzymatic activity were observed in parental and HIV-1-infected CEM T-cell lysates, the sialylation defect associated with HIV infection of this cell line is probably due to a mechanism different from a simple altered catalytic activity of these sialyltransferases. FAU - Giordanengo, V AU - Giordanengo V AD - Laboratoire de Virologie, Faculte de Medecine, Nice, France. FAU - Bannwarth, S AU - Bannwarth S FAU - Laffont, C AU - Laffont C FAU - Van Miegem, V AU - Van Miegem V FAU - Harduin-Lepers, A AU - Harduin-Lepers A FAU - Delannoy, P AU - Delannoy P FAU - Lefebvre, J C AU - Lefebvre JC LA - eng SI - GENBANK/X96667 PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - Eur J Biochem JT - European journal of biochemistry JID - 0107600 RN - 0 (DNA Primers) RN - 0 (DNA, Complementary) RN - 0 (RNA, Messenger) RN - 0 (Recombinant Proteins) RN - EC 2.4.99.- (Sialyltransferases) RN - EC 2.4.99.6 (N-acetyllactosaminide alpha-2,3-sialyltransferase) SB - IM MH - Amino Acid Sequence MH - Animals MH - Base Sequence MH - COS Cells MH - Cell Line MH - DNA Primers MH - DNA, Complementary MH - Humans MH - Kinetics MH - Molecular Sequence Data MH - Organ Specificity MH - Polymerase Chain Reaction MH - RNA, Messenger/biosynthesis MH - Recombinant Proteins/biosynthesis/chemistry/metabolism MH - Sialyltransferases/biosynthesis/chemistry/*metabolism MH - T-Lymphocytes MH - Transfection EDAT- 1997/07/15 00:00 MHDA- 1997/07/15 00:01 CRDT- 1997/07/15 00:00 PHST- 1997/07/15 00:00 [pubmed] PHST- 1997/07/15 00:01 [medline] PHST- 1997/07/15 00:00 [entrez] AID - 10.1111/j.1432-1033.1997.00558.x [doi] PST - ppublish SO - Eur J Biochem. 1997 Jul 15;247(2):558-66. doi: 10.1111/j.1432-1033.1997.00558.x.