Identification of an alpha2,6-sialyltransferase induced early after lymphocyte activation. 1999

M Kaufmann, and C Blaser, and S Takashima, and R Schwartz-Albiez, and S Tsuji, and H Pircher
Institute for Medical Microbiology and Hygiene, Department of Immunology, University of Freiburg, Hermann-Herder-Strasse 11, 79104 Freiburg, Germany.

We have used mRNA differential display PCR to search for genes induced in activated T cells and we identified a gene encoding an alpha2,6-sialyltransferase (ST6GalNAc IV) that is rapidly induced in lymphocytes after antigen or mitogen stimulation. The 3.6 kb full-length cDNA clone (MK45) obtained contained a single open reading frame encoding a 302 amino acid protein and a 2.5 kb 3' untranslated region. MK45 expression in in vivo-activated CD8 T cells reached the highest level 4 h after antigen triggering and then declined rapidly to nearly base levels within 45 h. Northern blot analysis further revealed that MK45 expression was also induced in LPS-activated B cells and antigen-triggered CD4 T cells in vitro. MK45 expression was low or undetectable in most other mouse tissues examined, when compared to activated lymphocytes. Importantly, the mRNA expression level of other sialyltransferases remained largely unchanged during the early stage of lymphocyte activation. Finally, increased ecto-sialyltransferase activity and an altered sialylation pattern were demonstrated on the cell surface of early activated CD8 T cells. Our report identifies a candidate sialyltransferase gene that is involved in the early alteration of the sialylation pattern of cell surface molecules in activated lymphocytes.

UI MeSH Term Description Entries
D008213 Lymphocyte Activation Morphologic alteration of small B LYMPHOCYTES or T LYMPHOCYTES in culture into large blast-like cells able to synthesize DNA and RNA and to divide mitotically. It is induced by INTERLEUKINS; MITOGENS such as PHYTOHEMAGGLUTININS, and by specific ANTIGENS. It may also occur in vivo as in GRAFT REJECTION. Blast Transformation,Blastogenesis,Lymphoblast Transformation,Lymphocyte Stimulation,Lymphocyte Transformation,Transformation, Blast,Transformation, Lymphoblast,Transformation, Lymphocyte,Activation, Lymphocyte,Stimulation, Lymphocyte
D008214 Lymphocytes White blood cells formed in the body's lymphoid tissue. The nucleus is round or ovoid with coarse, irregularly clumped chromatin while the cytoplasm is typically pale blue with azurophilic (if any) granules. Most lymphocytes can be classified as either T or B (with subpopulations of each), or NATURAL KILLER CELLS. Lymphoid Cells,Cell, Lymphoid,Cells, Lymphoid,Lymphocyte,Lymphoid Cell
D008810 Mice, Inbred C57BL One of the first INBRED MOUSE STRAINS to be sequenced. This strain is commonly used as genetic background for transgenic mouse models. Refractory to many tumors, this strain is also preferred model for studying role of genetic variations in development of diseases. Mice, C57BL,Mouse, C57BL,Mouse, Inbred C57BL,C57BL Mice,C57BL Mice, Inbred,C57BL Mouse,C57BL Mouse, Inbred,Inbred C57BL Mice,Inbred C57BL Mouse
D008969 Molecular Sequence Data Descriptions of specific amino acid, carbohydrate, or nucleotide sequences which have appeared in the published literature and/or are deposited in and maintained by databanks such as GENBANK, European Molecular Biology Laboratory (EMBL), National Biomedical Research Foundation (NBRF), or other sequence repositories. Sequence Data, Molecular,Molecular Sequencing Data,Data, Molecular Sequence,Data, Molecular Sequencing,Sequencing Data, Molecular
D004790 Enzyme Induction An increase in the rate of synthesis of an enzyme due to the presence of an inducer which acts to derepress the gene responsible for enzyme synthesis. Induction, Enzyme
D000094802 beta-D-Galactoside alpha 2-6-Sialyltransferase Sialyltransferases that catalyze the transfer of N-ACETYLNEURAMINIC ACID from CYTIDINE MONOPHOSPHATE N-ACETYLNEURAMINIC ACID to the 6-OH of the GALACTOSE residue of N-GLYCANS. CMP-Acetylneuraminate Galactoside (alpha 2-6)-Sialyltransferase,CMP-N-Acetylneuraminate-Galactosylglycoprotein Sialyltransferase ST6GAL,CMP-N-Acetylneuraminate-beta-Galactoside alpha-2,6-Sialyltransferase,CMP-N-Acetylneuraminic Acid-Lactose Sialytransferase,CMP-NeuAc-Galactoside (alpha 2-6)-Sialyltransferase,CMP-Sialic Acid-N-Acetyllactosaminide alpha (2-6)-Sialyltransferase,Gal-1-4-GlcNAc alpha(2-6)-Sialyltransferase,alpha 2-6-Sialyltransferase,alpha2,6(N) Sialyltransferase,alpha6-Sialyltransferase,beta-D-Galactoside alpha-2-6-Sialyltransferase,beta-Galactoside alpha2,6-Sialyltransferase,beta-Galactosyl(1-4)N-Acetylglucosaminide alpha(2-6)-Sialyltransferase,Gal-GlcNAc(2-6)-sialyltransferase,SIAT-1,ST6(N),ST6Gal I,ST6Gal-1,2-6-Sialyltransferase, alpha,2-6-Sialyltransferase, beta-D-Galactoside alpha,Acid-Lactose Sialytransferase, CMP-N-Acetylneuraminic,CMP N Acetylneuraminate Galactosylglycoprotein Sialyltransferase ST6GAL,CMP N Acetylneuraminate beta Galactoside alpha 2,6 Sialyltransferase,CMP N Acetylneuraminic Acid Lactose Sialytransferase,SIAT 1,ST6GAL, CMP-N-Acetylneuraminate-Galactosylglycoprotein Sialyltransferase,ST6Gal 1,Sialyltransferase ST6GAL, CMP-N-Acetylneuraminate-Galactosylglycoprotein,Sialytransferase, CMP-N-Acetylneuraminic Acid-Lactose,alpha 2 6 Sialyltransferase,alpha 2-6-Sialyltransferase, beta-D-Galactoside,alpha-2,6-Sialyltransferase, CMP-N-Acetylneuraminate-beta-Galactoside,alpha-2-6-Sialyltransferase, beta-D-Galactoside,alpha2,6-Sialyltransferase, beta-Galactoside,alpha6 Sialyltransferase,beta D Galactoside alpha 2 6 Sialyltransferase,beta Galactoside alpha2,6 Sialyltransferase
D000595 Amino Acid Sequence The order of amino acids as they occur in a polypeptide chain. This is referred to as the primary structure of proteins. It is of fundamental importance in determining PROTEIN CONFORMATION. Protein Structure, Primary,Amino Acid Sequences,Sequence, Amino Acid,Sequences, Amino Acid,Primary Protein Structure,Primary Protein Structures,Protein Structures, Primary,Structure, Primary Protein,Structures, Primary Protein
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D000944 Antigens, Differentiation, B-Lymphocyte Membrane antigens associated with maturation stages of B-lymphocytes, often expressed in tumors of B-cell origin. Antigens, Differentiation, B-Cell,B-Cell Differentiation Antigens,B-Lymphocyte Differentiation Antigens,Blast-2 Antigen, B-Cell,Differentiation Antigens, B-Cell,Differentiation Antigens, B-Lymphocyte,Leu Antigens, B-Lymphocyte,Plasma Cell Antigens PC-1,Antigens, Differentiation, B Lymphocyte,Antigens, Plasma Cell, PC-1,B-Cell Blast-2 Antigen,Antigen, B-Cell Blast-2,Antigens, B-Cell Differentiation,Antigens, B-Lymphocyte Differentiation,Antigens, B-Lymphocyte Leu,B Cell Blast 2 Antigen,B Cell Differentiation Antigens,B Lymphocyte Differentiation Antigens,B-Lymphocyte Leu Antigens,Blast 2 Antigen, B Cell,Differentiation Antigens, B Cell,Differentiation Antigens, B Lymphocyte,Leu Antigens, B Lymphocyte,Plasma Cell Antigens PC 1
D001483 Base Sequence The sequence of PURINES and PYRIMIDINES in nucleic acids and polynucleotides. It is also called nucleotide sequence. DNA Sequence,Nucleotide Sequence,RNA Sequence,DNA Sequences,Base Sequences,Nucleotide Sequences,RNA Sequences,Sequence, Base,Sequence, DNA,Sequence, Nucleotide,Sequence, RNA,Sequences, Base,Sequences, DNA,Sequences, Nucleotide,Sequences, RNA

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