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J. Biol. Chem., Vol. 277, Issue 6, 3979-3984, February 8, 2002
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From the N-Acetylglucosamine-6-O-sulfotransferase
(GlcNAc6ST) catalyzes the transfer of sulfate from adenosine
3'-phosphate,5'-phosphosulfate to the C-6 position of the non-reducing
GlcNAc. Three human GlcNAc6STs, namely GlcNAc6ST-1, GlcNAc6ST-2
(HEC-GlcNAc6ST), and GlcNAc6ST-3 (I-GlcNAc6ST), were produced as fusion
proteins to protein A, and their substrate specificities as well as
their enzymological properties were determined. Both GlcNAc6ST-1 and
GlcNAc6ST-2 efficiently utilized the following oligosaccharide
structures as acceptors: GlcNAc
Specificities of
N-Acetylglucosamine-6-O-sulfotransferases in
Relation to L-selectin Ligand Synthesis and Tumor-associated Enzyme
Expression*
§,
¶,
,
,
,
¶¶
Department of Biochemistry, Nagoya
University School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya
466-8550, Japan,
Thios Biotechnology, Oakland, California 94609, the ** Department of Microbiology-Immunology, Northwestern
University School of Medicine, Chicago, Illinois 60611-3008, and the
§§ Program of Molecular Pathology, Aichi
Cancer Center, Research Institute, 1-1 Kanokoden, Chikusa-ku, Nagoya
464-8681, Japan
1-6[Gal
1-3]GalNAc-pNP (core
2), GlcNAc
1-6ManOMe, and GlcNAc
1-2Man. The ratios of
activities to these substrates were not significantly different between
the two enzymes. However, GlcNAc6ST-2 but not GlcNAc6ST-1 acted on core
3 of GlcNAc
1-3GalNAc-pNP. GlcNAc6ST-3 used only the core 2 structure among the above mentioned oligosaccharide structures. The
ability of GlcNAc6ST-1 to sulfate core 2 structure as efficiently as
GlcNAc6ST-2 is consistent with the view that GlcNAc6ST-1 is also
involved in the synthesis of L-selectin ligand. Indeed,
cells doubly transfected with GlcNAc6ST-1 and fucosyltransferase VII
cDNAs supported the rolling of L-selectin-expressing cells. The
activity of GlcNAc6ST-2 on core 3 and its expression in mucinous
adenocarcinoma suggested that this enzyme corresponds to the
sulfotransferase, which is specifically expressed in mucinous adenocarcinoma (Seko, A., Sumiya, J., Yonezawa, S., Nagata, K., and
Yamashita, K. (2000) Glycobiology 10, 919-929).
*
This work was supported by Grants-in-aid 12003898 and
12480187 for Scientific Research from the Japan Society for the
Promotion of Science (to K. U. and T. M.), Grant-in-aid 10178102 for
Scientific Research on Priority Areas from the Ministry of Education,
Science, Culture, and Sports of Japan (to T. M.), and National
Institutes of Health Grant HL55647 (to G. S. K.).The costs of publication of this
article were defrayed in part by the
payment of page charges. The article
must therefore be hereby marked
"advertisement" in accordance with 18 U.S.C. Section
1734 solely to indicate this fact.

Established Investigator of the American Heart Association.
¶¶
To whom correspondence should be addressed. Tel.:
81-52-744-2059; Fax: 81-52-744-2065; E-mail:
tmurama@med.nagoya-u.ac.jp.
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