Purification and properties of the glycoprotein processing N-acetylglucosaminyltransferase II from plants.
Purification and properties of the glycoprotein processing N-acetylglucosaminyltransferase II from plants.
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植物中糖蛋白加工 N-乙酰氨基葡萄糖转移酶 II 的纯化和特性。
DOI:
10.1021/bi00391a043
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发表时间:
1987
期刊:
影响因子:
2.9
通讯作者:
Elbein,AD
中科院分区:
文献类型:
--
作者:
Szumilo,T;Kaushal,GP;Elbein,AD
Department of Biochemistry, University of Texas Health Science Center, San Antonio, Texas 78284 Received January 30, 1987; Revised Manuscript Received April 20, 1987 abstract: The presence of an TV-acetylglucosaminyltransferase (GlcNAc-transferase) capable of adding a GlcNAc residue to GlcNAcMan3GlcNAc was demonstrated in mung bean seedlings. This enzyme was purified about 3400-foldby using (diethylaminoethyl) cellulose and phosphocellulose chromatographies and chromatography on Concanavalin A-Sepharose. The transferase was assayed by following the change in the migration of the [3H] mannose-labeled GlcNAc01, 2Manal, 3 (Manal, 6) Man01, 4GlcNAc on Bio-Gel P-4, or by incorporation of [3H] GlcNAc from UDP-[3H] GlcNAc into a neutral product,(GlcNAc) 2Man3GlcNAc. Thus, the purified enzyme catalyzed the addition of a GlcNAc to that mannose linked in a 1, 6 linkage to the 0-linked mannose. GlcNAc01, 2Manal, 3 (Manal, 6) Man01, 4GlcNAc was an excellent acceptor while Mana1, 6 (Mana1, 3) Man01, 4GlcNAc, Manal, 6 (Manal, 3) Manal, 6-(Manal, 3) Man01, 4GlcNAc, and Mana 1, 6 (Manal, 3) Mana 1, 6 [GlcNAcMana 1, 3] Man01, 4GlcNAc were not acceptors. Methylation analysis and enzymatic digestions showed that both terminal GlcNAc residues on (GlcNAc) 2Man3GlcNAc were attached to the mannoses in 01, 2 linkages. The GlcNAc transferase had an almost absolute requirementfor divalent cation, with Mn2+ being best at 2-3 mM. Mn2+ could notbe replaced by Mg2+ or Ca2+, but Cd2+ showed some activity. Theenzyme was also markedly stimulated by the presence of detergent and showed optimumactivity at 0.15% Triton X-100. The Km for UDP-GlcNAc was found to be 18 µ and that for GlcNAcMan3GlcNAc about 16 µ.
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影响因子:
3.9
作者:
Hori,H;JamesJr,DW;Elbein,AD
通讯作者:
Elbein,AD
影响因子:
7.8
作者:
Vitale, A;Chrispeels, M J
通讯作者:
Chrispeels, M J
DOI:
10.1016/s0021-9258(18)33975-9
发表时间:
1982-09
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Douglas;Burns;O. Touster
通讯作者:
Douglas;Burns;O. Touster
影响因子:
3.5
作者:
L. Lehle
通讯作者:
L. Lehle
DOI:
--
发表时间:
1986
期刊:
影响因子:
--
作者:
N. Takahashi;T. Hotta;H. Ishihara;M. Mori;Setsuzo Tejima;R. Bligny;T. Akazawa;S. Endo;Y. Arata
通讯作者:
Y. Arata