Pancreatic islet discrimination of hexose anomers. I. Steady-state computer simulation.
Pancreatic islet discrimination of hexose anomers. I. Steady-state computer simulation.
复制标题
己糖端基异构体的胰岛辨别。
DOI:
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发表时间:
1988
影响因子:
--
通讯作者:
D. Garfinkel
中科院分区:
文献类型:
--
作者:
M. J. Achs;D. Garfinkel
Pancreatic islets detect glucose level by phosphorylating it and converting the glycolytic rate to a signal to secrete insulin. Insulin secretion is greater from the alpha- than from the beta-anomer when the D-glucose level is below 22 mM. D-mannose behaves similarly but at nearly twofold higher concentrations. Two explanations have been proposed: 1) glucokinase, which has the same anomeric preference, is the principal hexose phosphorylating enzyme and limits glycolytic rate. 2) Phosphofructokinase limits glycolysis and hexokinase is the principal enzyme phosphorylating hexose; hexosediphosphate activators of phosphofructokinase are more readily synthesized from alpha-anomers of hexose phosphates. We have simulated both alternatives with a detailed anomerically specific model of the hexose-metabolizing glycolytic enzymes. The pathway preference for alpha-anomer of both hexoses was adequately reproduced with anomerically active limiting glucokinase. The other mechanism did not reproduce the observed pathway preference.
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DOI:
10.1073/pnas.80.1.85
发表时间:
1983
影响因子:
11.1
作者:
Meglasson,MD;Burch,PT;Berner,DK;Najafi,H;Vogin,AP;Matschinsky,FM
通讯作者:
Matschinsky,FM
DOI:
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发表时间:
1983
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Kitajima,S;Uyeda,K
通讯作者:
Uyeda,K
DOI:
--
发表时间:
1983
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Meglasson,MD;Matschinsky,FM
通讯作者:
Matschinsky,FM
DOI:
10.1042/bj2210759
发表时间:
1984
期刊:
The Biochemical journal
影响因子:
--
作者:
Sener,A;VanSchaftingen,E;VandeWinkel,M;Pipeleers,DG;Malaisse-Lagae,F;Malaisse,WJ;Hers,HG
通讯作者:
Hers,HG