1V4T

Crystal structure of human glucokinase

1V4T の概要

• エントリーDOI: 10.2210/pdb1v4t/pdb
• 関連するPDBエントリー: 1V4T
• 分子名称: glucokinase isoform 2, SULFATE ION, SODIUM ION, ... (4 entities in total)
• 機能のキーワード: hexokinase iv, allosteric enzyme, diabetes, transferase
• 由来する生物種: Homo sapiens (human)
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 50825.62

構造登録者

Kamata, K.,Mitsuya, M.,Nishimura, T.,Eiki, J.,Nagata, Y. (登録日: 2003-11-19, 公開日: 2004-03-30, 最終更新日: 2023-11-08)

主引用文献

Kamata, K.,Mitsuya, M.,Nishimura, T.,Eiki, J.,Nagata, Y.
Structural basis for allosteric regulation of the monomeric allosteric enzyme human glucokinase
Structure, 12:429-438, 2004

PubMed Abstract: Glucokinase is a monomeric enzyme that displays a low affinity for glucose and a sigmoidal saturation curve for its substrate, two properties that are important for its playing the role of a glucose sensor in pancreas and liver. The molecular basis for these two properties is not well understood. Herein we report the crystal structures of glucokinase in its active and inactive forms, which demonstrate that global conformational change, including domain reorganization, is induced by glucose binding. This suggests that the positive cooperativity of monomeric glucokinase obeys the "mnemonical mechanism" rather than the well-known concerted model. These structures also revealed an allosteric site through which small molecules may modulate the kinetic properties of the enzyme. This finding provided the mechanistic basis for activation of glucokinase as a potential therapeutic approach for treating type 2 diabetes mellitus.

PubMed: 15016359
DOI: 10.1016/j.str.2004.02.005

実験手法

X-RAY DIFFRACTION (3.4 Å)