1V4T
Crystal structure of human glucokinase
Summary for 1V4T
| Entry DOI | 10.2210/pdb1v4t/pdb |
| Related | 1V4T |
| Descriptor | glucokinase isoform 2, SULFATE ION, SODIUM ION, ... (4 entities in total) |
| Functional Keywords | hexokinase iv, allosteric enzyme, diabetes, transferase |
| Biological source | Homo sapiens (human) |
| Total number of polymer chains | 1 |
| Total formula weight | 50825.62 |
| Authors | Kamata, K.,Mitsuya, M.,Nishimura, T.,Eiki, J.,Nagata, Y. (deposition date: 2003-11-19, release date: 2004-03-30, Last modification date: 2023-11-08) |
| Primary citation | 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 Cited by 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: 15016359DOI: 10.1016/j.str.2004.02.005 PDB entries with the same primary citation |
| Experimental method | X-RAY DIFFRACTION (3.4 Å) |
Structure validation
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