1V4T

Crystal structure of human glucokinase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.4 Å
  • R-Value Free: 0.307 
  • R-Value Work: 0.237 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural basis for allosteric regulation of the monomeric allosteric enzyme human glucokinase

Kamata, K.Mitsuya, M.Nishimura, T.Eiki, J.Nagata, Y.

(2004) Structure 12: 429-438

  • DOI: 10.1016/j.str.2004.02.005
  • Primary Citation of Related Structures:  1V4S
  • Also Cited By: 3FR0

  • 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 f ...

    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.


    Organizational Affiliation

    Banyu Tsukuba Research Institute in collaboration with Merck Research Laboratories, Okubo 3, Tsukuba, Ibaraki 300-2611, Japan. kenji_kamata@merck.com




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
glucokinase isoform 2
A
451Homo sapiensGene Names: GCK
EC: 2.7.1.2
Find proteins for P35557 (Homo sapiens)
Go to Gene View: GCK
Go to UniProtKB:  P35557
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NA
Query on NA

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Download CCD File 
A
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.4 Å
  • R-Value Free: 0.307 
  • R-Value Work: 0.237 
  • Space Group: P 65 2 2
Unit Cell:
Length (Å)Angle (°)
a = 103.180α = 90.00
b = 103.180β = 90.00
c = 281.020γ = 120.00
Software Package:
Software NamePurpose
AMoREphasing
MOSFLMdata reduction
CCP4data scaling
CNXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-03-30
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance