3R2W

Crystal Strucutre of UDP-glucose Pyrophosphorylase of Homo Sapiens


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.6 Å
  • R-Value Free: 0.304 
  • R-Value Work: 0.247 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

The crystal structure of human UDP-glucose pyrophosphorylase reveals a latch effect that influences enzymatic activity.

Yu, Q.Zheng, X.

(2012) Biochem.J. 442: 283-291

  • DOI: 10.1042/BJ20111598

  • PubMed Abstract: 
  • UGPase (UDP-glucose pyrophosphorylase) is highly conserved among eukaryotes. UGPase reversibly catalyses the formation of UDP-glucose and is critical in carbohydrate metabolism. Previous studies have mainly focused on the UGPases from plants, fungi a ...

    UGPase (UDP-glucose pyrophosphorylase) is highly conserved among eukaryotes. UGPase reversibly catalyses the formation of UDP-glucose and is critical in carbohydrate metabolism. Previous studies have mainly focused on the UGPases from plants, fungi and parasites, and indicate that the regulatory mechanisms responsible for the enzyme activity vary among different organisms. In the present study, the crystal structure of hUGPase (human UGPase) was determined and shown to form octamers through end-to-end and side-by-side interactions. The observed latch loop in hUGPase differs distinctly from yUGPase (yeast UGPase), which could explain why hUGPase and yUGPase possess different enzymatic activities. Mutagenesis studies showed that both dissociation of octamers and mutations of the latch loop can significantly affect the UGPase activity. Moreover, this latch effect is also evolutionarily meaningful in UGPase from different species.


    Organizational Affiliation

    State Key Laboratory of Protein and Plant Gene Research, School of Life Sciences, Peking University, Beijing, P.R. China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
UTP--glucose-1-phosphate uridylyltransferase
A, B, C, D
528Homo sapiensMutation(s): 0 
Gene Names: UGP2 (UGP1)
EC: 2.7.7.9
Find proteins for Q16851 (Homo sapiens)
Go to Gene View: UGP2
Go to UniProtKB:  Q16851
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.6 Å
  • R-Value Free: 0.304 
  • R-Value Work: 0.247 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 140.445α = 90.00
b = 140.445β = 90.00
c = 311.724γ = 120.00
Software Package:
Software NamePurpose
REFMACrefinement
PHASERphasing
PDB_EXTRACTdata extraction
HKL-2000data reduction
HKL-2000data scaling
HKL-2000data collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2011-03-14 
  • Released Date: 2012-02-08 
  • Deposition Author(s): Zheng, X., Yu, Q.

Revision History 

  • Version 1.0: 2012-02-08
    Type: Initial release
  • Version 1.1: 2012-02-29
    Type: Database references