4IW2

HSA-glucose complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.41 Å
  • R-Value Free: 0.307 
  • R-Value Work: 0.242 
  • R-Value Observed: 0.254 

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Ligand Structure Quality Assessment 


This is version 1.4 of the entry. See complete history


Literature

Structural mechanism of ring-opening reaction of glucose by human serum albumin

Wang, Y.Yu, H.Shi, X.Luo, Z.Lin, D.Huang, M.

(2013) J Biol Chem 288: 15980-15987

  • DOI: https://doi.org/10.1074/jbc.M113.467027
  • Primary Citation of Related Structures:  
    4IW1, 4IW2, 4K2C

  • PubMed Abstract: 

    Glucose reacts with proteins nonenzymatically under physiological conditions. Such glycation is exacerbated in diabetic patients with high levels of blood sugar and induces various complications. Human albumin serum (HSA) is the most abundant protein in plasma and is glycated by glucose. The glycation sites on HSA remain controversial among different studies. Here, we report two protein crystal structures of HSA in complex with either glucose or fructose. These crystal structures reveal the presence of linear forms of sugar for both monosaccharides. The linear form of glucose forms a covalent bond to Lys-195 of HSA, but this is not the case for fructose. Based on these structures, we propose a mechanism for glucose ring opening involving both residues Lys-195 and Lys-199. These results provide mechanistic insights to understand the glucose ring-opening reaction and the glycation of proteins by monosaccharides.


  • Organizational Affiliation

    State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Serum albumin585Homo sapiensMutation(s): 0 
Gene Names: ALB
UniProt & NIH Common Fund Data Resources
Find proteins for P02768 (Homo sapiens)
Explore P02768 
Go to UniProtKB:  P02768
PHAROS:  P02768
GTEx:  ENSG00000163631 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP02768
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.41 Å
  • R-Value Free: 0.307 
  • R-Value Work: 0.242 
  • R-Value Observed: 0.254 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 57.149α = 90
b = 87.055β = 102.57
c = 58.534γ = 90
Software Package:
Software NamePurpose
CNSrefinement
HKL-2000data collection
HKL-2000data reduction
HKL-2000data scaling
GLRFphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-04-24
    Type: Initial release
  • Version 1.1: 2014-03-19
    Changes: Database references
  • Version 1.2: 2014-12-17
    Changes: Structure summary
  • Version 1.3: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Data collection, Derived calculations, Structure summary
  • Version 1.4: 2023-11-08
    Changes: Data collection, Database references, Refinement description, Structure summary