4IW1

HSA-fructose complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.56 Å
  • R-Value Free: 0.315 
  • R-Value Work: 0.239 
  • R-Value Observed: 0.243 

wwPDB Validation 3D Report Full Report


This is version 1.2 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: 10.1074/jbc.M113.467027
  • Structures With Same Primary Citation

  • 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 ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Serum albumin
A
585Homo sapiensMutation(s): 0 
Gene Names: ALBGIG20GIG42PRO0903PRO1708PRO2044PRO2619PRO2675UNQ696/PRO1341
Find proteins for P02768 (Homo sapiens)
Go to UniProtKB:  P02768
NIH Common Fund Data Resources
PHAROS  P02768
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FRU
Query on FRU

Download CCD File 
A
FRUCTOSE
C6 H12 O6
RFSUNEUAIZKAJO-ARQDHWQXSA-N
 Ligand Interaction
FUD
Query on FUD

Download CCD File 
A
D-fructose
C6 H12 O6
BJHIKXHVCXFQLS-UYFOZJQFSA-N
 Ligand Interaction
PO4
Query on PO4

Download CCD File 
A
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.56 Å
  • R-Value Free: 0.315 
  • R-Value Work: 0.239 
  • R-Value Observed: 0.243 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 58.363α = 90
b = 87.985β = 102.7
c = 59.35γ = 90
Software Package:
Software NamePurpose
CNSrefinement
HKL-2000data collection
HKL-2000data reduction
HKL-2000data scaling
CNSphasing
REFMACrefinement

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-04-24
    Type: Initial release
  • Version 1.1: 2014-03-19
    Changes: Database references
  • Version 1.2: 2014-12-10
    Changes: Structure summary