2QUG

Crystal structure of alpha-1-antitrypsin, crystal form A


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.215 
  • R-Value Observed: 0.218 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Preventing serpin aggregation: The molecular mechanism of citrate action upon antitrypsin unfolding.

Pearce, M.C.Morton, C.J.Feil, S.C.Hansen, G.Adams, J.J.Parker, M.W.Bottomley, S.P.

(2008) Protein Sci 17: 2127-2133

  • DOI: 10.1110/ps.037234.108
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • The aggregation of antitrypsin into polymers is one of the causes of neonatal hepatitis, cirrhosis, and emphysema. A similar reaction resulting in disease can occur in other human serpins, and collectively they are known as the serpinopathies. One po ...

    The aggregation of antitrypsin into polymers is one of the causes of neonatal hepatitis, cirrhosis, and emphysema. A similar reaction resulting in disease can occur in other human serpins, and collectively they are known as the serpinopathies. One possible therapeutic strategy involves inhibiting the conformational changes involved in antitrypsin aggregation. The citrate ion has previously been shown to prevent antitrypsin aggregation and maintain the protein in an active conformation; its mechanism of action, however, is unknown. Here we demonstrate that the citrate ion prevents the initial misfolding of the native state to a polymerogenic intermediate in a concentration-dependent manner. Furthermore, we have solved the crystal structure of citrate bound to antitrypsin and show that a single citrate molecule binds in a pocket between the A and B beta-sheets, a region known to be important in maintaining antitrypsin stability.


    Organizational Affiliation

    Department of Biochemistry and Molecular Biology, Monash University, Clayton, Victoria 3800, Australia.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Alpha-1-antitrypsinA394N/AMutation(s): 0 
Gene Names: SERPINA1AATPI
Find proteins for P01009 (Homo sapiens)
Explore P01009 
Go to UniProtKB:  P01009
NIH Common Fund Data Resources
PHAROS  P01009
Protein Feature View
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  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
CSD
Query on CSD
AL-PEPTIDE LINKINGC3 H7 N O4 SCYS
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.215 
  • R-Value Observed: 0.218 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 113.368α = 90
b = 39.391β = 104.61
c = 90.154γ = 90
Software Package:
Software NamePurpose
SCALAdata scaling
AMoREphasing
REFMACrefinement
PDB_EXTRACTdata extraction
MOSFLMdata reduction

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-08-12
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Version format compliance