1PSI

Intact recombined alpha1-antitrypsin mutant PHE 51 to LEU


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.92 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.218 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Inhibitory conformation of the reactive loop of alpha 1-antitrypsin.

Elliott, P.R.Lomas, D.A.Carrell, R.W.Abrahams, J.P.

(1996) Nat.Struct.Mol.Biol. 3: 676-681


  • PubMed Abstract: 
  • The reactive site loop of the serpin family of serine proteinase inhibitors is flexible and can adopt a number of diverse conformations. A 2.9 A resolution structure of alpha 1-antitrypsin-the principal proteinase inhibitor in human plasma-shows the ...

    The reactive site loop of the serpin family of serine proteinase inhibitors is flexible and can adopt a number of diverse conformations. A 2.9 A resolution structure of alpha 1-antitrypsin-the principal proteinase inhibitor in human plasma-shows the loop in a stable canonical conformation matching that found in all other families of serine proteinase inhibitors. This unexpected finding in the absence of loop insertion into the body of the molecule favours a two-stage mechanism of inhibition and provides a model for the heparin activation of antithrombin. The beta-pleated strand conformation of the loop also accounts for the polymerization of the serpins in disease and for their association with other beta-sheet structures, most notably the beta-amyloid of Alzheimer's disease.


    Organizational Affiliation

    Department of Haematology, University of Cambridge, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ALPHA=1=-ANTITRYPSIN
A
394Homo sapiensMutation(s): 1 
Gene Names: SERPINA1 (AAT, PI)
Find proteins for P01009 (Homo sapiens)
Go to Gene View: SERPINA1
Go to UniProtKB:  P01009
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
SCS
Query on SCS
A
L-peptide linkingC5 H11 N O2 S2CYS
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.92 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.218 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 112.958α = 90.00
b = 38.508β = 104.85
c = 88.928γ = 90.00
Software Package:
Software NamePurpose
CCP4data scaling
MOSFLMdata reduction
X-PLORmodel building
X-PLORphasing
X-PLORrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1996-12-07
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance