1AKS

CRYSTAL STRUCTURE OF THE FIRST ACTIVE AUTOLYSATE FORM OF THE PORCINE ALPHA TRYPSIN


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Work: 0.200 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The first structure at 1.8 A resolution of an active autolysate form of porcine alpha-trysoin.

Johnson, A.Krishnaswamy, S.Sundaram, P.V.Pattabhi, V.

(1997) Acta Crystallogr.,Sect.D 53: 311-315

  • DOI: 10.1107/S0907444997000358

  • PubMed Abstract: 
  • The first crystal structure of an active autolysate form of porcine alpha-trypsin (APT), a two-chain molecule obtained from the limited autolysis of porcine beta-trypsin at position Lys145-Ser146, has been determined. APT crystallizes in space group ...

    The first crystal structure of an active autolysate form of porcine alpha-trypsin (APT), a two-chain molecule obtained from the limited autolysis of porcine beta-trypsin at position Lys145-Ser146, has been determined. APT crystallizes in space group P2(1)2(1)2(1) with one protein molecule in the asymmetric unit. The structure was solved by molecular replacement followed by refinement using X-PLOR to an R factor of 0.200 and an R(free) of 0.285 for 8.0-1.8 A data with r.m.s deviations from ideal values of 0.01 A and 1.7 degrees for bond lengths and bond angles, respectively. Comparison with inactive autolysate porcine epsilon-trypsin (EPT) and porcine beta-trypsin in complex with bittergourd trypsin inhibitor (MCT) revealed a small but systematic directional chain shift around the active-site residues from APT to EPT to MCT.


    Organizational Affiliation

    Department of Crystallography and Biophysics, University of Madras, India.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ALPHA TRYPSIN
A
125Sus scrofaMutation(s): 0 
EC: 3.4.21.4
Find proteins for P00761 (Sus scrofa)
Go to UniProtKB:  P00761
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
ALPHA TRYPSIN
B
98Sus scrofaMutation(s): 0 
EC: 3.4.21.4
Find proteins for P00761 (Sus scrofa)
Go to UniProtKB:  P00761
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download SDF File 
Download CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Work: 0.200 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 77.700α = 90.00
b = 53.820β = 90.00
c = 47.080γ = 90.00
Software Package:
Software NamePurpose
X-PLORrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1997-02-12
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance