1G6X

ULTRA HIGH RESOLUTION STRUCTURE OF BOVINE PANCREATIC TRYPSIN INHIBITOR (BPTI) MUTANT WITH ALTERED BINDING LOOP SEQUENCE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 0.86 Å
  • R-Value Free: 0.140 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Ultrahigh-resolution structure of a BPTI mutant.

Addlagatta, A.Krzywda, S.Czapinska, H.Otlewski, J.Jaskolski, M.

(2001) Acta Crystallogr.,Sect.D 57: 649-663


  • PubMed Abstract: 
  • The crystal structure of a mutant of bovine pancreatic trypsin inhibitor has been refined to 0.86 A resolution using low-temperature synchrotron data. The variant contains three mutations in the binding loop (Thr11Ala, Pro13Ala, Lys15Arg) and an unre ...

    The crystal structure of a mutant of bovine pancreatic trypsin inhibitor has been refined to 0.86 A resolution using low-temperature synchrotron data. The variant contains three mutations in the binding loop (Thr11Ala, Pro13Ala, Lys15Arg) and an unrelated Met52Leu substitution. Refinement with anisotropic displacement parameters and with removal of main-chain stereochemical restraints converged with R = 0.1035. The use of full-matrix refinement provided an estimate of the variances in the derived parameters. Some stereochemical parameters, such as the planarity of the peptide group and the value of the N-C(alpha)-C angle, show a wide spread, suggesting that the standard values used as restraints in protein structure refinements may not always be entirely appropriate. Comparison with the recently determined room-temperature structure of the same mutant at 1.42 A resolution confirms the previous observations and provides new details, such as a double conformation of the main chain at Leu29 and at Gly56-Gly57, a high proportion (over 20%) of residues in double conformations, correlation of disorder through lattice contacts and the positions of H atoms, including those in water molecules, and their involvement in C-H...O and N-H...pi hydrogen bonds.


    Related Citations: 
    • Crystallographic Refinement of the Structure of Bovine Pancreatic Trypsin Inhibitor at 1.5 A Resolution
      Deisenhofer, J.,Steigemann, W.
      (1975) Acta Crystallogr.,Sect.B 31: 238
    • Determination of a High Quality Nuclear Magnetic Resonance Solution Structure of the Bovine Pancreatic Trypsin Inhibitor and Comparison with Three Crystal Structures
      Berndt, K.,Guentert, P.,Orbons, L.P.,Wuethrich, K.
      (1992) J.Mol.Biol. 227: 757
    • Structure of Bovine Pancreatic Trypsin Inhibitor at 125 K: Definition of Carboxyl-Terminal Residues Gly57 and Ala58
      Parkin, S.,Rupp, B.,Hope, H.
      (1996) Acta Crystallogr.,Sect.D 52: 19
    • Structure of Bovine Pancreatic Trypsin Inhibitor . Results of Joint Neutron and X-Ray Refinement of Crystal Form II
      Wlodawer, A.,Walter, J.,Huber, R.,Sjolin, L.
      (1984) J.Mol.Biol. 180: 301
    • High-Resolution Structure of Bovine Pancreatic Trypsin Inhibitor with Altered Binding Loop Sequenc
      Czapinska, H.,Otlewski, J.,Krzywda, S.,Sheldrick, G.M.,Jaskolski, M.
      (2000) J.Mol.Biol. 295: 1237


    Organizational Affiliation

    Center for Biocrystallographic Research, Institute of Bioorganic Chemistry, Polish Academy of Sciences, Poznan, Poland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PANCREATIC TRYPSIN INHIBITOR
A
58Bos taurusN/A
Find proteins for P00974 (Bos taurus)
Go to UniProtKB:  P00974
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
EDO
Query on EDO

Download SDF File 
Download CCD File 
A
1,2-ETHANEDIOL
ETHYLENE GLYCOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 0.86 Å
  • R-Value Free: 0.140 
  • Space Group: P 43 21 2
Unit Cell:
Length (Å)Angle (°)
a = 51.891α = 90.00
b = 51.891β = 90.00
c = 43.035γ = 90.00
Software Package:
Software NamePurpose
DENZOdata reduction
SHELXL-97refinement
SHELXmodel building
SHELXphasing
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-05-09
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance