1GCI

THE 0.78 ANGSTROMS STRUCTURE OF A SERINE PROTEASE-BACILLUS LENTUS SUBTILISIN


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 0.78 Å
  • R-Value Free: 0.103 
  • R-Value Observed: 0.099 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

The 0.78 A structure of a serine protease: Bacillus lentus subtilisin.

Kuhn, P.Knapp, M.Soltis, S.M.Ganshaw, G.Thoene, M.Bott, R.

(1998) Biochemistry 37: 13446-13452

  • DOI: 10.1021/bi9813983
  • Primary Citation of Related Structures:  
    1GCI

  • PubMed Abstract: 
  • Ultrahigh-resolution X-ray diffraction data from cryo-cooled, B. lentus subtilisin crystals has been collected to a resolution of 0.78 A. The refined model coordinates have a rms deviation of 0.22 A relative to the same structure determined at room t ...

    Ultrahigh-resolution X-ray diffraction data from cryo-cooled, B. lentus subtilisin crystals has been collected to a resolution of 0.78 A. The refined model coordinates have a rms deviation of 0.22 A relative to the same structure determined at room temperature and 2.0 A resolution. Several regions of main-chain and side-chain disorder have been identified for 21 out of 269 residues in one polypeptide chain. Hydrogen atoms appear as significant peaks in the Fo - Fc difference electron density map, and carbon, nitrogen, and oxygen atoms can be differentiated. The estimated standard deviation (ESD) for all main-chain non-hydrogen bond lengths is 0.009 A and 0.5 degrees for bond angles based on an unrestrained full-matrix least-squares refinement. Hydrogen bonds are resolved in the serine protease catalytic triad (Ser-His-Asp). Electron density is observed for an unusual, short hydrogen bond between aspartic acid and histidine in the catalytic triad. The hydrogen atom, identified by NMR in numerous serine proteases, appears to be shared by the heteroatoms in the bond. This represents the first reported correlation between detailed chemical features identified by NMR and those in a cryo-cooled crystallographic structure determination at ultrahigh resolution. The short hydrogen bond, designated "catalytic hydrogen bond", occurs as part of an elaborate hydrogen bond network, involving Asp of the catalytic triad. While unusual, these features appear to have conserved analogues in other serine protease families although specific details differ from family to family.


    Organizational Affiliation

    Stanford Synchrotron Radiation Laboratory, Stanford University, California 94309, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
SUBTILISINA269Bacillus lentusMutation(s): 0 
EC: 3.4.21.62
Find proteins for P29600 (Bacillus lentus)
Explore P29600 
Go to UniProtKB:  P29600
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

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

Download CCD File 
A
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
CA
Query on CA

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

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 0.78 Å
  • R-Value Free: 0.103 
  • R-Value Observed: 0.099 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 52.65α = 90
b = 61.25β = 90
c = 74.75γ = 90
Software Package:
Software NamePurpose
SHELXLrefinement
PROLSQrefinement
MOSFLMdata reduction
CCP4data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

  • Deposited Date: 1998-09-02 
  • Released Date: 1998-10-21 
  • Deposition Author(s): Bott, R., Kuhn, P.

Revision History 

  • Version 1.0: 1998-10-21
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Non-polymer description, Version format compliance