1OS8

RECOMBINANT STREPTOMYCES GRISEUS TRYPSIN


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.55 Å
  • R-Value Free: 0.222 
  • R-Value Work: 0.196 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Engineering the Primary Substrate Specificity of Streptomyces griseus Trypsin.

Page, M.J.Wong, S.L.Hewitt, J.Strynadka, N.C.MacGillivray, R.T.

(2003) Biochemistry 42: 9060-9066

  • DOI: 10.1021/bi0344230
  • Primary Citation of Related Structures:  1OSS

  • PubMed Abstract: 
  • Streptomyces griseus trypsin (SGT) was chosen as a model scaffold for the development of serine proteases with enhanced substrate specificity. Recombinant SGT has been produced in a Bacillus subtilis expression system in a soluble active form and pur ...

    Streptomyces griseus trypsin (SGT) was chosen as a model scaffold for the development of serine proteases with enhanced substrate specificity. Recombinant SGT has been produced in a Bacillus subtilis expression system in a soluble active form and purified to homogeneity. The recombinant and native proteases have nearly identical enzymatic properties and structures. Four SGT mutants with alterations in the S1 substrate binding pocket (T190A, T190P, T190S, and T190V) were also expressed. The T190P mutant demonstrated the largest shift to a preference for Arg versus Lys in the P1 site. This was shown by a minor reduction in catalytic activity toward an Arg-containing substrate (k(cat) reduction of 25%). The crystal structures of the recombinant SGT and the T190P mutant in a complex with the inhibitor benzamidine were obtained at high resolution (approximately 1.9 A). The increase in P1 specificity, achieved with minimal effect on the catalytic efficiency, demonstrates that the T190P mutant is an ideal candidate for the design of additional substrate specificity engineered into the S2 to S4 binding pockets.


    Related Citations: 
    • Critical Comparison of Comparative Model Building of Streptomyces Griseus Trypsin
      Read, R.J.,Brayer, G.D.,Jurasek, L.,James, M.N.G.
      (1984) Biochemistry 23: 6570
    • Refined Crystal Structure of Streptomyces Griseus Trypsin at 1.7 Angstroms Resolution
      Read, R.J.,James, M.N.G.
      (1988) J.Mol.Biol. 200: 523


    Organizational Affiliation

    Department of Biochemistry and Molecular Biology, University of British Columbia, Vancouver, British Columbia V6T 1Z3, Canada.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
trypsin
A
223Streptomyces griseusGene Names: sprT
EC: 3.4.21.4
Find proteins for P00775 (Streptomyces griseus)
Go to UniProtKB:  P00775
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
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: 1.55 Å
  • R-Value Free: 0.222 
  • R-Value Work: 0.196 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 50.041α = 90.00
b = 69.824β = 90.00
c = 119.654γ = 90.00
Software Package:
Software NamePurpose
CNSrefinement
DENZOdata reduction
XTALVIEWrefinement
SCALEPACKdata scaling
CNSphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-08-19
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance