2Z30

Crystal structure of complex form between mat-Tk-subtilisin and Tk-propeptide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.184 
  • R-Value Work: 0.151 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Four new crystal structures of Tk-subtilisin in unautoprocessed, autoprocessed and mature forms: insight into structural changes during maturation

Tanaka, S.Matsumura, H.Koga, Y.Takano, K.Kanaya, S.

(2007) J.Mol.Biol. 372: 1055-1069

  • DOI: 10.1016/j.jmb.2007.07.027
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Subtilisin from the hyperthermophilic archaeon Thermococcus kodakaraensis (Tk-subtilisin) is matured from Pro-Tk-subtilisin upon autoprocessing and degradation of the propeptide. The crystal structures of the autoprocessed and mature forms of Tk-subt ...

    Subtilisin from the hyperthermophilic archaeon Thermococcus kodakaraensis (Tk-subtilisin) is matured from Pro-Tk-subtilisin upon autoprocessing and degradation of the propeptide. The crystal structures of the autoprocessed and mature forms of Tk-subtilisin were determined at 1.89 A and 1.70 A resolution, respectively. Comparison of these structures with that of unautoprocessed Pro-Tk-subtilisin indicates that the structure of Tk-subtilisin is not seriously changed during maturation. However, one unique Ca(2+)-binding site (Ca-7) is identified in these structures. In addition, the N-terminal region of the mature domain (Gly70-Pro82), which binds tightly to the main body in the unautoprocessed form, is disordered and mostly truncated in the autoprocessed and mature forms, respectively. Interestingly, this site is formed also in the unautoprocessed form when its crystals are soaked with 10 mM CaCl(2), as revealed by the 1.87 A structure. Along with the formation of this site, the N-terminal region (Leu75-Thr80) is disordered, with the scissile peptide bond contacting with the active site. These results indicate that the calcium ion binds weakly to the Ca-7 site in the unautoprocessed form, but is trapped upon autoprocessing. We propose that the Ca-7 site is required to promote the autoprocessing reaction by stabilizing the autoprocessed form, in which the new N terminus of the mature domain is structurally disordered. Furthermore, the crystal structure of the Tk-propeptide:S324A-subtilisin complex, which was formed by the addition of separately expressed proteins, was determined at 1.65 A resolution. This structure is virtually identical with that of the autoprocessed form, indicating that the interaction between the two domains is highly intensive and specific.


    Organizational Affiliation

    Department of Material and Life Science, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, Japan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Tk-subtilisin
A
320Thermococcus kodakarensis (strain ATCC BAA-918 / JCM 12380 / KOD1)Mutation(s): 1 
EC: 3.4.21.-
Find proteins for P58502 (Thermococcus kodakarensis (strain ATCC BAA-918 / JCM 12380 / KOD1))
Go to UniProtKB:  P58502
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Tk-subtilisin
B
65Thermococcus kodakarensis (strain ATCC BAA-918 / JCM 12380 / KOD1)Mutation(s): 0 
EC: 3.4.21.-
Find proteins for P58502 (Thermococcus kodakarensis (strain ATCC BAA-918 / JCM 12380 / KOD1))
Go to UniProtKB:  P58502
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
B
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 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: 1.65 Å
  • R-Value Free: 0.184 
  • R-Value Work: 0.151 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 64.289α = 90.00
b = 68.514β = 90.00
c = 73.627γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data reduction
HKL-2000data scaling
REFMACrefinement
MOLREPphasing
HKL-2000data collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-12-04
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Derived calculations, Source and taxonomy, Version format compliance