1TON

RAT SUBMAXILLARY GLAND SERINE PROTEASE, TONIN. STRUCTURE SOLUTION AND REFINEMENT AT 1.8 ANGSTROMS RESOLUTION


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Rat submaxillary gland serine protease, tonin. Structure solution and refinement at 1.8 A resolution.

Fujinaga, M.James, M.N.

(1987) J.Mol.Biol. 195: 373-396


  • PubMed Abstract: 
  • Tonin is a mammalian serine protease that is capable of generating the vasoconstrictive agent, angiotensin II, directly from its precursor protein, angiotensinogen, a process that normally requires two enzymes, renin and angiotensin-converting enzyme ...

    Tonin is a mammalian serine protease that is capable of generating the vasoconstrictive agent, angiotensin II, directly from its precursor protein, angiotensinogen, a process that normally requires two enzymes, renin and angiotensin-converting enzyme. The X-ray crystallographic structure determination and refinement of tonin at 1.8 A resolution and the analysis of the resulting model are reported. The initial phases were obtained by the method of molecular replacement using as the search model the structure of bovine trypsin. The refined model of tonin consists of 227 amino acid residues out of the 235 in the complete molecule, 149 water molecules, and one zinc ion. The R-factor (R = sigma Fo - Fc/sigma Fo) is 0.196 for the 14,997 measured data between 8 and 1.8 A resolution with I greater than or equal to sigma (I). It is estimated that the overall root-mean-square error in the coordinates is about 0.3 A. The structure of tonin that has been determined is not in its active conformation, but one that has been perturbed by the binding of Zn2+ in the active site. Zn2+ was included in the buffer to aid the crystallization. Nevertheless, the structure of tonin that is described is for the most part similar to its native form as indicated by the close tertiary structural homology with kallikrein. The differences in the structures of the two enzymes are concentrated in several loop regions; these structural differences are probably responsible for the differences in their reactivities and specificities.


    Related Citations: 
    • Kallikrein-Related M/Rnas of the Rat Submaxillary Gland. Nucleotide Sequences of Four Distinct Types Including Tonin
      Ashley, P.L.,Macdonald, R.J.
      (1985) Biochemistry 24: 4512
    • Crystal Data for Tonin, an Enzyme Involved in the Formation of Angiotensin II
      Hayakawa, K.,Kelly, J.A.,James, M.N.G.
      (1978) J.Mol.Biol. 123: 107
    • Amino Acid Sequence of Rat Submaxillary Tonin Reveals Similarities to Serine Proteases
      Lazure, C.,Leduc, R.,Seidah, N.G.,Thibault, G.,Genest, J.,Chretien, M.
      (1984) Nature 307: 555


    Organizational Affiliation

    Department of Biochemistry, University of Alberta, Edmonton, Canada.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TONIN
A
235Rattus norvegicusGene Names: Klk2 (Klk-2, Ton)
EC: 3.4.21.35
Find proteins for P00759 (Rattus norvegicus)
Go to UniProtKB:  P00759
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • Space Group: P 43 21 2
Unit Cell:
Length (Å)Angle (°)
a = 48.580α = 90.00
b = 48.580β = 90.00
c = 200.200γ = 90.00
Software Package:
Software NamePurpose
PROLSQrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1988-01-16
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance
  • Version 1.3: 2017-11-29
    Type: Advisory, Derived calculations, Other