2TBS

COLD-ADAPTION OF ENZYMES: STRUCTURAL COMPARISON BETWEEN SALMON AND BOVINE TRYPSINS


Experimental Data Snapshot

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

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Cold adaption of enzymes: structural comparison between salmon and bovine trypsins.

Smalas, A.O.Heimstad, E.S.Hordvik, A.Willassen, N.P.Male, R.

(1994) Proteins 20: 149-166

  • DOI: 10.1002/prot.340200205

  • PubMed Abstract: 
  • The crystal structure of an anionic form of salmon trypsin has been determined at 1.82 A resolution. We report the first structure of a trypsin from a phoikilothermic organism in a detailed comparison to mammalian trypsins in order to look for struct ...

    The crystal structure of an anionic form of salmon trypsin has been determined at 1.82 A resolution. We report the first structure of a trypsin from a phoikilothermic organism in a detailed comparison to mammalian trypsins in order to look for structural rationalizations for the cold-adaption features of salmon trypsin. This form of salmon trypsin (ST II) comprises 222 residues, and is homologous to bovine trypsin (BT) in about 65% of the primary structure. The tertiary structures are similar, with an overall displacement in main chain atomic positions between salmon trypsin and various crystal structures of bovine trypsin of about 0.8 A. Intramolecular hydrogen bonds and hydrophobic interactions are compared and discussed in order to estimate possible differences in molecular flexibility which might explain the higher catalytic efficiency and lower thermostability of salmon trypsin compared to bovine trypsin. No overall differences in intramolecular interactions are detected between the two structures, but there are differences in certain regions of the structures which may explain some of the observed differences in physical properties. The distribution of charged residues is different in the two trypsins, and the impact this might have on substrate affinity has been discussed.


    Related Citations: 
    • Crystallization and Preliminary X-Ray Crystallographic Studies of Benzamidine-Inhibited Trypsin from the North Atlantic Salmon (Salmo Salar)
      Smalas, A.O.,Hordvik, A.
      (1993) Acta Crystallogr.,Sect.D 49: 318
    • Crystallization and Preliminary X-Ray Crystallographic Studies of Benzamidine-Inhibited Trypsin from the North Atlantic Salmon (Salmo Salar)
      Smalas, A.O.,Hordvik, A.,Hansen, L.K.,Hough, E.,Jynge, K.
      (1990) J.Mol.Biol. 214: 355
    • The Geometry of the Reactive Site and of the Peptide Groups in Trypsin, Trypsinogen and its Complexes with Inhibitors
      Marquart, M.,Walter, J.,Deisenhofer, J.,Bode, W.,Huber, R.
      (1983) Acta Crystallogr.,Sect.B 39: 480


    Organizational Affiliation

    Department of Chemistry, University of Tromsø, Norway.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TRYPSIN
A
222Salmo salarMutation(s): 0 
EC: 3.4.21.4
Find proteins for P35031 (Salmo salar)
Go to UniProtKB:  P35031
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download SDF File 
Download CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
BEN
Query on BEN

Download SDF File 
Download CCD File 
A
BENZAMIDINE
C7 H8 N2
PXXJHWLDUBFPOL-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 61.950α = 90.00
b = 84.330β = 90.00
c = 39.110γ = 90.00
Software Package:
Software NamePurpose
PROLSQrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 1994-01-14 
  • Released Date: 1994-04-30 
  • Deposition Author(s): Smalas, A.O.
  • This entry supersedes: 1TBS

Revision History 

  • Version 1.0: 1994-04-30
    Type: Initial release
  • Version 1.1: 2008-03-25
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance