2TBS

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 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
  • Primary Citation of Related Structures:  
    2TBS

  • 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 structural rationalizations for the cold-adaption features of salmon trypsin ...

    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 D Biol Crystallogr 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 B 39: 480

    Organizational Affiliation

    Department of Chemistry, University of Tromsø, Norway.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
TRYPSINA222Salmo salarMutation(s): 0 
EC: 3.4.21.4
UniProt
Find proteins for P35031 (Salmo salar)
Explore P35031 
Go to UniProtKB:  P35031
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
BEN
Query on BEN

Download Ideal Coordinates CCD File 
C [auth A]BENZAMIDINE
C7 H8 N2
PXXJHWLDUBFPOL-UHFFFAOYSA-N
 Ligand Interaction
CA
Query on CA

Download Ideal Coordinates CCD File 
B [auth A]CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 61.95α = 90
b = 84.33β = 90
c = 39.11γ = 90
Software Package:
Software NamePurpose
PROLSQrefinement

Structure Validation

View Full Validation Report




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  (Full details and data files)

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