1H71

Psychrophilic Protease from Pseudoalteromonas 'TAC II 18'


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.221 
  • R-Value Work: 0.164 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Crystal Structures of a Psychrophilic Metalloprotease Reveal New Insights Into Catalysis by Cold-Adapted Proteases

Aghajari, N.Van Petegem, F.Villeret, V.Chessa, J.-P.Gerday, C.Haser, R.Van Beeumen, J.

(2003) Proteins: Struct.,Funct., Genet. 50: 636

  • DOI: 10.1002/prot.10264
  • Primary Citation of Related Structures:  1G9K

  • PubMed Abstract: 
  • Enzymes from psychrophilic organisms differ from their mesophilic counterparts in having a lower thermostability and a higher specific activity at low and moderate temperatures. It is in general accepted that psychrophilic enzymes are more flexible t ...

    Enzymes from psychrophilic organisms differ from their mesophilic counterparts in having a lower thermostability and a higher specific activity at low and moderate temperatures. It is in general accepted that psychrophilic enzymes are more flexible to allow easy accommodation and transformation of the substrates at low energy costs. Here, we report the structures of two crystal forms of the alkaline protease from an Antarctic Pseudomonas species (PAP), solved to 2.1- and 1.96-A resolution, respectively. Comparative studies of PAP structures with mesophilic counterparts show that the overall structures are similar but that the conformation of the substrate-free active site in PAP resembles that of the substrate-bound region of the mesophilic homolog, with both an active-site tyrosine and a substrate-binding loop displaying a conformation as in the substrate-bound form of the mesophilic proteases. Further, a region in the catalytic domain of PAP undergoes a conformational change with a loop movement as large as 13 A, induced by the binding of an extra calcium ion. Finally, the active site is more accessible due to deletions occurring in surrounding loop regions.


    Organizational Affiliation

    Institut de Biologie et Chimie des Protéines, UMR 5086, Laboratoire de Bio-Cristallographie, CNRS et Université Claude Bernard Lyon I, Lyon, France. n.aghajari@ibcp.fr




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
SERRALYSIN
P
463Pseudomonas sp. 'TAC II 18'Gene Names: PAPRA
EC: 3.4.24.40
Find proteins for O69771 (Pseudomonas sp. 'TAC II 18')
Go to UniProtKB:  O69771
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
P
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
CA
Query on CA

Download SDF File 
Download CCD File 
P
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.221 
  • R-Value Work: 0.164 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 54.000α = 90.00
b = 57.550β = 90.00
c = 161.810γ = 90.00
Software Package:
Software NamePurpose
AMoREphasing
REFMACrefinement
SCALEPACKdata scaling
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-02-13
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-06-28
    Type: Data collection