1AZR

CRYSTAL STRUCTURE OF PSEUDOMONAS AERUGINOSA ZINC AZURIN MUTANT ASP47ASP AT 2.4 ANGSTROMS RESOLUTION


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Work: 0.171 

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This is version 1.3 of the entry. See complete history


Literature

Structure of Pseudomonas aeruginosai zinc azurin mutant Asn47Asp at 2.4 A resolution.

Sjolin, L.Tsai, L.C.Langer, V.Pascher, T.Karlsson, G.Nordling, M.Nar, H.

(1993) Acta Crystallogr D Biol Crystallogr 49: 449-457

  • DOI: https://doi.org/10.1107/S0907444993005207
  • Primary Citation of Related Structures:  
    1AZR

  • PubMed Abstract: 

    The Pseudomonas aeruginosa azurin mutant Asn47Asp has been isolated, its spectroscopic and kinetic properties characterized, and the X-ray crystal structure of its zinc derivative determined. While the optical and electron paramagnetic resonance spectra as well as the electron-transfer activity of the mutant are very similar to the wild-type values, the Asn47Asp reduction potential is slightly increased by 20 mV. The mutant crystallized in the orthorhombic space group P2(1)2(1)2(1) with cell dimensions a = 57.8, b = 81.5 and c = 112.6 A. There are four molecules in the asymmetric unit, packed as a tetramer which consists of two independent dimers. The zinc site of this mutant structure is similar to the wild-type zinc azurin and, in particular, the metal-binding site is almost identical to the site found in the wild-type zinc-azurin structure [Nar, Huber, Messerschmidt, Filippou, Barth, Jaquinod, Kamp & Canters (1992). Eur. J. Biochem. 205, 1123-1129]. The Asp47 side chain at that mutation site takes on a very similar orientation to Asn47 in the wild-type structure preserving the two hydrogen bonds with the neighbouring Thr113 NH and O(gamma)H. Therefore, the increased reduction potential of the mutant is probably a result of an altered charge distribution close to the metal site.


  • Organizational Affiliation

    Department of Inorganic Chemistry, Chalmers University of Technology and the University of Göteborg, Sweden.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
AZURIN
A, B, C, D
128Pseudomonas aeruginosaMutation(s): 0 
UniProt
Find proteins for P00282 (Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1))
Explore P00282 
Go to UniProtKB:  P00282
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP00282
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Work: 0.171 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 57.81α = 90
b = 81.53β = 90
c = 112.61γ = 90
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
X-PLORphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1993-07-15
    Type: Initial release
  • Version 1.1: 2008-03-03
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2024-06-05
    Changes: Data collection, Database references, Derived calculations, Other