1BVA

MANGANESE BINDING MUTANT IN CYTOCHROME C PEROXIDASE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.89 Å
  • R-Value Observed: 0.179 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.6 of the entry. See complete history


Literature

Rational design of a functional metalloenzyme: introduction of a site for manganese binding and oxidation into a heme peroxidase.

Wilcox, S.K.Putnam, C.D.Sastry, M.Blankenship, J.Chazin, W.J.McRee, D.E.Goodin, D.B.

(1998) Biochemistry 37: 16853-16862

  • DOI: https://doi.org/10.1021/bi9815039
  • Primary Citation of Related Structures:  
    1BVA

  • PubMed Abstract: 

    The design of a series of functionally active models for manganese peroxidase (MnP) is described. Artificial metal binding sites were created near the heme of cytochrome c peroxidase (CCP) such that one of the heme propionates could serve as a metal ligand. At least two of these designs, MP6.1 and MP6.8, bind Mn2+ with Kd congruent with 0.2 mM, react with H2O2 to form stable ferryl heme species, and catalyze the steady-state oxidation of Mn2+ at enhanced rates relative to WT CCP. The kinetic parameters for this activity vary considerably in the presence of various dicarboxylic acid chelators, suggesting that the similar features displayed by native MnP are largely intrinsic to the manganese oxidation reaction rather than due to a specific interaction between the chelator and enzyme. Analysis of pre-steady-state data shows that electron transfer from Mn2+ to both the Trp-191 radical and the ferryl heme center of compound ES is enhanced by the metal site mutations, with transfer to the ferryl center showing the greatest stimulation. These properties are perplexingly similar to those reported for an alternate model for this site (1), despite rather distinct features of the two designs. Finally, we have determined the crystal structure at 1.9 A of one of our designs, MP6.8, in the presence of MnSO4. A weakly occupied metal at the designed site appears to coordinate two of the proposed ligands, Asp-45 and the heme 7-propionate. Paramagnetic nuclear magnetic resonance spectra also suggest that Mn2+ is interacting with the heme 7-propionate in MP6.8. The structure provides a basis for understanding the similar results of Yeung et al. (1), and suggests improvements for future designs.


  • Organizational Affiliation

    Department of Molecular Biology, MB8, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
PROTEIN (CYTOCHROME C PEROXIDASE)294Saccharomyces cerevisiaeMutation(s): 3 
Gene Names: CCP (MKT)
EC: 1.11.1.5
UniProt
Find proteins for P00431 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P00431 
Go to UniProtKB:  P00431
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP00431
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
HEM
Query on HEM

Download Ideal Coordinates CCD File 
C [auth A]PROTOPORPHYRIN IX CONTAINING FE
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L
MN
Query on MN

Download Ideal Coordinates CCD File 
B [auth A]MANGANESE (II) ION
Mn
WAEMQWOKJMHJLA-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.89 Å
  • R-Value Observed: 0.179 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 105.8α = 90
b = 73.6β = 90
c = 50.5γ = 90
Software Package:
Software NamePurpose
SHELXL-97refinement
XTALVIEWrefinement
X-GENdata reduction
X-GENdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1998-12-23
    Type: Initial release
  • Version 1.1: 2007-10-16
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-10-04
    Changes: Refinement description
  • Version 1.4: 2019-07-24
    Changes: Data collection, Refinement description
  • Version 1.5: 2021-11-03
    Changes: Database references, Derived calculations
  • Version 1.6: 2023-08-09
    Changes: Data collection, Refinement description