3UJP

Structure of MntC protein at 2.7A


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.284 
  • R-Value Work: 0.231 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Arginine 116 stabilizes the entrance to the metal ion-binding site of the MntC protein.

Kanteev, M.Adir, N.

(2013) Acta Crystallogr.,Sect.F 69: 237-242

  • DOI: 10.1107/S174430911300153X
  • Primary Citation of Related Structures:  4IRM

  • PubMed Abstract: 
  • The cyanobacterium Synechocystis sp. PCC 6803 imports Mn2+ ions via MntCAB, an ABC transport system that is expressed at submicromolar Mn2+ concentrations. The structures of the wild type (WT) and a site-directed mutant of the MntC solute-binding pro ...

    The cyanobacterium Synechocystis sp. PCC 6803 imports Mn2+ ions via MntCAB, an ABC transport system that is expressed at submicromolar Mn2+ concentrations. The structures of the wild type (WT) and a site-directed mutant of the MntC solute-binding protein have been determined at 2.7 and 3.5 Å resolution, respectively. The WT structure is significantly improved over the previously determined structure (PDB entry 1xvl), showing improved Mn2+ binding site parameters, disulfide bonds in all three monomers and ions bound to the protein surface, revealing the role of Zn2+ ions in the crystallization liquor. The structure of MntC reveals that the active site is surrounded by neutral-to-positive electrostatic potential and is dominated by a network of polar interactions centred around Arg116. The mutation of this residue to alanine was shown to destabilize loops in the entrance to the metal-ion binding site and suggests a possible role in MntC function.


    Organizational Affiliation

    Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Technion City, Haifa 32000, Israel.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Mn transporter subunit
A, B, C
307Synechocystis sp. (strain PCC 6803 / Kazusa)Gene Names: mntC
Find proteins for Q79EF9 (Synechocystis sp. (strain PCC 6803 / Kazusa))
Go to UniProtKB:  Q79EF9
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MN
Query on MN

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Download CCD File 
A, B, C
MANGANESE (II) ION
Mn
WAEMQWOKJMHJLA-UHFFFAOYSA-N
 Ligand Interaction
ZN
Query on ZN

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Download CCD File 
A, C
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
CAC
Query on CAC

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Download CCD File 
A, C
CACODYLATE ION
dimethylarsinate
C2 H6 As O2
OGGXGZAMXPVRFZ-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.284 
  • R-Value Work: 0.231 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 127.520α = 90.00
b = 127.520β = 90.00
c = 89.730γ = 120.00
Software Package:
Software NamePurpose
PHENIXrefinement
PHASERphasing
DNAdata collection
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2011-11-08 
  • Released Date: 2012-11-14 
  • Deposition Author(s): Kanteev, M., Adir, N.

Revision History 

  • Version 1.0: 2012-11-14
    Type: Initial release
  • Version 1.1: 2013-02-06
    Type: Database references
  • Version 1.2: 2013-03-13
    Type: Database references
  • Version 1.3: 2013-06-19
    Type: Database references