5I69

MBP-MamC magnetite-interaction component mutant-D70A


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.293 
  • R-Value Work: 0.204 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structure-function studies of the magnetite-biomineralizing magnetosome-associated protein MamC.

Nudelman, H.Valverde-Tercedor, C.Kolusheva, S.Perez Gonzalez, T.Widdrat, M.Grimberg, N.Levi, H.Nelkenbaum, O.Davidov, G.Faivre, D.Jimenez-Lopez, C.Zarivach, R.

(2016) J.Struct.Biol. 194: 244-252

  • DOI: 10.1016/j.jsb.2016.03.001

  • PubMed Abstract: 
  • Magnetotactic bacteria are Gram-negative bacteria that navigate along geomagnetic fields using the magnetosome, an organelle that consists of a membrane-enveloped magnetic nanoparticle. Magnetite formation and its properties are controlled by a speci ...

    Magnetotactic bacteria are Gram-negative bacteria that navigate along geomagnetic fields using the magnetosome, an organelle that consists of a membrane-enveloped magnetic nanoparticle. Magnetite formation and its properties are controlled by a specific set of proteins. MamC is a small magnetosome-membrane protein that is known to be active in iron biomineralization but its mechanism has yet to be clarified. Here, we studied the relationship between the MamC magnetite-interaction loop (MIL) structure and its magnetite interaction using an inert biomineralization protein-MamC chimera. Our determined structure shows an alpha-helical fold for MamC-MIL with highly charged surfaces. Additionally, the MamC-MIL induces the formation of larger magnetite crystals compared to protein-free and inert biomineralization protein control experiments. We suggest that the connection between the MamC-MIL structure and the protein's charged surfaces is crucial for magnetite binding and thus for the size control of the magnetite nanoparticles.


    Organizational Affiliation

    Department of Life Sciences and the National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev, Beer Sheva, Israel.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Maltose-binding periplasmic protein,Tightly bound bacterial magnetic particle protein,Maltose-binding periplasmic protein
A
412Magnetospirillum magneticum (strain AMB-1 / ATCC 700264)Escherichia coli (strain K12)
This entity is chimeric
Mutation(s): 1 
Gene Names: mms13, malE
Find proteins for Q2W8S0 (Magnetospirillum magneticum (strain AMB-1 / ATCC 700264))
Go to UniProtKB:  Q2W8S0
Find proteins for P0AEX9 (Escherichia coli (strain K12))
Go to UniProtKB:  P0AEX9
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MAL
Query on MAL

Download SDF File 
Download CCD File 
A
MALTOSE
C12 H22 O11
GUBGYTABKSRVRQ-ASMJPISFSA-N
 Ligand Interaction
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.293 
  • R-Value Work: 0.204 
  • Space Group: P 43 21 2
Unit Cell:
Length (Å)Angle (°)
a = 67.236α = 90.00
b = 67.236β = 90.00
c = 209.019γ = 90.00
Software Package:
Software NamePurpose
Cootmodel building
HKL-2000data scaling
PHASERphasing
REFMACrefinement
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-03-23
    Type: Initial release
  • Version 1.1: 2016-05-04
    Type: Database references