5MM3

Unstructured MamC magnetite-binding protein located between two helices.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.182 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The importance of the helical structure of a MamC-derived magnetite-interacting peptide for its function in magnetite formation.

Nudelman, H.Perez Gonzalez, T.Kolushiva, S.Widdrat, M.Reichel, V.Peigneux, A.Davidov, G.Bitton, R.Faivre, D.Jimenez-Lopez, C.Zarivach, R.

(2018) Acta Crystallogr D Struct Biol 74: 10-20

  • DOI: 10.1107/S2059798317017491
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Biomineralization is the process of mineral formation by organisms and involves the uptake of ions from the environment in order to produce minerals, with the process generally being mediated by proteins. Most proteins that are involved in mineral in ...

    Biomineralization is the process of mineral formation by organisms and involves the uptake of ions from the environment in order to produce minerals, with the process generally being mediated by proteins. Most proteins that are involved in mineral interactions are predicted to contain disordered regions containing large numbers of negatively charged amino acids. Magnetotactic bacteria, which are used as a model system for iron biomineralization, are Gram-negative bacteria that can navigate through geomagnetic fields using a specific organelle, the magnetosome. Each organelle comprises a membrane-enveloped magnetic nanoparticle, magnetite, the formation of which is controlled by a specific set of proteins. One of the most abundant of these proteins is MamC, a small magnetosome-associated integral membrane protein that contains two transmembrane α-helices connected by an ∼21-amino-acid peptide. In vitro studies of this MamC peptide showed that it forms a helical structure that can interact with the magnetite surface and affect the size and shape of the growing crystal. Our results show that a disordered structure of the MamC magnetite-interacting component (MamC-MIC) abolishes its interaction with magnetite particles. Moreover, the size and shape of magnetite crystals grown in in vitro magnetite-precipitation experiments in the presence of this disordered peptide were different from the traits of crystals grown in the presence of other peptides or in the presence of the helical MIC. It is suggested that the helical structure of the MamC-MIC is important for its function during magnetite formation.


    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
Sugar ABC transporter substrate-binding protein,Magnetosome protein MamC,Sugar ABC transporter substrate-binding protein
A, B
412Methanosarcina mazeiMagnetospirillum sp. XM-1
This entity is chimeric
Mutation(s): 0 
Gene Names: malE, mamC
Find proteins for A0A0F8QGU4 (Methanosarcina mazei)
Go to UniProtKB:  A0A0F8QGU4
Find proteins for A0A0U5I168 (Magnetospirillum sp. XM-1)
Go to UniProtKB:  A0A0U5I168
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MAL
Query on MAL

Download SDF File 
Download CCD File 
A, B
MALTOSE
C12 H22 O11
GUBGYTABKSRVRQ-ASMJPISFSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.182 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 115.285α = 90.00
b = 115.285β = 90.00
c = 117.171γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data scaling
REFMACrefinement
HKL-2000data reduction
Cootmodel building

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2017-10-25
    Type: Initial release
  • Version 1.1: 2018-01-03
    Type: Database references
  • Version 1.2: 2018-02-07
    Type: Database references