4APW

Alp12 filament structure


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 19.7 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Novel Actin-Like Filament Structure from Clostridium Tetani.

Popp, D.Narita, A.Lee, L.J.Ghoshdastider, U.Xue, B.Srinivasan, R.Balasubramanian, M.K.Tanaka, T.Robinson, R.C.

(2012) J.Biol.Chem. 287: 21121

  • DOI: 10.1074/jbc.M112.341016

  • PubMed Abstract: 
  • Eukaryotic F-actin is constructed from two protofilaments that gently wind around each other to form a helical polymer. Several bacterial actin-like proteins (Alps) are also known to form F-actin-like helical arrangements from two protofilaments, yet ...

    Eukaryotic F-actin is constructed from two protofilaments that gently wind around each other to form a helical polymer. Several bacterial actin-like proteins (Alps) are also known to form F-actin-like helical arrangements from two protofilaments, yet with varied helical geometries. Here, we report a unique filament architecture of Alp12 from Clostridium tetani that is constructed from four protofilaments. Through fitting of an Alp12 monomer homology model into the electron microscopy data, the filament was determined to be constructed from two antiparallel strands, each composed of two parallel protofilaments. These four protofilaments form an open helical cylinder separated by a wide cleft. The molecular interactions within single protofilaments are similar to F-actin, yet interactions between protofilaments differ from those in F-actin. The filament structure and assembly and disassembly kinetics suggest Alp12 to be a dynamically unstable force-generating motor involved in segregating the pE88 plasmid, which encodes the lethal tetanus toxin, and thus a potential target for drug design. Alp12 can be repeatedly cycled between states of polymerization and dissociation, making it a novel candidate for incorporation into fuel-propelled nanobiopolymer machines.


    Organizational Affiliation

    Institute of Molecular and Cell Biology, 61 Biopolis Drive, Proteos, Singapore 138673. dpopp@imcb.a-star.edu.sg




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ALP12
A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P
329Clostridium tetani (strain Massachusetts / E88)Mutation(s): 0 
Find proteins for Q89A01 (Clostridium tetani (strain Massachusetts / E88))
Go to UniProtKB:  Q89A01
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 19.7 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-05-16
    Type: Initial release
  • Version 1.1: 2012-06-27
    Type: Other
  • Version 1.2: 2013-09-25
    Type: Other
  • Version 1.3: 2018-10-03
    Type: Author supporting evidence, Data collection