4RWT

Structure of actin-Lmod complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.98 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.248 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Mechanisms of leiomodin 2-mediated regulation of actin filament in muscle cells.

Chen, X.Ni, F.Kondrashkina, E.Ma, J.Wang, Q.

(2015) Proc.Natl.Acad.Sci.USA 112: 12687-12692

  • DOI: 10.1073/pnas.1512464112
  • Also Cited By: 5WFN

  • PubMed Abstract: 
  • Leiomodin (Lmod) is a class of potent tandem-G-actin-binding nucleators in muscle cells. Lmod mutations, deletion, or instability are linked to lethal nemaline myopathy. However, the lack of high-resolution structures of Lmod nucleators in action sev ...

    Leiomodin (Lmod) is a class of potent tandem-G-actin-binding nucleators in muscle cells. Lmod mutations, deletion, or instability are linked to lethal nemaline myopathy. However, the lack of high-resolution structures of Lmod nucleators in action severely hampered our understanding of their essential cellular functions. Here we report the crystal structure of the actin-Lmod2162-495 nucleus. The structure contains two actin subunits connected by one Lmod2162-495 molecule in a non-filament-like conformation. Complementary functional studies suggest that the binding of Lmod2 stimulates ATP hydrolysis and accelerates actin nucleation and polymerization. The high level of conservation among Lmod proteins in sequence and functions suggests that the mechanistic insights of human Lmod2 uncovered here may aid in a molecular understanding of other Lmod proteins. Furthermore, our structural and mechanistic studies unraveled a previously unrecognized level of regulation in mammalian signal transduction mediated by certain tandem-G-actin-binding nucleators.


    Organizational Affiliation

    Verna and Marrs McLean Department of Biochemistry and Molecular Biology, Baylor College of Medicine, Houston, TX 77030;




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Actin-5C
A, B
384Drosophila melanogasterMutations: P323K, K292E
Gene Names: Act5C
Find proteins for P10987 (Drosophila melanogaster)
Go to UniProtKB:  P10987
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Leiomodin-2
C, D
506Homo sapiensMutations: K437G, K438S, K439G, K440S, K445G, K442G, K446S, K443S
Gene Names: LMOD2
Find proteins for Q6P5Q4 (Homo sapiens)
Go to Gene View: LMOD2
Go to UniProtKB:  Q6P5Q4
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ANP
Query on ANP

Download SDF File 
Download CCD File 
A, B
PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER
C10 H17 N6 O12 P3
PVKSNHVPLWYQGJ-KQYNXXCUSA-N
 Ligand Interaction
MG
Query on MG

Download SDF File 
Download CCD File 
A, B
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.98 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.248 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 65.350α = 101.29
b = 65.650β = 90.94
c = 81.920γ = 107.97
Software Package:
Software NamePurpose
REFMACrefinement
PHENIXmodel building
MOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-10-14
    Type: Initial release
  • Version 1.1: 2015-10-28
    Type: Database references