4Z79

Leiomodin-1 Actin-Binding Site 2 (ABS2)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.54 Å
  • R-Value Free: 0.177 
  • R-Value Work: 0.156 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

How Leiomodin and Tropomodulin use a common fold for different actin assembly functions.

Boczkowska, M.Rebowski, G.Kremneva, E.Lappalainen, P.Dominguez, R.

(2015) Nat Commun 6: 8314-8314

  • DOI: 10.1038/ncomms9314
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • How proteins sharing a common fold have evolved different functions is a fundamental question in biology. Tropomodulins (Tmods) are prototypical actin filament pointed-end-capping proteins, whereas their homologues, Leiomodins (Lmods), are powerful f ...

    How proteins sharing a common fold have evolved different functions is a fundamental question in biology. Tropomodulins (Tmods) are prototypical actin filament pointed-end-capping proteins, whereas their homologues, Leiomodins (Lmods), are powerful filament nucleators. We show that Tmods and Lmods do not compete biochemically, and display similar but distinct localization in sarcomeres. Changes along the polypeptide chains of Tmods and Lmods exquisitely adapt their functions for capping versus nucleation. Tmods have alternating tropomyosin (TM)- and actin-binding sites (TMBS1, ABS1, TMBS2 and ABS2). Lmods additionally contain a C-terminal extension featuring an actin-binding WH2 domain. Unexpectedly, the different activities of Tmods and Lmods do not arise from the Lmod-specific extension. Instead, nucleation by Lmods depends on two major adaptations-the loss of pointed-end-capping elements present in Tmods and the specialization of the highly conserved ABS2 for recruitment of two or more actin subunits. The WH2 domain plays only an auxiliary role in nucleation.


    Organizational Affiliation

    Department of Physiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA.,Institute of Biotechnology, PO Box 56, 00014 University of Helsinki, Helsinki, Finland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Leiomodin-1 Actin-Binding Site 2 (ABS2)
A
188Homo sapiensMutation(s): 0 
Gene Names: LMOD1
Find proteins for P29536 (Homo sapiens)
Go to Gene View: LMOD1
Go to UniProtKB:  P29536
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NA
Query on NA

Download SDF File 
Download CCD File 
A
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
CL
Query on CL

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Download CCD File 
A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
GOL
Query on GOL

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Download CCD File 
A
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.54 Å
  • R-Value Free: 0.177 
  • R-Value Work: 0.156 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 49.019α = 90.00
b = 52.192β = 90.00
c = 75.890γ = 90.00
Software Package:
Software NamePurpose
SAINTdata scaling
PHENIXrefinement
PHENIXphasing
SAINTdata reduction
Cootmodel building

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesR01 GM073791

Revision History 

  • Version 1.0: 2015-10-21
    Type: Initial release
  • Version 1.1: 2017-09-20
    Type: Author supporting evidence, Derived calculations, Refinement description
  • Version 1.2: 2018-03-07
    Type: Data collection
  • Version 1.3: 2019-12-25
    Type: Author supporting evidence