6FM2

CARP domain of mouse cyclase-associated protein 1 (CAP1) bound to ADP-actin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.183 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural basis of actin monomer re-charging by cyclase-associated protein.

Kotila, T.Kogan, K.Enkavi, G.Guo, S.Vattulainen, I.Goode, B.L.Lappalainen, P.

(2018) Nat Commun 9: 1892-1892

  • DOI: 10.1038/s41467-018-04231-7

  • PubMed Abstract: 
  • Actin polymerization powers key cellular processes, including motility, morphogenesis, and endocytosis. The actin turnover cycle depends critically on "re-charging" of ADP-actin monomers with ATP, but whether this reaction requires dedicated proteins ...

    Actin polymerization powers key cellular processes, including motility, morphogenesis, and endocytosis. The actin turnover cycle depends critically on "re-charging" of ADP-actin monomers with ATP, but whether this reaction requires dedicated proteins in cells, and the underlying mechanism, have remained elusive. Here we report that nucleotide exchange catalyzed by the ubiquitous cytoskeletal regulator cyclase-associated protein (CAP) is critical for actin-based processes in vivo. We determine the structure of the CAP-actin complex, which reveals that nucleotide exchange occurs in a compact, sandwich-like complex formed between the dimeric actin-binding domain of CAP and two ADP-actin monomers. In the crystal structure, the C-terminal tail of CAP associates with the nucleotide-sensing region of actin, and this interaction is required for rapid re-charging of actin by both yeast and mammalian CAPs. These data uncover the conserved structural basis and biological role of protein-catalyzed re-charging of actin monomers.


    Organizational Affiliation

    Institute of Biotechnology, University of Helsinki, 00014, Helsinki, Finland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Actin, alpha skeletal muscle
A
375Oryctolagus cuniculusMutation(s): 0 
Gene Names: ACTA1 (ACTA)
Find proteins for P68135 (Oryctolagus cuniculus)
Go to Gene View: ACTA1
Go to UniProtKB:  P68135
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Adenylyl cyclase-associated protein 1
B
158Mus musculusMutation(s): 0 
Gene Names: Cap1 (Cap)
Find proteins for P40124 (Mus musculus)
Go to UniProtKB:  P40124
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ADP
Query on ADP

Download SDF File 
Download CCD File 
A
ADENOSINE-5'-DIPHOSPHATE
C10 H15 N5 O10 P2
XTWYTFMLZFPYCI-KQYNXXCUSA-N
 Ligand Interaction
MG
Query on MG

Download SDF File 
Download CCD File 
A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
HIC
Query on HIC
A
L-PEPTIDE LINKINGC7 H11 N3 O2HIS
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.183 
  • Space Group: P 61 2 2
Unit Cell:
Length (Å)Angle (°)
a = 73.833α = 90.00
b = 73.833β = 90.00
c = 453.377γ = 120.00
Software Package:
Software NamePurpose
XDSdata reduction
BUSTERrefinement
Cootmodel building
Aimlessdata scaling
BALBESphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Academy of FinlandFinland272130
Academy of FinlandFinland307415
European Research CouncilFinland290974
National Institutes of Health/National Human Genome Research InstituteUnited StatesR01 GM063691
National Science Foundation (United States)United StatesDMR-1420382

Revision History 

  • Version 1.0: 2018-05-16
    Type: Initial release
  • Version 1.1: 2018-05-23
    Type: Data collection, Database references