1S0P | pdb_00001s0p

Structure of the N-Terminal Domain of the Adenylyl Cyclase-Associated Protein (CAP) from Dictyostelium discoideum.

• PDB DOI: https://doi.org/10.2210/pdb1S0P/pdb
• Entry: 1S0P supersedes: 1PN1

• Classification: MEMBRANE PROTEIN
• Organism(s): Dictyostelium discoideum
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2004-01-01 Released: 2004-01-27 
• Deposition Author(s): Ksiazek, D., Brandstetter, H., Israel, L., Bourenkov, G.P., Katchalova, G., Janssen, K.P., Bartunik, H.D., Noegel, A.A., Schleicher, M., Holak, T.A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.40 Å
• R-Value Free: 
  0.210 (Depositor) 
• R-Value Work: 
  0.180 (Depositor) 
• R-Value Observed: 
  0.260 (Depositor) 

Literature

STRUCTURE OF THE N-TERMINAL DOMAIN OF THE ADENYLYL CYCLASE-ASSOCIATED PROTEIN (CAP) FROM DICTYOSTELIUM DISCOIDEUM

Ksiazek, D., Brandstetter, H., Israel, L., Bourenkov, G.P., Katchalova, G., Janssen, K.P., Bartunik, H.D., Noegel, A.A., Schleicher, M., Holak, T.A.

(2003) Structure 11: 1171-1178

• PubMed: 12962635 
• DOI: https://doi.org/10.1016/s0969-2126(03)00180-1
• Primary Citation Related Structures: 
  1S0P


• PubMed Abstract: 
  

  Cyclase-associated proteins (CAPs) are widely distributed and highly conserved proteins that regulate actin remodeling in response to cellular signals. The N termini of CAPs play a role in Ras signaling and bind adenylyl cyclase; the C termini bind to G-actin and thereby alter the dynamic rearrangements of the microfilament system. We report here the X-ray structure of the core of the N-terminal domain of the CAP from Dictyostelium discoideum, which comprises residues 51-226, determined by a combination of single isomorphous replacement with anomalous scattering (SIRAS). The overall structure of this fragment is an alpha helix bundle composed of six antiparallel helices. Results from gel filtration and crosslinking experiments for CAP(1-226), CAP(255-464), and the full-length protein, together with the CAP N-terminal domain structure and the recently determined CAP C-terminal domain structure, provide evidence that the functional structure of CAP is multimeric.

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Organizational Affiliation: 
• Max-Planck Institut für Biochemie, 82152 Martinsried, Germany.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 39.38 kDa 
• Atom Count: 3,379 
• Modeled Residue Count: 352 
• Deposited Residue Count: 352 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Adenylyl cyclase-associated protein	A, B	176	Dictyostelium discoideum	Mutation(s): 0  Gene Names: CAP
UniProt
Find proteins for P54654 (Dictyostelium discoideum) Explore P54654  Go to UniProtKB:  P54654

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
MG	C [auth A]	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.40 Å
• R-Value Free:  0.210 (Depositor) 
• R-Value Work:  0.180 (Depositor) 
• R-Value Observed: 0.260 (Depositor) 

Space Group: P 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 37.52	α = 97.42
b = 42.13	β = 105.09
c = 53.74	γ = 97.15

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
CNS	refinement
CNS	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2004-01-27 
Deposition Author(s): Ksiazek, D., Brandstetter, H., Israel, L., Bourenkov, G.P., Katchalova, G., Janssen, K.P., Bartunik, H.D., Noegel, A.A., Schleicher, M., Holak, T.A.
• This entry supersedes: 1PN1

Revision History  

• Version 1.0: 2004-01-27
  Type: Initial release
  
• Version 1.1: 2008-04-29
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2024-02-14
  Changes: Data collection, Database references, Derived calculations