Biological Assembly 1  

 3D View: Structure

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 3-mer - A2B1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 30.73 kDa 
• Atom Count: 2175 
• Modelled Residue Count: 286 
• Deposited Residue Count: 286 
• Unique protein chains: 2

1AWI

HUMAN PLATELET PROFILIN COMPLEXED WITH THE L-PRO10 PEPTIDE

• DOI: 10.2210/pdb1AWI/pdb

• Classification: COMPLEX (ACTIN-BINDING PROTEIN/PEPTIDE)
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 1997-10-02 Released: 1998-10-28 
• Deposition Author(s): Mahoney, N.M., Almo, S.C.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Free: 0.305 
• R-Value Work: 0.204 
• R-Value Observed: 0.204 

Literature

Structure of the profilin-poly-L-proline complex involved in morphogenesis and cytoskeletal regulation.

Mahoney, N.M., Janmey, P.A., Almo, S.C.

(1997) Nat Struct Biol 4: 953-960

• PubMed: 9360613 
• DOI: 10.1038/nsb1197-953
• Primary Citation of Related Structures:  
  1AWI


• PubMed Abstract: 
  

Profilin, a ubiquitous low molecular weight (13,000-15,000 M(r)) actin binding protein, regulates the formation of F-actin structures in vivo, and is localized to specific cellular regions through interaction with proline-rich sequences. Here we report the 2.2 A X-ray structure of the complex between human platelet profilin (HPP) and a decamer of L-proline (L-Pro10). The L-Pro10 peptide adopts a left-handed type II poly-L-proline helix (PPII) and binds to a highly conserved patch of aromatic amino acids on the surface of profilin. The peptide and actin binding sites reside on orthogonal surfaces, and L-Pro10 binding does not result in a conformational rearrangement of HPP. This structure suggests a mechanism for the localization of profilin and its actin-related activities to sites of actin filament assembly in vivo.

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Related Citations: 

• Crystallization and Preliminary X-Ray Analysis of Human Platelet Profilin Complexed with an Oligo Proline Peptide
  Mahoney, N.M., Almo, S.C.
  (1998) Acta Crystallogr D Biol Crystallogr 54: 108

• Erratum. Structure of the Profilin-Poly-L-Proline Complex Involved in Morphogenesis and Cytoskeletal Regulation
  Mahoney, N.M., Janmey, P.A., Almo, S.C.
  (1997) Nat Struct Biol 4: 1047

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Organizational Affiliation: 

Department of Biochemistry, Albert Einstein College of Medicine, Bronx, New York 10461, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
PROFILIN	A, B	138	Homo sapiens	Mutation(s): 0  Gene Names: PFN1
UniProt & NIH Common Fund Data Resources
Find proteins for P07737 (Homo sapiens) Explore P07737  Go to UniProtKB:  P07737
PHAROS:  P07737 GTEx:  ENSG00000108518

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
L-PRO10	C [auth P]	10	N/A	Mutation(s): 0

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Free: 0.305 
• R-Value Work: 0.204 
• R-Value Observed: 0.204 
• Space Group: P 2₁ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 68.25	α = 90
b = 97.64	β = 90
c = 39.1	γ = 90

Software Package:

Software Name	Purpose
PHASES	phasing
X-PLOR	refinement
XDS	data reduction
XSCALE	data scaling
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1997-10-02 
• Released Date: 1998-10-28 
Deposition Author(s): Mahoney, N.M., Almo, S.C.

Revision History  

• Version 1.0: 1998-10-28
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance