Biological Assembly 1  

 3D View: Structure

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Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 14940.02 
• Atom Count: 1046 
• Residue Count: 139 
• Unique protein chains: 1

1PFL

REFINED SOLUTION STRUCTURE OF HUMAN PROFILIN I

• DOI: 10.2210/pdb1PFL/pdb
• BMRB: 4082

• Classification: REGULATORY PROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli


• Deposited: 1994-12-12 Released: 1995-03-31 
• Deposition Author(s): Metzler, W.J., Farmer II, B.T., Constantine, K.L., Friedrichs, M.S., Lavoie, T., Mueller, L.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Submitted: 20 

Literature

Refined solution structure of human profilin I.

Metzler, W.J., Farmer 2nd., B.T., Constantine, K.L., Friedrichs, M.S., Lavoie, T., Mueller, L.

(1995) Protein Sci. 4: 450-459

• PubMed: 7795529 
• DOI: 10.1002/pro.5560040312


• PubMed Abstract: 
  

Profilin is a ubiquitous eukaryotic protein that binds to both cytosolic actin and the phospholipid phosphatidylinositol-4,5-bisphosphate. These dual competitive binding capabilities of profilin suggest that profilin serves as a link between the phosphatidyl inositol cycle and actin polymerization, and thus profilin may be an essential component in the signaling pathway leading to cytoskeletal rearrangement. The refined three-dimensional solution structure of human profilin I has been determined using multidimensional heteronuclear NMR spectroscopy. Twenty structures were selected to represent the solution conformational ensemble. This ensemble of structures has root-mean-square distance deviations from the mean structure of 0.58 A for the backbone atoms and 0.98 A for all non-hydrogen atoms. Comparison of the solution structure of human profilin to the crystal structure of bovine profilin reveals that, although profilin adopts essentially identical conformations in both states, the solution structure is more compact than the crystal structure. Interestingly, the regions that show the most structural diversity are located at or near the actin-binding site of profilin. We suggest that structural differences are reflective of dynamical properties of profilin that facilitate favorable interactions with actin. The global folding pattern of human profilin also closely resembles that of Acanthamoeba profilin I, reflective of the 22% sequence identity and approximately 45% sequence similarity between these two proteins.

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Related Citations: 

• Identification of the Poly-L-Proline-Binding Site on Human Profilin
  Metzler, W.J.,Bell, A.J.,Ernst, E.,Lavoie, T.B.,Mueller, L.
  (1994) J.Biol.Chem. 269: 4620
• Characterization of the Three-Dimensional Solution Structure of Human Profilin: 1H, 13C, and 15N NMR Assignments and Global Folding Pattern
  Metzler, W.J.,Constantine, K.L.,Friedrichs, M.S.,Bell, A.J.,Ernst, E.G.,Lavoie, T.B.,Mueller, L.
  (1993) Biochemistry 32: 13818
• Relaxation Study of the Backbone Dynamics of Human Profilin by Two-Dimensional 1H-15N NMR
  Constantine, K.L.,Friedrichs, M.S.,Bell, A.J.,Lavoie, T.B.,Mueller, L.,Metzler, W.J.
  (1993) FEBS Lett. 336: 457




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Organizational Affiliation: 

Department of Macromolecular NMR, Bristol-Myers Squibb Pharmaceutical Research Institute, Princeton, New Jersey 08543-400, USA.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
PROFILIN I	A	139	Homo sapiens	Mutation(s): 0  Gene Names: PFN1
Find proteins for P07737 (Homo sapiens) Go to Gene View: PFN1 Go to UniProtKB:  P07737

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Submitted: 20 
• Olderado: 1PFL Olderado

Software Package:

Software Name	Purpose
X-PLOR	phasing
X-PLOR	model building
X-PLOR	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1994-12-12 
• Released Date: 1995-03-31 
• Deposition Author(s): Metzler, W.J., Farmer II, B.T., Constantine, K.L., Friedrichs, M.S., Lavoie, T., Mueller, L.

Revision History 

• Version 1.0: 1995-03-31
  Type: Initial release
• Version 1.1: 2008-03-24
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance
• Version 1.3: 2017-11-29
  Type: Derived calculations, Other