1PFL

REFINED SOLUTION STRUCTURE OF HUMAN PROFILIN I


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Submitted: 20 

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This is version 1.3 of the entry. See complete history


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

  • DOI: 10.1002/pro.5560040312
  • Primary Citation of Related Structures:  
    1PFL

  • 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 phosphat ...

    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.


    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

    Organizational Affiliation

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



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
PROFILIN I A139Homo sapiensMutation(s): 0 
Gene Names: HUMAN PROFILIN CDNAPFN1
Find proteins for P07737 (Homo sapiens)
Explore P07737 
Go to UniProtKB:  P07737
NIH Common Fund Data Resources
PHAROS:  P07737
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

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

Structure Validation

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Entry History 

Deposition Data

Revision History 

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