1PFL

REFINED SOLUTION STRUCTURE OF HUMAN PROFILIN I

PDB DOI: 10.2210/pdb1PFL/pdb
BMRB: 4082

Classification: REGULATORY PROTEIN
Organism(s): Homo sapiens
Expression System: Escherichia coli
Mutation(s): No

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.

Experimental Data Snapshot

Method: SOLUTION NMR
Conformers Submitted: 20

wwPDB Validation 3D Report Full Report

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

PubMed: 7795529 Search on PubMedSearch on PubMed Central
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 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) | 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
PROFILIN I	A	139	Homo sapiens	Mutation(s): 0 Gene Names: HUMAN PROFILIN CDNA, PFN1
UniProt & NIH Common Fund Data Resources
Find proteins for P07737 (Homo sapiens) Explore P07737 Go to UniProtKB: P07737
PHAROS: P07737 GTEx: ENSG00000108518
Entity Groups
Sequence Clusters	30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt Group	P07737
Protein Feature View Expand
Reference Sequence