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1a0k

From Proteopedia

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[[Image:1a0k.gif|left|200px]]
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{{STRUCTURE_1a0k| PDB=1a0k | SCENE= }}
{{STRUCTURE_1a0k| PDB=1a0k | SCENE= }}
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'''PROFILIN I FROM ARABIDOPSIS THALIANA'''
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===PROFILIN I FROM ARABIDOPSIS THALIANA===
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==Overview==
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BACKGROUND: Profilins are small eukaryotic proteins involved in modulating the assembly of actin microfilaments in the cytoplasm. They are able to bind both phosphatidylinositol-4,5-bisphosphate and poly-L-proline (PLP) and thus play a critical role in signaling pathways. Plant profilins are of interest because immunological cross-reactivity between pollen and human profilin may be the cause of hay fever and broad allergies to pollens. RESULTS: The determination of the Arabidopsis thaliana profilin isoform I structure, using multiwavelength anomalous diffraction (MAD) to obtain structure-factor phases, is reported here. The structure of Arabidopsis profilin is similar to that of previously determined profilin structures. Conserved amino acid residues in profilins from plants, mammals, and lower eukaryotes are critically important in dictating the geometry of the PLP-binding site and the overall polypeptide fold. The main feature distinguishing plant profilins from other profilins is a solvent-filled pocket located in the most variable region of the fold. CONCLUSIONS: Comparison of the structures of SH3 domains with those of profilins from three distinct sources suggests that the mode of PLP binding may be similar. A comparison of three profilin structures from different families reveals only partial conservation of the actin-binding surface. The proximity of the semi-conserved actin-binding site and the binding pocket characteristic of plant profilins suggests that epitopes encompassing both features are responsible for the cross-reactivity of antibodies between human and plant profilins thought to be responsible for type I allergies.
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The line below this paragraph, {{ABSTRACT_PUBMED_9016723}}, adds the Publication Abstract to the page
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(as it appears on PubMed at http://www.pubmed.gov), where 9016723 is the PubMed ID number.
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{{ABSTRACT_PUBMED_9016723}}
==About this Structure==
==About this Structure==
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[[Category: Cytoskeleton]]
[[Category: Cytoskeleton]]
[[Category: Profilin]]
[[Category: Profilin]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 09:37:55 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jun 30 15:44:07 2008''

Revision as of 12:44, 30 June 2008

Image:1a0k.png

Template:STRUCTURE 1a0k

PROFILIN I FROM ARABIDOPSIS THALIANA

Template:ABSTRACT PUBMED 9016723

About this Structure

1A0K is a Single protein structure of sequence from Arabidopsis thaliana. Full crystallographic information is available from OCA.

Reference

The crystal structure of a major allergen from plants., Thorn KS, Christensen HE, Shigeta R, Huddler D, Shalaby L, Lindberg U, Chua NH, Schutt CE, Structure. 1997 Jan 15;5(1):19-32. PMID:9016723

Page seeded by OCA on Mon Jun 30 15:44:07 2008

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