1fhq

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{{STRUCTURE_1fhq| PDB=1fhq | SCENE= }}
{{STRUCTURE_1fhq| PDB=1fhq | SCENE= }}
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'''REFINED SOLUTION STRUCTURE OF THE FHA2 DOMAIN OF RAD53'''
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===REFINED SOLUTION STRUCTURE OF THE FHA2 DOMAIN OF RAD53===
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==Overview==
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The forkhead-associated (FHA) domain is a protein module found in many proteins involved in cell signaling in response to DNA damage. It has been suggested to bind to pThr sites of its target protein. Recently we have determined the first structure of an FHA domain, FHA2 from the yeast protein Rad53, and demonstrated that FHA2 binds to a pTyr-containing peptide (826)EDI(pY)YLD(832) from Rad9, with a moderate affinity (K(d) ca. 100 microM). We now report the solution structure of the complex of FHA2 bound with this pTyr peptide. The structure shows that the phosphate group of pTyr interacts directly with three arginine residues (605, 617, and 620), and that the leucine residue at the +2 position from the pTyr interacts with a hydrophobic surface on FHA2. The sequence specificity of FHA2 was determined by screening a combinatorial pTyr library. The results clearly show that FHA2 recognizes specific sequences C-terminal to pTyr with the following consensus: XX(pY)N(1)N(2)N(3), where N(1)=Leu, Met, Phe, or Ile, N(2)=Tyr, Phe, Leu, or Met, and N(3)=Phe, Leu, or Met. Two of the selected peptides, GF(pY)LYFIR and DV(pY)FYMIR, bind FHA2 with K(d) values of 1.1 and 5.0 microM, respectively. The results, along with other recent reports, demonstrate that the FHA domain is a new class of phosphoprotein-binding domain, capable of binding both pTyr and pThr sequences.
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(as it appears on PubMed at http://www.pubmed.gov), where 10993733 is the PubMed ID number.
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{{ABSTRACT_PUBMED_10993733}}
==About this Structure==
==About this Structure==
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1FHQ is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Saccharomyces_cerevisiae Saccharomyces cerevisiae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1FHQ OCA].
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1FHQ is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Saccharomyces_cerevisiae Saccharomyces cerevisiae]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1FHQ OCA].
==Reference==
==Reference==
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[[Category: Phosphotyrosine]]
[[Category: Phosphotyrosine]]
[[Category: Rad53]]
[[Category: Rad53]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 16:20:19 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 1 03:15:51 2008''

Revision as of 00:15, 1 July 2008

Image:1fhq.png

Template:STRUCTURE 1fhq

REFINED SOLUTION STRUCTURE OF THE FHA2 DOMAIN OF RAD53

Template:ABSTRACT PUBMED 10993733

About this Structure

1FHQ is a Single protein structure of sequence from Saccharomyces cerevisiae. Full experimental information is available from OCA.

Reference

II. Structure and specificity of the interaction between the FHA2 domain of Rad53 and phosphotyrosyl peptides., Wang P, Byeon IJ, Liao H, Beebe KD, Yongkiettrakul S, Pei D, Tsai MD, J Mol Biol. 2000 Sep 29;302(4):927-40. PMID:10993733

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