1fi6
From Proteopedia
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| - | [[Image:1fi6.gif|left|200px]] | + | [[Image:1fi6.gif|left|200px]] |
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| - | '''SOLUTION STRUCTURE OF THE REPS1 EH DOMAIN''' | + | {{Structure |
| + | |PDB= 1fi6 |SIZE=350|CAPTION= <scene name='initialview01'>1fi6</scene> | ||
| + | |SITE= | ||
| + | |LIGAND= <scene name='pdbligand=CA:CALCIUM ION'>CA</scene> | ||
| + | |ACTIVITY= | ||
| + | |GENE= | ||
| + | }} | ||
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| + | '''SOLUTION STRUCTURE OF THE REPS1 EH DOMAIN''' | ||
| + | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
| - | 1FI6 is a [ | + | 1FI6 is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Mus_musculus Mus musculus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1FI6 OCA]. |
==Reference== | ==Reference== | ||
| - | Solution structure of the Reps1 EH domain and characterization of its binding to NPF target sequences., Kim S, Cullis DN, Feig LA, Baleja JD, Biochemistry. 2001 Jun 12;40(23):6776-85. PMID:[http:// | + | Solution structure of the Reps1 EH domain and characterization of its binding to NPF target sequences., Kim S, Cullis DN, Feig LA, Baleja JD, Biochemistry. 2001 Jun 12;40(23):6776-85. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/11389591 11389591] |
[[Category: Mus musculus]] | [[Category: Mus musculus]] | ||
[[Category: Single protein]] | [[Category: Single protein]] | ||
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[[Category: ras signal transduction]] | [[Category: ras signal transduction]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 11:09:23 2008'' |
Revision as of 09:09, 20 March 2008
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SOLUTION STRUCTURE OF THE REPS1 EH DOMAIN
Overview
The recently described EH domain recognizes proteins containing Asn-Pro-Phe (NPF) sequences. Using nuclear magnetic resonance (NMR) data, we determined the solution structure of the EH domain from the Reps1 protein and characterized its binding to linear and cyclic peptides derived from a novel targeting protein. The structure calculation included 1143 distance restraints and 122 angle restraints and resulted in structures with a root-mean-square deviation of 0.40 +/- 0.05 A for backbone atoms of superimposed secondary structural elements. The structure comprises two helix-loop-helix motifs characteristic of EF-hand domains. Titration data with NPF-containing peptides showed evidence of intermediate exchange on the NMR chemical shift time scale, which required an analysis that includes curve fitting to obtain accurate equilibrium constants and dissociation rate constants. The cyclic and linear peptides bound with similar affinities (Kd = 65 +/- 17 and 46 +/- 14 microM, respectively) and to the same hydrophobic pocket formed between helices B and C. The cyclic peptide formed a complex that dissociated more slowly (k(off) = 440 +/- 110 s(-1)) than the linear peptide (k(off) = 1800 +/- 250 s(-1)), but had little change in affinity because of the slower rate of association of the cyclic peptide. In addition, we characterized binding to a peptide containing a DPF sequence (Kd = 0.5 +/- 0.2 mM). The characterization of binding between the Reps1 EH domain and its target proteins provides information about their role in endocytosis.
About this Structure
1FI6 is a Single protein structure of sequence from Mus musculus. Full crystallographic information is available from OCA.
Reference
Solution structure of the Reps1 EH domain and characterization of its binding to NPF target sequences., Kim S, Cullis DN, Feig LA, Baleja JD, Biochemistry. 2001 Jun 12;40(23):6776-85. PMID:11389591
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