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2aje

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|RELATEDENTRY=[[1w0t|1W0T]], [[1w0u|1W0U]], [[1ign|1IGN]], [[1fex|1FEX]], [[1ba5|1BA5]], [[1msf|1MSF]]
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|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2aje FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2aje OCA], [http://www.ebi.ac.uk/pdbsum/2aje PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=2aje RCSB]</span>
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[[Category: trp]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 15:50:25 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Mar 31 01:53:28 2008''

Revision as of 22:53, 30 March 2008

Image:2aje.gif


PDB ID 2aje

Drag the structure with the mouse to rotate
Related: 1W0T, 1W0U, 1IGN, 1FEX, 1BA5, 1MSF


Resources: FirstGlance, OCA, PDBsum, RCSB
Coordinates: save as pdb, mmCIF, xml



Solution structure of the Arabidopsis thaliana telomeric repeat-binding protein DNA binding domain


Overview

The double-stranded telomeric repeat-binding protein (TRP) AtTRP1 is isolated from Arabidopsis thaliana. Using gel retardation assays, we defined the C-terminal 97 amino acid residues, Gln464 to Val560 (AtTRP1(464-560)), as the minimal structured telomeric repeat-binding domain. This region contains a typical Myb DNA-binding motif and a C-terminal extension of 40 amino acid residues. The monomeric AtTRP1(464-560) binds to a 13-mer DNA duplex containing a single repeat of an A.thaliana telomeric DNA sequence (GGTTTAG) in a 1:1 complex, with a K(D) approximately 10(-6)-10(-7) M. Nuclear magnetic resonance (NMR) examination revealed that the solution structure of AtTRP1(464-560) is a novel four-helix tetrahedron rather than the three-helix bundle structure found in typical Myb motifs and other TRPs. Binding of the 13-mer DNA duplex to AtTRP1(464-560) induced significant chemical shift perturbations of protein amide resonances, which suggests that helix 3 (H3) and the flexible loop connecting H3 and H4 are essential for telomeric DNA sequence recognition. Furthermore, similar to that in hTRF1, the N-terminal arm likely contributes to or stabilizes DNA binding. Sequence comparisons suggested that the four-helix structure and the involvement of the loop residues in DNA binding may be features unique to plant TRPs.

About this Structure

2AJE is a Single protein structure of sequence from Arabidopsis thaliana. Full crystallographic information is available from OCA.

Reference

Solution structure of the Arabidopsis thaliana telomeric repeat-binding protein DNA binding domain: a new fold with an additional C-terminal helix., Sue SC, Hsiao HH, Chung BC, Cheng YH, Hsueh KL, Chen CM, Ho CH, Huang TH, J Mol Biol. 2006 Feb 10;356(1):72-85. Epub 2005 Nov 22. PMID:16337232

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