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2jtg

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{{STRUCTURE_2jtg| PDB=2jtg | SCENE= }}
{{STRUCTURE_2jtg| PDB=2jtg | SCENE= }}
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'''Solution structure of the THAP-zinc finger of THAP1'''
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===Solution structure of the THAP-zinc finger of THAP1===
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==Overview==
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THAP1, the founding member of a previously uncharacterized large family of cellular proteins (THAP proteins), is a sequence-specific DNA-binding factor that has recently been shown to regulate cell proliferation through modulation of pRb/E2F cell cycle target genes. THAP1 shares its DNA-binding THAP zinc finger domain with Drosophila P element transposase, zebrafish E2F6, and several nematode proteins interacting genetically with the retinoblastoma protein pRb. In this study, we report the three-dimensional structure and structure-function relationships of the THAP zinc finger of human THAP1. Deletion mutagenesis and multidimensional NMR spectroscopy revealed that the THAP domain of THAP1 is an atypical zinc finger of approximately 80 residues, distinguished by the presence between the C2CH zinc coordinating residues of a short antiparallel beta-sheet interspersed by a long loop-helix-loop insertion. Alanine scanning mutagenesis of this loop-helix-loop motif resulted in the identification of a number of critical residues for DNA recognition. NMR chemical shift perturbation analysis was used to further characterize the residues involved in DNA binding. The combination of the mutagenesis and NMR data allowed the mapping of the DNA binding interface of the THAP zinc finger to a highly positively charged area harboring multiple lysine and arginine residues. Together, these data represent the first structure-function analysis of a functional THAP domain, with demonstrated sequence-specific DNA binding activity. They also provide a structural framework for understanding DNA recognition by this atypical zinc finger, which defines a novel family of cellular factors linked to cell proliferation and pRb/E2F cell cycle pathways in humans, fish, and nematodes.
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(as it appears on PubMed at http://www.pubmed.gov), where 18073205 is the PubMed ID number.
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{{ABSTRACT_PUBMED_18073205}}
==About this Structure==
==About this Structure==
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2JTG is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2JTG OCA].
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2JTG is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2JTG OCA].
==Reference==
==Reference==
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[[Category: Zinc finger]]
[[Category: Zinc finger]]
[[Category: Zinc-finger]]
[[Category: Zinc-finger]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Wed Apr 30 13:28:49 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jul 28 13:03:29 2008''

Revision as of 10:03, 28 July 2008

Image:2jtg.png

Template:STRUCTURE 2jtg

Solution structure of the THAP-zinc finger of THAP1

Template:ABSTRACT PUBMED 18073205

About this Structure

2JTG is a Single protein structure of sequence from Homo sapiens. Full experimental information is available from OCA.

Reference

Structure-function analysis of the THAP zinc finger of THAP1, a large C2CH DNA-binding module linked to Rb/E2F pathways., Bessiere D, Lacroix C, Campagne S, Ecochard V, Guillet V, Mourey L, Lopez F, Czaplicki J, Demange P, Milon A, Girard JP, Gervais V, J Biol Chem. 2008 Feb 15;283(7):4352-63. Epub 2007 Dec 11. PMID:18073205

Page seeded by OCA on Mon Jul 28 13:03:29 2008

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