1h0x
From Proteopedia
(New page: 200px<br /><applet load="1h0x" size="450" color="white" frame="true" align="right" spinBox="true" caption="1h0x, resolution 2.6Å" /> '''STRUCTURE OF ALBA: AN...) |
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| - | [[Image:1h0x.gif|left|200px]]<br /><applet load="1h0x" size=" | + | [[Image:1h0x.gif|left|200px]]<br /><applet load="1h0x" size="350" color="white" frame="true" align="right" spinBox="true" |
caption="1h0x, resolution 2.6Å" /> | caption="1h0x, resolution 2.6Å" /> | ||
'''STRUCTURE OF ALBA: AN ARCHAEAL CHROMATIN PROTEIN MODULATED BY ACETYLATION'''<br /> | '''STRUCTURE OF ALBA: AN ARCHAEAL CHROMATIN PROTEIN MODULATED BY ACETYLATION'''<br /> | ||
==Overview== | ==Overview== | ||
| - | Eukaryotic DNA is packaged into nucleosomes that regulate the | + | Eukaryotic DNA is packaged into nucleosomes that regulate the accessibility of the genome to replication, transcription and repair factors. Chromatin accessibility is controlled by histone modifications including acetylation and methylation. Archaea possess eukary otic-like machineries for DNA replication, transcription and information processing. The conserved archaeal DNA binding protein Alba (formerly Sso10b) interacts with the silencing protein Sir2, which regulates Alba's DNA binding affinity by deacetylation of a lysine residue. We present the crystal structure of Alba from Sulfolobus solfataricus at 2.6 A resolution (PDB code 1h0x). The fold is reminiscent of the N-terminal DNA binding domain of DNase I and the C-terminal domain of initiation factor IF3. The Alba dimer has two extended beta-hairpins flanking a central body containing the acetylated lysine, Lys16, suggesting three main points of contact with the DNA. Fluorescence, calorimetry and electrophoresis data suggest a final binding stoichiometry of approximately 5 bp DNA per Alba dimer. We present a model for the Alba-DNA interaction consistent with the available structural, biophysical and electron microscopy data. |
==About this Structure== | ==About this Structure== | ||
| - | 1H0X is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Sulfolobus_solfataricus Sulfolobus solfataricus]. Full crystallographic information is available from [http:// | + | 1H0X is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Sulfolobus_solfataricus Sulfolobus solfataricus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1H0X OCA]. |
==Reference== | ==Reference== | ||
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[[Category: Single protein]] | [[Category: Single protein]] | ||
[[Category: Sulfolobus solfataricus]] | [[Category: Sulfolobus solfataricus]] | ||
| - | [[Category: Bell, S | + | [[Category: Bell, S D.]] |
| - | [[Category: Russell, R | + | [[Category: Russell, R J.M.]] |
| - | [[Category: Taylor, G | + | [[Category: Taylor, G L.]] |
| - | [[Category: Wardleworth, B | + | [[Category: Wardleworth, B N.]] |
| - | [[Category: White, M | + | [[Category: White, M F.]] |
[[Category: acetylation]] | [[Category: acetylation]] | ||
[[Category: alba]] | [[Category: alba]] | ||
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[[Category: dna binding]] | [[Category: dna binding]] | ||
| - | ''Page seeded by [http:// | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 12:56:08 2008'' |
Revision as of 10:56, 21 February 2008
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STRUCTURE OF ALBA: AN ARCHAEAL CHROMATIN PROTEIN MODULATED BY ACETYLATION
Overview
Eukaryotic DNA is packaged into nucleosomes that regulate the accessibility of the genome to replication, transcription and repair factors. Chromatin accessibility is controlled by histone modifications including acetylation and methylation. Archaea possess eukary otic-like machineries for DNA replication, transcription and information processing. The conserved archaeal DNA binding protein Alba (formerly Sso10b) interacts with the silencing protein Sir2, which regulates Alba's DNA binding affinity by deacetylation of a lysine residue. We present the crystal structure of Alba from Sulfolobus solfataricus at 2.6 A resolution (PDB code 1h0x). The fold is reminiscent of the N-terminal DNA binding domain of DNase I and the C-terminal domain of initiation factor IF3. The Alba dimer has two extended beta-hairpins flanking a central body containing the acetylated lysine, Lys16, suggesting three main points of contact with the DNA. Fluorescence, calorimetry and electrophoresis data suggest a final binding stoichiometry of approximately 5 bp DNA per Alba dimer. We present a model for the Alba-DNA interaction consistent with the available structural, biophysical and electron microscopy data.
About this Structure
1H0X is a Single protein structure of sequence from Sulfolobus solfataricus. Full crystallographic information is available from OCA.
Reference
Structure of Alba: an archaeal chromatin protein modulated by acetylation., Wardleworth BN, Russell RJ, Bell SD, Taylor GL, White MF, EMBO J. 2002 Sep 2;21(17):4654-62. PMID:12198167
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