1doq

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[[Image:1doq.gif|left|200px]]
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{{STRUCTURE_1doq| PDB=1doq | SCENE= }}
{{STRUCTURE_1doq| PDB=1doq | SCENE= }}
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'''THE C-TERMINAL DOMAIN OF THE RNA POLYMERASE ALPHA SUBUNIT FROM THERMUS THERMOPHILUS'''
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===THE C-TERMINAL DOMAIN OF THE RNA POLYMERASE ALPHA SUBUNIT FROM THERMUS THERMOPHILUS===
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==Overview==
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The C-terminal domain of the alpha subunit of the RNA polymerase (alphaCTD) from Escherichia coli (Ec) regulates transcription by interacting with many kinds of proteins and promoter upstream (UP) elements consisting of AT-rich sequences. However, it is unclear how this system is common in all eubacteria. We investigate the structure and properties of alphaCTD from an extremely thermophilic eubacterium, Thermus thermophilus (Tt). The solution structure of Tt alphaCTD (85 amino acids) was determined by NMR, and the interaction between Tt alphaCTD and DNA with different sequences was investigated by means of chemical shift perturbation experiments. The tertiary structure of Tt alphaCTD is almost identical with that of Ec alphaCTD despite 32% sequence homology. However, Tt alphaCTD interacts with the upstream region sequence of the promoter in the Tt 16 S ribosomal protein operon rather than the Ec UP element DNA. The upstream region sequence of Tt is composed of 25 base pairs with 40% AT, unlike the Ec UP element with 80% AT. The DNA binding site in Tt alphaCTD is located on the surface composed of helix 4 and the loop preceding helix 4. The electric charges on this surface are not remarkably localized like those of Ec alphaCTD.
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{{ABSTRACT_PUBMED_10821859}}
==About this Structure==
==About this Structure==
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1DOQ is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Thermus_thermophilus Thermus thermophilus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1DOQ OCA].
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1DOQ is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Thermus_thermophilus Thermus thermophilus]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1DOQ OCA].
==Reference==
==Reference==
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[[Category: Thermus thermophilus]]
[[Category: Thermus thermophilus]]
[[Category: Transcription]]
[[Category: Transcription]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 14:05:38 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jun 30 23:23:20 2008''

Revision as of 20:23, 30 June 2008

Image:1doq.png

Template:STRUCTURE 1doq

THE C-TERMINAL DOMAIN OF THE RNA POLYMERASE ALPHA SUBUNIT FROM THERMUS THERMOPHILUS

Template:ABSTRACT PUBMED 10821859

About this Structure

1DOQ is a Single protein structure of sequence from Thermus thermophilus. Full experimental information is available from OCA.

Reference

The structure and the characteristic DNA binding property of the C-terminal domain of the RNA polymerase alpha subunit from Thermus thermophilus., Wada T, Yamazaki T, Kyogoku Y, J Biol Chem. 2000 May 26;275(21):16057-63. PMID:10821859

Page seeded by OCA on Mon Jun 30 23:23:20 2008

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