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1bbx

From Proteopedia

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[[Image:1bbx.jpg|left|200px]]
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{{Seed}}
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[[Image:1bbx.png|left|200px]]
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{{STRUCTURE_1bbx| PDB=1bbx | SCENE= }}
{{STRUCTURE_1bbx| PDB=1bbx | SCENE= }}
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'''NON-SPECIFIC PROTEIN-DNA INTERACTIONS IN THE SSO7D-DNA COMPLEX, NMR, 1 STRUCTURE'''
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===NON-SPECIFIC PROTEIN-DNA INTERACTIONS IN THE SSO7D-DNA COMPLEX, NMR, 1 STRUCTURE===
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==Overview==
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Many biochemical processes, including DNA packing, maintenance and control, rely on non-sequence specific protein-DNA interactions. Nonspecific DNA-binding proteins have evolved to tolerate a wide range of DNA sequences, yet bind with a respectable affinity. The nonspecific binding requirement is in contrast to that imposed on, for example, transcription factors and implies a different structural basis for the biomolecular recognition process. To address this issue, and the mechanism for archaeal DNA packing, we determined the structure of the Sso7d protein from Sulfolobus solfataricus in complex with DNA. Sso7d binds DNA by placing a triple-stranded beta-sheet across the DNA minor groove. The protein is anchored in this position by the insertion of hydrogen bond-donating side chains into the groove and additionally stabilized by electrostatic and non-polar interactions with the DNA backbone. This structure explains how strong binding can be achieved independent of DNA sequence. Sso7d binding also distorts the DNA conformation and introduces significant unwinding of the helix. This effect suggests a mechanism for DNA packing in Sulfolobus based on negative DNA supercoiling.
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The line below this paragraph, {{ABSTRACT_PUBMED_9665172}}, adds the Publication Abstract to the page
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(as it appears on PubMed at http://www.pubmed.gov), where 9665172 is the PubMed ID number.
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{{ABSTRACT_PUBMED_9665172}}
==About this Structure==
==About this Structure==
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1BBX is a [[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=1BBX OCA].
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1BBX is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Sulfolobus_solfataricus Sulfolobus solfataricus]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1BBX OCA].
==Reference==
==Reference==
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[[Category: Nonspecific protein-dna interaction]]
[[Category: Nonspecific protein-dna interaction]]
[[Category: Protein-dna interaction]]
[[Category: Protein-dna interaction]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 11:19:01 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jun 30 18:47:18 2008''

Revision as of 15:47, 30 June 2008

Image:1bbx.png

Template:STRUCTURE 1bbx

NON-SPECIFIC PROTEIN-DNA INTERACTIONS IN THE SSO7D-DNA COMPLEX, NMR, 1 STRUCTURE

Template:ABSTRACT PUBMED 9665172

About this Structure

1BBX is a Single protein structure of sequence from Sulfolobus solfataricus. Full experimental information is available from OCA.

Reference

Architecture of nonspecific protein-DNA interactions in the Sso7d-DNA complex., Agback P, Baumann H, Knapp S, Ladenstein R, Hard T, Nat Struct Biol. 1998 Jul;5(7):579-84. PMID:9665172

Page seeded by OCA on Mon Jun 30 18:47:18 2008

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