1azq
From Proteopedia
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'''HYPERTHERMOPHILE CHROMOSOMAL PROTEIN SAC7D BOUND WITH KINKED DNA DUPLEX''' | '''HYPERTHERMOPHILE CHROMOSOMAL PROTEIN SAC7D BOUND WITH KINKED DNA DUPLEX''' | ||
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[[Category: Shriver, J W.]] | [[Category: Shriver, J W.]] | ||
[[Category: Wang, A H.J.]] | [[Category: Wang, A H.J.]] | ||
| - | [[Category: | + | [[Category: Archea]] |
| - | [[Category: | + | [[Category: Dna-binding]] |
| - | + | [[Category: Intercalation]] | |
| - | [[Category: | + | [[Category: Kinked-dna]] |
| - | [[Category: | + | [[Category: Minor-groove binding]] |
| - | [[Category: | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 10:53:18 2008'' |
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| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | |
Revision as of 07:53, 2 May 2008
HYPERTHERMOPHILE CHROMOSOMAL PROTEIN SAC7D BOUND WITH KINKED DNA DUPLEX
Overview
The proteins Sac7d and Sso7d belong to a class of small chromosomal proteins from the hyperthermophilic archaeon Sulfolobus acidocaldarius and S. solfactaricus, respectively. These proteins are extremely stable to heat, acid and chemical agents. Sac7d binds to DNA without any particular sequence preference and thereby increases its melting temperature by approximately 40 degrees C. We have now solved and refined the crystal structure of Sac7d in complex with two DNA sequences to high resolution. The structures are examples of a nonspecific DNA-binding protein bound to DNA, and reveal that Sac7d binds in the minor groove, causing a sharp kinking of the DNA helix that is more marked than that induced by any sequence-specific DNA-binding proteins. The kink results from the intercalation of specific hydrophobic side chains of Sac7d into the DNA structure, but without causing any significant distortion of the protein structure relative to the uncomplexed protein in solution.
About this Structure
1AZQ is a Single protein structure of sequence from Sulfolobus acidocaldarius. Full crystallographic information is available from OCA.
Reference
The hyperthermophile chromosomal protein Sac7d sharply kinks DNA., Robinson H, Gao YG, McCrary BS, Edmondson SP, Shriver JW, Wang AH, Nature. 1998 Mar 12;392(6672):202-5. PMID:9515968 Page seeded by OCA on Fri May 2 10:53:18 2008
