1ca6
From Proteopedia
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'''INTERCALATION SITE OF HYPERTHERMOPHILE CHROMOSOMAL PROTEIN SSO7D/SAC7D BOUND TO DNA''' | '''INTERCALATION SITE OF HYPERTHERMOPHILE CHROMOSOMAL PROTEIN SSO7D/SAC7D BOUND TO DNA''' | ||
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[[Category: Su, S.]] | [[Category: Su, S.]] | ||
[[Category: Wang, A H.J.]] | [[Category: Wang, A H.J.]] | ||
| - | [[Category: | + | [[Category: Chromosomal protein]] |
| - | [[Category: | + | [[Category: Dna binding]] |
| - | [[Category: | + | [[Category: Hyperthermophile]] |
| - | [[Category: | + | [[Category: Sac7d]] |
| - | [[Category: | + | [[Category: Sso7d]] |
| - | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 12:31:04 2008'' | |
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | |
Revision as of 09:31, 2 May 2008
INTERCALATION SITE OF HYPERTHERMOPHILE CHROMOSOMAL PROTEIN SSO7D/SAC7D BOUND TO DNA
Overview
Sso7d and Sac7d are two small chromatin proteins from the hyperthermophilic archaeabacterium Sulfolobus solfataricus and Sulfolobus acidocaldarius, respectively. The crystal structures of Sso7d-GTGATCGC, Sac7d-GTGATCGC and Sac7d-GTGATCAC have been determined and refined at 1.45 A, 2.2 A and 2.2 A, respectively, to investigate the DNA binding property of Sso7d/Sac7d in the presence of a T-G mismatch base-pair. Detailed structural analysis revealed that the intercalation site includes the T-G mismatch base-pair and Sso7d/Sac7d bind to that mismatch base-pair in a manner similar to regular DNA. In the Sso7d-GTGATCGC complex, a new inter-strand hydrogen bond between T2O4 and C14N4 is formed and well-order bridging water molecules are found. The results suggest that the less stable DNA stacking site involving a T-G mismatch may be a preferred site for protein side-chain intercalation.
About this Structure
1CA6 is a Single protein structure of sequence from Sulfolobus acidocaldarius. Full crystallographic information is available from OCA.
Reference
Crystal structures of the chromosomal proteins Sso7d/Sac7d bound to DNA containing T-G mismatched base-pairs., Su S, Gao YG, Robinson H, Liaw YC, Edmondson SP, Shriver JW, Wang AH, J Mol Biol. 2000 Oct 27;303(3):395-403. PMID:11031116 Page seeded by OCA on Fri May 2 12:31:04 2008
