1ca5: Difference between revisions
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== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[1ca5]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Sulfolobus_acidocaldarius Sulfolobus acidocaldarius] and [https://en.wikipedia.org/wiki/Synthetic_construct Synthetic construct]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1CA5 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1CA5 FirstGlance]. <br> | <table><tr><td colspan='2'>[[1ca5]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Sulfolobus_acidocaldarius Sulfolobus acidocaldarius] and [https://en.wikipedia.org/wiki/Synthetic_construct Synthetic construct]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1CA5 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1CA5 FirstGlance]. <br> | ||
</td></tr><tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1ca5 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ca5 OCA], [https://pdbe.org/1ca5 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1ca5 RCSB], [https://www.ebi.ac.uk/pdbsum/1ca5 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1ca5 ProSAT]</span></td></tr> | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.2Å</td></tr> | ||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1ca5 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ca5 OCA], [https://pdbe.org/1ca5 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1ca5 RCSB], [https://www.ebi.ac.uk/pdbsum/1ca5 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1ca5 ProSAT]</span></td></tr> | |||
</table> | </table> | ||
== Function == | == Function == | ||
Latest revision as of 08:49, 9 August 2023
INTERCALATION SITE OF HYPERTHERMOPHILE CHROMOSOMAL PROTEIN SSO7D/SAC7D BOUND TO DNAINTERCALATION SITE OF HYPERTHERMOPHILE CHROMOSOMAL PROTEIN SSO7D/SAC7D BOUND TO DNA
Structural highlights
FunctionDN7D_SULAC Can constrain negative DNA supercoils. May be involved in maintaining the integrity of the genome at high temperature.[UniProtKB:P61990] Publication Abstract from PubMedSso7d 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. 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[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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