1ph7: Difference between revisions
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==CRYSTAL STRUCTURE OF THE OXYTRICHA NOVA TELOMERE END-BINDING PROTEIN COMPLEXED WITH NONCOGNATE SSDNA GGGGTTTTGIGG== | ==CRYSTAL STRUCTURE OF THE OXYTRICHA NOVA TELOMERE END-BINDING PROTEIN COMPLEXED WITH NONCOGNATE SSDNA GGGGTTTTGIGG== | ||
<StructureSection load='1ph7' size='340' side='right' caption='[[1ph7]], [[Resolution|resolution]] 2.90Å' scene=''> | <StructureSection load='1ph7' size='340' side='right'caption='[[1ph7]], [[Resolution|resolution]] 2.90Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[1ph7]] is a 5 chain structure with sequence from [http://en.wikipedia.org/wiki/Ciliate Ciliate]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1PH7 OCA]. For a <b>guided tour on the structure components</b> use [http:// | <table><tr><td colspan='2'>[[1ph7]] is a 5 chain structure with sequence from [http://en.wikipedia.org/wiki/Ciliate Ciliate]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1PH7 OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=1PH7 FirstGlance]. <br> | ||
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene></td></tr> | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene></td></tr> | ||
<tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=DI:2-DEOXYINOSINE-5-MONOPHOSPHATE'>DI</scene></td></tr> | <tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=DI:2-DEOXYINOSINE-5-MONOPHOSPHATE'>DI</scene></td></tr> | ||
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1otc|1otc]], [[1jb7|1jb7]], [[1kix|1kix]], [[1k8g|1k8g]], [[1pa6|1pa6]], [[1ph1|1ph1]], [[1ph2|1ph2]], [[1ph3|1ph3]], [[1ph4|1ph4]], [[1ph5|1ph5]], [[1ph6|1ph6]], [[1ph8|1ph8]], [[1ph9|1ph9]], [[1phj|1phj]]</td></tr> | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[1otc|1otc]], [[1jb7|1jb7]], [[1kix|1kix]], [[1k8g|1k8g]], [[1pa6|1pa6]], [[1ph1|1ph1]], [[1ph2|1ph2]], [[1ph3|1ph3]], [[1ph4|1ph4]], [[1ph5|1ph5]], [[1ph6|1ph6]], [[1ph8|1ph8]], [[1ph9|1ph9]], [[1phj|1phj]]</div></td></tr> | ||
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">MAC-56A AND MAC-56K AND MAC-56S ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=200597 Ciliate]), MAC-41A AND MAC-41S ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=200597 Ciliate])</td></tr> | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">MAC-56A AND MAC-56K AND MAC-56S ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=200597 Ciliate]), MAC-41A AND MAC-41S ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=200597 Ciliate])</td></tr> | ||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http:// | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=1ph7 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ph7 OCA], [http://pdbe.org/1ph7 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1ph7 RCSB], [http://www.ebi.ac.uk/pdbsum/1ph7 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1ph7 ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Function == | == Function == | ||
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</StructureSection> | </StructureSection> | ||
[[Category: Ciliate]] | [[Category: Ciliate]] | ||
[[Category: Large Structures]] | |||
[[Category: Schultz, S C]] | [[Category: Schultz, S C]] | ||
[[Category: Theobald, D L]] | [[Category: Theobald, D L]] | ||
Revision as of 10:29, 9 December 2020
CRYSTAL STRUCTURE OF THE OXYTRICHA NOVA TELOMERE END-BINDING PROTEIN COMPLEXED WITH NONCOGNATE SSDNA GGGGTTTTGIGGCRYSTAL STRUCTURE OF THE OXYTRICHA NOVA TELOMERE END-BINDING PROTEIN COMPLEXED WITH NONCOGNATE SSDNA GGGGTTTTGIGG
Structural highlights
Function[TEBB_OXYNO] May function as protective capping of the single-stranded telomeric overhang. May also participate in telomere length regulation during DNA replication. Binds specifically to the T4G4-containing extension on the 3'strand and protects this region of the telomere from nuclease digestion and chemical modification. [TEBA_OXYNO] May function as protective capping of the single-stranded telomeric overhang. May also participate in telomere length regulation during DNA replication. Binds specifically to the T4G4-containing extension on the 3'strand and protects this region of the telomere from nuclease digestion and chemical modification. Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedSequence-specific protein recognition of single-stranded nucleic acids is critical for many fundamental cellular processes, such as DNA replication, DNA repair, transcription, translation, recombination, apoptosis and telomere maintenance. To explore the mechanisms of sequence-specific ssDNA recognition, we determined the crystal structures of 10 different non-cognate ssDNAs complexed with the Oxytricha nova telomere end-binding protein (OnTEBP) and evaluated their corresponding binding affinities (PDB ID codes 1PH1-1PH9 and 1PHJ). The thermodynamic and structural effects of these sequence perturbations could not have been predicted based solely upon the cognate structure. OnTEBP accommodates non-cognate nucleotides by both subtle adjustments and surprisingly large structural rearrangements in the ssDNA. In two complexes containing ssDNA intermediates that occur during telomere extension by telomerase, entire nucleotides are expelled from the complex. Concurrently, the sequence register of the ssDNA shifts to re-establish a more cognate-like pattern. This phenomenon, termed nucleotide shuffling, may be of general importance in protein recognition of single-stranded nucleic acids. This set of structural and thermodynamic data highlights a fundamental difference between protein recognition of ssDNA versus dsDNA. Nucleotide shuffling and ssDNA recognition in Oxytricha nova telomere end-binding protein complexes.,Theobald DL, Schultz SC EMBO J. 2003 Aug 15;22(16):4314-24. PMID:12912928[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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