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== | ==THE O. NOVA TELOMERE END BINDING PROTEIN COMPLEXED WITH SINGLE STRAND DNA== | ||
<StructureSection load='1otc' size='340' side='right'caption='[[1otc]], [[Resolution|resolution]] 2.80Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[1otc]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Sterkiella_nova Sterkiella nova]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1OTC OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1OTC FirstGlance]. <br> | |||
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.8Å</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=1otc FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1otc OCA], [https://pdbe.org/1otc PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1otc RCSB], [https://www.ebi.ac.uk/pdbsum/1otc PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1otc ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[https://www.uniprot.org/uniprot/TEBA_STENO TEBA_STENO] 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 == | |||
[[Image:Consurf_key_small.gif|200px|right]] | |||
Check<jmol> | |||
<jmolCheckbox> | |||
<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/ot/1otc_consurf.spt"</scriptWhenChecked> | |||
<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | |||
<text>to colour the structure by Evolutionary Conservation</text> | |||
</jmolCheckbox> | |||
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=1otc ConSurf]. | |||
<div style="clear:both"></div> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
Telomeres are specialized protein-DNA complexes that compose the ends of eukaryotic chromosomes. Telomeres protect chromosome termini from degradation and recombination and act together with telomerase to ensure complete genome replication. We have determined the crystal structure of the two-subunit Oxytricha nova telomere end binding protein (OnTEBP) complexed with single strand telomeric DNA at 2.8 A resolution. The structure reveals four oligonucleotide/oligosaccharide-binding folds, three of which form a deep cleft that binds the ssDNA, and a fourth that forms an unusual protein-protein interaction between the alpha and beta subunits. This structure provides a molecular description of how the two subunits of OnTEBP recognize and bind ssDNA to form a sequence-specific, telomeric nucleoprotein complex that caps the very 3' ends of chromosomes. | Telomeres are specialized protein-DNA complexes that compose the ends of eukaryotic chromosomes. Telomeres protect chromosome termini from degradation and recombination and act together with telomerase to ensure complete genome replication. We have determined the crystal structure of the two-subunit Oxytricha nova telomere end binding protein (OnTEBP) complexed with single strand telomeric DNA at 2.8 A resolution. The structure reveals four oligonucleotide/oligosaccharide-binding folds, three of which form a deep cleft that binds the ssDNA, and a fourth that forms an unusual protein-protein interaction between the alpha and beta subunits. This structure provides a molecular description of how the two subunits of OnTEBP recognize and bind ssDNA to form a sequence-specific, telomeric nucleoprotein complex that caps the very 3' ends of chromosomes. | ||
Crystal structure of the Oxytricha nova telomere end binding protein complexed with single strand DNA.,Horvath MP, Schweiker VL, Bevilacqua JM, Ruggles JA, Schultz SC Cell. 1998 Dec 23;95(7):963-74. PMID:9875850<ref>PMID:9875850</ref> | |||
== | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
</div> | |||
[[Category: | <div class="pdbe-citations 1otc" style="background-color:#fffaf0;"></div> | ||
==See Also== | |||
*[[End-binding protein|End-binding protein]] | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Large Structures]] | |||
[[Category: Sterkiella nova]] | [[Category: Sterkiella nova]] | ||
[[Category: Bevilacqua | [[Category: Bevilacqua JM]] | ||
[[Category: Horvath | [[Category: Horvath MP]] | ||
[[Category: Ruggles | [[Category: Ruggles JA]] | ||
[[Category: Schultz | [[Category: Schultz SC]] | ||
[[Category: Schweiker | [[Category: Schweiker VL]] | ||