View source for 4e0p


==Protelomerase tela covalently complexed with substrate DNA==
<StructureSection load='4e0p' size='340' side='right'caption='[[4e0p]], [[Resolution|resolution]] 2.20&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[4e0p]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Agrobacterium_fabrum_str._C58 Agrobacterium fabrum str. C58]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4E0P OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4E0P 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]] 2.2&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene>, <scene name='pdbligand=PTR:O-PHOSPHOTYROSINE'>PTR</scene></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=4e0p FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4e0p OCA], [https://pdbe.org/4e0p PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4e0p RCSB], [https://www.ebi.ac.uk/pdbsum/4e0p PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4e0p ProSAT]</span></td></tr>
</table>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Hairpin telomeres of bacterial linear chromosomes are generated by a DNA cutting-rejoining enzyme protelomerase. Protelomerase resolves a concatenated dimer of chromosomes as the last step of chromosome replication, converting a palindromic DNA sequence at the junctions between chromosomes into covalently closed hairpins. The mechanism by which protelomerase transforms a duplex DNA substrate into the hairpin telomeres remains largely unknown. We report here a series of crystal structures of the protelomerase TelA bound to DNA that represent distinct stages along the reaction pathway. The structures suggest that TelA converts a linear duplex substrate into hairpin turns via a transient strand-refolding intermediate that involves DNA-base flipping and wobble base-pairs. The extremely compact di-nucleotide hairpin structure of the product is fully stabilized by TelA prior to strand ligation, which drives the reaction to completion. The enzyme-catalyzed, multistep strand refolding is a novel mechanism in DNA rearrangement reactions.

An enzyme-catalyzed multistep DNA refolding mechanism in hairpin telomere formation.,Shi K, Huang WM, Aihara H PLoS Biol. 2013 Jan;11(1):e1001472. doi: 10.1371/journal.pbio.1001472. Epub 2013 , Jan 29. PMID:23382649<ref>PMID:23382649</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 4e0p" style="background-color:#fffaf0;"></div>
== References ==
<references/>
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</StructureSection>
[[Category: Agrobacterium fabrum str. C58]]
[[Category: Large Structures]]
[[Category: Aihara H]]
[[Category: Shi K]]