4qfv
From Proteopedia
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| - | '''Unreleased structure''' | ||
| - | + | ==Crystal structure of a unique ankyrin== | |
| + | <StructureSection load='4qfv' size='340' side='right'caption='[[4qfv]], [[Resolution|resolution]] 2.00Å' scene=''> | ||
| + | == Structural highlights == | ||
| + | <table><tr><td colspan='2'>[[4qfv]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Synthetic_construct Synthetic construct]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4QFV OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4QFV 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]] 1.999Å</td></tr> | ||
| + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ACT:ACETATE+ION'>ACT</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=4qfv FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4qfv OCA], [https://pdbe.org/4qfv PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4qfv RCSB], [https://www.ebi.ac.uk/pdbsum/4qfv PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4qfv ProSAT]</span></td></tr> | ||
| + | </table> | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | A highly diverse DNA library coding for ankyrin seven-repeat proteins (ANK-N5C) was designed and constructed by a PCR-based combinatorial assembly strategy. A bacterial melibiose fermentation assay was adapted for in vivo functional screen. We isolated a transcription blocker that completely inhibits the melibiose-dependent expression of alpha-galactosidase (MelA) and melibiose permease (MelB) of Escherichia coli by specifically preventing activation of the melAB operon. High-resolution crystal structural determination reveals that the designed ANK-N5C protein has a typical ankyrin fold, and the specific transcription blocker, ANK-N5C-281, forms a domain-swapped dimer. Functional tests suggest that the activity of MelR, a DNA-binding transcription activator and a member of AraC family of transcription factors, is inhibited by ANK-N5C-281 protein. All ANK-N5C proteins are expected to have a concave binding area with negative surface potential, suggesting that the designed ANK-N5C library proteins may facilitate the discovery of binders recognizing structural motifs with positive surface potential, like in DNA-binding proteins. Overall, our results show that the established library is a useful tool for the discovery of novel bioactive reagents. | ||
| - | + | A transcription blocker isolated from a designed repeat protein combinatorial library by in vivo functional screen.,Tikhonova EB, Ethayathulla AS, Su Y, Hariharan P, Xie S, Guan L Sci Rep. 2015 Jan 28;5:8070. doi: 10.1038/srep08070. PMID:25627011<ref>PMID:25627011</ref> | |
| - | + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |
| - | [[Category: | + | </div> |
| - | [[Category: Ethayathulla | + | <div class="pdbe-citations 4qfv" style="background-color:#fffaf0;"></div> |
| - | [[Category: Guan | + | == References == |
| - | [[Category: Tikhonova | + | <references/> |
| + | __TOC__ | ||
| + | </StructureSection> | ||
| + | [[Category: Large Structures]] | ||
| + | [[Category: Synthetic construct]] | ||
| + | [[Category: Ethayathulla AS]] | ||
| + | [[Category: Guan L]] | ||
| + | [[Category: Tikhonova EB]] | ||
Current revision
Crystal structure of a unique ankyrin
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