1a1g: Difference between revisions
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==DSNR (ZIF268 VARIANT) ZINC FINGER-DNA COMPLEX (GCGT SITE)== | ==DSNR (ZIF268 VARIANT) ZINC FINGER-DNA COMPLEX (GCGT SITE)== | ||
<StructureSection load='1a1g' size='340' side='right' caption='[[1a1g]], [[Resolution|resolution]] 1.90Å' scene=''> | <StructureSection load='1a1g' size='340' side='right' caption='[[1a1g]], [[Resolution|resolution]] 1.90Å' scene=''> | ||
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<table><tr><td colspan='2'>[[1a1g]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/Lk3_transgenic_mice Lk3 transgenic mice]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1A1G OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1A1G FirstGlance]. <br> | <table><tr><td colspan='2'>[[1a1g]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/Lk3_transgenic_mice Lk3 transgenic mice]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1A1G OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1A1G FirstGlance]. <br> | ||
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr> | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr> | ||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1a1g FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1a1g OCA], [http://pdbe.org/1a1g PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1a1g RCSB], [http://www.ebi.ac.uk/pdbsum/1a1g PDBsum]</span></td></tr> | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1a1g FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1a1g OCA], [http://pdbe.org/1a1g PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1a1g RCSB], [http://www.ebi.ac.uk/pdbsum/1a1g PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1a1g ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Function == | == Function == | ||
Revision as of 13:34, 15 November 2017
DSNR (ZIF268 VARIANT) ZINC FINGER-DNA COMPLEX (GCGT SITE)DSNR (ZIF268 VARIANT) ZINC FINGER-DNA COMPLEX (GCGT SITE)
Structural highlights
Function[EGR1_MOUSE] Transcriptional regulator. Recognizes and binds to the DNA sequence 5'-CGCCCCCGC-3'(EGR-site). Activates the transcription of target genes whose products are required for mitogenesis and differentiation. 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 PubMedBACKGROUND: Zinc fingers of the Cys2-His2 class comprise one of the largest families of eukaryotic DNA-binding motifs and recognize a diverse set of DNA sequences. These proteins have a relatively simple modular structure and key base contacts are typically made by a few residues from each finger. These features make the zinc finger motif an attractive system for designing novel DNA-binding proteins and for exploring fundamental principles of protein-DNA recognition. RESULTS: Here we report the X-ray crystal structures of zinc finger-DNA complexes involving three variants of Zif268, with multiple changes in the recognition helix of finger one. We describe the structure of each of these three-finger peptides bound to its corresponding target site. To help elucidate the differential basis for site-specific recognition, the structures of four other complexes containing various combinations of these peptides with alternative binding sites have also been determined. CONCLUSIONS: The protein-DNA contacts observed in these complexes reveal the basis for the specificity demonstrated by these Zif268 variants. Many, but not all, of the contacts can be rationalized in terms of a recognition code, but the predictive value of such a code is limited. The structures illustrate how modest changes in the docking arrangement accommodate the new sidechain-base and sidechain-phosphate interactions. Such adaptations help explain the versatility of naturally occurring zinc finger proteins and their utility in design. High-resolution structures of variant Zif268-DNA complexes: implications for understanding zinc finger-DNA recognition.,Elrod-Erickson M, Benson TE, Pabo CO Structure. 1998 Apr 15;6(4):451-64. PMID:9562555[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References |
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