1qp9

<table><tr><td colspan='2'>[[1qp9]] is a 8 chain structure with sequence from [https://en.wikipedia.org/wiki/Atcc_18824 Atcc 18824]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1QP9 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1QP9 FirstGlance]. <br>

</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>

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== Publication Abstract from PubMed ==

HAP1 is a transcription factor in yeast whose DNA-binding domain has been implicated in directly affecting transcriptional activation. Two separate mutations in the DNA-binding domain, S63G (HAP1-PC7) and S63R (HAP1-18), retain wild-type binding affinity. However, HAP1-PC7 is transcriptionally silent while HAP1-18 shows highly elevated levels of transcription. We have determined the X-ray crystal structure of the DNA-binding domain of HAP1-PC7 bound to its DNA target, UAS(CYC7), and compared it to the previously solved HAP1-wt and HAP1-18 complexes to UAS(CYC7). Additionally, we have quantitatively compared the DNA-binding affinity and specificity of the HAP1-PC7, HAP1-18 and HAP1-wt DNA-binding domains. We show that, although the DNA-binding domains of these three proteins bind UAS(CYC7) with comparable affinity and specificity, the protein-DNA interactions are dramatically different between the three complexes. Conserved protein-DNA interactions are largely restricted to an internal DNA sequence that excludes one of the two conserved DNA half-sites of UAS(CYC7) suggesting a mode of recognition distinct from other HAP1 family members. Alternative protein-DNA interactions result in divergent DNA configurations between the three complexes. These results suggest that the differential transcriptional activities of the HAP1, HAP1-18 and HAP1-PC7 proteins are due, at least in part, to alternative protein-DNA contacts, and implies that HAP1-DNA interactions have direct allosteric effects on transcriptional activation.

Structure of HAP1-PC7 bound to DNA: implications for DNA recognition and allosteric effects of DNA-binding on transcriptional activation.,Lukens AK, King DA, Marmorstein R Nucleic Acids Res. 2000 Oct 15;28(20):3853-63. PMID:11024163<ref>PMID:11024163</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>

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<div class="pdbe-citations 1qp9" style="background-color:#fffaf0;"></div>

[[Category: Atcc 18824]]

[[Category: King, D]]

[[Category: Lukens, A]]

[[Category: Marmorstein, R]]

[[Category: Coiled-coil]]

[[Category: Zinc binuclear cluster]]