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Sandbox Reserved 1051
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(Difference between revisions)
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{{Sandbox_Reserved_Butler_CH462_Sp2015_#}}<!-- PLEASE ADD YOUR CONTENT BELOW HERE --> | {{Sandbox_Reserved_Butler_CH462_Sp2015_#}}<!-- PLEASE ADD YOUR CONTENT BELOW HERE --> | ||
| - | == | + | ==CzrA== |
| - | <StructureSection load='2KJB' size='340' side='right' caption='The dimer | + | <StructureSection load='2KJB' size='340' side='right' caption='The dimer CzrA' scene=''> |
This is a default text for your page ''''''. Click above on '''edit this page''' to modify. Be careful with the < and > signs. | This is a default text for your page ''''''. Click above on '''edit this page''' to modify. Be careful with the < and > signs. | ||
You may include any references to papers as in: the use of JSmol in Proteopedia <ref>DOI 10.1002/ijch.201300024</ref> or to the article describing Jmol <ref>PMID:21638687</ref> to the rescue. | You may include any references to papers as in: the use of JSmol in Proteopedia <ref>DOI 10.1002/ijch.201300024</ref> or to the article describing Jmol <ref>PMID:21638687</ref> to the rescue. | ||
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The <scene name='69/694219/Serandhisresidues/1'>main DNA binding residues</scene> have been found to be the SER 54 and 57 along with HIS 58. | The <scene name='69/694219/Serandhisresidues/1'>main DNA binding residues</scene> have been found to be the SER 54 and 57 along with HIS 58. | ||
== Zinc Binding == | == Zinc Binding == | ||
| - | Zinc is an allosteric inhibitor to | + | Zinc is an allosteric inhibitor to CzrA. Two zinc ions may bind to the dimer, at the location of the <scene name='69/694218/Alpha_5_helices/2'> alpha 5 </scene> helix from each monomer. As zinc binds, the alpha 5 helices <scene name='69/694218/2kjc_zinc_bound/1'>swing down</scene> to inhibit the DNA binding residues. As CzrA is a transcriptional repressor, binding of zinc to the dimer will activate the czr operon. Furthermore, CzrA must be in its dimer form for zinc to bind. The <scene name='69/694218/Spacefill_with_zinc_pockets/1'>zinc binding pocket</scene> is formed by two residues from each monomer, so zinc cannot bind to the monomer. The <scene name='69/694218/Zinc_residues/1'>zinc binding site</scene> is formed by Asp84 and His86 from one monomer, and His97 and His100 from the other monomer. |
| - | + | ||
== References == | == References == | ||
<references/> | <references/> | ||
Revision as of 13:11, 14 March 2017
| This Sandbox is Reserved from 02/09/2015, through 05/31/2016 for use in the course "CH462: Biochemistry 2" taught by Geoffrey C. Hoops at the Butler University. This reservation includes Sandbox Reserved 1051 through Sandbox Reserved 1080. |
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CzrA
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