View source for 7cqv


==Complex of TRP_CBS1 and Calmodulin_Nlobe==
<StructureSection load='7cqv' size='340' side='right'caption='[[7cqv]], [[Resolution|resolution]] 1.78&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[7cqv]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Drosophila_melanogaster Drosophila melanogaster]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7CQV OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7CQV 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]] 1.78&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</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=7cqv FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7cqv OCA], [https://pdbe.org/7cqv PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7cqv RCSB], [https://www.ebi.ac.uk/pdbsum/7cqv PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7cqv ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/C6SUZ2_DROME C6SUZ2_DROME] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Drosophila TRP is a calcium-permeable cation channel essential for fly visual signal transduction. During phototransduction, Ca(2+) mediates both positive and negative feedback regulation on TRP channel activity, possibly via binding to calmodulin (CaM). However, the molecular mechanism underlying Ca(2+) modulated CaM/TRP interaction is poorly understood. Here, we discover an unexpected, Ca(2+)-dependent binding mode between CaM and TRP. The TRP tail contains two CaM binding sites (CBS1 and CBS2) separated by an approximately 70-residue linker. CBS1 binds to the CaM N-lobe and CBS2 recognizes the CaM C-lobe. Structural studies reveal the lobe-specific binding of CaM to CBS1&amp;2. Mutations introduced in both CBS1 and CBS2 eliminated CaM binding in full-length TRP, but surprisingly had no effect on the response to light under physiological conditions, suggesting alternative mechanisms governing Ca(2+)-mediated feedback on the channel activity. Finally, we discover that TRPC4, the closest mammalian paralog of Drosophila TRP, adopts a similar CaM binding mode.

Calmodulin binds to Drosophila TRP with an unexpected mode.,Chen W, Shen Z, Asteriti S, Chen Z, Ye F, Sun Z, Wan J, Montell C, Hardie RC, Liu W, Zhang M Structure. 2021 Apr 1;29(4):330-344.e4. doi: 10.1016/j.str.2020.11.016. Epub 2020 , Dec 15. PMID:33326749<ref>PMID:33326749</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 7cqv" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Drosophila melanogaster]]
[[Category: Large Structures]]
[[Category: Shen ZS]]