View source for 3wmg


==Crystal structure of an inward-facing eukaryotic ABC multidrug transporter G277V/A278V/A279V mutant in complex with an cyclic peptide inhibitor, aCAP==
<StructureSection load='3wmg' size='340' side='right'caption='[[3wmg]], [[Resolution|resolution]] 2.40&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[3wmg]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Cyanidioschyzon_merolae Cyanidioschyzon merolae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3WMG OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3WMG 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]] 2.4&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=ACE:ACETYL+GROUP'>ACE</scene>, <scene name='pdbligand=DMU:DECYL-BETA-D-MALTOPYRANOSIDE'>DMU</scene>, <scene name='pdbligand=DTR:D-TRYPTOPHAN'>DTR</scene>, <scene name='pdbligand=TRS:2-AMINO-2-HYDROXYMETHYL-PROPANE-1,3-DIOL'>TRS</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=3wmg FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3wmg OCA], [https://pdbe.org/3wmg PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3wmg RCSB], [https://www.ebi.ac.uk/pdbsum/3wmg PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3wmg ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/M1VAN7_CYAM1 M1VAN7_CYAM1] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
P-glycoprotein is an ATP-binding cassette multidrug transporter that actively transports chemically diverse substrates across the lipid bilayer. The precise molecular mechanism underlying transport is not fully understood. Here, we present crystal structures of a eukaryotic P-glycoprotein homolog, CmABCB1 from Cyanidioschyzon merolae, in two forms: unbound at 2.6-A resolution and bound to a unique allosteric inhibitor at 2.4-A resolution. The inhibitor clamps the transmembrane helices from the outside, fixing the CmABCB1 structure in an inward-open conformation similar to the unbound structure, confirming that an outward-opening motion is required for ATP hydrolysis cycle. These structures, along with site-directed mutagenesis and transporter activity measurements, reveal the detailed architecture of the transporter, including a gate that opens to extracellular side and two gates that open to intramembranous region and the cytosolic side. We propose that the motion of the nucleotide-binding domain drives those gating apparatuses via two short intracellular helices, IH1 and IH2, and two transmembrane helices, TM2 and TM5.

Structural basis for gating mechanisms of a eukaryotic P-glycoprotein homolog.,Kodan A, Yamaguchi T, Nakatsu T, Sakiyama K, Hipolito CJ, Fujioka A, Hirokane R, Ikeguchi K, Watanabe B, Hiratake J, Kimura Y, Suga H, Ueda K, Kato H Proc Natl Acad Sci U S A. 2014 Mar 3. PMID:24591620<ref>PMID:24591620</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 3wmg" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Cyanidioschyzon merolae]]
[[Category: Large Structures]]
[[Category: Fujioka A]]
[[Category: Hipolito CJ]]
[[Category: Hirokane R]]
[[Category: Hirtake J]]
[[Category: Ikeguchi K]]
[[Category: Kato H]]
[[Category: Kimura Y]]
[[Category: Kodan A]]
[[Category: Nakatsu T]]
[[Category: Sakiyama K]]
[[Category: Suga H]]
[[Category: Ueda K]]
[[Category: Watanabe B]]
[[Category: Yamaguchi T]]