This old version of Proteopedia is provided for student assignments while the new version is undergoing repairs. Content and edits done in this old version of Proteopedia after March 1, 2026 will eventually be lost when it is retired in about June of 2026.
Apply for new accounts at the new Proteopedia. Your logins will work in both the old and new versions.
6ytq
From Proteopedia
(Difference between revisions)
m (Protected "6ytq" [edit=sysop:move=sysop]) |
|||
| (One intermediate revision not shown.) | |||
| Line 1: | Line 1: | ||
| - | '''Unreleased structure''' | ||
| - | + | ==Cryo-EM structure of a dimer of undecameric human CALHM4 in the presence of Ca2+== | |
| + | <StructureSection load='6ytq' size='340' side='right'caption='[[6ytq]], [[Resolution|resolution]] 4.02Å' scene=''> | ||
| + | == Structural highlights == | ||
| + | <table><tr><td colspan='2'>[[6ytq]] is a 22 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6YTQ OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=6YTQ FirstGlance]. <br> | ||
| + | </td></tr><tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=6ytq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6ytq OCA], [http://pdbe.org/6ytq PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6ytq RCSB], [http://www.ebi.ac.uk/pdbsum/6ytq PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6ytq ProSAT]</span></td></tr> | ||
| + | </table> | ||
| + | == Function == | ||
| + | [[http://www.uniprot.org/uniprot/CAHM4_HUMAN CAHM4_HUMAN]] Pore-forming subunit of a voltage-gated ion channel.[UniProtKB:Q8IU99] | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | The transport of substances across the placenta is essential for the development of the fetus. Here, we were interested in the role of channels of the calcium homeostasis modulator (CALHM) family in the human placenta. By transcript analysis, we found the paralogs CALHM2, 4, and 6 to be highly expressed in this organ and upregulated during trophoblast differentiation. Based on electrophysiology, we found that activation of these paralogs differs from the voltage- and calcium-gated channel CALHM1. Cryo-EM structures of CALHM4 display decameric and undecameric assemblies with large cylindrical pore, while in CALHM6 a conformational change has converted the pore shape into a conus that narrows at the intracellular side, thus describing distinct functional states of the channel. The pore geometry alters the distribution of lipids, which occupy the cylindrical pore of CALHM4 in a bilayer-like arrangement whereas they have redistributed in the conical pore of CALHM6 with potential functional consequences. | ||
| - | + | Cryo-EM structures and functional properties of CALHM channels of the human placenta.,Drozdzyk K, Sawicka M, Bahamonde-Santos MI, Jonas Z, Deneka D, Albrecht C, Dutzler R Elife. 2020 May 6;9. pii: 55853. doi: 10.7554/eLife.55853. PMID:32374262<ref>PMID:32374262</ref> | |
| - | + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |
| - | [[Category: | + | </div> |
| + | <div class="pdbe-citations 6ytq" style="background-color:#fffaf0;"></div> | ||
| + | == References == | ||
| + | <references/> | ||
| + | __TOC__ | ||
| + | </StructureSection> | ||
| + | [[Category: Large Structures]] | ||
[[Category: Drozdzyk, K]] | [[Category: Drozdzyk, K]] | ||
| - | [[Category: Sawicka, M]] | ||
[[Category: Dutzler, R]] | [[Category: Dutzler, R]] | ||
| + | [[Category: Sawicka, M]] | ||
| + | [[Category: Calcium homeostasis modulator]] | ||
| + | [[Category: Ion channel]] | ||
| + | [[Category: Membrane protein]] | ||
| + | [[Category: Placenta]] | ||
Current revision
Cryo-EM structure of a dimer of undecameric human CALHM4 in the presence of Ca2+
| |||||||||||
