3or7
From Proteopedia
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| - | [[Image:3or7.png|left|200px]] | ||
| - | + | ==On the structural basis of modal gating behavior in K+channels - E71I== | |
| + | <StructureSection load='3or7' size='340' side='right'caption='[[3or7]], [[Resolution|resolution]] 2.30Å' scene=''> | ||
| + | == Structural highlights == | ||
| + | <table><tr><td colspan='2'>[[3or7]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Mus_musculus Mus musculus] and [https://en.wikipedia.org/wiki/Streptomyces_lividans Streptomyces lividans]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3OR7 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3OR7 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]] 2.3Å</td></tr> | ||
| + | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=K:POTASSIUM+ION'>K</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=3or7 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3or7 OCA], [https://pdbe.org/3or7 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3or7 RCSB], [https://www.ebi.ac.uk/pdbsum/3or7 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3or7 ProSAT]</span></td></tr> | ||
| + | </table> | ||
| + | == Function == | ||
| + | [https://www.uniprot.org/uniprot/KCSA_STRLI KCSA_STRLI] Acts as a pH-gated potassium ion channel; changing the cytosolic pH from 7 to 4 opens the channel, although it is not clear if this is the physiological stimulus for channel opening. Monovalent cation preference is K(+) > Rb(+) > NH4(+) >> Na(+) > Li(+).<ref>PMID:7489706</ref> | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | Modal-gating shifts represent an effective regulatory mechanism by which ion channels control the extent and time course of ionic fluxes. Under steady-state conditions, the K(+) channel KcsA shows three distinct gating modes, high-P(o), low-P(o) and a high-frequency flicker mode, each with about an order of magnitude difference in their mean open times. Here we show that in the absence of C-type inactivation, mutations at the pore-helix position Glu71 unmask a series of kinetically distinct modes of gating in a side chain-specific way. These gating modes mirror those seen in wild-type channels and suggest that specific interactions in the side chain network surrounding the selectivity filter, in concert with ion occupancy, alter the relative stability of pre-existing conformational states of the pore. The present results highlight the key role of the selectivity filter in regulating modal gating behavior in K(+) channels. | ||
| - | + | On the structural basis of modal gating behavior in K(+) channels.,Chakrapani S, Cordero-Morales JF, Jogini V, Pan AC, Cortes DM, Roux B, Perozo E Nat Struct Mol Biol. 2011 Jan;18(1):67-74. Epub 2010 Dec 26. PMID:21186363<ref>PMID:21186363</ref> | |
| - | + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |
| - | + | </div> | |
| - | + | <div class="pdbe-citations 3or7" style="background-color:#fffaf0;"></div> | |
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==See Also== | ==See Also== | ||
| - | *[[Antibody|Antibody]] | + | *[[Antibody 3D structures|Antibody 3D structures]] |
| - | *[[Potassium | + | *[[Potassium channel 3D structures|Potassium channel 3D structures]] |
| - | + | *[[3D structures of non-human antibody|3D structures of non-human antibody]] | |
| - | == | + | == References == |
| - | < | + | <references/> |
| + | __TOC__ | ||
| + | </StructureSection> | ||
| + | [[Category: Large Structures]] | ||
[[Category: Mus musculus]] | [[Category: Mus musculus]] | ||
[[Category: Streptomyces lividans]] | [[Category: Streptomyces lividans]] | ||
| - | [[Category: Chakrapani | + | [[Category: Chakrapani S]] |
| - | [[Category: Cordero-Morales | + | [[Category: Cordero-Morales JF]] |
| - | [[Category: Cortes | + | [[Category: Cortes DM]] |
| - | [[Category: Jogini | + | [[Category: Jogini V]] |
| - | [[Category: Pan | + | [[Category: Pan AC]] |
| - | [[Category: Perozo | + | [[Category: Perozo E]] |
| - | [[Category: Roux | + | [[Category: Roux B]] |
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Current revision
On the structural basis of modal gating behavior in K+channels - E71I
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