4nty: Difference between revisions
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==Cesium sites in the crystal structure of acid-sensing ion channel in complex with snake toxin== | ==Cesium sites in the crystal structure of acid-sensing ion channel in complex with snake toxin== | ||
<StructureSection load='4nty' size='340' side='right' caption='[[4nty]], [[Resolution|resolution]] 2.65Å' scene=''> | <StructureSection load='4nty' size='340' side='right'caption='[[4nty]], [[Resolution|resolution]] 2.65Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[4nty]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/Chick Chick] and [http://en.wikipedia.org/wiki/Mictn Mictn]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4NTY OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4NTY FirstGlance]. <br> | <table><tr><td colspan='2'>[[4nty]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/Chick Chick] and [http://en.wikipedia.org/wiki/Mictn Mictn]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4NTY OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4NTY FirstGlance]. <br> | ||
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==See Also== | ==See Also== | ||
*[[Ion channels|Ion channels]] | *[[Ion channels 3D structures|Ion channels 3D structures]] | ||
== References == | == References == | ||
<references/> | <references/> | ||
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</StructureSection> | </StructureSection> | ||
[[Category: Chick]] | [[Category: Chick]] | ||
[[Category: Large Structures]] | |||
[[Category: Mictn]] | [[Category: Mictn]] | ||
[[Category: Baconguis, I]] | [[Category: Baconguis, I]] | ||
Revision as of 13:06, 25 December 2019
Cesium sites in the crystal structure of acid-sensing ion channel in complex with snake toxinCesium sites in the crystal structure of acid-sensing ion channel in complex with snake toxin
Structural highlights
Function[ASIC1_CHICK] Cation channel with high affinity for sodium, which is gated by extracellular protons and inhibited by the diuretic amiloride (By similarity).[1] Publication Abstract from PubMedAcid-sensing ion channels (ASICs) detect extracellular protons produced during inflammation or ischemic injury and belong to the superfamily of degenerin/epithelial sodium channels. Here, we determine the cocrystal structure of chicken ASIC1a with MitTx, a pain-inducing toxin from the Texas coral snake, to define the structure of the open state of ASIC1a. In the MitTx-bound open state and in the previously determined low-pH desensitized state, TM2 is a discontinuous alpha helix in which the Gly-Ala-Ser selectivity filter adopts an extended, belt-like conformation, swapping the cytoplasmic one-third of TM2 with an adjacent subunit. Gly 443 residues of the selectivity filter provide a ring of three carbonyl oxygen atoms with a radius of approximately 3.6 A, presenting an energetic barrier for hydrated ions. The ASIC1a-MitTx complex illuminates the mechanism of MitTx action, defines the structure of the selectivity filter of voltage-independent, sodium-selective ion channels, and captures the open state of an ASIC. X-ray structure of Acid-sensing ion channel 1-snake toxin complex reveals open state of a na(+)-selective channel.,Baconguis I, Bohlen CJ, Goehring A, Julius D, Gouaux E Cell. 2014 Feb 13;156(4):717-29. doi: 10.1016/j.cell.2014.01.011. Epub 2014 Feb, 6. PMID:24507937[2] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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