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5e1j

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Revision as of 09:53, 22 November 2017

Structure of voltage-gated two-pore channel TPC1 from Arabidopsis thaliana

Structural highlights

5e1j is a 1 chain structure with sequence from Arath. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	,
Gene:	TPC1, CCH1, FOU2, At4g03560, F9H3.19, T5L23.5 (ARATH)
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[TPC1_ARATH] Functions as a voltage-gated inward-rectifying Ca(2+) channel (VDCC) across the vacuole membrane. Is one of the essential components of the slow vacuolar (SV) channel. Acts as the major ROS-responsive Ca(2+) channel and is the possible target of Al-dependent inhibition. Involved in the regulation of germination and stomatal movement.^[1] ^[2]

Publication Abstract from PubMed

Two-pore channels (TPCs) contain two copies of a Shaker-like six-transmembrane (6-TM) domain in each subunit and are ubiquitously expressed in both animals and plants as organellar cation channels. Here we present the crystal structure of a vacuolar two-pore channel from Arabidopsis thaliana, AtTPC1, which functions as a homodimer. AtTPC1 activation requires both voltage and cytosolic Ca2+. Ca2+ binding to the cytosolic EF-hand domain triggers conformational changes coupled to the pair of pore-lining inner helices from the first 6-TM domains, whereas membrane potential only activates the second voltage-sensing domain, the conformational changes of which are coupled to the pair of inner helices from the second 6-TM domains. Luminal Ca2+ or Ba2+ can modulate voltage activation by stabilizing the second voltage-sensing domain in the resting state and shift voltage activation towards more positive potentials. Our Ba2+-bound AtTPC1 structure reveals a voltage sensor in the resting state, providing hitherto unseen structural insight into the general voltage-gating mechanism among voltage-gated channels.

Structure of the voltage-gated two-pore channel TPC1 from Arabidopsis thaliana.,Guo J, Zeng W, Chen Q, Lee C, Chen L, Yang Y, Cang C, Ren D, Jiang Y Nature. 2015 Dec 21. doi: 10.1038/nature16446. PMID:26689363^[3]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Kawano T, Kadono T, Fumoto K, Lapeyrie F, Kuse M, Isobe M, Furuichi T, Muto S. Aluminum as a specific inhibitor of plant TPC1 Ca2+ channels. Biochem Biophys Res Commun. 2004 Nov 5;324(1):40-5. PMID:15464979 doi:http://dx.doi.org/S0006-291X(04)02051-0
↑ Peiter E, Maathuis FJ, Mills LN, Knight H, Pelloux J, Hetherington AM, Sanders D. The vacuolar Ca2+-activated channel TPC1 regulates germination and stomatal movement. Nature. 2005 Mar 17;434(7031):404-8. PMID:15772667 doi:http://dx.doi.org/nature03381
↑ Guo J, Zeng W, Chen Q, Lee C, Chen L, Yang Y, Cang C, Ren D, Jiang Y. Structure of the voltage-gated two-pore channel TPC1 from Arabidopsis thaliana. Nature. 2015 Dec 21. doi: 10.1038/nature16446. PMID:26689363 doi:http://dx.doi.org/10.1038/nature16446

1 Structural highlights
2 Function
3 Publication Abstract from PubMed
4 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/5e1j"

@@ Line 3: / Line 3: @@
 <StructureSection load='5e1j' size='340' side='right' caption='[[5e1j]], [[Resolution|resolution]] 3.31&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[5e1j]] is a 1 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5E1J OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5E1J FirstGlance]. <br>
+<table><tr><td colspan='2'>[[5e1j]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Arath Arath]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5E1J OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5E1J FirstGlance]. <br>
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=BA:BARIUM+ION'>BA</scene>, <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'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5e1j FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5e1j OCA], [http://pdbe.org/5e1j PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5e1j RCSB], [http://www.ebi.ac.uk/pdbsum/5e1j PDBsum]</span></td></tr>
+<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">TPC1, CCH1, FOU2, At4g03560, F9H3.19, T5L23.5 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=3702 ARATH])</td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=5e1j FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5e1j OCA], [http://pdbe.org/5e1j PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5e1j RCSB], [http://www.ebi.ac.uk/pdbsum/5e1j PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5e1j ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 22: / Line 23: @@
 __TOC__
 </StructureSection>
+[[Category: Arath]]
 [[Category: Chen, L]]
 [[Category: Chen, Q]]

5e1j

From Proteopedia

Revision as of 09:53, 22 November 2017

Structure of voltage-gated two-pore channel TPC1 from Arabidopsis thaliana

Structural highlights

Function

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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