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Structure paper

TitleSymmetry Reduction in a Hyperpolarization-Activated Homotetrameric Ion Channel.
Journal, issue, pagesBiochemistry, Vol. 61, Issue 20, Page 2177-2181, Year 2022
Publish dateOct 18, 2022
AuthorsMiles Sasha Dickinson / Sergei Pourmal / Meghna Gupta / Maxine Bi / Robert M Stroud /
PubMed AbstractPlants obtain nutrients from the soil via transmembrane transporters and channels in their root hairs, from which ions radially transport in toward the xylem for distribution across the plant body. ...Plants obtain nutrients from the soil via transmembrane transporters and channels in their root hairs, from which ions radially transport in toward the xylem for distribution across the plant body. We determined structures of the hyperpolarization-activated channel AKT1 from , which mediates K uptake from the soil into plant roots. These structures of AtAKT1 embedded in lipid nanodiscs show that the channel undergoes a reduction of C4 to C2 symmetry, possibly to regulate its electrical activation.
External linksBiochemistry / PubMed:34964607 / PubMed Central
MethodsEM (single particle)
Resolution2.8 Å
Structure data

25691

7t4x

EMDB-25691, PDB-7t4x:
AKT1 K+ channel from A. thaliana in MSP2N2 lipid nanodisc
Method: EM (single particle) / Resolution: 2.8 Å

Chemicals

ChemComp-K:
Unknown entry

ChemComp-PTY:
PHOSPHATIDYLETHANOLAMINE / phospholipid*YM

ChemComp-HOH:
WATER

Source
  • arabidopsis thaliana (thale cress)
KeywordsMEMBRANE PROTEIN / K+ channel / ion channel / hyperpolarization-activated channel / voltage-gated channel

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