kth.sePublications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Cryo-EM structure of the human Kv3.1 channel reveals gating control by the cytoplasmic T1 domain
Univ Oxford, Ctr Med Discovery, Nuffield Dept Med, Roosevelt Dr, Oxford OX3 7DQ, England.;Univ Oxford, Nuffield Dept Med, Struct Genom Consortium, Roosevelt Dr, Oxford OX3 7DQ, England..
Thomas Jefferson Univ, Dept Neurosci & Vickie, Sidney Kimmel Med Coll, Philadelphia, PA 19107 USA.;Thomas Jefferson Univ, Jack Farber Inst Neurosci, Sidney Kimmel Med Coll, Philadelphia, PA 19107 USA..
KTH, School of Engineering Sciences (SCI), Applied Physics. KTH, Centres, Science for Life Laboratory, SciLifeLab.
KTH, Centres, Science for Life Laboratory, SciLifeLab. KTH, School of Engineering Sciences (SCI), Applied Physics.ORCID iD: 0000-0002-7968-8359
Show others and affiliations
2022 (English)In: Nature Communications, E-ISSN 2041-1723, Vol. 13, no 1, article id 4087Article in journal (Refereed) Published
Abstract [en]

Kv3 channels have distinctive gating kinetics tailored for rapid repolarization in fast-spiking neurons. Malfunction of this process due to genetic variants in the KCNC1 gene causes severe epileptic disorders, yet the structural determinants for the unusual gating properties remain elusive. Here, we present cryo-electron microscopy structures of the human Kv3.1a channel, revealing a unique arrangement of the cytoplasmic tetramerization domain T1 which facilitates interactions with C-terminal axonal targeting motif and key components of the gating machinery. Additional interactions between S1/S2 linker and turret domain strengthen the interface between voltage sensor and pore domain. Supported by molecular dynamics simulations, electrophysiological and mutational analyses, we identify several residues in the S4/S5 linker which influence the gating kinetics and an electrostatic interaction between acidic residues in alpha 6 of T1 and R449 in the pore-flanking S6T helices. These findings provide insights into gating control and disease mechanisms and may guide strategies for the design of pharmaceutical drugs targeting Kv3 channels. Here, Chi et al. report cryo-EM structures of the human Kv3.1a channel, revealing a unique arrangement of the cytoplasmic T1 domain, which allows the interactions with the C-terminal axonal targeting motif and key components of the gating machinery. These findings provide insights into the functional relevance of previously unknown interdomain interactions in Kv3 channels and may guide the design of new pharmaceutical drugs.

Place, publisher, year, edition, pages
Springer Nature , 2022. Vol. 13, no 1, article id 4087
National Category
Biophysics
Identifiers
URN: urn:nbn:se:kth:diva-315942DOI: 10.1038/s41467-022-29594-wISI: 000826101400018PubMedID: 35840580Scopus ID: 2-s2.0-85134215136OAI: oai:DiVA.org:kth-315942DiVA, id: diva2:1684694
Note

QC 20230612

Available from: 2022-07-28 Created: 2022-07-28 Last updated: 2023-06-12Bibliographically approved

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full textPubMedScopus

Authority records

Sridhar, AkshayCowgill, JohnDelemotte, Lucie

Search in DiVA

By author/editor
Sridhar, AkshayCowgill, JohnDelemotte, Lucie
By organisation
Applied PhysicsScience for Life Laboratory, SciLifeLab
In the same journal
Nature Communications
Biophysics

Search outside of DiVA

GoogleGoogle Scholar

doi
pubmed
urn-nbn

Altmetric score

doi
pubmed
urn-nbn
Total: 41 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf