Cited by 79Ion channel regulation and functionProtein Structure and DynamicsEnzyme Structure and Function

Pentameric Assembly of Potassium Channel Tetramerization Domain-Containing Protein 5

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Dementieva, Irina S., Tereshko, Valentina, McCrossan, Zoe A., Solomaha, Elena, Araki, Daniel, Xu, Chen, Grigorieff, Nikolaus, Goldstein, Steve A.N.·2009·Journal of Molecular Biology

Abstract

We report the X-ray crystal structure of human potassium channel tetramerization domain-containing protein 5 (KCTD5), the first member of the family to be so characterized. Four findings were unexpected. First, the structure reveals assemblies of five subunits while tetramers were anticipated; pentameric stoichiometry is observed also in solution by scanning transmission electron microscopy mass analysis and analytical ultracentrifugation. Second, the same BTB (bric-a-brac, tramtrack, broad complex) domain surface mediates the assembly of five KCTD5 and four voltage-gated K(+) (Kv) channel subunits; four amino acid differences appear crucial. Third, KCTD5 complexes have well-defined N- and C-terminal modules separated by a flexible linker that swivels by approximately 30 degrees; the C-module shows a new fold and is required to bind Golgi reassembly stacking protein 55 with approximately 1 microM affinity, as judged by surface plasmon resonance and ultracentrifugation. Fourth, despite the homology reflected in its name, KCTD5 does not impact the operation of Kv4.2, Kv3.4, Kv2.1, or Kv1.2 channels.

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Crossref · 10.1016/j.jmb.2009.01.030

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  • KCTD5 regulates GPCR signalling through ubiquitin-mediated degradation of Gβγ subunits.

    “KCTD5, which regulates GPCR signalling through ubiquitin-mediated degradation of Gβγ subunits 85,86 .”

    From Targeted protein degradation: expanding the toolbox (2019) · cites this paper as [86]

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Authors
Dementieva, I. S., Tereshko, V., McCrossan, Z. A., Solomaha, E., Araki, D., Xu, C., Grigorieff, N., & Goldstein, S. A. N.
Affiliations
  • University of Chicago (US)
  • Howard Hughes Medical Institute (US)
Corresponding author
Goldstein, Steve A.N.
Venue
Journal of Molecular Biology
Publisher
Elsevier BV
Published
2009-03
Volume
387
Issue
1
Pages
175-191
ISSN
0022-2836 (ISSN-L)
OpenAlex
W2034269043
Cited by
79
References
44
Citations by year
2026: 3 · 2025: 4 · 2024: 6 · 2023: 4 · 2022: 2 · 2021: 4 · 2020: 4 · 2019: 7 · 2017: 4 · 2016: 4 · 2015: 6 · 2014: 4 · 2013: 8 · 2012: 10
FWCI
2.55
Type
journal article
Language
en
Open access
Locations
  • Journal of Molecular Biology (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • eScholarship (California Digital Library) (submittedVersion, cc-by)
Funders
  • National Cancer Institute (Y1-CO-1020)
  • National Institute of General Medical Sciences (R01GM051851, Y1-GM-1104)
  • National Institute of Neurological Disorders and Stroke (R01NS058505)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ion channel regulation and function
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Structure and Dynamics
  • Physical Sciences › Materials Science › Materials Chemistry › Enzyme Structure and Function
Keywords
KCTD5, pentameric assembly, BTB domain, protein crystal structure, Kv4.2, Kv3.4, Kv2.1, Kv1.2, voltage-gated potassium channels, protein stoichiometry
MeSH terms
Amino Acid Sequence, Biopolymers, Humans, Models, Molecular, Molecular Sequence Data, Protein Conformation, Potassium Channels, Sequence Homology, Amino Acid, Crystallography, X-Ray, Surface Plasmon Resonance, Static Electricity

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