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Activation-triggered subunit exchange between CaMKII holoenzymes facilitates the spread of kinase activity

Journal Article · · eLife
DOI:https://doi.org/10.7554/elife.01610· OSTI ID:1628804
 [1];  [2];  [3];  [2];  [3];  [4];  [5];  [6]
  1. Univ. of California, Berkeley, CA (United States). Dept. of Molecular and Cell Biology; Univ. of California, Berkeley, CA (United States). California Institute for Quantitative Biosciences, (QB3); Univ. of California, Berkeley, CA (United States). Howard Hughes Medical Inst.; DOE/OSTI
  2. Univ. of California, Berkeley, CA (United States). California Institute for Quantitative Biosciences, (QB3); Univ. of California, Berkeley, CA (United States). Howard Hughes Medical Inst.; Univ. of California, Berkeley, CA (United States). Dept. of Chemistry
  3. Univ. of California, Berkeley, CA (United States). Dept. of Molecular and Cell Biology; Univ. of California, Berkeley, CA (United States). California Institute for Quantitative Biosciences, (QB3); Univ. of California, Berkeley, CA (United States). Howard Hughes Medical Inst.
  4. Allosteros Therapeutics, Sunnyvale, CA (United States)
  5. Univ. of California, Berkeley, CA (United States). California Institute for Quantitative Biosciences, (QB3); Univ. of California, Berkeley, CA (United States). Howard Hughes Medical Inst.; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Materials Sciences Division; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Physical Biosciences Division
  6. Univ. of California, Berkeley, CA (United States). Dept. of Molecular and Cell Biology; Univ. of California, Berkeley, CA (United States). California Institute for Quantitative Biosciences, (QB3); Univ. of California, Berkeley, CA (United States). Howard Hughes Medical Inst.; Univ. of California, Berkeley, CA (United States). Dept. of Chemistry; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Physical Biosciences Division
The activation of the dodecameric Ca2+/calmodulin dependent kinase II (CaMKII) holoenzyme is critical for memory formation. We now report that CaMKII has a remarkable property, which is that activation of the holoenzyme triggers the exchange of subunits between holoenzymes, including unactivated ones, enabling the calcium-independent phosphorylation of new subunits. We show, using a single-molecule TIRF microscopy technique, that the exchange process is triggered by the activation of CaMKII, and that exchange is modulated by phosphorylation of two residues in the calmodulin-binding segment, Thr 305 and Thr 306. Based on these results, and on the analysis of molecular dynamics simulations, we suggest that the phosphorylated regulatory segment of CaMKII interacts with the central hub of the holoenzyme and weakens its integrity, thereby promoting exchange. Our results have implications for an earlier idea that subunit exchange in CaMKII may have relevance for information storage resulting from brief coincident stimuli during neuronal signaling.
Research Organization:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Organization:
National Institutes of Health (NIH); USDOE Office of Science (SC), Biological and Environmental Research (BER). Biological Systems Science Division
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1628804
Journal Information:
eLife, Journal Name: eLife Vol. 3; ISSN 2050-084X
Publisher:
eLife Sciences Publications, Ltd.Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (19)

Functional role of PGAM5 multimeric assemblies and their polymerization into filaments journal January 2019
Analysis of the CaMKIIα and β splice-variant distribution among brain regions reveals isoform-specific differences in holoenzyme formation journal April 2018
A multi-state model of the CaMKII dodecamer suggests a role for calmodulin in maintenance of autophosphorylation journal December 2019
Catalytically Dead αCaMKII K42M Mutant Acts as a Dominant Negative in the Control of Synaptic Strength journal April 2015
Architectural dynamics of CaMKII-actin networks text January 2019
Neuronal Gene Targets of NF-κB and Their Dysregulation in Alzheimer's Disease journal November 2016
Subunit exchange enhances information retention by CaMKII in dendritic spines journal November 2018
Variation in assembly stoichiometry in non‐metazoan homologs of the hub domain of Ca 2+ /calmodulin‐dependent protein kinase II journal April 2019
The CaMKII holoenzyme structure in activation-competent conformations journal June 2017
FRET-based sensor for CaMKII activity (FRESCA): A useful tool for assessing CaMKII activity in response to Ca 2+ oscillations in live cells journal June 2019
Long-term memory consolidation: The role of RNA-binding proteins with prion-like domains journal November 2016
Mechanics of CaMKII-actin networks posted_content May 2018
A Multi-State Model of the CaMKII Dodecamer Suggests a Role for Calmodulin in Maintenance of Autophosphorylation journal March 2019
Heterogeneity in human hippocampal CaMKII transcripts reveals allosteric hub-dependent regulation journal July 2020
Conformational coupling by trans-phosphorylation in calcium calmodulin dependent kinase II journal May 2019
Conformational coupling by trans-phosphorylation in calcium calmodulin dependent kinase II text January 2020
Conformational coupling by trans-phosphorylation in calcium calmodulin dependent kinase II text January 2020
Subunit exchange enhances information retention by CaMKII in dendritic spines journal November 2018
A homozygous loss-of-function CAMK2A mutation causes growth delay, frequent seizures and severe intellectual disability journal May 2018

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