Ion channel function is fundamental to the existence of life. In metazoans, the coordinate activities of voltage-gated Na+ channels underlie cellular excitability and control neuronal communication, cardiac excitation-contraction coupling, and skeletal muscle function. However, despite decades of research and linkage of Na+ channel dysfunction with arrhythmia, epilepsy, and myotonia, little progress has been made toward understanding the fundamental processes that regulate this family of proteins. Here, we have identified βIV-spectrin as a multifunctional regulatory platform for Na+ channels in mice. We found that βIV-spectrin targeted critical structural and regulatory proteins to excitable membranes in the heart and brain. Animal models harboring mutant βIV-spectrin alleles displayed aberrant cellular excitability and whole animal physiology. Moreover, we identified a regulatory mechanism for Na+ channels, via direct phosphorylation by βIV-spectrin–targeted calcium/calmodulin-dependent kinase II (CaMKII). Collectively, our data define an unexpected but indispensable molecular platform that determines membrane excitability in the mouse heart and brain.
Thomas J. Hund, Olha M. Koval, Jingdong Li, Patrick J. Wright, Lan Qian, Jedidiah S. Snyder, Hjalti Gudmundsson, Crystal F. Kline, Nathan P. Davidson, Natalia Cardona, Matthew N. Rasband, Mark E. Anderson, Peter J. Mohler
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Structural and Functional Refinement of the Axon Initial Segment in Avian Cochlear Nucleus during Development
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The Journal of neuroscience : the official journal of the Society for Neuroscience | 2020 |
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The Journal of biological chemistry | 2017 |
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B Onal, D Gratz, TJ Hund |
American journal of physiology. Heart and circulatory physiology | 2017 |
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HR Manring, OA Carter, MA Ackermann |
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Axonal Membranes and Their Domains: Assembly and Function of the Axon Initial Segment and Node of Ranvier
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Frontiers in cellular neuroscience | 2017 |
A recessive mutation in beta-IV-spectrin (SPTBN4) associates with congenital myopathy, neuropathy, and central deafness
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Journal of Molecular and Cellular Cardiology | 2014 |
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Cardiovascular Research | 2014 |
Toward a hierarchy of mechanisms in CaMKII-mediated arrhythmia
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The Journal of Physiology | 2014 |
Ankyrin-G Coordinates Intercalated Disc Signaling Platform to Regulate Cardiac Excitability In Vivo
MA Makara, J Curran, SC Little, H Musa, I Polina, SA Smith, PJ Wright, SD Unudurthi, J Snyder, V Bennett, TJ Hund, PJ Mohler |
Circulation research | 2014 |
Nav Channel Complex Heterogeneity: New Targets for the Treatment of Arrhythmia?
TJ Hund, PJ Mohler |
Circulation | 2014 |
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IV-Spectrin regulates TREK-1 membrane targeting in the heart
TJ Hund, JS Snyder, X Wu, P Glynn, OM Koval, B Onal, ND Leymaster, SD Unudurthi, J Curran, C Camardo, PJ Wright, PF Binkley, ME Anderson, PJ Mohler |
Cardiovascular Research | 2014 |
Assembly of the cardiac intercalated disk during pre- and postnatal development of the human heart
A Vreeker, L Stuijvenberg, TJ Hund, PJ Mohler, PG Nikkels, TA van Veen |
PloS one | 2014 |
Modeling CaMKII in cardiac physiology: from molecule to tissue
B Onal, SD Unudurthi, TJ Hund |
Frontiers in pharmacology | 2014 |
Role of the Axonal Initial Segment in Psychiatric Disorders: Function, Dysfunction, and Intervention
WC Hsu, CL Nilsson, F Laezza |
Frontiers in Psychiatry | 2014 |
Diseases Caused by Mutations in Nav1.5 Interacting Proteins
JW Kyle, JC Makielski |
Cardiac Electrophysiology Clinics | 2014 |
EHD3-Dependent Endosome Pathway Regulates Cardiac Membrane Excitability and Physiology
J Curran, MA Makara, SC Little, H Musa, B Liu, X Wu, I Polina, JS Alecusan, P Wright, J Li, GE Billman, PA Boyden, S Gyorke, H Band, TJ Hund, PJ Mohler |
Circulation research | 2014 |
The arrhythmogenic consequences of increasing late INa in the cardiomyocyte
JC Shryock, Y Song, S Rajamani, C Antzelevitch, L Belardinelli |
Cardiovascular Research | 2013 |
The promise of CaMKII inhibition for heart disease: preventing heart failure and arrhythmias
BD Westenbrink, AG Edwards, AD McCulloch, JH Brown |
Expert Opinion on Therapeutic Targets | 2013 |
Mechanisms of Altered Ca 2+ Handling in Heart Failure
M Luo, ME Anderson |
Circulation research | 2013 |
Redox Regulation of Sodium and Calcium Handling
S Wagner, AG Rokita, ME Anderson, LS Maier |
Antioxidants & Redox Signaling | 2013 |
Role of late sodium current as a potential arrhythmogenic mechanism in the progression of pressure-induced heart disease
K Toischer, N Hartmann, S Wagner, TH Fischer, J Herting, BC Danner, CM Sag, TJ Hund, PJ Mohler, L Belardinelli, G Hasenfuss, LS Maier, S Sossalla |
Journal of Molecular and Cellular Cardiology | 2013 |
Post-translational modifications of the cardiac Na channel: contribution of CaMKII-dependent phosphorylation to acquired arrhythmias
AW Herren, DM Bers, E Grandi |
American journal of physiology. Heart and circulatory physiology | 2013 |
A Memory Molecule, Ca2+/Calmodulin-Dependent Protein Kinase II and Redox Stress; Key Factors for Arrhythmias in a Diseased Heart
YH Song |
Korean Circulation Journal | 2013 |
Molecular determinants for cardiovascular TRPC6 channel regulation by Ca 2+ /calmodulin-dependent kinase II: Molecular mechanism for CaMKII-mediated TRPC6 regulation
J Shi, N Geshi, S Takahashi, S Kiyonaka, J Ichikawa, Y Hu, Y Mori, Y Ito, R Inoue |
The Journal of Physiology | 2013 |
Channelopathies from mutations in the cardiac sodium channel protein complex
GS Adsit, R Vaidyanathan, CM Galler, JW Kyle, JC Makielski |
Journal of Molecular and Cellular Cardiology | 2013 |
L-type calcium channels play a critical role in maintaining lens transparency by regulating phosphorylation of aquaporin-0 and myosin light chain and expression of connexins
R Maddala, T Nagendran, GG de Ridder, KL Schey, PV Rao |
PloS one | 2013 |
Deletion of the last five C-terminal amino acid residues of connexin43 leads to lethal ventricular arrhythmias in mice without affecting coupling via gap junction channels
I Lübkemeier, RP Requardt, X Lin, P Sasse, R Andrié, JW Schrickel, H Chkourko, FF Bukauskas, JS Kim, M Frank, D Malan, J Zhang, A Wirth, R Dobrowolski, PJ Mohler, S Offermanns, BK Fleischmann, M Delmar, K Willecke |
Basic Research in Cardiology | 2013 |
Integrative Biological Analysis For Neuropsychopharmacology
MR Emmett, RA Kroes, JR Moskal, CA Conrad, W Priebe, F Laezza, A Meyer-Baese, CL Nilsson |
Neuropsychopharmacology | 2013 |
DNA methylation map of mouse and human brain identifies target genes in Alzheimer's disease
JV Sanchez-Mut, E Aso, N Panayotis, I Lott, M Dierssen, A Rabano, RG Urdinguio, AF Fernandez, A Astudillo, JI Martin-Subero, B Balint, MF Fraga, A Gomez, C Gurnot, JC Roux, J Avila, TK Hensch, I Ferrer, M Esteller |
Brain | 2013 |
Ankyrin-G participates in INa remodeling in myocytes from the border zones of infarcted canine heart
W Dun, JS Lowe, P Wright, TJ Hund, PJ Mohler, PA Boyden |
PloS one | 2013 |
βIV-Spectrin and CaMKII facilitate Kir6.2 regulation in pancreatic beta cells
CF Kline, PJ Wright, OM Koval, EJ Zmuda, BL Johnson, ME Anderson, T Hai, TJ Hund, PJ Mohler |
Proceedings of the National Academy of Sciences | 2013 |
Calcineurin signaling mediates activity-dependent relocation of the axon initial segment
MD Evans, RP Sammons, S Lebron, AS Dumitrescu, TB Watkins, VN Uebele, JJ Renger, MS Grubb |
The Journal of neuroscience : the official journal of the Society for Neuroscience | 2013 |
Ankyrin-B protein in heart failure: identification of a new component of metazoan cardioprotection
F Kashef, J Li, P Wright, J Snyder, F Suliman, A Kilic, RS Higgins, ME Anderson, PF Binkley, TJ Hund, PJ Mohler |
The Journal of biological chemistry | 2012 |
Na + Channel I–II Loop Mediates Parallel Genetic and Phosphorylation-Dependent Gating Changes
DM Bers, AW Herren |
Circulation | 2012 |
Ca 2+ /Calmodulin-Dependent Protein Kinase II–Based Regulation of Voltage-Gated Na + Channel in Cardiac Disease
OM Koval, JS Snyder, RM Wolf, RE Pavlovicz, P Glynn, J Curran, ND Leymaster, W Dun, PJ Wright, N Cardona, L Qian, CC Mitchell, PA Boyden, PF Binkley, C Li, ME Anderson, PJ Mohler, TJ Hund |
Circulation | 2012 |
Calmodulin-dependent protein kinase II: linking heart failure and arrhythmias
PD Swaminathan, A Purohit, TJ Hund, ME Anderson |
Circulation research | 2012 |
New Therapeutic Targets in Cardiology: Arrhythmias and Ca 2+ /Calmodulin-Dependent Kinase II (CaMKII)
AG Rokita, ME Anderson |
Circulation | 2012 |
Mass Spectrometry-Based Identification of Native Cardiac Nav1.5 Channel α Subunit Phosphorylation Sites
C Marionneau, CF Lichti, P Lindenbaum, F Charpentier, JM Nerbonne, RR Townsend, J Mérot |
Journal of Proteome Research | 2012 |
Ca2+/calmodulin-dependent protein kinase II (CaMKII) regulates cardiac sodium channel NaV1.5 gating by multiple phosphorylation sites
NM Ashpole, AW Herren, KS Ginsburg, JD Brogan, DE Johnson, TR Cummins, DM Bers, A Hudmon |
The Journal of biological chemistry | 2012 |
Remodeling of the cardiac sodium channel, connexin 43, and plakoglobin at the intercalated disk in patients with arrhythmogenic cardiomyopathy
M Noorman, S Hakim, E Kessler, JA Groeneweg, MG Cox, A Asimaki, HV van Rijen, L Stuijvenberg, H Chkourko, MA van der Heyden, MA Vos, N Jonge, JJ van der Smagt, D Dooijes, A Vink, RA de Weger, A Varro, JM de Bakker, JE Saffitz, TJ Hund, PJ Mohler, M Delmar, RN Hauer, TA van Veen |
Heart Rhythm | 2012 |
IκBα is not required for axon initial segment assembly
SA Buffington, JM Sobotzik, C Schultz, MN Rasband |
Molecular and Cellular Neuroscience | 2012 |
Simulation and Mechanistic Investigation of the Arrhythmogenic Role of the Late Sodium Current in Human Heart Failure
B Trenor, K Cardona, JF Gomez, S Rajamani, JM Ferrero, L Belardinelli, J Saiz |
PloS one | 2012 |
Defects in Cytoskeletal Signaling Pathways, Arrhythmia, and Sudden Cardiac Death
S Smith, J Curran, TJ Hund, PJ Mohler |
Frontiers in physiology | 2012 |
Age-Related Intraneuronal Elevation of αII-Spectrin Breakdown Product SBDP120 in Rodent Forebrain Accelerates in 3×Tg-AD Mice
Y Cai, HX Zhu, JM Li, XG Luo, PR Patrylo, GM Rose, J Streeter, R Hayes, KK Wang, XX Yan, A Jeromin |
PloS one | 2012 |
Sodium current deficit and arrhythmogenesis in a murine model of plakophilin-2 haploinsufficiency
M Cerrone, M Noorman, X Lin, H Chkourko, FX Liang, R der Nagel, T Hund, W Birchmeier, P Mohler, TA van Veen, HV van Rijen, M Delmar |
Cardiovascular Research | 2012 |
CaMKII inhibition rescues proarrhythmic phenotypes in the model of human ankyrin-B syndrome
S DeGrande, D Nixon, O Koval, JW Curran, P Wright, Q Wang, F Kashef, D Chiang, N Li, XH Wehrens, ME Anderson, TJ Hund, PJ Mohler |
Heart rhythm : the official journal of the Heart Rhythm Society | 2012 |
Cysteine 70 of ankyrin-G is S-palmitoylated and is required for function of ankyrin-G in membrane domain assembly
M He, P Jenkins, V Bennett |
The Journal of biological chemistry | 2012 |
CaMKII in the Cardiovascular System: Sensing Redox States
JR Erickson, BJ He, IM Grumbach, ME Anderson |
Physiological reviews | 2011 |
CaMKII in myocardial hypertrophy and heart failure
ME Anderson, JH Brown, DM Bers |
Journal of Molecular and Cellular Cardiology | 2011 |
Fluorescence Resonance Energy Transfer–Based Sensor Camui Provides New Insight Into Mechanisms of Calcium/Calmodulin-Dependent Protein Kinase II Activation in Intact Cardiomyocytes
JR Erickson, R Patel, A Ferguson, J Bossuyt, DM Bers |
Circulation research | 2011 |
Beyond membrane channelopathies: alternative mechanisms underlying complex human disease
KD Boudoulas, PJ Mohler |
Acta Pharmacologica Sinica | 2011 |
Coordinating electrical activity of the heart: ankyrin polypeptides in human cardiac disease
J Curran, PJ Mohler |
Expert Opinion on Therapeutic Targets | 2011 |
Compartmentation of membrane processes and nucleotide dynamics in diffusion-restricted cardiac cell microenvironment
AE Alekseev, S Reyes, VA Selivanov, PP Dzeja, A Terzic |
Journal of Molecular and Cellular Cardiology | 2011 |
Reactive Oxygen Species–Activated Ca/Calmodulin Kinase IIδ Is Required for Late INa Augmentation Leading to Cellular Na and Ca Overload
S Wagner, HM Ruff, SL Weber, S Bellmann, T Sowa, T Schulte, ME Anderson, E Grandi, DM Bers, J Backs, L Belardinelli, LS Maier |
Circulation research | 2011 |
Short- and long-term plasticity at the axon initial segment
MS Grubb, Y Shu, H Kuba, MN Rasband, VC Wimmer, KJ Bender |
The Journal of neuroscience : the official journal of the Society for Neuroscience | 2011 |
Di-rectifying Tau
S Jha, MN Rasband |
The EMBO Journal | 2011 |
Spectrin-based skeleton as an actor in cell signaling
B Machnicka, R Grochowalska, DM Bogusławska, AF Sikorski, MC Lecomte |
Cellular and Molecular Life Sciences | 2011 |
Schwann cell spectrins modulate peripheral nerve myelination
K Susuki, AR Raphael, Y Ogawa, MC Stankewich, E Peles, WS Talbot, MN Rasband |
Proceedings of the National Academy of Sciences | 2011 |
Ankyrin-based Cellular Pathways for Cardiac Ion Channel and Transporter Targeting and Regulation
SR Cunha, PJ Mohler |
Seminars in Cell & Developmental Biology | 2011 |
Interactions Between Ankyrin-G, Plakophilin-2, and Connexin43 at the Cardiac Intercalated Disc
PY Sato, W Coombs, X Lin, O Nekrasova, KJ Green, LL Isom, SM Taffet, M Delmar |
Circulation research | 2011 |
Location, location, regulation: a novel role for beta spectrin in the heart
Robert S. Kass, Kevin Sampson |
Journal of Clinical Investigation | 2010 |
Pulmonary surfactant: an immunological perspective
ZC Chroneos, Z Sever-Chroneos, VL Shepherd |
Cellular physiology and biochemistry : international journal of experimental cellular physiology, biochemistry, and pharmacology | 2009 |