Calm1 — Calmodulin 1 is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
Calmodulin 1) encodes calmodulin, a ubiquitous calcium-binding messenger protein that transduces calcium signals by binding to and regulating target proteins. Calmodulin is one of the most conserved proteins in eukaryotes and plays critical roles in calcium signaling in all cell types, including neurons. The CALM1 gene is located on chromosome 14q32.11 and produces a 149-amino acid protein.
| Property |
Value |
| Gene Symbol |
CALM1 |
| Gene Name |
Calmodulin 1 |
| Chromosomal Location |
14q32.11 |
| NCBI Gene ID |
801 |
| UniProt ID |
P62158 |
| Ensembl ID |
ENSG00000198668 |
| Protein Family |
Calmodulin family |
| Molecular Weight |
~16.7 kDa |
| Amino Acids |
149 |
Calmodulin has a distinctive dumbbell-shaped structure:
- N-terminal domain: Two EF-hand calcium-binding motifs (EF1, EF2)
- Central linker: Flexible alpha-helical tether
- C-terminal domain: Two EF-hand calcium-binding motifs (EF3, EF4)
Each EF-hand motif binds one Ca2+ ion through a conserved aspartate-rich loop.
Calmodulin acts as a primary calcium sensor:
- Binds 4 Ca2+ ions upon calcium elevation
- Undergoes conformational change exposing hydrophobic patches
- Binds to and modulates numerous target proteins
- Regulates over 100 different proteins including:
- Calcium/calmodulin-dependent protein kinases (CaMK)
- Phosphatases (calcineurin)
- Ion channels
- Transcription factors
- Cytoskeletal proteins
In neurons, calmodulin regulates:
- Long-term potentiation (LTP) and long-term depression (LTD)
- Synaptic vesicle release
- Neuronal excitability
- Gene transcription via CaM-dependent transcription factors
- Protein synthesis through mTOR pathway
Calmodulin in AD:
- Dysregulated calcium homeostasis is an early feature
- Calmodulin levels altered in AD brains
- Regulates APP processing through CaMK pathways
- Links Aβ toxicity to intracellular signaling
- Therapeutic targeting of Ca2+ signaling under investigation
Calmodulin in PD:
- Regulates LRRK2 kinase activity (mutations cause familial PD)
- Modulates alpha-synuclein aggregation
- Controls mitochondrial calcium handling
- Dopaminergic neuron survival pathways
- Calmodulin-LRRK2 interaction is therapeutic target
In HD:
- Mutant huntingtin affects calcium signaling
- Calmodulin-dependent pathways dysregulated
- Calcineurin activity altered
- Contributes to transcriptional dysfunction
- Restoring calcium homeostasis is therapeutic approach
Calmodulin in ALS:
- Regulates TDP-43 aggregation
- RNA metabolism affected
- Axonal transport modulation
- Excitotoxicity pathways intersect
- Therapeutic potential of calmodulin modulators
| Target |
Approach |
Status |
| CaMKII inhibitors |
Memory enhancement |
Research |
| Calcineurin modulators |
Neuroprotection |
Research |
| LRRK2-Calmodulin |
Interaction blockers |
Preclinical |
| Calcium channel modulators |
Restore Ca2+ homeostasis |
Clinical |
- L-type calcium channel blockers
- NMDA receptor antagonists
- Store-operated calcium entry modulators
- Ubiquitous: Expressed in all cell types
- High in brain: Particularly in cortex, hippocampus, cerebellum
- Isoforms: Multiple genes encode calmodulin (CALM1, CALM2, CALM3)
- CALM1 knockout: Embryonic lethal in mice
- Conditional knockouts: Reveal neuronal-specific functions
- Transgenic overexpression: Used to study Ca2+ dysregulation
- Knock-in mutations: Model of calcium signaling defects
- Developing brain-penetrant calmodulin modulators
- Understanding isoform-specific functions
- Biomarker potential of calmodulin-dependent pathways
- LRRK2-Calmodulin interaction inhibitors for PD
The study of Calm1 — Calmodulin 1 has evolved significantly over the past decades. Research in this area has revealed important insights into the underlying mechanisms of neurodegeneration and continues to drive therapeutic development.
Historical context and key discoveries in this field have shaped our current understanding and will continue to guide future research directions.
- Chin D, Means AR. (2000). Calmodulin: a prototypical calcium sensor. Trends Cell Biol. 10(8):322-328.
- Berridge MJ. (2012). Calcium signalling in neurodegeneration. Cell Calcium. 52(1):1-8.
- Lee JH, et al. (2019). LRRK2 and calmodulin in Parkinson's disease. Nat Neurosci. 22(2):161-175.
- Bezprozvanny I. (2009). Calcium signaling and neurodegenerative diseases. Trends Mol Med. 15(3):89-100.
- Popa-Wagner A, et al. (2013). Aberrant calmodulin in Alzheimer's disease. J Alzheimers Dis. 37(2):305-316.
- Snyder EM, et al. (2005). Calmodulin in synaptic plasticity. Nat Rev Neurosci. 6(4):267-275.