CALCML1 Gene

CALM1 - Calmodulin 1

Introduction

Calcml1 Gene is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.

<div class="infobox infobox-gene"> [@berridge2003]
<table>
<tr><th colspan="2" style="background:#e8f4f8; text-align:center; font-size:1.1em;">Calmodulin 1</th></tr>
<tr><td><strong>Gene Symbol</strong></td><td>CALM1</td></tr>
<tr><td><strong>Full Name</strong></td><td>Calmodulin 1</td></tr>
<tr><td><strong>Chromosomal Location</strong></td><td>14q32.11</td></tr>
<tr><td><strong>NCBI Gene ID</strong></td><td>[801](https://www.ncbi.nlm.nih.gov/gene/801)</td></tr>
<tr><td><strong>Ensembl ID</strong></td><td>ENSG00000143819</td></tr>
<tr><td><strong>UniProt ID</strong></td><td>[P0DP23](https://www.uniprot.org/uniprot/P0DP23)</td></tr>
<tr><td><strong>Associated Diseases</strong></td><td>Long QT Syndrome, Epilepsy, Alzheimer's Disease, Parkinson's Disease, Cardiac Arrhythmias</td></tr>
</table>
</div>

Overview

CALM1 encodes calmodulin 1, a ubiquitous calcium sensor protein that mediates numerous cellular processes by binding calcium and regulating target proteins[@chin2000]. Calmodulin is one of the most conserved proteins in eukaryotes, serving as a primary calcium signal transducer that activates over 100 different target proteins. In the nervous system, calmodulin plays critical roles in synaptic plasticity, learning and memory, and regulation of neuronal excitability[@berridge2003].

...

CALM1 - Calmodulin 1

Introduction

Calcml1 Gene is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.

<div class="infobox infobox-gene"> [@berridge2003]
<table>
<tr><th colspan="2" style="background:#e8f4f8; text-align:center; font-size:1.1em;">Calmodulin 1</th></tr>
<tr><td><strong>Gene Symbol</strong></td><td>CALM1</td></tr>
<tr><td><strong>Full Name</strong></td><td>Calmodulin 1</td></tr>
<tr><td><strong>Chromosomal Location</strong></td><td>14q32.11</td></tr>
<tr><td><strong>NCBI Gene ID</strong></td><td>[801](https://www.ncbi.nlm.nih.gov/gene/801)</td></tr>
<tr><td><strong>Ensembl ID</strong></td><td>ENSG00000143819</td></tr>
<tr><td><strong>UniProt ID</strong></td><td>[P0DP23](https://www.uniprot.org/uniprot/P0DP23)</td></tr>
<tr><td><strong>Associated Diseases</strong></td><td>Long QT Syndrome, Epilepsy, Alzheimer's Disease, Parkinson's Disease, Cardiac Arrhythmias</td></tr>
</table>
</div>

Overview

CALM1 encodes calmodulin 1, a ubiquitous calcium sensor protein that mediates numerous cellular processes by binding calcium and regulating target proteins[@chin2000]. Calmodulin is one of the most conserved proteins in eukaryotes, serving as a primary calcium signal transducer that activates over 100 different target proteins. In the nervous system, calmodulin plays critical roles in synaptic plasticity, learning and memory, and regulation of neuronal excitability[@berridge2003].

Gene Structure

• Chromosomal location: 14q32.11
• Gene family: Calcium and integrin-binding (CIB) family
• Alternative splicing: Multiple transcripts

Protein Structure

Primary Structure

• Length: 149 amino acids
• Molecular weight: ~16.7 kDa
• Isoelectric point: Acidic (pI ~4.0)

Domain Organization

• EF-hand motifs: 4 calcium-binding domains
• N-terminal domain: EF-hands I and II
• C-terminal domain: EF-hands III and IV
• Central linker: Flexible hinge region

Calcium Binding

• Each EF-hand binds one Ca²⁺ ion
• Conformational change upon calcium binding
• Exposes hydrophobic pockets for target binding

Molecular Function

Calcium Signal Transduction

Calmodulin acts as a calcium sensor with broad cellular functions:

Target Activation

• Kinases: CaMKII, CaMKK, MLCK
• Phosphatases: Calcineurin (PP2B)
• Ion channels: Ca²⁺-activated K⁺ channels, [NMDA](/entities/nmda-receptor) receptors
• Transcription factors: CREB, NFAT

Calcium Homeostasis

• Calcium-buffering capacity
• Sequestration and release mechanisms

Neuronal Functions

Synaptic Plasticity

• [LTP](/mechanisms/long-term-potentiation)mechanisms/long-term-potentiation)/LTD: Critical for NMDA receptor-dependent plasticity
• CaMKII activation: Master regulator of synaptic strengthening
• CREB signaling: Gene expression for memory consolidation

Intracellular Signaling

• Second messenger system: Converts Ca²⁺ signals to cellular responses
• Temporal coding: Fast response to calcium transients
• Spatial signaling: Localized calmodulin microdomains

Expression Pattern

Tissue Distribution

• Ubiquitous expression across all tissues
• Highest in brain, heart, skeletal muscle

Cellular Localization

• Cytosolic and membrane-associated
• Enriched in postsynaptic densities
• Present in nuclear and mitochondrial compartments

Role in Disease

Long QT Syndrome

CALM1 mutations cause cardiac arrhythmias:

• Mechanism: Altered regulation of cardiac ion channels
• Phenotype: Prolonged QT interval, arrhythmias
• Treatment: Beta-blockers, implantable cardioverter-defibrillator

Epilepsy

• Variants: CALM1 mutations in epileptic encephalopathy
• Mechanism: Dysregulated calcium signaling
• Target: Calmodulin-dependent pathways

Neurodegenerative Diseases

Alzheimer's Disease

• [Tau](/proteins/tau) phosphorylation: Calmodulin activates tau kinases
• Amyloid effects: [Aβ](/proteins/amyloid-beta)-induced calcium dysregulation
• Therapeutic target: Calmodulin antagonists

Parkinson's Disease

• [Alpha-synuclein](/proteins/alpha-synuclein): Calmodulin affects aggregation
• Dopaminergic [neurons](/entities/neurons): Calcium homeostasis
• Neuroprotection: Calmodulin modulators

Other Conditions

• Cardiac hypertrophy: Calmodulin-dependent signaling
• Cancer: Proliferation and [apoptosis](/entities/apoptosis)
• Metabolic disorders: Insulin signaling

Therapeutic Implications

Drug Development

• Calmodulin antagonists: For neuroprotection
• Channel modulators: Target calmodulin-regulated channels
• Kinase inhibitors: Downstream of calmodulin

Research Applications

• Fluorescent sensors: Calcium imaging dyes
• Genetic tools: Calmodulin-binding peptides

Research Directions

Structural studies: Calmodulin-target interactions

Therapeutic development: Selective modulators

Biomarkers: Calcium signaling dysfunction markers

Genetics: Variant pathogenicity

Model systems: In vitro and in vivo models

Animal Models

• CALM1 knockout: Embryonic lethal in mice
• Conditional knockouts: Tissue-specific deletion
• Transgenic models: Disease-associated variants

See Also

• [Calmodulin Protein](/proteins/calmodulin-protein)
• [CaMKII](/entities/camkii)
• [Calcineurin](/genes/calcineurin)
• [Calcium Signaling Pathway](/mechanisms/calcium-signaling-dysregulation))
• [Long QT Syndrome](/diseases/long-qt-syndrome)
• [Alzheimer's Disease](/diseases/alzheimers-disease)
• [Parkinson's Disease](/diseases/parkinsons-disease)
• [Synaptic Plasticity](/mechanisms/synaptic-plasticity)

External Links

• [NCBI Gene: CALM1](https://www.ncbi.nlm.nih.gov/gene/801)
• [UniProt: P0DP23](https://www.uniprot.org/uniprot/P0DP23)
• [Ensembl: ENSG00000143819](https://www.ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000143819)
• [PDB: 1CLL](https://www.rcsb.org/structure/1CLL)
• [Allen Brain Atlas: CALM1](https://human.brain-map.org/microarray/search/show?search_term=CALM1)

Background

The study of Calcml1 Gene 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.

References

Chin D, Means AR, Calmodulin: a versatile calcium messenger (2000)

Berridge MJ, et al, Calcium signalling: dynamics, homeostasis and remodelling (2003)