MARK4 — Microtubule Affinity Regulating Kinase 4 is a serine/threonine-protein kinase that plays important roles in [tau](/proteins/tau) phosphorylation, microtubule dynamics, and neurodegenerative disease pathogenesis. [@chen2020]
Introduction
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title: MARK4 Gene
MARK4 (Microtubule Affinity Regulating Kinase 4)
Overview
Mermaid diagram (expand to render)
MARK4 — Microtubule Affinity Regulating Kinase 4 is a serine/threonine-protein kinase that plays important roles in [tau](/proteins/tau) phosphorylation, microtubule dynamics, and neurodegenerative disease pathogenesis. [@chen2020]
Introduction
MARK4 (Microtubule Affinity Regulating Kinase 4) is a member of the AMP-activated protein kinase (AMPK)-related kinase family. It is primarily expressed in the brain and is involved in regulating microtubule stability through tau phosphorylation. MARK4 has been implicated in the pathogenesis of Alzheimer's disease and other neurodegenerative disorders.
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| Property | Value | |----------|-------| | Gene Symbol | MARK4 | | Full Name | Microtubule Affinity Regulating Kinase 4 | | Chromosomal Location | 19q13.32 | | NCBI Gene ID | 57731 | | OMIM ID | 608285 | | Ensembl ID | ENSG00000165548 | | UniProt ID | Q96GX8 | | Encoded Protein | MARK4 protein | | Associated Diseases | Alzheimer's disease, Parkinson's disease, tauopathies |
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Function
MARK4 is a serine/threonine-protein kinase that belongs to the CAMK (Ca²⁺/calmodulin-dependent protein kinase) group and AMPK-related kinase family. It was originally identified as a kinase that phosphorylates microtubule-associated proteins (MAPs), leading to microtubule destabilization.
Key normal physiological functions include:
Tau phosphorylation — MARK4 phosphorylates tau at multiple sites (Ser262, Ser356), disrupting tau-microtubule binding
Microtubule dynamics regulation — Controls microtubule stability and neuronal polarization
Cell polarity — Regulates cell polarity and neuronal differentiation
Metabolic regulation — Involved in lipid metabolism through phosphorylation of Lipin proteins
Centrosome/mitotic spindle function — Regulates microtubule organization during cell division
Disease Associations
Alzheimer's Disease (AD)
MARK4 is highly implicated in AD pathogenesis:
Tau pathology — Hyperactive MARK4 increases tau phosphorylation at pathogenic sites, promoting NFT formation
The study of Mark4 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.