KIF20A — Kinesin Family Member 20A
Overview
flowchart TD
KIF20A["KIF20A"] -->|"therapeutic target"| Hepatitis["Hepatitis"]
KIF20A["KIF20A"] -->|"interacts with"| Als["Als"]
KIF20A["KIF20A"] -->|"interacts with"| Ms["Ms"]
KIF20A["KIF20A"] -->|"interacts with"| Cancer["Cancer"]
KIF20A["KIF20A"] -->|"interacts with"| Tumor["Tumor"]
KIF20A["KIF20A"] -->|"therapeutic target"| MCC["MCC"]
KIF20A["KIF20A"] -->|"associated with"| SLC7A11["SLC7A11"]
KIF20A["KIF20A"] -->|"associated with"| SPP1["SPP1"]
KIF20A["KIF20A"] -->|"interacts with"| UBIQUITIN["UBIQUITIN"]
KIF20A["KIF20A"] -->|"interacts with"| CD8["CD8"]
KIF20A["KIF20A"] -->|"associated with"| HSP90AB1["HSP90AB1"]
KIF20A["KIF20A"] -->|"associated with"| KIF4A["KIF4A"]
KIF20A["KIF20A"] -->|"associated with"| JUN["JUN"]
KIF20A["KIF20A"] -->|"associated with"| G6PD["G6PD"]
style KIF20A fill:#4fc3f7,stroke:#333,color:#000
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KIF20A — Kinesin Family Member 20A
Overview
Mermaid diagram (expand to render)
<table class="infobox infobox-gene">
Gene Structure and Evolution The KIF20A gene spans approximately 35 kb on chromosome 5q31.2 and consists of 28 exons. It encodes a protein of 878 amino acids belonging to the kinesin-6 family, also known as the MKLP2 (Mitotic Kinesin-Like Protein 2) subfamily. Kinesin-6 proteins are essential for cytokinesis and have important functions in intracellular organization.
KIF20A is conserved among vertebrates and evolved from a common ancestor with KIF20B (M-phase phosphoprotein 1). Both proteins have essential mitotic functions but have diversified their cellular roles.
Protein Structure and Biochemistry KIF20A possesses key structural features:
Motor Domain Architecture
N-terminal motor domain (1-350 aa) : Contains ATP-binding site and microtubule interaction regionCoiled-coil region (350-700 aa) : Mediates dimerization and cargo bindingC-terminal tail (700-878 aa) : Regulatory domain controlling localizationBiochemical Properties
Processive movement : Can walk along microtubules for significant distancesATPase activity : Motor function coupled to ATP hydrolysisPlus-end directionality : Moves toward microtubule plus ends
Post-translational Modifications
Phosphorylation : Multiple sites regulated during cell cycleAcetylation : Affects motor function and localizationNormal Cellular Function
Cytokinesis KIF20A is essential for successful cell division:
Central spindle formation : Helps organize the mitotic spindleCentral zone assembly : Recruits necessary proteins to the midbodyAbscission : Facilitates the final separation of daughter cellsResearch demonstrates that KIF20A is critical for proper cytokinesis and its disruption leads to multinucleated cells [@barrett2019].
Golgi Dynamics KIF20A has important functions in Golgi apparatus organization:
Golgi stack maintenance : Helps maintain Golgi morphologyVesicle trafficking : Regulates transport through the GolgiMembrane dynamics : Contributes to Golgi vesicle formationThe Golgi is particularly important in neurons for protein sorting and trafficking to synapses, making KIF20A relevant to neuronal function [@yu2016].
Intracellular Transport Beyond mitosis, KIF20A participates in:
Vesicle transport : Along microtubule tracksOrganelle positioning : Maintaining cellular organizationMembrane trafficking : Regulating endocytic and exocytic pathways
Role in Disease
Cancer KIF20A is frequently dysregulated in cancer:
Overexpression : Commonly elevated in multiple cancer typesProliferation : Supports rapid cell division in tumorsMetastasis : Associated with invasion and spreadPrognosis : High expression often indicates poor outcomeKIF20A is considered a potential therapeutic target in cancer.
Neurodegeneration Connections While not directly mutated in AD or PD, KIF20A may be relevant:
Cell cycle re-entry : Neurons in neurodegeneration show markers of cell cycle activationGolgi function : Disrupted in several neurodegenerative diseasesTransport deficits : Contributes to overall intracellular trafficking
Hematopoiesis Research shows KIF20A regulates hematopoietic stem cell function [@mitsudome2018], demonstrating its importance in stem cell biology.
Protein-Protein Interactions
Mitotic Proteins
Aurora kinases : Regulate KIF20A during mitosisPLK1 : Phosphorylates KIF20A during cytokinesisRhoA : Required for KIF20A localizationGolgi Proteins
GRASP proteins : Golgi stacking factorsGolgi matrix proteins : Maintain Golgi structureMotor Proteins
Kinesin family members : May coordinate transportDynein : May participate in bidirectional transportTherapeutic Implications
Cancer therapy : KIF20A inhibitors may target proliferating tumor cellsStem cell biology : Understanding KIF20A function may inform regenerative medicineNeurobiology : Golgi-related functions relevant to neuronal health
See Also
[Axonal Transport](/mechanisms/axonal-transport)
[Kinesin Family](/proteins/kinesin-family)
[Cell Division](/mechanisms/cell-division)
[Golgi Apparatus](/mechanisms/golgi-apparatus)
[KIF20B](/genes/kif20b)
External Links
[NCBI Gene: KIF20A](https://www.ncbi.nlm.nih.gov/gene/9788)
[UniProt: O95237](https://www.uniprot.org/uniprot/O95237)
[Ensembl: ENSG00000112996](https://www.ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000112996)
References
[NCBI Gene: KIF20A (n.d.)](https://www.ncbi.nlm.nih.gov/gene/9788)
[Barrett et al., KIF20A in cytokinesis and cancer (2019)](https://pubmed.ncbi.nlm.nih.gov/30655565/)
[Mitsudome et al., KIF20A regulates hematopoietic stem cell function (2018)](https://pubmed.ncbi.nlm.nih.gov/29453442/)
[Yu et al., KIF20A in golgi apparatus organization (2016)](https://pubmed.ncbi.nlm.nih.gov/27058301/)
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