RIPK3 Gene
Introduction <table class="infobox infobox-gene">Symbol </td>Full Name </td>Chromosomal Location </td>NCBI Gene ID </td>OMIM ID </td>Ensembl ID </td>UniProt ID </td>Protein Size </td>Molecular Weight </td>Nec-1 (Necrostatin-1) </td>GSK'872 </td>Deguelin </td>Anti-RIPK3 antibodies </td>
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RIPK3 Gene
Introduction <table class="infobox infobox-gene">Symbol </td>Full Name </td>Chromosomal Location </td>NCBI Gene ID </td>OMIM ID </td>Ensembl ID </td>UniProt ID </td>Protein Size </td>Molecular Weight </td>Nec-1 (Necrostatin-1) </td>GSK'872 </td>Deguelin </td>Anti-RIPK3 antibodies </td>
The RIPK3 gene (Receptor-Interacting Serine/Threonine-Protein Kinase 3) encodes a critical kinase that mediates necroptosis, a form of programmed cell death distinct from apoptosis. RIPK3 has emerged as an important player in neurodegenerative diseases, where necrotic cell death contributes to disease progression in Alzheimer's disease, Parkinson's disease, amyotrophic lateral sclerosis (ALS), and multiple sclerosis[@degterev2008].
Pathway Diagram
Mermaid diagram (expand to render)
Protein Structure RIPK3 contains several functional domains:
N-terminal Kinase Domain (KD): Serine/threonine kinase activityIntermediate Domain (ID) : RHIM binding interfaceC-terminal Death Domain (DD) : Protein-protein interactionsThe
RHIM (RIP Homotypic Interaction Motif) is critical for interactions with RIPK1 and other RHIM-containing proteins.
Normal Cellular Function
Necroptosis Pathway RIPK3 is the central effector of necroptosis:
Activation : Triggered by TNF family ligands, viral infections, or Toll-like receptor activationRIPK1 Recruitment : Forms necrosome complex with RIPK1 via RHIMMLKL Phosphorylation : RIPK3 phosphorylates MLKL (Mixed Lineage Kinase domain-like), executing necroptosisMembrane Pore Formation : Phosphorylated MLKL translocates to plasma membraneOther Functions
Innate Immunity : Defense against viral infectionsInflammatory Responses : Releases DAMPs (Damage-Associated Molecular Patterns)Development : Required for embryonic development in miceExpression Pattern RIPK3 is expressed in most tissues with notable expression in:
Brain : Neurons, astrocytes, microgliaImmune System : T-cells, B-cells, macrophagesLiver , kidney , heart In the brain, RIPK3 expression increases in response to injury and disease.
Disease Associations
Alzheimer's Disease RIPK3-mediated necroptosis contributes to AD progression[@caccamo2017]:
Neuronal Loss : Necroptosis accounts for progressive neuronal deathNeuroinflammation : RIPK3 activation triggers inflammatory responsesAmyloid and Tau Interaction : Aβ and tau pathology activates RIPK3Therapeutic Target : RIPK3 inhibitors are being exploredParkinson's Disease
Dopaminergic Neuron Death : RIPK3 contributes to death of substantia nigra neuronsMitochondrial Dysfunction : Links to PINK1/Parkin pathwaysNeuroinflammation : Microglial activation via necroptotic signalingAmyotrophic Lateral Sclerosis (ALS)
Motor Neuron Death : RIPK3 activation in motor neuronsAstrocyte Involvement : Astrocyte necroptosis releases toxic factorsTherapeutic Potential : RIPK3 inhibitors show promise in modelsMultiple Sclerosis
Demyelination : Oligodendrocyte necroptosisNeuroinflammation : Immune cell-mediated pathologyTherapeutic Targeting
Signaling Interactions RIPK3 interacts with multiple pathways:
TNF Signaling : Downstream of TNFR1TLR Signaling : Activated by TLR3/4ZBP1/DAI Pathway : DNA virus sensingCaspase-8 : Inhibits necroptosis when activeResearch Highlights
RIPK3 knockout mice are viable but show altered responses to injury
Human post-mortem brain tissue shows increased RIPK3 in AD and PD
Necroptosis inhibitors show neuroprotective effects in animal models
See Also
[Necroptosis Pathway](/mechanisms/necroptosis-pathway)
[RIPK1 Gene](/genes/ripk1)
[MLKL Gene](/genes/mlkl)
[Alzheimer's Disease](/diseases/alzheimers-disease)
[Parkinson's Disease](/diseases/parkinsons-disease)
[Cell Death Pathways](/mechanisms/cell-death-pathways)
[Neuroinflammation](/mechanisms/neuroinflammation)
External Links
[NCBI Gene: RIPK3](https://www.ncbi.nlm.nih.gov/gene/8767)
[UniProt: Q9Y2K6](https://www.uniprot.org/uniprot/Q9Y2K6)
[OMIM: 604466](https://www.omim.org/entry/604466)
[GeneCards: RIPK3](https://www.genecards.org/cgi-bin/carddisp.pl?gene=RIPK3)
References
[Degterev A, et al., Necroptosis and its role in neurodegeneration (2008) (2008)](https://pubmed.ncbi.nlm.nih.gov/18560112/)
[Caccamo A, et al., RIPK3 in Alzheimer's disease (2017) (2017)](https://pubmed.ncbi.nlm.nih.gov/28251280/)
[Ouedraogo M, et al., RIPK3 in Parkinson's disease (2016) (2016)](https://pubmed.ncbi.nlm.nih.gov/27241716/)
[Re DB, et al., Necroptosis in ALS (2014) (2014)](https://pubmed.ncbi.nlm.nih.gov/25240919/)
[Zhang S, et al., Targeting necroptosis in neurodegenerative diseases (2019) (2019)](https://pubmed.ncbi.nlm.nih.gov/31177826/)
Pathway Diagram The following diagram shows the key molecular relationships involving RIPK3 Gene discovered through SciDEX knowledge graph analysis:
Mermaid diagram (expand to render)
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