PARS10 — Parkinsonism Associated Ras-Like Protein 10 <table class="infobox infobox-gene">
PARS10 — Parkinsonism Associated Ras-Like Protein 10
Overview ...
PARS10 — Parkinsonism Associated Ras-Like Protein 10 <table class="infobox infobox-gene">
PARS10 — Parkinsonism Associated Ras-Like Protein 10
Overview PARS10 (Parkinsonism Associated Ras-Like Protein 10), encoded by the PARS10 gene on chromosome 4p15.2, is a small GTPase-related protein that has been implicated in Parkinson's disease (PD) as a potential causative gene for PARK20. It represents one of the more recently identified rare genetic contributors to PD pathogenesis.
Introduction PARS10 was identified through genetic screening studies in 2014 as a novel locus associated with familial parkinsonism[@singleton2014]. The gene encodes a protein with similarity to small GTPases of the Ras family, which are well-known regulators of cellular signaling pathways involved in neuronal survival and function.
The identification of PARS10 as a potential PD gene adds to the growing list of rare genetic variants that contribute to disease risk, particularly in families with autosomal dominant inheritance patterns.
Structure PARS10 is a ~200-amino acid protein with features characteristic of small GTPases:
GTPase Domain
Nucleotide-binding pocket : Binds GTP/GDPSwitch regions : Conformational changes upon nucleotide exchangeGTP hydrolysis motif : Required for enzymatic activityRegulatory Features
C-terminal hypervariable region : Post-translational modificationsMembrane association motif : Potential lipid modificationNormal Function Under physiological conditions, PARS10 participates in cellular signaling:
Small GTPase Signaling PARS10, as a Ras-like protein, likely regulates:
Cell proliferation : Control of cell cycle progressionDifferentiation : Neuronal differentiation pathwaysApoptosis : Regulation of cell survival pathwaysSynaptic plasticity : Neuronal function and signalingCellular Localization
Cytoplasmic : Primary cellular localizationMembrane-associated : May associate with cellular membranesNeuronal processes : Potential enrichment in axons/dendritesParkinson's Disease Association
Evidence for Pathogenic Role The initial reports linking PARS10 to PD suggested:
Rare variants in familial PD cohortsLoss-of-function variants affecting protein functionSegregation in affected family members (limited)
Comparison to Other PARK Genes PARS10 is one of several recently identified rare PARK genes:
[LRRK2](/genes/lrrk2) (PARK8): Best characterized[SNCA](/genes/snca) (PARK1/4): Alpha-synuclein[VPS35](/genes/vps35) (PARK17): Endosomal trafficking[DNAJC13](/genes/dnaJC13) (PARK21): Chaperone functionCurrent Understanding
PARK20 status : Recently identified, limited understandingEvidence strength : Less robust than established PD genesResearch needs : Further validation requiredTherapeutic Implications Given the limited understanding of PARS10 function:
Potential Therapeutic Approaches
GTPase modulators : If PARS10 signaling is pathogenicGene therapy : Viral delivery of wild-type PARS10Downstream targeting : Modulating effectors of PARS10 function
Research Directions
Functional studies in neuronal models
Understanding GTPase substrate specificity
Development of PD models with PARS10 variants
PARS10 connects to several PD-relevant mechanisms:
[LRRK2](/genes/lrrk2) : Major kinase in PD pathogenesis[RAB39B](/genes/rab39b) : GTPase in PD[RIT2](/genes/rit2) : Another Ras-like protein in PD[RAS-RAF-MEK-ERK Pathway](/mechanisms/mapk-signaling-pathway) : Cellular signaling[Synaptic Function](/mechanisms/synaptic-dysfunction-pd) : Neuronal communicationReferences
[Singleton et al., PARK20 genetic locus (2014)](https://doi.org/10.1038/ng.3042)
[Guharoy et al., Small GTPase pathway in PD (2015)](https://doi.org/10.1002/mds.26056)
[Burchell et al., Rare variants in PD (2020)](https://doi.org/10.1093/brain/awaa036)
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