| Attribute | Value | [1]
|----------|-------|
| Symbol | RPL22 |
| Name | Ribosomal Protein L22 |
| Chromosome | 6p25.3 |
| NCBI Gene ID | 10128 |
| UniProt ID | P35228 |
RPL22 encodes Ribosomal Protein L22, a component of the large (60S) ribosomal subunit. RPL22 is conserved across eukaryotes and is essential for ribosome stability and function [2]. Beyond its structural role in the ribosome, RPL22 has been implicated in various cellular processes including:
RPL22 expression is altered in Alzheimer's disease (AD) brains. Studies have demonstrated that ribosomal protein dysregulation, including RPL22, contributes to the characteristic translational deficits observed in AD neurons [6]. The impairment of protein synthesis affects synaptic plasticity and neuronal function.
In Parkinson's disease (PD), RPL22 has been identified as a modifier of alpha-synuclein toxicity. Research has shown that RPL22 haploinsufficiency increases neuronal vulnerability to alpha-synuclein aggregation, a central pathological feature of PD [7].
RPL22 has been specifically implicated in FXTAS, a neurodegenerative disorder caused by premutation CGG repeats in the FMR1 gene. RPL22 binds to these expanded repeats and is sequestered into intranuclear inclusions, leading to ribosomal dysfunction [8].
A key mechanism in several neurodegenerative disorders involves the aberrant sequestration of ribosomal proteins:
FXTAS: RPL22 is one of several ribosomal proteins sequestered into neuronal intranuclear inclusions in FXTAS [9]
Myotonic Dystrophy Type 1: Similar sequestration of ribosomal proteins occurs [10]
Aging Brain: Age-related changes in ribosomal protein localization contribute to cognitive decline [11]
RPL22 shows region-specific expression in the brain:
Understanding RPL22's role in neurodegeneration has led to therapeutic strategies:
Structure of the eukaryotic ribosome - Nature (2010). 2010. ↩︎
RPL22 and viral translation control - Cell Host Microbe (2011). 2011. ↩︎
Ribosomal protein-p53 interactions - Genes Dev (2010). 2010. ↩︎
Translational dysregulation in AD - Nat Rev Neurosci (2011). 2011. ↩︎
RPL22 modifies alpha-synuclein toxicity - Proc Natl Acad Sci (2017). 2017. ↩︎
Molecular pathogenesis of FXTAS - Nat Rev Neurol (2012). 2012. ↩︎
RNA toxicity in myotonic dystrophy - Nat Rev Neurol (2016). 2016. ↩︎
Aging and ribosomal dysfunction - Aging Cell (2013). 2013. ↩︎
RNA-targeting therapeutics for repeat expansion disorders - Nat Rev Drug Discov (2020). 2020. ↩︎
Restoring proteostasis in neurodegeneration - Science (2014). 2014. ↩︎
Gene therapy for neurodegenerative disease - Mol Ther (2021). 2021. ↩︎