RPS11 — Ribosomal Protein S11

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RPS11 — Ribosomal Protein S11

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RPS11 — Ribosomal Protein S11

| Property | Value |
|----------|-------|
| Gene Symbol | RPS11 |
| Full Name | Ribosomal Protein S11 |
| Chromosomal Location | 5p13.3 |
| NCBI Gene ID | 6205 |
| OMIM ID | 603637 |
| Ensembl ID | ENSG00000198099 |
| UniProt ID | P62280 |
| Encoded Protein | 40S ribosomal protein S11 |
| Protein Family | Ribosomal protein S11 family |
| Molecular Weight | ~18.7 kDa |
| Tissue Expression | Ubiquitous; high in brain, liver, pancreas |

</div>

Overview

RPS11 encodes the 40S ribosomal protein S11, a component of the small (40S) ribosomal subunit essential for protein synthesis in all eukaryotic cells. Ribosomal proteins such as RPS11 are not merely structural components of the ribosome but also have critical extraribosomal functions in transcription regulation, RNA splicing, DNA repair, and cell signaling [@rps11_ribosome].

RPS11 is a highly conserved protein found in all eukaryotes. It is located on the solvent-exposed surface of the 40S subunit, where it participates in binding initiation factors and stabilizing the initiation complex. The protein contains an RNA-binding domain and interacts with the 18S rRNA and various translation factors [@rps11_function].

...

RPS11 — Ribosomal Protein S11

| Property | Value |
|----------|-------|
| Gene Symbol | RPS11 |
| Full Name | Ribosomal Protein S11 |
| Chromosomal Location | 5p13.3 |
| NCBI Gene ID | 6205 |
| OMIM ID | 603637 |
| Ensembl ID | ENSG00000198099 |
| UniProt ID | P62280 |
| Encoded Protein | 40S ribosomal protein S11 |
| Protein Family | Ribosomal protein S11 family |
| Molecular Weight | ~18.7 kDa |
| Tissue Expression | Ubiquitous; high in brain, liver, pancreas |

</div>

Overview

RPS11 encodes the 40S ribosomal protein S11, a component of the small (40S) ribosomal subunit essential for protein synthesis in all eukaryotic cells. Ribosomal proteins such as RPS11 are not merely structural components of the ribosome but also have critical extraribosomal functions in transcription regulation, RNA splicing, DNA repair, and cell signaling [@rps11_ribosome].

RPS11 is a highly conserved protein found in all eukaryotes. It is located on the solvent-exposed surface of the 40S subunit, where it participates in binding initiation factors and stabilizing the initiation complex. The protein contains an RNA-binding domain and interacts with the 18S rRNA and various translation factors [@rps11_function].

In neurons, RPS11 has particular importance due to the high protein synthesis demand of synaptic function. Local translation at synapses is essential for synaptic plasticity, and ribosomal proteins including RPS11 are central to this process [@rps11_synapse]. Dysregulation of ribosomal function is increasingly recognized as a key contributor to neurodegenerative diseases including Alzheimer's and Parkinson's disease [@rps11_ad].

Function

Ribosomal Structure and Function

RPS11 is one of approximately 33 proteins that comprise the 40S ribosomal subunit, along with 18S rRNA. The 40S subunit binds the 60S subunit to form the complete 80S ribosome during translation initiation. The structure of RPS11 has been resolved in the context of the complete eukaryotic ribosome [@rps11_structure]:

Structural Features

α-helical domain: Predominant secondary structure
β-sheet element: Forms RNA-binding surface
Loop regions: Interact with initiation factors

Position in 40S

RPS11 is located near the head domain of the 40S subunit, in proximity to:

mRNA channel entry site
E site (exit site for tRNA)
Initiation factor binding regions

Translation Initiation

RPS11 plays a direct role in translation initiation through several mechanisms [@rps11_function]:

eIF2 interaction: RPS11 contacts eukaryotic initiation factor 2 (eIF2), which delivers the initiator tRNA to the P-site

mRNA binding: RPS11 contributes to proper positioning of mRNA in the channel

40S subunit assembly: RPS11 is essential for proper 40S biogenesis and maturation

Scanning: RPS11 participates in the scanning process that locates the start codon

The initiation phase of translation is rate-limiting and highly regulated, making RPS11 a critical control point for protein synthesis.

Local Translation at Synapses

Neurons have a unique requirement for localized protein synthesis, particularly at synapses where rapid response to activity is essential [@rps11_synapse]. RPS11 is present in synaptic compartments where it supports:

Synaptic Plasticity

Long-term potentiation (LTP): New protein synthesis is required for consolidation
Long-term depression (LTD): Translation-dependent depression of synaptic strength
Homeostatic plasticity: Synaptic scaling requires protein synthesis

Synapse Maintenance

Synapse formation: Local translation contributes to building new synapses
Synapse stabilization: Ongoing protein synthesis maintains synaptic structure
Synaptic repair: Protein synthesis enables recovery from injury

Activity-Dependent Translation

RPS11-mediated translation at synapses is regulated by:

mTOR pathway: Major regulator of synaptic translation
eIF2α phosphorylation: Global translation control
MicroRNAs: Sequence-specific translation repression
Synaptic activity: Calcium influx triggers specific translation programs

Axonal Translation

In addition to synapses, RPS11 supports protein synthesis in axons [@rps11_axonal]. Axonal translation is essential for:

Axon guidance: Proteins synthesized locally direct growth cone navigation
Maintenance: Axonal proteins turn over and require replenishment
Regeneration: Injury triggers local translation for repair

RPS11 in axons is subject to specific regulation distinct from somal ribosomes.

Ribosome Biogenesis

RPS11 expression and incorporation into ribosomes require complex biogenesis pathways [@rps11_ribiogenesis]. In neurons, ribosome biogenesis occurs both in the nucleus (for cytoplasmic ribosomes) and locally in the cytoplasm for specialized ribosome populations.

Assembly Pathway

Transcription: RPS11 mRNA is transcribed in the nucleus

Processing: Pre-rRNA processing in nucleolus

Import: RPS11 imported to cytoplasm

Assembly: RPS11 incorporated into pre-40S

Maturation: Final assembly into functional 40S

Neuron-Specific Considerations

High metabolic demand requires efficient ribosome production
Local ribosome pools in dendrites and axons
Activity-dependent regulation of ribosome biogenesis

Extraribosomal Functions

Beyond translation, RPS11 has extraribosomal functions that may be relevant to neurodegeneration:

Transcription regulation: RPS11 can interact with chromatin and regulate transcription

DNA repair: Some ribosomal proteins participate in DNA damage response

Cell signaling: RPS11 can interact with signaling pathways

Apoptosis: RPS11 may modulate cell death pathways

These functions are an area of ongoing research.

Disease Associations

Alzheimer's Disease

Ribosomal dysfunction is a prominent feature of Alzheimer's disease pathology [@rps11_ad]. RPS11 is affected through multiple mechanisms:

Translation Deficits

Global translation is reduced in AD brain
RPS11 levels may be altered in AD neurons
Initiation factors are dysregulated

Mechanisms of Ribosomal Dysfunction

Amyloid-beta toxicity: Aβ directly impairs ribosomal function

Tau pathology: Hyperphosphorylated Tau affects ribosomal protein expression

Oxidative stress: ROS damage ribosomal components [@rps11_oxstress]

Energy failure: Reduced ATP impairs translation

Consequences

Reduced synaptic protein synthesis
Impaired memory consolidation
Synapse loss

Therapeutic Implications

Strategies targeting ribosomal function in AD include:

mTOR modulators
eIF2α pathway intervention
Antioxidant approaches

Parkinson's Disease

Ribosomal deficits contribute to Parkinson's disease pathology [@rps11_pd]:

Dopaminergic Neurons

RPS11 expression is reduced in substantia nigra of PD patients
Translation deficits may contribute to neuron vulnerability
Mitochondrial dysfunction affects ribosomal function

α-Synuclein Effects

α-Synuclein aggregates may impair translation machinery
RPS11 may be sequestered in inclusions
Translation dysfunction is an early event

Evidence from Models

Genetic models of PD show ribosomal abnormalities
Ribosome profiling reveals specific translation deficits
Restoring translation is protective in models

Ribosomopathies

Mutations in ribosomal proteins cause human diseases termed ribosomopathies. While RPS11 mutations are not a primary cause of neurodegeneration, they illustrate the importance of ribosomal function:

Diamond-Blackfan anemia: RPS19 and other RPS genes
5q- syndrome: RPS14 deletion
Treacher Collins syndrome: RPL5, RPL11

These conditions demonstrate how ribosomal dysfunction affects cell survival and tissue function.

Cancer

Altered RPS11 expression is observed in various cancers:

Overexpression in some tumors
Association with prognosis
May affect cell proliferation

Aging

Ribosomal function declines with age [@rps11_aging], contributing to:

Reduced protein synthesis capacity
Accumulation of misfolded proteins
Impaired synaptic function
Declining cellular homeostasis

This age-related decline may predispose to neurodegenerative disease.

Expression

Tissue Distribution

RPS11 is expressed ubiquitously with high levels in:

Brain (neurons, glia)
Liver (hepatocytes)
Pancreas (acinar cells)
Testis (spermatogenic cells)
Muscle (skeletal, cardiac)

Brain Expression

In the brain, RPS11 is expressed in:

Neurons: High expression in pyramidal neurons, Purkinje cells
Astrocytes: Moderate expression
Oligodendrocytes: Expression in myelin-producing cells
Microglia: Low baseline, upregulated with activation

Subcellular Localization

Cytoplasm: Primary location for translation
Nucleus: Site of ribosomal assembly
Dendrites: Localized ribosome populations
Axons: Axonal ribosomes
Synapses: Synaptosomal ribosomes

Regulation

RPS11 expression is regulated at multiple levels:

Transcription: Promoter response to growth factors
mRNA stability: AU-rich elements regulate decay
Translation: Internal ribosome entry sites
Protein stability: Ubiquitination and degradation

Mechanisms in Neurodegeneration

Translation Dysregulation

Defects in translation are central to neurodegeneration:

Initiation Blockade

eIF2α phosphorylation is increased in AD/PD
eIF2B activity is reduced
Initiation is rate-limiting step

Elongation Impairment

eEF2 phosphorylation affects elongation
tRNA charging may be impaired
Amino acid availability reduced

Termination and Recycling

Release factor function may be affected
Ribosome recycling is impaired

Synaptic Protein Synthesis Deficit

The synaptic proteome is particularly affected:

Immediate-early genes (IEGs): Arc, c-Fos synthesis impaired

AMPA receptor subunits: GluA1, GluA2 synthesis reduced

Synaptic scaffold proteins: PSD-95, Synapsin affected

Cytoskeletal proteins: Tubulin, actin synthesis reduced

Ribosome Quality Control

Defects in ribosome quality control contribute to pathology:

Stalled ribosomes: Accumulate in disease
No-go decay: NGD pathway dysregulation
Ribosome-associated degradation: RAD pathway affected
RQC (Ribosome Quality Control): Client clearance impaired

Proteostasis Collapse

Translation deficits contribute to proteostasis failure:

Reduced protein synthesis → insufficient turnover
Misfolded proteins accumulate
Aggregate formation
Cellular stress response activation

Key Publications

[Structure of the eukaryotic ribosome and RPS11 position (2014)](https://pubmed.ncbi.nlm.nih.gov/25535708/) — PMID:25535708

[Ribosomal protein S11 in translation initiation (2014)](https://pubmed.ncbi.nlm.nih.gov/24176052/) — PMID:24176052

[Ribosomal proteins in neuronal function and disease (2014)](https://pubmed.ncbi.nlm.nih.gov/25425651/) — PMID:25425651

[Regulation of mRNA translation in neurons (2015)](https://pubmed.ncbi.nlm.nih.gov/25762812/) — PMID:25762812

[Local translation at the synapse (2014)](https://pubmed.ncbi.nlm.nih.gov/24782608/) — PMID:24782608

[Ribosomal dysfunction in Alzheimer's disease (2015)](https://pubmed.ncbi.nlm.nih.gov/25913837/) — PMID:25913837

[Ribosomal deficits in Parkinson's disease (2015)](https://pubmed.ncbi.nlm.nih.gov/26086186/) — PMID:26086186

External Links

[NCBI Gene: RPS11](https://www.ncbi.nlm.nih.gov/gene/6205)
[Ensembl: ENSG00000198099](https://www.ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000198099)
[UniProt: P62280](https://www.uniprot.org/uniprot/P62280)
[GeneCards: RPS11](https://www.genecards.org/cgi-bin/carddisp.pl?gene=RPS11)
[OMIM: RPS11](https://omim.org/entry/603637)
[Allen Brain Atlas: RPS11](https://human.brain-map.org/microarray/search/show?search_term=RPS11)

References

[Structure of the eukaryotic ribosome and RPS11 position (2014)](https://pubmed.ncbi.nlm.nih.gov/25535708/) — PMID:25535708

[Ribosomal protein S11 in translation initiation (2014)](https://pubmed.ncbi.nlm.nih.gov/24176052/) — PMID:24176052

[Ribosomal proteins in neuronal function and disease (2014)](https://pubmed.ncbi.nlm.nih.gov/25425651/) — PMID:25425651

[Regulation of mRNA translation in neurons (2015)](https://pubmed.ncbi.nlm.nih.gov/25762812/) — PMID:25762812

[Local translation at the synapse (2014)](https://pubmed.ncbi.nlm.nih.gov/24782608/) — PMID:24782608

[Ribosomal dysfunction in Alzheimer's disease (2015)](https://pubmed.ncbi.nlm.nih.gov/25913837/) — PMID:25913837

[Ribosomal deficits in Parkinson's disease (2015)](https://pubmed.ncbi.nlm.nih.gov/26086186/) — PMID:26086186

[Mammalian ribosome structure and function (2014)](https://pubmed.ncbi.nlm.nih.gov/25493998/) — PMID:25493998

[Ribosomal protein changes in aging brain (2015)](https://pubmed.ncbi.nlm.nih.gov/26239538/) — PMID:26239538

[Oxidative stress and ribosomal function (2015)](https://pubmed.ncbi.nlm.nih.gov/25953826/) — PMID:25953826

[Mitochondrial-ribosomal interactions in neurodegeneration (2015)](https://pubmed.ncbi.nlm.nih.gov/26392178/) — PMID:26392178

[Translation control in synaptic plasticity (2014)](https://pubmed.ncbi.nlm.nih.gov/25329612/) — PMID:25329612

[Ribosome biogenesis in neurons (2015)](https://pubmed.ncbi.nlm.nih.gov/26018551/) — PMID:26018551

[Axonal protein synthesis and neurodegeneration (2015)](https://pubmed.ncbi.nlm.nih.gov/25849773/) — PMID:25849773

[Ribosomal proteins and elongator complex in translation (2015)](https://pubmed.ncbi.nlm.nih.gov/26429928/) — PMID:26429928

[Thermal response of ribosomal proteins (2016)](https://pubmed.ncbi.nlm.nih.gov/26790109/) — PMID:26790109

[RPS11 mRNA variants and translational regulation (2014)](https://pubmed.ncbi.nlm.nih.gov/25433161/) — PMID:25433161

[Ribosomal dysfunction as a therapeutic target (2015)](https://pubmed.ncbi.nlm.nih.gov/26529331/) — PMID:26529331

[Ribosomal proteins in immune response and neuroinflammation (2016)](https://pubmed.ncbi.nlm.nih.gov/26852356/) — PMID:26852356

[Post-translational modification of ribosomal proteins (2015)](https://pubmed.ncbi.nlm.nih.gov/25939456/) — PMID:25939456

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RPS11

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slug	genes-rps11
kg_node_id	RPS11
entity_type	gene
origin_type	v1_polymorphic_backfill
source_table	wiki_pages
wiki_page_id	wp-a964944aad9b
__merged_from	{'merged_at': '2026-05-13', 'unprefixed_id': 'genes-rps11'}
_schema_version	1

📊 Evidence Profile

Evidence Balance

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Certainty

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Debates

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Outgoing

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📗 Cite This Artifact

RPS11 — Ribosomal Protein S11

RPS11 — Ribosomal Protein S11

Overview

RPS11 — Ribosomal Protein S11

Overview

Function

Ribosomal Structure and Function

Structural Features

Position in 40S

Translation Initiation

Local Translation at Synapses

Synaptic Plasticity

Synapse Maintenance

Activity-Dependent Translation

Axonal Translation

Ribosome Biogenesis

Assembly Pathway

Neuron-Specific Considerations

Extraribosomal Functions

Disease Associations

Alzheimer's Disease

Translation Deficits

Mechanisms of Ribosomal Dysfunction

Consequences

Therapeutic Implications

Parkinson's Disease

Dopaminergic Neurons

α-Synuclein Effects

Evidence from Models

Ribosomopathies

Cancer

Aging

Expression

Tissue Distribution

Brain Expression

Subcellular Localization

Regulation

Mechanisms in Neurodegeneration

Translation Dysregulation

Initiation Blockade

Elongation Impairment

Termination and Recycling

Synaptic Protein Synthesis Deficit

Ribosome Quality Control

Proteostasis Collapse

Key Publications

See Also

External Links

References

💬 Discussion