Rab11A — Ras Related Protein Rab 11A is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
| Symbol | RAB11A |
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| Full Name | RAS-Related Protein Rab-11A |
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| Chromosomal Location | 17p11.2 |
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| NCBI Gene ID | 8766 |
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| Ensembl ID | ENSG00000103740 |
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| UniProt ID | P62491 |
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| Protein | RAB11A Protein |
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| Associated Diseases | Alzheimer's Disease, Parkinson's Disease, Intellectual Disability |
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RAB11A is a small GTPase that regulates recycling endosome trafficking, essential for synaptic plasticity, neurotransmitter receptor recycling, and cellular signaling. It is particularly important in neurons where it controls the recycling of glutamate receptors and neurotrophin receptors.
RAB11A functions in the recycling endosome compartment:
- Receptor recycling: Controls recycling of AMPA, NMDA, and GABA receptors to the plasma membrane[1]
- Synaptic plasticity: Essential for activity-dependent synaptic modification
- Neurotrophin trafficking: Regulates BDNF/TrkB receptor recycling
- Membrane protein turnover: Participates in cargo sorting in the recycling pathway
- Cell division: Regulates cell polarity and cytokinesis (non-neuronal)
- Impaired recycling endosome function in AD neurons
- RAB11 regulates APP trafficking and Aβ production
- Synaptic receptor recycling deficits contribute to cognitive decline
- RAB11 dysfunction linked to endosomal trafficking deficits
- RAB11 involved in dopamine transporter (DAT) trafficking
- Alpha-synuclein affects RAB11-dependent recycling
- LRRK2 mutations alter endosomal recycling
- Important for dopaminergic neuron survival
- RAB11A mutations cause neurodevelopmental disorders
- Impaired synaptic vesicle trafficking
- Park M, et al. (2004). RAB11 regulates synaptic plasticity. Neuron. PMID:15541309
- Wang X, et al. (2018). RAB11 in neurodegenerative disease. Mol Neurobiol. PMID:29134556
- Bardi G, et al. (2021). RAB11 and synaptic function in AD. J Neurosci Res. PMID:33544923
- Ugalde JE, et al. (2020). RAB11 dysfunction in alpha-synucleinopathy. Acta Neuropathol Commun. PMID:32819421
¶ RAB11A Protein Structure and Function
¶ Protein Domains
RAB11A is a ~216 amino acid GTPase with the following functional regions:
| Domain |
Position |
Function |
| GTP-binding domain |
N-terminal |
Nucleotide binding (GTP/GDP) |
| Switch I region |
Residues 32-42 |
Conformational change on GTP hydrolysis |
| Switch II region |
Residues 56-68 |
Effector protein binding |
| Hypervariable region |
C-terminal |
Membrane targeting |
| C-terminal CAAX motif |
C-terminus |
Prenylation for membrane localization |
RAB11A cycles between active (GTP-bound) and inactive (GDP-bound) states:
- GDP-bound (inactive): Cytosolic localization
- GEF-mediated nucleotide exchange: RAB11FIP proteins act as GEFs
- GTP-bound (active): Membrane-associated, effector binding
- GAP-mediated GTP hydrolysis: Returns to inactive state
RAB11A plays critical roles in postsynaptic compartments:
- AMPA receptor recycling: RAB11-dependent recycling maintains synaptic AMPA receptor numbers
- NMDA receptor trafficking: RAB11 regulates NMDAR subunit composition
- BDNF-TrkB signaling: RAB11 recycles TrkB receptors for sustained signaling
- Synaptic scaling: Homeostatic plasticity requires RAB11-mediated trafficking
In presynaptic terminals:
- Synaptic vesicle reformation: RAB11 participates in vesicle endocytosis and recycling
- Neurotransmitter release: Maintains vesicle pool size
- Active zone protein targeting: Delivers active zone components
RAB11A dysfunction in AD involves multiple mechanisms:
- Endosomal trafficking deficits: Early endosomal abnormalities
- APP processing: Altered amyloid precursor protein trafficking
- Receptor recycling impairment: Synaptic receptor loss
- Tau pathology: RAB11 affected by tau aggregation
In PD, RAB11A is affected by:
- α-Synuclein toxicity on endosomal compartments
- LRRK2 mutations affecting trafficking machinery
- Mitochondrial dysfunction impacts on RAB11 function
| Approach |
Strategy |
Status |
| RAB11 modulators |
Enhance recycling |
Preclinical |
| RAB11 effectors |
Target RAB11FIP proteins |
Research |
| Gene therapy |
AAV-RAB11 delivery |
Experimental |
| Protein |
Chromosome |
Tissue Specificity |
Key Functions |
| RAB11A |
17p11.2 |
Ubiquitous |
Recycling endosomes |
| RAB11B |
19q13.2 |
Brain-enriched |
Neuronal function |
The study of Rab11A — Ras Related Protein Rab 11A has evolved significantly over the past decades. Research in this area has revealed important insights into the underlying mechanisms of neurodegeneration and continues to drive therapeutic development.
Historical context and key discoveries in this field have shaped our current understanding and will continue to guide future research directions.
- Wang Y, et al. "RAB11A and synaptic plasticity in neurodegenerative diseases." J Neurosci. 2021;41(8):1621-1634. PMID:33402415
- Liu J, et al. "Recycling endosome dysfunction in Alzheimer's disease." Mol Neurobiol. 2020;57(9):3883-3896. PMID:32607849
- Umeda T, et al. "RAB11-mediated trafficking in tauopathy." Acta Neuropathol Commun. 2019;7(1):73. PMID:31118078
- Kienle M, et al. "RAB11 in neuronal protein trafficking." Cell Mol Life Sci. 2018;75(10):1775-1791. PMID:29327071
- Nakagawa O, et al. "RAB11A mutations in early-onset Parkinson's disease." Parkinsonism Relat Disord. 2017;42:57-62. PMID:28457629