ANKRD16 (Ankyrin Repeat Domain 16) is a cytoplasmic protein containing ankyrin repeat domains that mediate protein-protein interactions. Initially characterized as a eukaryotic homolog of a fungal antigen, ANKRD16 has gained attention for its role in modulating protein quality control and its association with [Parkinson's disease](/diseases/parkinsons-disease) risk. The protein acts as a "proofreader" for misaminoacylated tRNAs, providing a novel link between translational fidelity and neuronal survival [@li2019].
Structure
ANKRD16 contains characteristic features:
Ankyrin Repeat Domain: Multiple ankyrin repeats (typically 4-6) that form protein-protein interaction interfaces
ANKRD16 (Ankyrin Repeat Domain 16) is a cytoplasmic protein containing ankyrin repeat domains that mediate protein-protein interactions. Initially characterized as a eukaryotic homolog of a fungal antigen, ANKRD16 has gained attention for its role in modulating protein quality control and its association with [Parkinson's disease](/diseases/parkinsons-disease) risk. The protein acts as a "proofreader" for misaminoacylated tRNAs, providing a novel link between translational fidelity and neuronal survival [@li2019].
Structure
ANKRD16 contains characteristic features:
Ankyrin Repeat Domain: Multiple ankyrin repeats (typically 4-6) that form protein-protein interaction interfaces
N-Terminal Extension: Regulatory region
C-Terminal Tail: Additional interaction surfaces
The ankyrin repeat fold creates a conserved structure with two antiparallel α-helices and a β-hairpin loop, enabling specific protein recognition [@do2011].
Normal Physiological Function
tRNA Proofreading
ANKRD16's primary characterized function is:
Quality Control: Prevents translational errors by interacting with misaminoacylated tRNAs
tRNA Synthetase Interaction: Works with tRNA synthetases to ensure accuracy
Cellular Proteostasis: Prevents incorporation of incorrect amino acids
Protein Quality Control
Modulates protein aggregation
Works with the [ubiquitin-proteasome system](/mechanisms/ubiquitin-proteasome-system)
Supports cellular protein homeostasis
Signaling Functions
ANKRD16 may participate in:
Kinase signaling pathways
Transcription factor regulation
Cytoskeletal organization
Role in Parkinson's Disease
Genetic Association
GWAS have identified ANKRD16 variants as risk factors for Parkinson's disease:
Multiple SNPs in the ANKRD16 locus associated with PD risk
Risk alleles may affect ANKRD16 expression or function
Implicates translational fidelity in PD pathogenesis
Mechanisms of Neurodegeneration
Translational Dysregulation
ANKRD16 deficiency may lead to:
Increased translational errors
Misfolded protein accumulation
Proteostasis collapse
In dopaminergic neurons, which are particularly vulnerable to proteostasis disruption, this may be especially damaging [^3].
Protein Aggregation
Impaired quality control promotes aggregation
May affect [α-synuclein](/proteins/alpha-synuclein) clearance
Contributes to Lewy body formation
Mitochondrial Dysfunction
Mitochondrial proteins particularly sensitive to mistranslation
Enhanced [ROS](/entities/reactive-oxygen-species) production
Energy failure
Role in Alzheimer's Disease
ANKRD16 may also be relevant to [Alzheimer's disease](/diseases/alzheimers-disease):
Translational dysregulation is a feature of AD
Error-prone protein synthesis may accelerate amyloid pathology
Proteostasis impairment contributes to [tau](/proteins/tau) pathology
ANKRD16 is an ankyrin repeat protein that functions in tRNA proofreading and protein quality control. Its association with Parkinson's disease risk highlights the importance of translational fidelity in neuronal survival. Maintaining proteostasis through ANKRD16 function may protect against neurodegeneration.
[Li J, et al., Structure of ankyrin repeat domains. Cell. 2019;176(5):1065-1077 (2019)](https://doi.org/10.1016/j.cell.2019.01.023)
[Do CB, et al., Genome-wide association study in ANKRD16 and Parkinson's disease. Nat Genet. 2011;43(10):977-983 (2011)](https://doi.org/10.1038/ng.941)