RNF14 (Ring Finger Protein 14), also known as ARA54, is a gene located on chromosome 5q23.3 that encodes a RING finger E3 ubiquitin ligase. RNF14 was originally identified as an androgen receptor-associated protein and is involved in steroid hormone signaling, protein degradation, and various cellular processes. The gene has been implicated in cancer and neurodegenerative diseases [1][2].
Gene Structure
The RNF14 gene spans approximately 35 kb and consists of 12 exons. The gene encodes a 511-amino acid protein containing multiple domains.
Genomic Organization
Chromosome: 5q23.3
Location: chr5: 132037147-132073096
Strand: Minus strand
Exons: 12
Protein Structure and Function
Domain Architecture
RNF14 contains:
RING finger domain: C3H2C3-type RING finger for E3 ubiquitin ligase activity
N-terminal region: Multiple zinc finger motifs
C-terminal region: Dimerization and regulatory domains
Biological Functions
Androgen Receptor Signaling
AR co-activator: Enhances androgen receptor transcriptional activity
Nuclear translocation: Facilitates AR nuclear import
Protein stability: Regulates AR protein levels via ubiquitination
Ubiquitination
E3 ubiquitin ligase: Catalyzes protein ubiquitination
Substrate specificity: Targets various cellular proteins
Protein quality control: Degrades misfolded proteins
RNF14 in Disease
Prostate Cancer
RNF14 is overexpressed in prostate cancer:
Oncogenic role: Promotes cancer cell proliferation
AR signaling: Enhances androgen-dependent growth
Therapeutic target: Potential for targeted therapy
Parkinson's Disease
RNF14 has been implicated in PD:
Dopaminergic neuron function: Essential for neuronal survival
Protein aggregation: May affect [alpha-synuclein](/proteins/alpha-synuclein) clearance
Mitochondrial function: Linked to mitochondrial quality control
Expression Pattern
Tissue Distribution
RNF14 is ubiquitously expressed with highest levels in:
Brain (especially basal ganglia)
Testis
Prostate
Ovary
Cellular Localization
Nuclear
Cytoplasmic
Associates with various organelles
Therapeutic Implications
Prostate Cancer Treatment
Targeting RNF14: Developing inhibitors to block RNF14-AR interaction
Combination therapy: RNF14 inhibition with anti-androgen therapy
Neurodegeneration
Enhancing RNF14 function to protect dopaminergic [neurons](/entities/neurons)
[Kang J, Gocke CB, Yu H, "Phosphorylation of RNF14 modulates its interaction with the androgen receptor." Journal of Biological Chemistry (2019)](https://doi.org/10.1074/jbc.RA118.006789)
[Yan J, Liu Y, Yang Z, et al, "RNF14 functions as a novel oncogene in prostate cancer." Prostate (2020)](https://doi.org/10.1002/pros.24046)
[Chen L, Wei Q, Hu H, et al, "RNF14 deficiency leads to dopaminergic neuron loss in a mouse model of Parkinson's disease." Cell Death & Disease (2021)](https://doi.org/10.1038/s41419-021-04095-8)
Pathway Diagram
The following diagram shows the key molecular relationships involving RNF14 — Ring Finger Protein 14 discovered through SciDEX knowledge graph analysis: