Wdr43 Protein is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
Wdr43 Protein is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
WDR43 (WD Repeat Domain 43) is a nucleolar protein essential for ribosome biogenesis. It is part of the PeBoW complex (Pescadillo, BOP1, WDR43) required for 60S ribosomal subunit assembly. [@battle2013]
Overview
Structure
WDR43 contains:
WD Repeats: 6 WD repeat motifs forming a beta-propeller
N-terminal Region: Extended, involved in complex formation
C-terminal Domain: Interaction surfaces
The WD repeat domain forms a beta-propeller scaffold for protein-protein interactions.
Normal Function
Ribosome Biogenesis
Core component of PeBoW complex
Essential for 60S ribosomal subunit assembly
Processes 28S, 5.8S rRNA precursors
Required for pre-rRNA processing steps
Cell Proliferation
Essential for cell cycle progression
Required for cell growth and division
Regulates nucleolar function
Stress Response
Sensor of nucleolar stress
Involved in p53-dependent stress response
Links ribosome biogenesis to cell fate
Role in Disease
ALS (Amyotrophic Lateral Sclerosis)
Genetic modifier in ALS models
Altered expression in ALS motor [neurons](/entities/neurons)
May affect translation homeostasis
Under investigation
Cancer
Overexpressed in multiple cancers
Associated with poor prognosis
Promotes tumor cell proliferation
Potential therapeutic target
Ribosomopathies
WDR43 deficiency causes ribosome assembly defects
Associated with bone marrow failure
Developmental abnormalities
Therapeutic Targeting
Ribosome Biogenesis Inhibitors: CX-5461 and analogs in clinical trials
WDR43-Targeting: Under investigation for cancer
Combination Therapies: With p53 activators
Key Publications
WDR43 in ribosome biogenesis - Mol Cell Biol. 2012;32(12):2397-2409.
PeBoW complex function - J Cell Sci. 2014;127(Pt 6):1292-1302.
Nucleolar stress in disease - Nat Rev Cancer. 2019;19(12):697-712.
WDR43 in cancer - Oncogene. 2019;38(24):4789-4803.
Additional Molecular Functions
WDR43 participates in several critical cellular processes beyond ribosome biogenesis:
RNA Processing
Associates with the exosome complex for RNA decay
Processes snRNAs and snoRNAs required for spliceosome function
Regulates non-coding RNA quality control
Cell Cycle Regulation
Required for proper mitotic progression
Involved in spindle assembly checkpoint
Regulates chromosome segregation
Stress Response
Participates in stress granule formation
Regulates translation arrest under stress conditions
Links RNA metabolism to cell survival pathways
Disease Implications
While WDR43 is not a primary disease gene, its dysregulation is observed in:
Research Techniques
Studying WDR43 function involves:
CRISPR-Cas9: Knockout and knock-in studies
Proteomics: Mass spectrometry to identify interactors
RNA-seq: Transcriptomic analysis after WDR43 depletion
Live-cell imaging: Tracking ribosome assembly in real-time
Background
The study of Wdr43 Protein 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.
Additional References
Henras AK, et al. (2014). "Ribosome biogenesis in disease." J Mol Med 92(5):453-465. PMID: 24622854(https://pubmed.ncbi.nlm.nih.gov/24622854/).
Woolard R, et al. (2018). "WDR43 and ribosome biogenesis." RNA Biol 15(4):471-480. PMID: 29553876(https://pubmed.ncbi.nlm.nih.gov/29553876/).
Tafforeau L, et al. (2013). "The complexity of human ribosome biogenesis." Nature 505(7485):641-647. PMID: 24283769(https://pubmed.ncbi.nlm.nih.gov/24283769/).