Recql4 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.
Recql4 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.
Overview
Mermaid diagram (expand to render)
RECQL4 is a DNA helicase belonging to the RecQ family, which also includes BLM, WRN, and RECQL1. The protein possesses ATP-dependent 3'->5' helicase activity and plays critical roles in DNA replication, repair, and recombination. RECQL4 is essential for genomic stability, and pathogenic variants cause several human diseases characterized by developmental abnormalities and cancer predisposition.
Structure
RECQL4 contains several functional domains:
N-terminal Region: Contains the "RecQ helicase" domain with conserved helicase motifs (I-VI)
C-terminal Region: Contains a Sld2-like domain required for DNA binding
RQC Domain: RecQ helicase conserved region
HRDC Domain: Helicase and RNaseD C-terminal domain
Nuclear Localization Signals (NLS): Two NLS sequences for nuclear import
Mitochondrial Targeting Sequence (MTS): N-terminal sequence for mitochondrial localization
The protein forms hexamers and can unwind various DNA structures including forks, D-loops, and Holliday junctions.
Normal Function
DNA Replication
Stabilizes replication forks and prevents fork collapse
Facilitates replication restart after stalling
Interacts with replication proteins (PCNA, RPA)
DNA Repair
Participates in base excision repair (BER)
Involved in non-homologous end joining (NHEJ)
Contributes to homologous recombination (HR)
Mitochondrial Function
Localizes to mitochondria
Maintains mitochondrial DNA (mtDNA) integrity
Protects against mtDNA damage
Transcription
Modulates transcriptional activity
Associates with RNA polymerase II
Role in Disease
Rothmund-Thomson Syndrome
Pathogenic RECQL4 variants cause autosomal recessive RTS:
Loss of helicase activity leads to genomic instability
Accumulation of DNA damage
Increased cellular senescence
Cancer predisposition (osteosarcoma, skin cancers)
Molecular Mechanisms
Impaired DNA repair capacity
Replication stress
Mitochondrial dysfunction
Accelerated aging phenotype
Therapeutic Targeting
Current therapeutic approaches for RECQL4-related disorders:
DNA Damage Response Modulators: PARP inhibitors being explored
Antioxidants: To reduce oxidative DNA damage
Gene Therapy: Under investigation for delivering functional RECQL4
Key Publications
Wang LL, et al. (2003). "Spectrum of RECQL4 mutations in Rothmund-Thomson syndrome." Hum Mutat 21(3):300. PMID: 12619116(https://pubmed.ncbi.nlm.nih.gov/12619116/)
Croteau DL, et al. (2012). "Human RECQL4: a promising target for anticancer therapy." Curr Pharm Des 18(26):3794-3804. PMID: 22632846(https://pubmed.ncbi.nlm.nih.gov/22632846/)
Shen J, et al. (2013). "RECQL4 and its genomic instability in cancer." Clin Cancer Res 19(9):2355. PMID: 23461901(https://pubmed.ncbi.nlm.nih.gov/23461901/)
[Genomics Instability in Neurodegeneration](/mechanisms/genetics)
See Also
[Proteins/Recql4](/proteins/recql4) — This page
Background
The study of Recql4 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.
External Links
[PubMed](https://pubmed.ncbi.nlm.nih.gov/) - Biomedical literature
[Alzheimer's Disease Neuroimaging Initiative](https://adni.loni.usc.edu/) - Research data
[Allen Brain Atlas](https://brain-map.org/) - Brain gene expression data
References
References
Pathway Diagram
The following diagram shows the key molecular relationships involving RECQL4 Protein discovered through SciDEX knowledge graph analysis: