Genetics of Genome Stability
Genome stability is maintained by DNA repair pathways, cell cycle checkpoints, and telomere maintenance mechanisms. Genetic variants in these systems may influence cancer risk, cellular ageing, and the ability to recover from viral-induced genotoxic stress.
This page is for educational and informational purposes only. Not a diagnostic tool. Always consult a qualified healthcare provider.
What is Genome Stability?
DNA damage from replication errors, oxidative stress, radiation, and viral infection is repaired by multiple pathways: base excision repair (BER), nucleotide excision repair (NER), mismatch repair (MMR), homologous recombination (HR), and non-homologous end joining (NHEJ). Key genome stability genes include BRCA1/2 (HR), TP53 (cell cycle checkpoint), ATM (double-strand break sensing), and PARP1 (single-strand break repair). COVID-19 has been shown to cause DNA damage and impair DNA repair in some cell types. Telomere shortening has been documented in severe COVID-19 and may accelerate biological ageing.
Biological pathways commonly discussed in relation to Genome Stability
Research into Genome Stability, DNA Repair, and Cellular Integrity has highlighted several biological pathways that may be relevant. Genetic variants within these pathways may influence individual susceptibility, symptom severity, or the trajectory of the condition.
Dna Repair
Multiple DNA repair pathways handle different damage types. BER (OGG1, MUTYH) repairs oxidised bases. NER (XPC, ERCC2) removes bulky adducts. MMR (MLH1, MSH2) corrects replication errors. HR (BRCA1/2, RAD51) and NHEJ (XRCC4, LIG4) repair double-strand breaks.
Cell Cycle Checkpoint
TP53 is the most mutated gene in cancer and the central cell cycle checkpoint activator. ATM and CHEK2 kinases phosphorylate TP53 in response to double-strand breaks, halting the cell cycle for repair or triggering apoptosis. Germline TP53 variants cause Li-Fraumeni syndrome.
Telomere Maintenance
Telomeres protect chromosome ends from degradation and illegitimate recombination. TERT (telomerase reverse transcriptase) and TERC (telomerase RNA component) maintain telomere length. Short telomeres are associated with biological ageing, pulmonary fibrosis, and increased disease severity after viral infection.
Oxidative Dna Damage
Oxidative stress generates 8-oxoguanine and other modified bases. OGG1 (8-oxoguanine glycosylase) is the primary repair enzyme. OGG1 rs1052133 Ser326Cys reduces repair activity and has been associated with multiple cancer types in meta-analyses.
Key genes studied in relation to Genome Stability
The following genes have been studied in relation to Genome Stability, DNA Repair, and Cellular Integrity. These genes span the biological pathways most commonly discussed in this area of research.
Genetic variants commonly discussed
The following genetic variants (SNPs) are found in genes that have been studied in relation to Genome Stability. Each variant represents a position in the genome where individuals may carry different alleles.
19 variants total across genes studied in relation to Genome Stability.
How personal DNA data may provide educational insights
Consumer DNA files from 23andMe, AncestryDNA, and MyHeritage contain raw SNP data. When you upload your file to ChronicDNA, the analysis engine checks your genotype against a curated panel of 80+ genes selected for their relevance to Long COVID, ME/CFS, and connected biological pathways - some of which may relate to areas such as Genome Stability.
This is not a diagnostic service. Genetic variants do not determine whether you have Genome Stability, nor do they predict your clinical outcomes. The report is educational - it explains which variants you carry, what the research says about them, and how they fit into the biological pathways most relevant to chronic illness. All results should be discussed with a qualified healthcare provider.
Related conditions and pathways
Genome Stability shares biological pathways and genetic associations with the following related conditions and areas of research.
Frequently asked questions
Does COVID-19 damage DNA?
Studies have shown that SARS-CoV-2 can impair DNA damage repair pathways in infected cells, and COVID-19 is associated with markers of DNA damage and oxidative stress. Telomere shortening has been documented in severe COVID-19 patients. Whether these effects contribute to Long COVID symptoms is under investigation.
What are BRCA1 and BRCA2?
BRCA1 and BRCA2 encode proteins essential for homologous recombination DNA repair. Pathogenic variants substantially increase lifetime breast cancer (50–80%) and ovarian cancer (15–40% for BRCA1) risk. BRCA1/2 are tumour suppressor genes — cancer arises after somatic loss of the second allele in BRCA germline carriers.
Do telomere length genetics affect COVID-19 outcomes?
Short telomeres are associated with age-related diseases and reduced regenerative capacity. Studies have suggested shorter telomere length predicts worse COVID-19 outcomes and may predispose to Long COVID. TERT and TERC variants affecting telomere maintenance have been studied in pulmonary fibrosis, which shares features with severe COVID-19 lung disease.
Which genome stability genes are studied in chronic illness?
Key genes include TP53, ATM, BRCA1, BRCA2, CHEK2, OGG1, MUTYH, TERT, TERC, MLH1, and PARP1. These cover double-strand break repair, cell cycle checkpoints, oxidative base repair, telomere maintenance, and mismatch repair.
Explore DNA insights
If you already have DNA data from 23andMe, AncestryDNA, or MyHeritage, upload your raw file to ChronicDNA and receive a personalised educational report covering genes studied in relation to Genome Stability and connected biological pathways.
Get Your Personalised DNA ReportInformational and educational only · Not a diagnostic tool · GDPR compliant
8 genes · 19 variants analysed in relation to Genome Stability