DNA repair

process of restoring DNA after damage

radioresistant extremophile species of bacterium

DNA recombination process

Breast cancer type 1 susceptibility protein is a protein that in humans is encoded by the BRCA1 () gene. Orthologs are common in other vertebrate species, whereas invertebrate genomes may encode a more distantly related gene. BRCA1 is a caretaker gene (responsible for repairing DNA), a type of tumor suppressor gene.

A pathway that repairs double-strand breaks in DNA

DNA repair protein RAD51 homolog 1 is a protein encoded by the gene RAD51. The enzyme encoded by this gene is a member of the RAD51 protein family which assists in repair of DNA double strand breaks. RAD51 family members are homologous to the bacterial RecA, Archaeal RadA, and yeast Rad51. The protein is highly conserved in most eukaryotes, from yeast to humans.

mammalian protein found in Homo sapiens

Photolyases () are DNA repair enzymes that repair damage caused by exposure to ultraviolet light. These enzymes require visible light (from the violet/blue end of the spectrum) both for their own activation and for the actual DNA repair. The DNA repair mechanism involving photolyases is called photoreactivation. They mainly convert pyrimidine dimers into a normal pair of pyrimidine bases. Photo reactivation, the first DNA repair mechanism to be discovered, was described initially by Albert Kelner in 1949 and independently by Renato Dulbecco also in 1949.

DNA repair mechanism

DNA repair pathway

system for fixing base errors of DNA replication and repairing some forms of DNA damage

8-Oxoguanine (8-hydroxyguanine, 8-oxo-Gua, or OH8Gua) is one of the most common DNA lesions resulting from reactive oxygen species modifying guanine, and can result in a mismatched pairing with adenine resulting in G to T and C to A substitutions in the genome. In humans, it is primarily repaired by DNA glycosylase OGG1. It can be caused by ionizing radiation, in connection with oxidative metabolism.

RecA is a 38 kilodalton protein essential for the repair and maintenance of DNA in bacteria. Structural and functional homologs to RecA have been found in all kingdoms of life. RecA serves as an archetype for this class of homologous DNA repair proteins. The homologous protein is called RAD51 in eukaryotes and RadA in archaea.

correction of replication errors by DNA polymerase using a 3'-5' exonuclease activity.

conserved heterotrimeric complex that binds nonspecifically to single-stranded DNA and is required for multiple processes in eukaryotic DNA metabolism

enzymes involved in base excision repair

DNA mismatch repair protein Msh2 also known as MutS homolog 2 or MSH2 is a protein that in humans is encoded by the MSH2 gene, which is located on chromosome 2. MSH2 is a tumor suppressor gene and more specifically a caretaker gene that codes for a DNA mismatch repair (MMR) protein, MSH2, which forms a heterodimer with MSH6 to make the human MutSα mismatch repair complex. It also dimerizes with MSH3 to form the MutSβ DNA repair complex. MSH2 is involved in many different forms of DNA repair, including transcription-coupled repair, homologous recombination, and base excision repair.

enzyme complex

mammalian protein found in Homo sapiens

InterPro Family

protein-coding gene in the species Homo sapiens

error-prone process for repairing damaged microbial DNA

protein-coding gene in the species Homo sapiens

protein-coding gene in the species Homo sapiens

DNA mismatch repair protein Mlh1 or MutL protein homolog 1 is a protein that in humans is encoded by the MLH1 gene located on chromosome 3. The gene is commonly associated with hereditary nonpolyposis colorectal cancer. Orthologs of human MLH1 have also been studied in other organisms including mouse and the budding yeast Saccharomyces cerevisiae.

Exodeoxyribonuclease V (EC 3.1.11.5, 'RecBCD, Exonuclease V, Escherichia coli exonuclease V, E. coli exonuclease V, gene recBC endoenzyme, RecBC deoxyribonuclease, gene recBC DNase, gene recBCD enzymes') is an enzyme of E. coli that initiates recombinational repair from potentially lethal double strand breaks in DNA which may result from ionizing radiation, replication errors, endonucleases, oxidative damage, and a host of other factors. The RecBCD enzyme is both a helicase that unwinds, or separates the strands of DNA, and a nuclease that makes single-stranded nicks in DNA. It catalyses exonu

biochemical site of damaged DNA or RNA

BioSentinel is a low-cost CubeSat spacecraft on an astrobiology mission that uses budding yeast to detect, measure, and compare the impact of deep space radiation on DNA repair over long time beyond low Earth orbit.

abnormal chemical structure in DNA

H2A histone family member X (usually abbreviated as H2AX) is a type of histone protein from the H2A family encoded by the H2AFX gene. An important phosphorylated form is γH2AX (S139), which forms when double-strand breaks appear.

group of protein complexes

family of protein complexes

protein-coding gene in the species Homo sapiens

A pathway that repairs double-strand breaks in DNA

mechanism in cells to repair double-strand DNA lesions

class of enzymes

protein-coding gene in the species Homo sapiens

protein-coding gene in the species Homo sapiens

protein-coding gene in the species Homo sapiens

SLX4 (also known as BTBD12 and FANCP) is a protein involved in DNA repair, where it has important roles in the final steps of homologous recombination. Mutations in the gene are associated with the disease Fanconi anemia.

DNA sequence recognized by LexA