DNA repair protein RadA (DNA repair protein SMS); DNA-dependent ATPase involved in processing of recombination intermediates, plays a role in repairing DNA breaks. Stimulates the branch migration of RecA-mediated strand transfer reactions, allowing the 3' invading strand to extend heteroduplex DNA faster. Binds ssDNA in the presence of ADP but not other nucleotides, has ATPase activity that is stimulated by ssDNA and various branched DNA structures, but inhibited by SSB. Does not have RecA's homology-searching function. Belongs to the RecA family. RadA subfamily.

Rv2735c, (MTCY154.15c), len: 330 aa. Conserved hypothetical protein, showing some similarity with Q98DH2|MLR4706 hypothetical protein from Rhizobium loti (Mesorhizobium loti) (302 aa), FASTA scores: opt: 140, E(): 0.062, (27.0% identity in 200 aa overlap); and Q9PHA1|XF0043 hypothetical protein from Xylella fastidiosa (293 aa), FASTA scores: opt: 120, E(): 1.2, (30.75% identity in 117 aa overlap). This region is a possible MT-complex-specific genomic island (See Becq et al.,2007).

Rv1901, (MTCY180.17c), len: 430 aa. Probable cinA-like protein, strong similarity to competence damage proteins CinA of Bacillus subtilis and S. pneumoniae. FASTA results: Q55760 hypothetical 44.7 kDa protein (416 aa) opt: 755, E(): 0, (36.0% identity in 433 aa overlap).

Crossover junction endodeoxyribonuclease RuvC; Nuclease that resolves Holliday junction intermediates in genetic recombination. Cleaves the cruciform structure in supercoiled DNA by nicking to strands with the same polarity at sites symmetrically opposed at the junction in the homologous arms and leaves a 5'-terminal phosphate and a 3'-terminal hydroxyl group (By similarity).

Probable holliday junction DNA helicase RuvA; The RuvA-RuvB complex in the presence of ATP renatures cruciform structure in supercoiled DNA with palindromic sequence, indicating that it may promote strand exchange reactions in homologous recombination. RuvAB is a helicase that mediates the Holliday junction migration by localized denaturation and reannealing. RuvA stimulates, in the presence of DNA, the weak ATPase activity of RuvB.

Multifunctional non-homologous end joining DNA repair protein LigD; With Ku forms a non-homologous end joining (NHEJ) repair enzyme which repairs DNA double-strand breaks (DSB) with reduced fidelity. Recognizes, processes and reseals DSBs, including repairs on incompatible DSB which require 3'-resection, gap filling and ligation. Anneals the 3' overhanging strands from opposing breaks to form a gapped intermediate, which then can be extended in trans by using the termini as primers for extension of the annealed break. Binds to the recessed 5'-phosphate moiety of the downstream DNA stra [...]

Repressor LexA; Represses a number of genes involved in the response to DNA damage (SOS response), including recA and lexA. Has been shown to bind to the 14 bp palindromic sequence 5'-CGAACNNNNGTTCG-3'. In the presence of single-stranded DNA, RecA interacts with LexA causing an autocatalytic cleavage which disrupts the DNA-binding part of LexA, leading to derepression of the SOS regulon and eventually DNA repair.

Rv2898c, (MTCY274.29c), len: 128 aa. Conserved hypothetical protein, highly similar to O33024|YS98_MYCLE|ML1607|MLCB250.49 hypothetical 11.0 KDA protein from Mycobacterium leprae (96 aa), FASTA scores: opt: 318, E(): 2.3e-16, (58.35% identity in 96 aa overlap). Also similar to other hypothetical proteins e.g. O69890|YE19_STRCO|SC2E1.19 from Streptomyces coelicolor (130 aa), FASTA scores: opt: 253, E(): 1.7e-11, (39.65% identity in 121 aa overlap); Q9HVZ1|PA4424 from Pseudomonas aeruginosa (125 aa), FASTA scores: opt: 234, E(): 4.2e-10,(40.85% identity in 115 aa overlap); O86871 from St [...]