Protein
ATP-dependent helicase/deoxyribonuclease subunit B
Organism
Bacillus licheniformis (strain ATCC 14580 / DSM 13 / JCM 2505 / NBRC 12200 / NCIMB 9375 / NRRL NRS-1264 / Gibson 46)
Function
The heterodimer acts as both an ATP-dependent DNA helicase and an ATP-dependent, dual-direction single-stranded exonuclease. Recognizes the chi site generating a DNA molecule suitable for the initiation of homologous recombination. The AddB nuclease domain is not required for chi fragment generation; this subunit has 5' -> 3' nuclease activity.
Similarity
Belongs to the helicase family. AddB/RexB type 1 subfamily.
Sequence
MGAVFLSGRSGSGKTTFILNEIREKLRDEPLGKPIIFLVPDQMTFLMEYELSKTPDLGGTIRAQVYSFSRLAWRVLQHTGGMNRPFLTGTGIQMLLRRLIEEHKGEFKVYQNASDKSGFTEQVERMLTEFKRHCLPPQSIRDMMEGTGKSEYEDERILSDKLHDLYILYSKLEENLENQYVQSEDYLTLLAEQIPYAEEIRNAAVYVDGFHQFTPQEMSVLEQLMVHAEEITFSLTADKPFTANSPNDLHLFRMTGKAYYDLYQKAKELGLDPSEVRLEETKRHRHHPELQHLERYFDERPAKPYPGQTESLRIMQASNRRTEIEGIAREIHSLIRQGRFRLRDIAVIARNVEDYKDTIKEVFKDCELPFFIDGKESMQNHPLIELIRSTLDIIKGNWRYEAVFRCVKTELLFPEGQPKERLREQIDQLENYCIAYGIKGDRWTSKDPFVYRRYASLDEDFAKTDKEIETENMLNELKGWIVPPIHRLQKRLKKAETVREMAEAVYLYLEEADVPMKLEQERRLAEEGGRIAESRQHEQVWDAVIQLLDEFVEMMGTERISFALFQQMIETGLESLKFALIPPALDQVFIGNMDLSRMYGTKCTFLIGVNDGILPARPADDGVLSDEDREWLKRNGAQLAATGREQLLDENFLIYMTLSSPSEKLYVSYPIADSEGKTLLPSTVVKRLNELFPDSEEKMLIHEPEQLDDEAQLEFLVNKGIALSHLAGQLGIWTRQYAISDVWWSTYNFLMNEPDRIFSQNILSSLFFRNKVENLNRHVSRDLYGEHIQGSVSRMETFKACPFSHFASHGLKLKERQFFKLEAPDIGQLFHSALKLISDRLHELKLDWRDLTKAQCETLSSDAVERLAPKLQKEILLSSNRHHYVKQKLQKIIARVSGILSEHAKASGFAPVGIELGFGGKGPLPPMRFTLKNGCTMELVGRIDRVDKAESSKGLLLRIVDYKSSDKGLDLAEVYYGLALQMLTYLDLSITHSTDWLGMKASPAGVLYFHVHDPMIQASVPLGLDEIEKEIFKKFKMKGLLLGDQEAVKLMDTTLEQGRSNIISAGLKKDGSLRSDSDVVAEEDFHVLRRHIRRTFQQAGEEITDGKVSIEPYKLKDRTPCTYCSYRSFCQFDESLEENEYRILKPEKDSVILERLKKEDEADGDF