Modifies the topological state of DNA by introducing positive supercoils in an ATP-dependent process. It cleaves transiently a single DNA strand and remains covalently bound to the 5' DNA end through a tyrosine residue. May be involved in rewinding the DNA strands in the regions of the chromosome that have opened up to allow transcription or replication.

In the C-terminal section; belongs to the prokaryotic type I/III topoisomerase family.

1117 amino acids

MALATGAKYYHSCINCGGINTDTRNEKGLPCEVCLPFEDGDVLKGLKLNNSLKGYEKYWNLNQQYKEFEEFFFSKINKKPTGYQRFWAKRLLLSKSFTLVAPTGVGKTTFGLISALWIAKKGGKVALVFPTVSLVEQAAKRLIEFSKEDEDVNILFYTSSLKKKEREKFEKNFSEGNYDILVISSQFISKRKEQLSQKVFDLVFVDDVDAVLKSSKNIDTLLNMIGISQKAIDSTLDNLKKGNNSDKIQIEEKAPKGRLIVSSATAKPKGIKPLLFRELLGFEIGRFTTSARNITNVRIKEKSLEKLLYIINLLKDGILLFVPTEEEGKEIANYLEEHGVKLGKTWEDFEKSFEKFKEGSLQLLCGIYSYYGKLVRGIDLPLRIKFAVFWGTPSFKFSTKLENAPRFILERNFQDYLENNPKLKAYFKDLQRLSTEKLRKSVEKYISPETWEKLIQKNFPTTKFDKEKNLIVIPDVYTYIQASGRTSRIFGTSLTKGISILFEEDDSLFELLKARLLYLTEEEWTEEGEIEHLVKEAEETRKAISTDSSSKDMKSRMIIVESPTKAQTISKFLEKSSTRRYGSLMVHESITQEGILLLTASKGHLYDLETKTGLHGVEINDGRFIPYYNSIKRCSSCGAQFTDELPRCPYCNSDKIDDKKKILEALRDIAMEVDEVIIATDPDVEGEKIGWDISQYIKPVNKNVQRIEMHEITKFGFDKAIRNRRNCDVNLVKSQIVRRIEDRWVGFELSLRLQKNFQNSNLSAGRVQSTVLGWILEKEIEHSKSKKTVTQFTLDNGFKFEVDGKIDVDEVEVEIVEEKEQALSPLPPFNTPSLLTAASQQFKLPVQQIMEILQTLFELGFITYHRTDSTRISSTGQKIARSYLEKIGKITLLSEREWGKEGAHEAIRPVKPISPEELSEFITEKIAAYLSPMHIKVYSLIFNRFMASQMTSPVVINQKILIKNGSFQVEREVPVKLQEEGWNIFNPITVYTPFEEKKYSVVSKRTYTTHTVPLFTQASLIEEMQKRNIGRPSTYAKIVDILFKRKYIIEDVYKRLRTTALGRKVYSYLSERYMNYINEETTRQLEKLMESVETGEKDYQSVLKNLYEELNEILIKN

128.6 kDa

(Note: Representative image - actual molecular weight may vary depending on tag type and expression method)

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