Mitochondrial DNA endonuclease and mRNA maturase involved in intron homing and required for splicing of the cytochrome b (cobA) gene intron, containing its own coding sequence. The protein stimulates the intrinsic ribozyme activity of the intron through binding to and stabilizing specific secondary and tertiary structure elements in the RNA. As an endonuclease it introduces a specific double-strand break at the junction of the two exons the cobA gene and thus mediates the insertion of an intron, containing its own coding sequence (group I intron), into an intronless gene. Recognizes with limited specificity and cleaves the sequence 5'-GAGGAGGTTTCTCTGTA-3'. The proteins RNA and DNA recognition and binding surfaces are independent.

In the C-terminal section; belongs to the LAGLIDADG endonuclease family.

488 amino acids

MRILKSHPLLKIVNSYIIDSPQPANLSYLWNFGSLLALCLGIQIVTGVTLAMHYTPSVSEAFNSVEHIMRDVNNGWLVRYLHSNTASAFFFLVYLHIGRGLYYGSYKTPRTLTWAIGTVILIVMMATAFLGYVLPYGQMSLWGATVITNLMSAIPWIGQDIVEFIWGGLYTDEPQCGDVLLKILLNAGKSPILGFAYDLFFIIVLLIGVKIAMTRGKSAGVRSLHTSEASQRLHAGDLTYAYLVGLFEGDGYFSITKKGKYLTYELGIELSIKDVQLIYKIKKILGIGIVSFRKINEIEMVALRIRDKNHLKSFILPIFEKYPMFSNKQYDYLRFRNALLSGIISLEDLPDYTRSDEPLNSIESIINTSYFSAWLVGFIEAEGCFSVYKLNKDDDYLIASFDIAQRDGDILISAIRKYLSFTTKVYLDKTNCSKLKVTSVRSVENIIKFLQNAPVKLLGNKKLQYLLWLKQLRKISRYSEKIKIPSNY

55.4 kDa

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

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