Protein
Phenyloxazoline synthase MbtB
Organism
Mycobacterium tuberculosis (strain CDC 1551 / Oshkosh)
Function
Involved in the initial steps of the mycobactin biosynthetic pathway. Putatively couples activated salicylic acid with serine or threonine and cyclizes this precursor to the hydroxyphenyloxazoline ring system present in this class of siderophores. Essential for growth in macrophages.
Similarity
Belongs to the ATP-dependent AMP-binding enzyme family. MbtB subfamily.
Sequence
MVHATACSEIIRAEVAELLGVRADALHPGANLVGQGLDSIRMMSLVGRWRRKGIAVDFATLAATPTIEAWSQLVSAGTGVAPTAVAAPGDAGLSQEGEPFPVAPMQHAMWVGRHDHQQLGGVAGHLYVEFDGARVDPDRLRAAATRLALRHPMLRVQFLPDGTQRIPPAAGSRDFPISVADLRHVAPDVVDQRLAGIRDAKSHQQLDGAVFELALTLLPGERTRLHVDLDMQAADAMSYRILLADLAALYDGREPPALGYTYREYRQAIEAEETLPQPVRDADRDWWAQRIPQLPDPPALPTRAGGERDRRRSTRRWHWLDPQTRDALFARARARGITPAMTLAAAFANVLARWSASSRFLLNLPLFSRQALHPDVDLLVGDFTSSLLLDVDLTGARTAAARAQAVQEALRTAAGHSAYPGLSVLRDLSRHRGTQVLAPVVFTSALGLGDLFCPDVTEQFGTPGWIISQGPQVLLDAQVTEFDGGVLVNWDVREGVFAPGVIDAMFTHQVDELLRLAAGDDAWDAPSPSALPAAQRAVRAALNGRTAAPSTEALHDGFFRQAQQQPDAPAVFASSGDLSYAQLRDQASAVAAALRAAGLRVGDTVAVLGPKTGEQVAAVLGILAAGGVYLPIGVDQPRDRAERILATGSVNLALVCGPPCQVRVPVPTLLLADVLAAAPAEFVPGPSDPTALAYVLFTSGSTGEPKGVEVAHDAAMNTVETFIRHFELGAADRWLALATLECDMSVLDIFAALRSGGAIVVVDEAQRRDPDAWARLIDTYEVTALNFMPGWLDMLLEVGGGRLSSLRAVAVGGDWVRPDLARRLQVQAPSARFAGLGGATETAVHATIFEVQDAANLPPDWASVPYGVPFPNNACRVVADSGDDCPDWVAGELWVSGRGIARGYRGRPELTAERFVEHDGRTWYRTGDLARYWHDGTLEFVGRADHRVKISGYRVELGEIEAALQRLPGVHAAAATVLPGGSDVLAAAVCVDDAGVTAESIRQQLADLVPAHMIPRHVTLLDRIPFTDSGKIDRAEVGALLAAEVERSGDRSAPYAAPRTVLQRALRRIVADILGRANDAVGVHDDFFALGGDSVLATQVVAGIRRWLDSPSLMVADMFAARTIAALAQLLTGREANADRLELVAEVYLEIANMTSADVMAALDPIEQPAQPAFKPWVKRFTGTDKPGAVLVFPHAGGAAAAYRWLAKSLVANDVDTFVVQYPQRADRRSHPAADSIEALALELFEAGDWHLTAPLTLFGHCMGAIVAFEFARLAERNGVPVRALWASSGQAPSTVAASGPLPTADRDVLADMVDLGGTDPVLLEDEEFVELLVPAVKADYRALSGYSCPPDVRIRANIHAVGGNRDHRISREMLTSWETHTSGRFTLSHFDGGHFYLNDHLDAVARMVSADVR