Protein
Lysylphosphatidylglycerol biosynthesis bifunctional protein LysX
Organism
Mycobacterium abscessus (strain ATCC 19977 / DSM 44196 / CIP 104536 / JCM 13569 / NCTC 13031 / TMC 1543)
Function
Catalyzes the production of L-lysyl-tRNA(Lys)transfer and the transfer of a lysyl group from L-lysyl-tRNA(Lys) to membrane-bound phosphatidylglycerol (PG), which produces lysylphosphatidylglycerol (LPG), one of the components of the bacterial membrane with a positive net charge. LPG synthesis contributes to the resistance to cationic antimicrobial peptides (CAMPs) and likely protects M.tuberculosis against the CAMPs produced by competiting microorganisms (bacteriocins). In fact, the modification of anionic phosphatidylglycerol with positively charged L-lysine results in repulsion of the peptides (By similarity).
Similarity
In the C-terminal section; belongs to the class-II aminoacyl-tRNA synthetase family.
Sequence
MTSIKPAVEPPAPDHPAVTALPGIGARPAARPPVTSRWRWVPAFFGWFVGIQAILNFLSSISPFIRMVTKLPREFVDEYLFGWPDGSLSWAFVLSLLAAALAVRKSIAWWVLLIDLLGRSALNVGGFIEHRDTTELIGLVVHGAFILLLLLARKEFYAKVRRGATVKAALVLIAGMAAGTVLAWGLLELFPRTLVPGDRFWWALNRVAGFSIASHRDFDGLPPHFLNWLFGLFGALALIAAAIVLFRSQRAVNALTGDDESLIRGLLERYGQDDSLGYFATRRDKAVIFAPNGRAAVTYRVEVGVCLVSADPIGDKSAWGQAISAWLQVCDAYGWAPAVMGASAEGALAYREHGLNALELGDEAILYPRSFSISGPHMATVRQAVNRARRSGLSVRIRRHRELSAEETKQIIVNADLWRDGNTERGFSMALGRLGDSTDGDCLLVEAIDSTGDPVAMLSLVPWGTNGVSLELMRRSRQSPNGTIEFMVTELLTRAEGMGITRVSLNFVMFRSVYADGSRIGAGPVLRLWRSVLMFASRFWQFEQLYRSNVKYQPEWVPRFACYEDARLIPRIGIASVIAEGFLVLPFGNRDKPRHTGQYSAVPQAIVATGLLHHDGSTPELLPQTAPQQRVPEQVKVRLGKLAALQEKGIDTYPVGSPPSHTVAEALAAPDGSEVVISGRLLRIRDYGGVLFAQLRDWSAEVQLLIDDPRLHEEFTAAVDLGDLVEASGVMGQSNNGTRSVLVESWRIIGKCLHPLPDKRKGLTDPEARVRARYLDLAINPEAREQIAARSAIITSLRNTLLAQGFLEVETPILQQVHGGANARPFLTHINAYNLDLYLRIAPELYLKRLCVGGVEKVFELGRAFRNEGVDFSHNPEFTLLEAYQAHADYVTWAQTTQRLIQNAAKAAHGAEVVMRPGADGRLAPVDIGGEWPIVPVHEAVSRALGEEVNAATEVPTLQRFCQSAEVQFNPRWDAGHLVLELYERLVEKHTTSPTFYSDFPVSVSPLTRPHRSIAGLAERWDLVAWGVELGTAYTELTDPVEQRRRLYEQSLLAAGGDAEAMELDEDFLRAMEYAMAPTGGMGMGVDRVVMLITGRSIRETLPFPLAKPR