Kristallstruktur der Methylornithin-Synthase (PylB): Einblicke in die Biosynthese von Pyrrolysin

Felix Quitterer, Anja List, Wolfgang Eisenreich, Adelbert Bacher, Michael Groll

Research output: Contribution to journalArticlepeer-review


Made by the barrel load: The biosynthetic pathway of the recently discovered 22nd amino acid, pyrrolysine, starts with an isomerization of lysine to methylornithine, catalyzed by PylB. The X-ray crystal structure of PylB is determined (see picture) and shows it has a TIM barrel fold. The sealed central cavity contains a [4Fe-4S] cluster, S-adenosylmethionine (SAM), and methylornithine, whose 2R,3R configuration could be confirmed. The data suggest a fragmentation–recombination mechanism via a glycyl radical intermediate.
Original languageEnglish (US)
Pages (from-to)1367-1370
Number of pages4
JournalAngewandte Chemie
Issue number6
StatePublished - Nov 16 2011
Externally publishedYes


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