4j4b
From Proteopedia
PylD in complex with L-lysine-Ne-D-ornithine and NADH
Structural highlights
FunctionPYLD_METBF Catalyzes the ultimate step of the pyrrolysine biosynthesis pathway by converting the isopeptide (3R)-3-methyl-D-ornithyl-N(6)-L-lysine to the 22nd proteinogenic amino acid (PubMed:24916332). Is able to use surrogate substrates such as (3R)-D-ornithyl-N(6)-L-lysine in vitro (PubMed:23720358, PubMed:24916332).[1] [2] Publication Abstract from PubMedThe final step in the biosynthesis of the 22nd genetically encoded amino acid, pyrrolysine, is catalyzed by PylD, a structurally and mechanistically unique dehydrogenase. This catalyzed reaction includes an induced-fit mechanism achieved by major structural rearrangements of the N-terminal helix upon substrate binding. Different steps of the reaction trajectory are visualized by complex structures of PylD with substrate and product. Structure and Reaction Mechanism of Pyrrolysine Synthase (PylD).,Quitterer F, Beck P, Bacher A, Groll M Angew Chem Int Ed Engl. 2013 May 29. doi: 10.1002/anie.201301164. PMID:23720358[3] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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