5JQF:
reference: Structure and Mechanism of the Sphingopyxin I Lasso Peptide Isopeptidase., Fage CD, Hegemann JD, Nebel AJ, Steinbach RM, Zhu S, Linne U, Harms K, Bange G, Marahiel MA, Angew Chem Int Ed Engl. 2016 Oct 4;55(41):12717-21. doi: 10.1002/anie.201605232. , Epub 2016 Sep 9. PMID: 27611791

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