7n8e
From Proteopedia
PptT PAP(CoA) 9056 complex
Structural highlights
FunctionPPTT_MYCTU Transfers the 4'-phosphopantetheine moiety from coenzyme A to a Ser of acyl-carrier-protein (PubMed:9831524, PubMed:16709676, PubMed:25785780, PubMed:28203522). Involved in post-translational modification of various type-I polyketide synthases required for the formation of both mycolic acids and lipid virulence factors (PubMed:16709676). Acts on Pks13, Mas, PpsA, PpsB, PpsC and PpsD (PubMed:16709676, PubMed:28203522). Also acts on AcpM, the meromycolate extension acyl carrier protein (PubMed:25785780). In addition, is involved in the activation of the acyl carrier protein MbtL and the nonribosomal peptides synthases MbtB and MbtE, which are involved in the biosynthesis of the siderophore mycobactin (PubMed:9831524, PubMed:28203522).[1] [2] [3] [4] Required for the replication and survival of Mycobacterium during the acute and chronic phases of infection in mice.[5] Publication Abstract from PubMedA newly validated target for tuberculosis treatment is phosphopantetheinyl transferase, an essential enzyme that plays a critical role in the biosynthesis of cellular lipids and virulence factors in Mycobacterium tuberculosis. The structure-activity relationships of a recently disclosed inhibitor, amidinourea (AU) 8918 (1), were explored, focusing on the biochemical potency, determination of whole-cell on-target activity for active compounds, and profiling of selective active congeners. These studies show that the AU moiety in AU 8918 is largely optimized and that potency enhancements are obtained in analogues containing a para-substituted aromatic ring. Preliminary data reveal that while some analogues, including 1, have demonstrated cardiotoxicity (e.g., changes in cardiomyocyte beat rate, amplitude, and peak width) and inhibit Cav1.2 and Nav1.5 ion channels (although not hERG channels), inhibition of the ion channels is largely diminished for some of the para-substituted analogues, such as 5k (p-benzamide) and 5n (p-phenylsulfonamide). In Vitro and In Vivo Inhibition of the Mycobacterium tuberculosis Phosphopantetheinyl Transferase PptT by Amidinoureas.,Ottavi S, Scarry SM, Mosior J, Ling Y, Roberts J, Singh A, Zhang D, Goullieux L, Roubert C, Bacque E, Lagiakos HR, Vendome J, Moraca F, Li K, Perkowski AJ, Ramesh R, Bowler MM, Tracy W, Feher VA, Sacchettini JC, Gold BS, Nathan CF, Aube J J Med Chem. 2022 Jan 19. doi: 10.1021/acs.jmedchem.1c01565. PMID:35044775[6] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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