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BioAssay: AID 1819

Probe Development Summary of Inhibitors of Bacillus subtilis Sfp phosphopantetheinyl transferase (PPTase)

The covalent attachment of a phosphopantetheinyl (4'-PP) arm to a variety of synthases and other proteins is a key posttranslational protein modification. The 4'-PP is installed on the proteins post-translationally from coenzyme A (CoA) on a conserved serine residue by action of phosphopantetheinyl transferase (PPTase) enzymes. Phosphopantetheinylation is essential for synthase activity, and more ..
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AID: 1819
Data Source: NCGC (PPTA100)
BioAssay Type: Summary, Candidate Probes/Leads with Supporting Evidence
Depositor Category: NIH Molecular Libraries Probe Production Network
Deposit Date: 2009-06-17
Target
Depositor Specified Assays
Show more
AIDNameTypeComment
1490qHTS Assay for Inhibitors of Bacillus subtilis Sfp phosphopantetheinyl transferase (PPTase)confirmatory
2701Confirmation qHTS Assay for Inhibitors of Bacillus subtilis Sfp phosphopantetheinyl transferase (PPTase)confirmatory
2707Gel-Based Assay for Inhibitors of Bacillus subtilis Sfp phosphopantetheinyl transferase (PPTase)confirmatory
493214Inhibitos of Bacillus subtilis Sfp phosphopantetheinyl transferase (PPTase): Dry Powder Followupconfirmatory
540350qHTS Assay for Inhibitos of Bacillus subtilis Sfp phosphopantetheinyl transferase (PPTase): Chemistry Optimization Followupconfirmatory
540352qHTS for Inhibitos of Bacillus subtilis Sfp phosphopantetheinyl transferase (PPTase): Chemistry Optimization Followup in B. Subtilis 168confirmatory
540353qHTS for Inhibitos of Bacillus subtilis Sfp phosphopantetheinyl transferase (PPTase): Chemistry Optimization Followup in B. Subtilis HM489confirmatory
540355Gel-Based Assay for Inhibitos of Bacillus subtilis Sfp phosphopantetheinyl transferase (PPTase): Chemistry Optimization Followupconfirmatory
602360qHTS Assay for Inhibitors of Bacillus subtilis AcpS phosphopantetheinyl transferase (PPTase): SARconfirmatory
602362qHTS Assay for Inhibitors of Bacillus subtilis Sfp phosphopantetheinyl transferase (PPTase): Gel Based Assayconfirmatory
602366qHTS Assay for Inhibitors of Bacillus subtilis Sfp phosphopantetheinyl transferase (PPTase): SAR in B subtilis HM489confirmatory
602370qHTS Assay for Inhibitors of Bacillus subtilis Sfp phosphopantetheinyl transferase (PPTase): SAR Round 2confirmatory
602371qHTS Assay for Inhibitors of Bacillus subtilis Sfp phosphopantetheinyl transferase (PPTase): SAR in B subtilis 168confirmatory
602373qHTS Assay for Inhibitors of Bacillus subtilis Sfp phosphopantetheinyl transferase (PPTase): Hepg2 Assayconfirmatory
602391qHTS Assay for Inhibitors of Bacillus subtilis Sfp phosphopantetheinyl transferase (PPTase): SAR in hGST A1-1confirmatory
602392qHTS Assay for Inhibitors of Bacillus subtilis Sfp phosphopantetheinyl transferase (PPTase): Label Free Assay for SARother
602479qHTS Assay for Inhibitors of Bacillus subtilis Sfp phosphopantetheinyl transferase (PPTase): Mouse Liver Microsome Stability (Half Time)other
602480qHTS Assay for Inhibitors of Bacillus subtilis Sfp phosphopantetheinyl transferase (PPTase): Aqueous Solubility in PBSother
624112qHTS Assay for Inhibitors of Bacillus subtilis Sfp phosphopantetheinyl transferase (PPTase): Aqueous Solubility in PBSother
624113qHTS Assay for Inhibitors of Bacillus subtilis Sfp phosphopantetheinyl transferase (PPTase): Mouse Plasma Stabilityother
624118qHTS Assay for Inhibitors of Bacillus subtilis Sfp phosphopantetheinyl transferase (PPTase): CYP 3A4other
624119qHTS Assay for Inhibitors of Bacillus subtilis Sfp phosphopantetheinyl transferase (PPTase): CYP 2D6other
Description:
Source: NIH Chemical Genomics Center [NCGC]
Assay Submitter: Michael Burkart, University of California, San Diego
Screening Center PI: Christopher P. Austin, NIH
Probe Development: NIH Chemical Genomics Center [NCGC]
NIH Grant Number: MH083266-01

The covalent attachment of a phosphopantetheinyl (4'-PP) arm to a variety of synthases and other proteins is a key posttranslational protein modification. The 4'-PP is installed on the proteins post-translationally from coenzyme A (CoA) on a conserved serine residue by action of phosphopantetheinyl transferase (PPTase) enzymes. Phosphopantetheinylation is essential for synthase activity, and removal of the PPTase gene precludes natural product synthesis in microorganisms, or in the case of fatty acid biosynthesis, renders the organism unviable. PPTase enzymes belong to a distinct structural superfamily. Within bacteria, these enzymes are grouped into two classes based upon primary structure, the AcpS-Type and Sfp-Type PPTases.

Sfp-type PPTases, corresponding to an activator of surfactin production in Bacillus subtilis, are responsible for modifying type I polyketide and nonribosomal peptide synthases of prokaryotes. Sfp-type PPTases are responsible for the activation of a variety of pathogen-associated virulence factors. Among these compounds are toxins such as mycolactone from Mycobacterium ulcerans, siderophores such as vibriobactin from Vibrio cholerae or mycobactin from Mycobacterium tuberculosis, as well as the mycolic acids which form the waxy cell wall of Mycobacteria. The biosyntheses of these natural products are considered attractive targets for drug design.

This BioAssay summarizes the development of novel small molecule Sfp-PPTase inhibitors and their follow-up characterization.
Protocol
Please see related BioAssays for all protocols relevant to this probe development project: AIDs 1490
Comment
Related BioAssays:

AID 1490: This assays is a validation of a quantitative high throughput screening (qHTS) protocol tested against 1,113 samples.

This summary assay will be updated as additional screens are run and small molecule probes have been developed.
Additional Information
Grant Number: MH083266-01

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