Wikipedia

Lugdunin

Lugdunin is an investigational antibiotic, classified as a thiazolidine-containing cyclic peptide. It was isolated in 2016 after Staphylococcus lugdunensis was identified as the species of bacteria from the human nose that suppressed growth of species of disease-causing bacteria in that part of the human microbiome.[1][2][3]

Lugdunin
Names
IUPAC name
(1R,4R,7S,10R,13S,16R,19S)-7-(1H-Indol-3-ylmethyl)-10-isobutyl-4,13,16,19-tetraisopropyl-21-thia-3,6,9,12,15,18,23-heptaazabicyclo[18.2.1]tricosane-2,5,8,11,14,17-hexone
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
  • InChI=1S/C40H62N8O6S/c1-19(2)15-27-35(50)45-31(21(5)6)38(53)47-32(22(7)8)39(54)48-33(23(9)10)40-44-29(18-55-40)36(51)46-30(20(3)4)37(52)43-28(34(49)42-27)16-24-17-41-26-14-12-11-13-25(24)26/h11-14,17,19-23,27-33,40-41,44H,15-16,18H2,1-10H3,(H,42,49)(H,43,52)(H,45,50)(H,46,51)(H,47,53)(H,48,54)/t27-,28+,29+,30-,31+,32-,33+,40?/m1/s1
    Key: QZNGYMKAHFFKCJ-ZBQZSICZSA-N
  • InChI=1/C40H62N8O6S/c1-19(2)15-27-35(50)45-31(21(5)6)38(53)47-32(22(7)8)39(54)48-33(23(9)10)40-44-29(18-55-40)36(51)46-30(20(3)4)37(52)43-28(34(49)42-27)16-24-17-41-26-14-12-11-13-25(24)26/h11-14,17,19-23,27-33,40-41,44H,15-16,18H2,1-10H3,(H,42,49)(H,43,52)(H,45,50)(H,46,51)(H,47,53)(H,48,54)/t27-,28+,29+,30-,31+,32-,33+,40?/m1/s1
    Key: QZNGYMKAHFFKCJ-ZBQZSICZBY
  • CC(C)C[C@@H]1C(=O)N[C@H](C(=O)N[C@@H](C(=O)N[C@H](C2N[C@@H](CS2)C(=O)N[C@@H](C(=O)N[C@H](C(=O)N1)Cc3c[nH]c4c3cccc4)C(C)C)C(C)C)C(C)C)C(C)C
Properties
C40H62N8O6S
Molar mass 783.05 g·mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Lugdunin is a non-ribosomally synthesized cyclic peptide that inhibits growth of Staphylococcus aureus strains. The lugdunin genes are located on a 30-kbp operon. The genes lugA, lugB, lugC, and lugD encode four non-ribosomal peptide synthases, which are preceded by a putative regulator gene lugR.[4]

Gene locustag protein size/aa Genbank protein entry RefSeq protein entry
lugR SLUG_RS03935 196 CCB53263.1 WP_002460032.1
lugA SLUG_RS03940 2374 CCB53264.1 WP_002478842.1
SLUG_RS03945 124 CCB53265.1 WP_002460029.1
lugB SLUG_RS03950 1230 CCB53266.1 WP_014533237.1
lugC SLUG_RS03955 2937 CCB53267.1 WP_002478844.1
lugT SLUG_RS03960 228 CCB53268.1 WP_002460022.1
lugD SLUG_RS03965 579 CCB53269.1 WP_002478846.1
ChemDraw image depicting the synthesis of lugdunin. The synthesis proceeds in typical NRPS fashion with four distinct domains.
The NRPS synthesis of lugdunin prior to cyclization and thiazolidine formation.

Biosynthesis edit

Lugdunin is synthesized by non ribosomal peptide synthetases in S. lugdunensis. The molecule is a cyclic peptide composed of a thiazolidine heterocycle and three D amino acids. The operon responsible for lugdunin synthesis is approximately 30 kb and contains four non ribosomal peptide synthetase genes. The operon contains a phosphopantetheinyl transferase, monooxygenase, an unknown tailoring enzyme, a regulator gene, and a type II thioesterase.[5] Phosphopantetheinyl transferases carry out the activation of T domains, which act as carrier proteins. Monooxygenases incorporate a single hydroxyl into a lugdunin intermediate. The type II thioesterase is utilized to remove intermediates that stall during biosynthesis.[citation needed]

A surprising note about lugdunin is that the operon only encodes five adenylation domains, an interestingly small amount for such a large molecule. This discrepancy is accounted for by the addition of three consecutive valine residues in alternating D and L configurations by LugC. The thiazolidine ring forms following the release of the metabolite via reduction. The N-terminal L-Cysteine residue nucleophilically attacks the carbonyl[6] on the C-terminal L-valine residue, thus forming an imine macrocycle. The Schiff base formed in this reaction is then nucleophilically attacked by a cysteine thiol which produces the thiazolidine heterocycle previously described.[citation needed]

References edit

  1. ^ Gallagher, James (2016-07-27). "Antibiotic resistance: 'Snot wars' study heralds new class of drugs". BBC News. Retrieved 2016-07-27.
  2. ^ Zipperer, Alexander; Konnerth, Martin C.; Laux, Claudia; Berscheid, Anne; Janek, Daniela; Weidenmaier, Christopher; Burian, Marc; Schilling, Nadine A.; Slavetinsky, Christoph (2016). "Human commensals producing a novel antibiotic impair pathogen colonization". Nature. 535 (7613): 511–516. Bibcode:2016Natur.535..511Z. doi:10.1038/nature18634. PMID 27466123. S2CID 205249755.
  3. ^ "Scientists find microbiotic treasure hidden in the nose". Los Angeles Times. 2016-07-27. Retrieved 2016-07-27.
  4. ^ Krismer, Bernhard; Peschel, Andreas; Grond, Stephanie; Brötz-Oesterhelt, Heike; Schittek, Birgit; Kalbacher, Hubert; Willmann, Matthias; Marschal, Matthias; Slavetinsky, Christoph; Schilling, Nadine A.; Burian, Marc; Weidenmaier, Christopher; Janek, Daniela; Berscheid, Anne; Laux, Claudia; Konnerth, Martin C.; Zipperer, Alexander (July 2016). "Extended Data Figure 1: Gene cluster of lugdunin and generation of S. lugdunensis IVK28-Xyl". Nature. 535 (7613): 511–516. Bibcode:2016Natur.535..511Z. doi:10.1038/nature18634. PMID 27466123. S2CID 205249755.
  5. ^ Krauss, Sophia; Zipperer, Alexander; Wirtz, Sebastian; Saur, Julian; Konnerth, Martin C.; Heilbronner, Simon; Torres Salazar, Benjamin O.; Grond, Stephanie; Krismer, Bernhard; Peschel, Andreas (2020-12-16). "Secretion of and Self-Resistance to the Novel Fibupeptide Antimicrobial Lugdunin by Distinct ABC Transporters in Staphylococcus lugdunensis". Antimicrobial Agents and Chemotherapy. 65 (1): e01734–20. doi:10.1128/AAC.01734-20. ISSN 0066-4804. PMC 7927808. PMID 33106269.
  6. ^ "Lugdunin - an overview | ScienceDirect Topics". www.sciencedirect.com. Retrieved 2022-06-04.

External links edit


 

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