Search results for "CYCLIC LIPOPEPTIDES"

showing 3 items of 3 documents

The LuxR Regulators PcoR and RfiA Co-regulate Antimicrobial Peptide and Alginate Production in Pseudomonas corrugata

2018

Cyclic lipopeptides (CLPs) are considered as some of the most important secondary metabolites in different plant-associated bacteria, thanks to their antimicrobial, cytotoxic, and surfactant properties. In this study, our aim was to investigate the role of the Quorum Sensing (QS) system, PcoI/PcoR, and the LuxR-type transcriptional regulator RfiA in CLP production in the phytopatogenic bacterium, Pseudomonas corrugata based on our previous work where we reported that the pcoR and rfiA mutants were devoid of the CLPs cormycin and corpeptin production. Due to the close genetic link between the QS system and the RfiA (rfiA is co-transcribed with pcoI), it was difficult to ascertain the specifi…

0301 basic medicineMicrobiology (medical)transcriptional analysiscyclic lipopeptides RNA-seq non-ribosomal peptides transcriptional analysis exopolysaccarides030106 microbiologyAntimicrobial peptidesMutantexopolysaccarideslcsh:QR1-502exopolysaccarideMicrobiologylcsh:Microbiology03 medical and health sciencescyclic lipopeptideGene expressionnon-ribosomal peptideTranscriptional regulationGenebiologyChemistrySettore AGR/12 - Patologia Vegetalebiology.organism_classificationQuorum sensingPseudomonas corrugatacyclic lipopeptidesRegulonBiochemistrynon-ribosomal peptidesRNA-seqFrontiers in Microbiology
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The structure and biosynthesis of heinamides A1-A3 and B1-B5, antifungal members of the laxaphycin lipopeptide family.

2021

Laxaphycins are a family of cyclic lipopeptides with synergistic antifungal and antiproliferative activities. They are produced by multiple cyanobacterial genera and comprise two sets of structurally unrelated 11- and 12-residue macrocyclic lipopeptides. Here, we report the discovery of new antifungal laxaphycins from Nostoc sp. UHCC 0702, which we name heinamides, through antimicrobial bioactivity screening. We characterized the chemical structures of eight heinamide structural variants A1-A3 and B1-B5. These variants contain the rare non-proteinogenic amino acids 3-hydroxy-4-methylproline, 4-hydroxyproline, 3-hydroxy-d-leucine, dehydrobutyrine, 5-hydroxyl beta-amino octanoic acid, and O-c…

BIOCHEMICAL-CHARACTERIZATIONNostocGENE-CLUSTER116 Chemical sciencesALGA ANABAENA-LAXAaminohapotPRODUCT01 natural sciencesBiochemistryCELL-PROLIFERATIONbiosynteesi03 medical and health scienceschemistry.chemical_compoundLipopeptidesBiosynthesisGene clusterPhysical and Theoretical ChemistryHYDROXYPROLINE030304 developmental biologyantimikrobiset yhdisteetchemistry.chemical_classificationWhole genome sequencing0303 health sciencesbiology010405 organic chemistryOrganic ChemistryLipopeptidePEPTIDESCYANOBACTERIAbiology.organism_classification3. Good health0104 chemical sciencesAmino acidEnzymeBiochemistrychemistrypeptiditHeterologous expressionCYCLIC LIPOPEPTIDESINHIBITORSOrganicbiomolecular chemistry
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The LuxR Regulators PcoR and RfiA Co-regulate Antimicrobial Peptide and Alginate Production in

2017

Cyclic lipopeptides (CLPs) are considered as some of the most important secondary metabolites in different plant-associated bacteria, thanks to their antimicrobial, cytotoxic, and surfactant properties. In this study, our aim was to investigate the role of the Quorum Sensing (QS) system, PcoI/PcoR, and the LuxR-type transcriptional regulator RfiA in CLP production in the phytopatogenic bacterium, Pseudomonas corrugata based on our previous work where we reported that the pcoR and rfiA mutants were devoid of the CLPs cormycin and corpeptin production. Due to the close genetic link between the QS system and the RfiA (rfiA is co-transcribed with pcoI), it was difficult to ascertain the specifi…

transcriptional analysiscyclic lipopeptidesexopolysaccaridesnon-ribosomal peptidesRNA-seqMicrobiologyOriginal ResearchFrontiers in microbiology
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