Enhancing structural diversity of terpenoids by multisubstrate terpene synthases

• Min Li and
• Hui Tao

Beilstein J. Org. Chem. 2024, 20, 959–972, doi:10.3762/bjoc.20.86

• selectivity with the noncanonical prenyl substrates. To enable the biotechnological synthesis of irregular terpenes, the product selectivity of 2-methylenebornane synthase from Pseudomonas fluorescenes was altered using a semi-rational engineering approach [56]. In contrast to GPP methylation, modification of

Activity assays of NnlA homologs suggest the natural product N-nitroglycine is degraded by diverse bacteria

• Kara A. Strickland,
• Brenda Martinez Rodriguez,
• Ashley A. Holland,
• Shelby Wagner,
• Michelle Luna-Alva,
• David E. Graham and
• Jonathan D. Caranto

Beilstein J. Org. Chem. 2024, 20, 830–840, doi:10.3762/bjoc.20.75

• assignment of NnlA as a heme-binding PAS domain protein. As previously reported for a structural homology model of Vs NnlA, the heme position was estimated by overlaying the AlphaFold model with the structure of Pseudomonas aeruginosa Aer2 (Figure 5B). By this method, the His73 is located near the heme

• °C in deoxygenated 30 mM tricine buffer at pH 7.5. Alpha-fold model of Vs NnlA dimer (cyan) overlayed with Pseudomonas aeruginosa (grey; PDB: 3VOL [35][36]) to estimate the position and orientation of the heme cofactor. Conserved residues in the distal heme pocket are labeled. Conserved basic

New variochelins from soil-isolated Variovorax sp. H002

• Jabal Rahmat Haedar,
• Aya Yoshimura and
• Toshiyuki Wakimoto

Beilstein J. Org. Chem. 2024, 20, 692–700, doi:10.3762/bjoc.20.63

• bacteria (Bacillus cereus NBRC 15305 and Kocuria rhizophila NBRC 12708). In addition, several in-house collections of plant pathogens including Erwinia rhapontici_D020, Pantoea agglomerans_G054_1, Agrobacterium tumefaciens_K021_1, Pseudomonas syringae_E029, Ralstonia basilensis_M004 and Paraburkholderia Sp

Chemical and biosynthetic potential of Penicillium shentong XL-F41

• Ran Zou,
• Xin Li,
• Xiaochen Chen,
• Yue-Wei Guo and
• Baofu Xu

Beilstein J. Org. Chem. 2024, 20, 597–606, doi:10.3762/bjoc.20.52

• all isolated compounds against a panel of microorganisms (Table 4), including Escherichia coli (ATCC 25922), Candida albicans (ATCC 76485), Staphylococcus aureus (ATCC 27154), Pseudomonas fulva (CGMCC 1.15147), and Enterobacter hormaechei (CGMCC 1.10608). The results indicated that compounds 3, 5, 6

Pseudallenes A and B, new sulfur-containing ovalicin sesquiterpenoid derivatives with antimicrobial activity from the deep-sea cold seep sediment-derived fungus Pseudallescheria boydii CS-793

• Zhen Ying,
• Xiao-Ming Li,
• Sui-Qun Yang,
• Hong-Lei Li,
• Xin Li,
• Bin-Gui Wang and
• Ling-Hong Meng

Beilstein J. Org. Chem. 2024, 20, 470–478, doi:10.3762/bjoc.20.42

• –3 were tested against seven human- and marine-derived aquatic pathogenetic bacteria (Edwardsiella tarda, Escherichia coli, Micrococcus luteus, Pseudomonas aeruginosa, Vibrio anguillarum, Vibrio harveyi, and Vibrio vulnificus), and six plant pathogenic fungi (Alternaria brassicae, Colletotrichum

• pathogenic bacteria (Escherichia coli QDIO-1 and Pseudomonas aeruginosa QDIO-4) and aquatic pathogens (Edwardsiella tarda QDIO-2, Micrococcus luteus QDIO-3, V. anguillarum QDIO-6, Vibrio harveyi QDIO-7, and V. vulnificus QDIO-10), as well as plant pathogenic fungi (Colletotrichum gloeosporioides QDAU-2

Synthetic approach to 2-alkyl-4-quinolones and 2-alkyl-4-quinolone-3-carboxamides based on common β-keto amide precursors

• Yordanka Mollova-Sapundzhieva,
• Plamen Angelov,
• Danail Georgiev and
• Pavel Yanev

Beilstein J. Org. Chem. 2023, 19, 1804–1810, doi:10.3762/bjoc.19.132

• -quinolones produced by the Gram-negative opportunistic pathogen Pseudomonas aeruginosa and related species feature a saturated long-chain substituent at position 2 and are sometimes referred to as pseudanes [34][35]. Pseudomonas aeruginosa alone produces over 50 different quinolones, among which the most

• conditions, and allows easy installation of long-chain substituents at the C-2 position of the quinolone core. These characteristics of the synthetic method could be particularly attractive in the search of novel mimics of the Pseudomonas quorum-sensing signal molecules. The high activity of compounds 4d and

Intermediates and shunt products of massiliachelin biosynthesis in Massilia sp. NR 4-1

• Till Steinmetz,
• Blaise Kimbadi Lombe and
• Markus Nett

Beilstein J. Org. Chem. 2023, 19, 909–917, doi:10.3762/bjoc.19.69

• signal at δH 7.62 ppm characteristic for an amide. In vitro tests were conducted for all compounds to assess their antibacterial activities against three Gram-negative bacteria (Escherichia coli, Agrobacterium tumefaciens and Pseudomonas fluorescens) and one Gram-positive bacterium (Bacillus subtilis

• ]. Natural products that are structurally related to 1–6 were discovered in Pseudomonas aeruginosa. It was shown that these compounds function as signaling molecules involved in quorum sensing and stress response [24] which might be an explanation for their low bioactivity against the tested bacteria. Upon

Synthesis of imidazo[1,2-a]pyridine-containing peptidomimetics by tandem of Groebke–Blackburn–Bienaymé and Ugi reactions

• Oleksandr V. Kolomiiets,
• Alexander V. Tsygankov,
• Maryna N. Kornet,
• Aleksander A. Brazhko,
• Vladimir I. Musatov and
• Valentyn A. Chebanov

Beilstein J. Org. Chem. 2023, 19, 727–735, doi:10.3762/bjoc.19.53

• ), Pseudomonas aeruginosa (strain 1111) (Gram-negative). Compared to the reference substance, nitroxoline, the compounds generally showed lower levels of activity. However, some of the compounds demonstrated weak antimicrobial effects, as evidenced by their ability to inhibit the growth of the test

Synthesis of C6-modified mannose 1-phosphates and evaluation of derived sugar nucleotides against GDP-mannose dehydrogenase

• Sanaz Ahmadipour,
• Alice J. C. Wahart,
• Jonathan P. Dolan,
• Laura Beswick,
• Chris S. Hawes,
• Robert A. Field and
• Gavin J. Miller

Beilstein J. Org. Chem. 2022, 18, 1379–1384, doi:10.3762/bjoc.18.142

• pathogen in these cases is mucoid Pseudomonas aeruginosa. Such infections are characterised by overproduction of the exopolysaccharide alginate. We present herein the design and chemoenzymatic synthesis of sugar nucleotide tools to probe a critical enzyme within alginate biosynthesis, GDP-mannose

• evaluation against GMD. Keywords: alginate; chemical probe; enzymatic synthesis; GDP-mannose dehydrogenase; sugar nucleotide; Introduction The opportunistic Gram-negative pathogen, Pseudomonas aeruginosa (PA), becomes the dominant pathogen in patients suffering from cystic fibrosis (CF) and causes a

Make or break: the thermodynamic equilibrium of polyphosphate kinase-catalysed reactions

• Michael Keppler,
• Sandra Moser,
• Henning J. Jessen,
• Christoph Held and
• Jennifer N. Andexer

Beilstein J. Org. Chem. 2022, 18, 1278–1288, doi:10.3762/bjoc.18.134

• , PPK2) was found in Pseudomonas aeruginosa in 2002 [5]. PPK2 were later subdivided into three classes: PPK2-I, PPK2-II, and PPK2-III phosphorylating nucleotide diphosphates (NDPs), nucleotide monophosphates (NMPs), and both, respectively [6]. Nevertheless, these substrate profiles rather seem to be

Glycosylated coumarins, flavonoids, lignans and phenylpropanoids from Wikstroemia nutans and their biological activities

• Meifang Wu,
• Xiangdong Su,
• Yichuang Wu,
• Yuanjing Luo,
• Ying Guo and
• Yongbo Xue

Beilstein J. Org. Chem. 2022, 18, 200–207, doi:10.3762/bjoc.18.23

• antimicrobial activities [27], the antimicrobial activity of compounds 1–4 was also evaluated against the bacteria Escherichia coli, Staphylococcus aureus subsp. aureus, Salmonella enterica subsp. enterica, and Pseudomonas aeruginosa. However, all of them were found to be devoid of inhibitory activity (MIC >250

• against nitric oxide (NO) production in LPS-stimulated RAW 264.7 mouse macrophages. The antibacterial activities of compounds 1–4 against Escherichia coli, Staphylococcus aureus subsp. aureus, Salmonella enterica subsp. enterica, and Pseudomonas aeruginosa were also tested, however, none of them showed

• concentration in the supernatants with Griess reagent as described previously [28]. Antimicrobial assay Compounds 1–4 were evaluated for their antimicrobial activities against Escherichia coli, Staphylococcus aureus subsp. aureus, Salmonella enterica subsp. enterica, and Pseudomonas aeruginosa. Antimicrobial

Synthetic strategies toward 1,3-oxathiolane nucleoside analogues

• Umesh P. Aher,
• Dhananjai Srivastava,
• Girij P. Singh and
• Jayashree B. S

Beilstein J. Org. Chem. 2021, 17, 2680–2715, doi:10.3762/bjoc.17.182

• intermediate 37 was resolved using a lipase in t-BuOMe, resulting in a high enantiomeric excess. They used an enzymatic resolution of an acetoxy sulfide with a Pseudomonas fluorescens lipase to obtain compound 38. Reaction of chiral acetoxy sulfide 38 with HCl in dry ethanol induced acetate removal by

• isolated oxathiolane precursor 41, as discussed earlier, by enzymatic resolution of an acetoxy sulfide by a Pseudomonas fluorescens lipase. Using this pure precursor 41, the synthesis of 3TC (1) was accomplished by N-glycosylation with silylated base using trimethylsilyl trifluoromethanesulfonate (TMSOTf

Isolation and characterization of new phenolic siderophores with antimicrobial properties from Pseudomonas sp. UIAU-6B

• Emmanuel T. Oluwabusola,
• Olusoji O. Adebisi,
• Fernando Reyes,
• Kojo S. Acquah,
• Mercedes De La Cruz,
• Larry L. Mweetwa,
• Joy E. Rajakulendran,
• Digby F. Warner,
• Deng Hai,
• Rainer Ebel and
• Marcel Jaspars

Beilstein J. Org. Chem. 2021, 17, 2390–2398, doi:10.3762/bjoc.17.156

• Infectious Diseases Research in Africa, University of Cape Town, Rondebosch, 7701, South Africa 10.3762/bjoc.17.156 Abstract Five new phenolic siderophores 1–5 were isolated from the organic extract of a culture broth in a modified SGG medium of Pseudomonas sp. UIAU-6B, obtained from sediments collected

• ; pseudomonine; Pseudomonas sp.; vancomycin-sensitive Enterococcus faecium; Introduction The introduction of antimicrobial drugs in the mid-20th century has had an unprecedented positive impact on human health, but the current threat of multiple drug resistance may well roll back all these past achievements [1

• ]. One way out of this is an extensive search for novel bioactive natural products from microbial sources [2][3]. There is focus on the genus Pseudomonas for scientific research due to its widespread distribution in water, soil, and extreme habitats, including the exceptional ability to colonize the

Microwave-assisted multicomponent reactions in heterocyclic chemistry and mechanistic aspects

• Shivani Gulati,
• Stephy Elza John and
• Nagula Shankaraiah

Beilstein J. Org. Chem. 2021, 17, 819–865, doi:10.3762/bjoc.17.71

• . Observations revealed that the conventional refluxing method produced only 10% of the desired product and brought microwave assistance to light. The synthesized molecules showed good antimicrobial activity against Escherichia coli, Candida tropicalis, Staphylococcus aureus and Pseudomonas aeruginosa (Scheme 12

β-Lactamase inhibition profile of new amidine-substituted diazabicyclooctanes

• Zafar Iqbal,
• Lijuan Zhai,
• Yuanyu Gao,
• Dong Tang,
• Xueqin Ma,
• Jinbo Ji,
• Jian Sun,
• Jingwen Ji,
• Yuanbai Liu,
• Rui Jiang,
• Yangxiu Mu,
• Lili He,
• Haikang Yang and
• Zhixiang Yang

Beilstein J. Org. Chem. 2021, 17, 711–718, doi:10.3762/bjoc.17.60

• in clinical practice in combination with ceftazidime [6]. Followed by avibactam, a relebactam/imipenem/cilastatin [6] combination has been approved by the FDA for the treatment of clinical indications against carbapenemases, ESBLs, and MDR Enterobacteriaceae as well as Pseudomonas aeruginosa [19][20

Identification of volatiles from six marine Celeribacter strains

• Anuj Kumar Chhalodia,
• Jan Rinkel,
• Dorota Konvalinkova,
• Jörn Petersen and
• Jeroen S. Dickschat

Beilstein J. Org. Chem. 2021, 17, 420–430, doi:10.3762/bjoc.17.38

• from the roseobacter group is the production of the sulfur-containing antibiotic tropodithietic acid (TDA) in Phaeobacter piscinae DSM 103509T [28], a compound that is in equilibrium with its tautomer thiotropocin [29] that was first described from Pseudomonas sp. CB-104 [30]. Its biosynthesis depends

Secondary metabolites of Bacillus subtilis impact the assembly of soil-derived semisynthetic bacterial communities

• Heiko T. Kiesewalter,
• Carlos N. Lozano-Andrade,
• Mikael L. Strube and
• Ákos T. Kovács

Beilstein J. Org. Chem. 2020, 16, 2983–2998, doi:10.3762/bjoc.16.248

• %), and Gaiella (3–4%). The communities of the 12 h precultivated soil suspension consisted primarily of the two genera Bacillus (56–65%) and Acinetobacter (29–34%). Additional genera with an abundance higher than 1% were Lysinibacillus (1.2–3.2%), Pseudomonas (1.0–2.2%), and Viridibacillus (0.6–1.5

• Acinetobacter correlated best with the communities supplemented with the NRP-producing B. subtilis strains, hinting a higher frequency of these in NRP-treated communities. Additionally, three ASVs, identified as Pseudomonas, Citrobacter, and Sphingobacterium, correlated with two communities treated with the

• communities, compared to the precultivated soil suspensions and contained 11–18 genera (Figure 3). The most abundant genera, having a proportion greater than 0.19% in at least one B. subtilis-treated or untreated mock community were Acinetobacter, Lysinibacillus, Pseudomonas, Chryseobacterium, Bacillus

Dirhamnolipid ester – formation of reverse wormlike micelles in a binary (primerless) system

• David Liese,
• Hans Henning Wenk,
• Xin Lu,
• Jochen Kleinen and
• Gebhard Haberhauer

Beilstein J. Org. Chem. 2020, 16, 2820–2830, doi:10.3762/bjoc.16.232

• Pseudomonas aeruginosa, a Gram-negative rod-shaped bacterium [5][6][7][8]. RL are built up by one or two rhamnose sugar units as well as one to three β-hydroxy fatty acids, which can also be unsaturated. These highly functional biomolecules exhibit interesting biological and antibacterial properties, as

Synthesis of 1,4-benzothiazinones from acylpyruvic acids or furan-2,3-diones and o-aminothiophenol

• Ekaterina E. Stepanova,
• Maksim V. Dmitriev and
• Andrey N. Maslivets

Beilstein J. Org. Chem. 2020, 16, 2322–2331, doi:10.3762/bjoc.16.193

• (detailed data on biological assays is given in Supporting Information File 1). Unfortunately, we found that tested BTAs 3 did not show any significant antimicrobial activity (against Staphylococcus aureus, Escherichia coli, Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa, Candida

Syntheses of spliceostatins and thailanstatins: a review

• William A. Donaldson

Beilstein J. Org. Chem. 2020, 16, 1991–2006, doi:10.3762/bjoc.16.166

• (Figure 1) are a family of linear peptide/polyketide natural products isolated from the bacteria Burkholderia sp. FERM BP-3421 [1][2][3] (originally identified as Pseudomonas sp. No 2663) and Burkholderia sp. MSMB 43 [4][5]. These compounds are of interest due to their ability to bind to a subunit of the

4-Hydroxy-3-methyl-2(1H)-quinolone, originally discovered from a Brassicaceae plant, produced by a soil bacterium of the genus Burkholderia sp.: determination of a preferred tautomer and antioxidant activity

• Dandan Li,
• Naoya Oku,
• Yukiko Shinozaki,
• Yoichi Kurokawa and
• Yasuhiro Igarashi

Beilstein J. Org. Chem. 2020, 16, 1489–1494, doi:10.3762/bjoc.16.124

• rutaceous plants [9]. Examples from microbes include chymase inhibitors SF2809-I to VI from an actinomycete of the genus Dactylosporangium [10], a quorum sensing signaling molecule 2,4-dihydroxyquinoline (DHQ, 4) from Gram-negative bacteria Pseudomonas aeruginosa and Burkholderia thailandensis, [7], and 4-O

• emerging source of bioactive molecules. Many new structure classes, even after being spun off as a new genus from Pseudomonas in 1992 [14], have been discovered from this group, which, along with their large genomes comparable to those of actinomycetes or myxobacteria, demonstrate a higher capacity of

• . Though not alkylated, the close structural similarity to 3 suggests that 1 is also a member of the 2-alkyl-4-quinolone class signaling molecules/antibiotics known from Pseudomonas aeruginosa and some Burkholderia species [26][27]. Quinolones of this class are classified into two lineages, those with or

Pigmentosins from Gibellula sp. as antibiofilm agents and a new glycosylated asperfuran from Cordyceps javanica

• Soleiman E. Helaly,
• Wilawan Kuephadungphan,
• Patima Phainuphong,
• Mahmoud A. A. Ibrahim,
• Kanoksri Tasanathai,
• Suchada Mongkolsamrit,
• Janet Jennifer Luangsa-ard,
• Souwalak Phongpaichit,
• Vatcharin Rukachaisirikul and
• Marc Stadler

Beilstein J. Org. Chem. 2019, 15, 2968–2981, doi:10.3762/bjoc.15.293

• for their ability to interfere in the biofilm formation of Staphylococcus aureus DSM1104 and Pseudomonas aeruginosa PA14 [51]. The biofilm inhibition assay was performed in 96-well microtiter plates using the microtiter dish biofilm formation assay described by O’Toole [52], with minor modifications

Chemical synthesis of tripeptide thioesters for the biotechnological incorporation into the myxobacterial secondary metabolite argyrin via mutasynthesis

• David C. B. Siebert,
• Roman Sommer,
• Domen Pogorevc,
• Michael Hoffmann,
• Silke C. Wenzel,
• Rolf Müller and
• Alexander Titz

Beilstein J. Org. Chem. 2019, 15, 2922–2929, doi:10.3762/bjoc.15.286

• Saarbrücken, Germany 10.3762/bjoc.15.286 Abstract The argyrins are secondary metabolites from myxobacteria with antibiotic activity against Pseudomonas aeruginosa. Studying their structure–activity relationship is hampered by the complexity of the chemical total synthesis. Mutasynthesis is a promising

• variants of known antibiotics are being developed and were approved in the last few years, also comprising drugs active against Pseudomonas aeruginosa, one of the currently most problematic bacterial pathogens [1]. Especially among the quinolones, cephalosporins and carbapenems new compounds have been

Skeletocutins M–Q: biologically active compounds from the fruiting bodies of the basidiomycete Skeletocutis sp. collected in Africa

• Tian Cheng,
• Clara Chepkirui,
• Cony Decock,
• Josphat C. Matasyoh and
• Marc Stadler

Beilstein J. Org. Chem. 2019, 15, 2782–2789, doi:10.3762/bjoc.15.270

• coli (E. coli) DSM498, Chromobacterium violaceum (C. violaceum) DSM30191, and Pseudomonas aeruginosa (P. aeruginosa) PA14. Moreover, the filamentous fungus Mucor plumbeus (M. plumbeus) MUCL49355 and the yeasts Candida tenuis (C. tenuis) MUCL29892, Pichia anomala (P. anomala) DSM6766, and Candida

Current understanding and biotechnological application of the bacterial diterpene synthase CotB2

• Ronja Driller,
• Daniel Garbe,
• Norbert Mehlmer,
• Monika Fuchs,
• Keren Raz,
• Dan Thomas Major,
• Thomas Brück and
• Bernhard Loll

Beilstein J. Org. Chem. 2019, 15, 2355–2368, doi:10.3762/bjoc.15.228

• marinum; diterpene synthase (BAP82229), Streptomyces sp. ND90; tsukubadiene synthase (EIF90392), Streptomyces tsukubaensis NRRL 18488; terpene synthase (ZP_00085244), Pseudomonas fluorescens PfO-1; spiroalbatene synthase (WP_030426588.1), Allokutzneria albata; spatadien synthase (WP_095757924.1