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  1. Article ; Online: Diversity and spatial distribution of native bees in Mt. Banahaw de Lucban, Philippines

    Gascon Cecilia N. / Almazol Amalia E. / Garcia Ronald C. / Vitoriano Maynard M.

    Folia Oecologica, Vol 50, Iss 1, Pp 44-

    2023  Volume 54

    Abstract: Native bees are pollinators and bioindicators of ecosystem health but only little is known about its abundance, species distribution, and habitat range, especially in the Philippines. This study assessed the diversity and spatial distribution of native ... ...

    Abstract Native bees are pollinators and bioindicators of ecosystem health but only little is known about its abundance, species distribution, and habitat range, especially in the Philippines. This study assessed the diversity and spatial distribution of native bees in Mt. Banahaw de Lucban (MBDL). Belt transect coupled with opportunistic sampling were used in the inventory of bees and their nests. Nests occurrence and 7 environmental predictor variables including; 1) annual mean temperature; 2) precipitation of warmest quarter; 3) elevation; 4) slope; 5) Normalized Difference Vegetation Index (NDVI); 6) distance to agricultural areas (m); and 7) distance to forested areas (m) were used for modeling species distribution by MaxEnt. A total of 16 species of native bees including representatives from genus Apis, Tetragonula, Lasioglossum, Halictus, Hylaeus and Megachile were identified. A total of 96 bee nests from 5 species were also recorded yielding a nests density of 234 nests per km2. Results showed medium diversity of solitary native bees with H’ of 2.488. Most bee nests were found in lower elevations while the distance from agricultural areas and the distance from forest areas had the highest contributions to the nesting of Apis breviligula, A. cerana, and Tetragonula biroi. The mean distance from forest areas of all bee nests was 649.930 m and the mean extent of suitable area for these species was 5.340 km2. Hence, a landscape approach may be more appropriate to conserve native bees and sustain the ecosystem services they provide in MBDL.
    Keywords apis breviligula ; apis cerana ; bee forage ; habitat suitability ; tetragonula biroi ; Ecology ; QH540-549.5
    Subject code 333
    Language English
    Publishing date 2023-01-01T00:00:00Z
    Publisher Sciendo
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article ; Online: Three New Stigmatellin Derivatives Reveal Biosynthetic Insights of Its Side Chain Decoration.

    Okoth, Dorothy A / Hug, Joachim J / Garcia, Ronald / Müller, Rolf

    Molecules (Basel, Switzerland)

    2022  Volume 27, Issue 14

    Abstract: Myxobacteria generate natural products with unique chemical structures, which not only feature remarkable biological functions, but also demonstrate unprecedented biosynthetic assembly strategies. The stigmatellins have been previously described as ... ...

    Abstract Myxobacteria generate natural products with unique chemical structures, which not only feature remarkable biological functions, but also demonstrate unprecedented biosynthetic assembly strategies. The stigmatellins have been previously described as potent inhibitors of the mitochondrial and photosynthetic respiratory chain and originate from an unusual polyketide synthase assembly line. While previous biosynthetic investigations were focused on the formation of the 5,7-dimethoxy-8-hydroxychromone ring, side chain decoration of the hydrophobic alkenyl chain in position 2 was investigated less thoroughly. We report here the full structure elucidation, as well as cytotoxic and antimicrobial activities of three new stigmatellins isolated from the myxobacterium
    MeSH term(s) Biosynthetic Pathways ; Electron Transport ; Polyenes ; Polyketide Synthases/metabolism ; Polyketides
    Chemical Substances Polyenes ; Polyketides ; Polyketide Synthases (79956-01-7) ; stigmatellin (91682-96-1)
    Language English
    Publishing date 2022-07-21
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 1413402-0
    ISSN 1420-3049 ; 1431-5165 ; 1420-3049
    ISSN (online) 1420-3049
    ISSN 1431-5165 ; 1420-3049
    DOI 10.3390/molecules27144656
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.MO 81: Show issues

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  3. Article ; Online: New Deoxyenhygrolides from

    Hug, Joachim J / Kjaerulff, Louise / Garcia, Ronald / Müller, Rolf

    Marine drugs

    2022  Volume 20, Issue 1

    Abstract: Marine myxobacteria present a virtually unexploited reservoir for the discovery of natural products with diverse biological functions and novel chemical scaffolds. We report here the isolation and structure elucidation of eight new deoxyenhygrolides ( ...

    Abstract Marine myxobacteria present a virtually unexploited reservoir for the discovery of natural products with diverse biological functions and novel chemical scaffolds. We report here the isolation and structure elucidation of eight new deoxyenhygrolides (
    MeSH term(s) 4-Butyrolactone/analogs & derivatives ; 4-Butyrolactone/biosynthesis ; 4-Butyrolactone/chemistry ; Animals ; Aquatic Organisms ; Myxococcales
    Chemical Substances butenolide (8KXK25H388) ; 4-Butyrolactone (OL659KIY4X)
    Language English
    Publishing date 2022-01-14
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2175190-0
    ISSN 1660-3397 ; 1660-3397
    ISSN (online) 1660-3397
    ISSN 1660-3397
    DOI 10.3390/md20010072
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  4. Article: Myxobacteria of the

    Panter, Fabian / Popoff, Alexander / Garcia, Ronald / Krug, Daniel / Müller, Rolf

    Microorganisms

    2022  Volume 10, Issue 3

    Abstract: Vitamin K is an essential, lipid soluble vitamin that plays an important role in the human blood coagulation cascade as well as in the life cycle of bacteria and plants. In this study, we report the isolation and structure elucidation of unprecedented ... ...

    Abstract Vitamin K is an essential, lipid soluble vitamin that plays an important role in the human blood coagulation cascade as well as in the life cycle of bacteria and plants. In this study, we report the isolation and structure elucidation of unprecedented polyhydroxylated menaquinone variants named myxoquinones that are produced by myxobacteria and structurally belong to the Vitamin K family. We analyze the occurrence of myxoquinones across an LC-MS data collection from myxobacterial extracts and shed light on the distribution of myxoquinone-type biosynthetic gene clusters among publicly available myxobacterial genomes. Our findings indicate that myxoquinones are specifically produced by strains of the
    Language English
    Publishing date 2022-02-28
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2720891-6
    ISSN 2076-2607
    ISSN 2076-2607
    DOI 10.3390/microorganisms10030534
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  5. Article: Discovery, Biosynthesis and Biological Activity of a Succinylated Myxochelin from the Myxobacterial Strain MSr12020.

    Okoth, Dorothy A / Hug, Joachim J / Garcia, Ronald / Müller, Rolf

    Microorganisms

    2022  Volume 10, Issue 10

    Abstract: Myxobacteria feature unique biological characteristics, including their capability to glide on the surface, undergo different multicellular developmental stages and produce structurally unique natural products such as the catecholate-type siderophores ... ...

    Abstract Myxobacteria feature unique biological characteristics, including their capability to glide on the surface, undergo different multicellular developmental stages and produce structurally unique natural products such as the catecholate-type siderophores myxochelins A and B. Herein, we report the isolation, structure elucidation and a proposed biosynthesis of the new congener myxochelin B-succinate from the terrestrial myxobacterial strain MSr12020, featuring a succinyl decoration at its primary amine group. Myxochelin-B-succinate exhibited antibacterial growth inhibition and moderate cytotoxic activity against selected human cancer cell lines. This unique chemical modification of myxochelin B might provide interesting insights for future microbiological studies to understand the biological function and biosynthesis of secondary metabolite succinylation.
    Language English
    Publishing date 2022-09-30
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2720891-6
    ISSN 2076-2607
    ISSN 2076-2607
    DOI 10.3390/microorganisms10101959
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  6. Article ; Online: New myxobacteria of the

    Walesch, Sebastian / Garcia, Ronald / Mahmoud, Abdelhalim B / Panter, Fabian / Bollenbach, Sophie / Mäser, Pascal / Kaiser, Marcel / Krug, Daniel / Müller, Rolf

    Microbiology spectrum

    2024  Volume 12, Issue 3, Page(s) e0368923

    Abstract: In the past century, microbial natural products have proven themselves to be substantial and fruitful sources of anti-infectives. In addition to the well-studied Actinobacteria, understudied bacterial taxa like the Gram-negative myxobacteria have ... ...

    Abstract In the past century, microbial natural products have proven themselves to be substantial and fruitful sources of anti-infectives. In addition to the well-studied Actinobacteria, understudied bacterial taxa like the Gram-negative myxobacteria have increasingly gained attention in the ongoing search for novel and biologically active natural products. In the course of a regional sampling campaign to source novel myxobacteria, we recently uncovered new myxobacterial strains MCy12716 and MCy12733 belonging to the
    MeSH term(s) Humans ; Myxococcales/genetics ; Antiparasitic Agents/pharmacology ; Pandemics ; Malaria, Falciparum ; Plasmodium falciparum ; Biological Products/pharmacology
    Chemical Substances Antiparasitic Agents ; Biological Products
    Language English
    Publishing date 2024-02-01
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2807133-5
    ISSN 2165-0497 ; 2165-0497
    ISSN (online) 2165-0497
    ISSN 2165-0497
    DOI 10.1128/spectrum.03689-23
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Structure Elucidation and Biosynthesis of Nannosterols A and B, Myxobacterial Sterols from

    Akone, Sergi H / Hug, Joachim J / Kaur, Amninder / Garcia, Ronald / Müller, Rolf

    Journal of natural products

    2023  Volume 86, Issue 4, Page(s) 915–923

    Abstract: Myxobacteria represent an underinvestigated source of chemically diverse and biologically active secondary metabolites. Here, we report the discovery, isolation, structure elucidation, and biological evaluation of two new bacterial sterols, termed ... ...

    Abstract Myxobacteria represent an underinvestigated source of chemically diverse and biologically active secondary metabolites. Here, we report the discovery, isolation, structure elucidation, and biological evaluation of two new bacterial sterols, termed nannosterols A and B (
    MeSH term(s) Sterols ; Myxococcales/chemistry ; Phytosterols
    Chemical Substances Sterols ; Phytosterols
    Language English
    Publishing date 2023-04-03
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 304325-3
    ISSN 1520-6025 ; 0163-3864
    ISSN (online) 1520-6025
    ISSN 0163-3864
    DOI 10.1021/acs.jnatprod.2c01143
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    In stock of ZB MED Cologne/Königswinter

    Zs.A 1144: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (1.OG)
    ab Jg. 2022: Lesesaal (EG)

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  8. Article ; Online: International Committee on Systematics of Prokaryotes: subcommittee on the taxonomy of Myxobacteria (Myxococcota). Minutes of the closed online meeting, 21 September 2022.

    Hahnke, Richard L / Müller, Rolf / Whitworth, David / Wink, Joachim / Garcia, Ronald

    International journal of systematic and evolutionary microbiology

    2023  Volume 73, Issue 5

    MeSH term(s) Myxococcales ; Phylogeny ; DNA, Bacterial/genetics ; RNA, Ribosomal, 16S/genetics ; Sequence Analysis, DNA ; Bacterial Typing Techniques ; Base Composition ; Fatty Acids/chemistry ; Bacteria
    Chemical Substances DNA, Bacterial ; RNA, Ribosomal, 16S ; Fatty Acids
    Language English
    Publishing date 2023-05-26
    Publishing country England
    Document type Journal Article
    ZDB-ID 2002336-4
    ISSN 1466-5034 ; 1466-5026
    ISSN (online) 1466-5034
    ISSN 1466-5026
    DOI 10.1099/ijsem.0.005846
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 409: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (1.OG)
    ab Jg. 2022: Lesesaal (EG)

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  9. Article ; Online: Simulacricoccus ruber gen. nov., sp. nov., a microaerotolerant, non-fruiting, myxospore-forming soil myxobacterium and emended description of the family Myxococcaceae.

    Garcia, Ronald / Müller, Rolf

    International journal of systematic and evolutionary microbiology

    2018  Volume 68, Issue 10, Page(s) 3101–3110

    Abstract: A non-fruiting group of myxobacteria was previously speculated to exist in nature based on metagenomics data containing uncultured members of the order Myxococcales. Here, we describe a myxobacterial strain, designated ... ...

    Abstract A non-fruiting group of myxobacteria was previously speculated to exist in nature based on metagenomics data containing uncultured members of the order Myxococcales. Here, we describe a myxobacterial strain, designated MCy10636
    MeSH term(s) Bacterial Typing Techniques ; Base Composition ; DNA, Bacterial/genetics ; Fatty Acids/chemistry ; Germany ; Myxococcales/classification ; Myxococcales/genetics ; Myxococcales/isolation & purification ; Phylogeny ; RNA, Ribosomal, 16S/genetics ; Sequence Analysis, DNA ; Soil Microbiology
    Chemical Substances DNA, Bacterial ; Fatty Acids ; RNA, Ribosomal, 16S
    Language English
    Publishing date 2018-08-16
    Publishing country England
    Document type Journal Article
    ZDB-ID 2002336-4
    ISSN 1466-5034 ; 1466-5026
    ISSN (online) 1466-5034
    ISSN 1466-5026
    DOI 10.1099/ijsem.0.002936
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 409: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (1.OG)
    ab Jg. 2022: Lesesaal (EG)

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  10. Article: New Deoxyenhygrolides from Plesiocystis pacifica Provide Insights into Butenolide Core Biosynthesis

    Hug, Joachim J. / Kjaerulff, Louise / Garcia, Ronald / Müller, Rolf

    Marine drugs. 2022 Jan. 14, v. 20, no. 1

    2022  

    Abstract: Marine myxobacteria present a virtually unexploited reservoir for the discovery of natural products with diverse biological functions and novel chemical scaffolds. We report here the isolation and structure elucidation of eight new deoxyenhygrolides (1–8) ...

    Abstract Marine myxobacteria present a virtually unexploited reservoir for the discovery of natural products with diverse biological functions and novel chemical scaffolds. We report here the isolation and structure elucidation of eight new deoxyenhygrolides (1–8) from the marine myxobacterium Plesiocystis pacifica DSM 14875ᵀ. The herein described deoxyenhygrolides C–J (1–8) feature a butenolide core with an ethyl residue at C-3 of the γ-lactone in contrast to the previously described derivatives, deoxyenhygrolides A and B, which feature an isobutyl residue at this position. The butenolide core is 2,4-substituted with a benzyl (1, 2 and 7), benzoyl (3 and 4) or benzyl alcohol (5, 6 and 8) moiety in the 2-position and a benzylidene (1–6) or benzylic hemiketal (7 and 8) in the 4-position. The description of these new deoxyenhygrolide derivatives, alongside genomic in silico investigation regarding putative biosynthetic genes, provides some new puzzle pieces on how this natural product class might be formed by marine myxobacteria.
    Keywords benzyl alcohol ; biosynthesis ; computer simulation ; genomics ; moieties ; myxobacteria
    Language English
    Dates of publication 2022-0114
    Publishing place Multidisciplinary Digital Publishing Institute
    Document type Article
    ZDB-ID 2175190-0
    ISSN 1660-3397
    ISSN 1660-3397
    DOI 10.3390/md20010072
    Database NAL-Catalogue (AGRICOLA)

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