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Bioprospecting

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https://www.readbyqxmd.com/read/28420137/modification-of-the-mycotoxin-deoxynivalenol-using-microorganisms-isolated-from-environmental-samples
#1
Nina M Wilson, Nicole McMaster, Dash Gantulga, Cara Soyars, Susan P McCormick, Ken Knott, Ryan S Senger, David G Schmale
The trichothecene mycotoxin deoxynivalenol (DON) is a common contaminant of wheat, barley, and maize. New strategies are needed to reduce or eliminate DON in feed and food products. Microorganisms from plant and soil samples collected in Blacksburg, VA, USA, were screened by incubation in a mineral salt media containing 100 μg/mL DON and analysis by gas chromatography mass spectrometry (GC/MS). Two mixed cultures derived from soil samples consistently decreased DON levels in assays using DON as the sole carbon source...
April 15, 2017: Toxins
https://www.readbyqxmd.com/read/28376612/marine-algicolous-endophytic-fungi-a-promising-drug-resource-of-the-era
#2
REVIEW
Manomi Sarasan, Jayesh Puthumana, Neema Job, Jeonghoon Han, Jae-Seong Lee, Rosamma Philip
Endophytic fungi have currently been acknowledged, as the most promising source of bioactive compounds for drug discovery and considerable progress has been made in exploring their diversity, species richness, and bioprospecting. Fungal endophytes from unique environmental settings offer a pool of potentially useful medicinal entities. Due to the constant stresses imposed on macroalgae by marine environment, it is believed that algae and their associated endophytic symbionts represent a good source of structurally diverse bioactive secondary metabolites...
April 5, 2017: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28376308/differential-colonization-by-bioprospected-rhizobial-bacteria-associated-to-common-bean-in-different-cropping-systems-i-i
#3
Josiele Polzin de Oliveira-Francesquini, Mariangela Hungria, Daiani Cristina Savi, Chirlei Glienke, Rodrigo Aluizio, Vanessa Kava, Lygia Vitória Galli-Terasawa
In this study, we evaluated the diversity of rhizobia isolated from root nodules on common bean (<i>Phaseolus vulgaris</i>) derived from Andean and Mesoamerican centers and grown under field and greenhouse conditions. Genetic characterization of isolates was performed by sequencing analyses of the 16S rRNA and two housekeeping genes, <i>rec</i>A and <i>gln</i>II, and by the amplification of <i>nif</i>H. Symbiotic efficiency was evaluated by examining nodulation, plant-biomass production and plant-N accumulation...
April 4, 2017: Canadian Journal of Microbiology
https://www.readbyqxmd.com/read/28367143/comparative-mrna-expression-profiles-of-riboflavin-biosynthesis-genes-in-lactobacilli-isolated-from-human-feces-and-fermented-bamboo-shoots
#4
Kiran Thakur, Sudhir K Tomar, Zhao-Jun Wei
With the aim to bioprospect potent riboflavin producing lactobacilli, the present study was carried out to evaluate the relative mRNA expression of riboflavin biosynthesis genes namely Rib 1, Rib 2, Rib 3, and Rib 4 from potent riboflavin producers obtained from our previous studies. All the four genes were successfully cloned and sequenced for further analysis by in silico procedures. As studied by non-denaturing Polyacrylamide gel electrophoresis, no difference in size of all the four genes among those of various lactobacilli was observed...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28335513/bioactive-potential-of-marine-macroalgae-from-the-central-red-sea-saudi-arabia-assessed-by-high-throughput-imaging-based-phenotypic-profiling
#5
Stephan Kremb, Constanze Müller, Philippe Schmitt-Kopplin, Christian R Voolstra
Marine algae represent an important source of novel natural products. While their bioactive potential has been studied to some extent, limited information is available on marine algae from the Red Sea. This study aimed at the broad discovery of new bioactivities from a collection of twelve macroalgal species from the Central Red Sea. We used imaging-based High-Content Screening (HCS) with a diverse spectrum of cellular markers for detailed cytological profiling of fractionated algal extracts. The cytological profiles for 3 out of 60 algal fractions clustered closely to reference inhibitors and showed strong inhibitory activities on the HIV-1 reverse transcriptase in a single-enzyme biochemical assay, validating the suggested biological target...
March 20, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28330085/bioprospecting-and-biotechnological-applications-of-fungal-laccase
#6
REVIEW
Pooja Upadhyay, Rahul Shrivastava, Pavan Kumar Agrawal
Laccase belongs to a small group of enzymes called the blue multicopper oxidases, having the potential ability of oxidation. It belongs to enzymes, which have innate properties of reactive radical production, but its utilization in many fields has been ignored because of its unavailability in the commercial field. There are diverse sources of laccase producing organisms like bacteria, fungi and plants. In fungi, laccase is present in Ascomycetes, Deuteromycetes, Basidiomycetes and is particularly abundant in many white-rot fungi that degrade lignin...
June 2016: 3 Biotech
https://www.readbyqxmd.com/read/28321234/a-review-of-bioinformatics-tools-for-bio-prospecting-from-metagenomic-sequence-data
#7
REVIEW
Despoina D Roumpeka, R John Wallace, Frank Escalettes, Ian Fotheringham, Mick Watson
The microbiome can be defined as the community of microorganisms that live in a particular environment. Metagenomics is the practice of sequencing DNA from the genomes of all organisms present in a particular sample, and has become a common method for the study of microbiome population structure and function. Increasingly, researchers are finding novel genes encoded within metagenomes, many of which may be of interest to the biotechnology and pharmaceutical industries. However, such "bioprospecting" requires a suite of sophisticated bioinformatics tools to make sense of the data...
2017: Frontiers in Genetics
https://www.readbyqxmd.com/read/28314873/exploring-the-bioprospecting-and-biotechnological-potential-of-white-rot-and-anaerobic-neocallimastigomycota-fungi-peptidases-esterases-and-lignocellulolytic-enzymes
#8
REVIEW
Ronivaldo Rodrigues da Silva, Rafael Pedezzi, Tatiane Beltramini Souto
Fungi constitute an invaluable natural resource for scientific research, owing to their diversity; they offer a promising alternative for bioprospecting, thus contributing to biotechnological advances. For a long time, extensive information has been exploited and fungal products have been tested as a source of natural compounds. In this context, enzyme production remains a field of interest, since it offers an efficient alternative to the hazardous processes of chemical transformations. Owing to their vast biodiversity and peculiar biochemical characteristics, two fungal categories, white-rot and anaerobic Neocallimastigomycota, have gathered considerable attention for biotechnological applications...
March 17, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28279126/further-insight-into-the-bioactivity-of-the-freshwater-sponge-ochridaspongia-rotunda
#9
Aleksandra Talevska, Boris Pejin, Tanja Beric, Slavisa Stankovic
CONTEXT: Bioprospection has become a dynamic scientific field that explores novel possibilities for the implementation of natural products in medicine and pharmacy. Compared to marine species from all kingdoms, freshwater species have been highly neglected. OBJECTIVE: This work focuses on the screening of acetylcholinesterase inhibitory (AChE) and mutagenic activities of the acetone extract (obtained by maceration) of the freshwater sponge Ochridaspongia rotunda Arndt (Malawispongiidae) in vitro...
December 2017: Pharmaceutical Biology
https://www.readbyqxmd.com/read/28278662/antimicrobial-activity-of-saponins-produced-by-two-novel-endophytic-fungi-from-panax-notoginseng
#10
Zhaoxia Jin, Lin Gao, Lin Zhang, Tianyi Liu, Fang Yu, Zongshen Zhang, Qiong Guo, Biying Wang
Endophytes in plants may be co-producer of the bioactive compounds of their hosts. We conducted a study to bioprospect for saponin-producing endophytic fungi from Panax notoginseng and evaluate the antimicrobial activity of saponins. Two novel fungal endophytes, Fusarium sp. PN8 and Aspergillus sp. PN17, were isolated from traditional Chinese medicinal herb P. notoginseng. After eight days of fermentation, the total saponins produced in the culture broth of PN8 and PN17 were 1.061 and 0.583 mg mL(-1), respectively...
February 16, 2017: Natural Product Research
https://www.readbyqxmd.com/read/28273638/antimalarial-activity-and-safety-assessment-of-flueggea-virosa-leaves-and-its-major-constituent-with-special-emphasis-on-their-mode-of-action
#11
Shiv Vardan Singh, Ashan Manhas, Yogesh Kumar, Sonali Mishra, Karuna Shanker, Feroz Khan, Kumkum Srivastava, Anirban Pal
A clinical emergency stands due to the appearance of drug resistant Plasmodium strains necessitate novel and effective antimalarial chemotypes, where plants seem as the prime option, especially after the discovery of quinine and artemisinin. The present study was aimed towards bioprospecting leaves of Flueggea virosa for its antimalarial efficacy and active principles. Crude hydro-ethanolic extract along with solvent derived fractions were tested in vitro against Plasmodium falciparum CQ sensitive (3D7) and resistant (K1) strains, where all the fractions exhibited potential activity (IC50 values <10μg/mL) against both the strains...
March 5, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28272809/bioprospection-of-cold-adapted-yeasts-with-biotechnological-potential-from-antarctica
#12
María Martha Martorell, Lucas Adolfo Mauro Ruberto, Pablo Marcelo Fernández, Lucía Inés Castellanos de Figueroa, Walter Patricio Mac Cormack
The aim of this study was to investigate the ability to produce extracellular hydrolytic enzymes at low temperature of yeasts isolated from 25 de Mayo island, Antarctica, and to identify those exhibiting one or more of the evaluated enzymatic activities. A total of 105 yeast isolates were obtained from different samples and 66 were identified. They belonged to 12 basidiomycetous and four ascomycetous genera. Most of the isolates were ascribed to the genera Cryptococcus, Mrakia, Cystobasidium, Rhodotorula, Gueomyces, Phenoliferia, Leucosporidium, and Pichia...
March 8, 2017: Journal of Basic Microbiology
https://www.readbyqxmd.com/read/28254480/effects-of-dichloromethane-and-butanol-fractions-of-gochnatia-polymorpha-subsp-floccosum-in-maternal-reproductive-outcome-embryo-fetal-development-and-dna-integrity-in-mice
#13
Lucas Roberto Pessatto, Sarah Alves Auharek, Caroline Amélia Gonçalves, Natan de David, Antônio Carlos Duenhas Monreal, Cândida Aparecida Leite Kassuya, AndreiaAndréia Conceição Milan Brochado Antoniolli-Silva, Maria Élida Alves Stefanello, Rodrigo Juliano Oliveira
ETHNOPHARMACOLOGICAL RELEVANCE: Gochnatia polymorpha ssp. floccosa (Asteraceae) also known as ''Cambará'' is used as medicinal plant in Brazil to treat infections and inflammation. Previous studies showed that its ethanolic extract could be bioprospecting of a new anti-inflammatory phytotherapy for use during pregnancy. This work aimed to evaluate dichloromethane (DCM) and butanolic (BT) fractions from G. polymorpha on embryo-fetal development and DNA integrity in mice. MATERIALS AND METHODS: Female mice were treated with 50 and 20mg/kg of the DCM and BT fractions, respectively, during organogenesis and gestational period...
February 27, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28213548/effects-of-gelling-agent-and-extracellular-signaling-molecules-on-the-culturability-of-marine-bacteria
#14
Anita Mac Rygaard, Mariane Schmidt Thøgersen, Kristian Fog Nielsen, Lone Gram, Mikkel Bentzon-Tilia
Only 1 % of marine bacteria are currently culturable using standard laboratory procedures and this is a major obstacle for our understanding of the biology of marine microorganisms and for the discovery of novel microbial natural products. Therefore, the purpose of the present study was to investigate if improved cultivation conditions, including the use of an alternative gelling agent, and supplementation with signaling molecules, could improve the culturability of bacteria from seawater. Substituting agar with gellan gum improved viable counts 3 - 40-fold, depending on medium composition and incubation conditions, with a maximum of 6...
February 17, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28202318/corrigendum-to-bioprospecting-of-microalgae-proper-extraction-followed-by-high-performance-liquid-chromatographic-high-resolution-mass-spectrometric-fingerprinting-as-key-tools-for-successful-metabolom-characterization-j-chromatogr-b-1015-1016-2016-22-23
#15
Milena Stranska-Zachariasova, Petr Kastanek, Zbynek Dzuman, Josep Rubert, Michal Godula, Jana Hajslova
No abstract text is available yet for this article.
February 12, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28191021/phylogenetic-tree-analysis-of-the-cold-hot-nature-of-traditional-chinese-marine-medicine-for-possible-anticancer-activity
#16
Xianjun Fu, Xuxia Song, Xuebo Li, Kah Keng Wong, Jiaoyang Li, Fengcong Zhang, Changyun Wang, Zhenguo Wang
Traditional Chinese Marine Medicine (TCMM) represents one of the medicinal resources for research and development of novel anticancer drugs. In this study, to investigate the presence of anticancer activity (AA) displayed by cold or hot nature of TCMM, we analyzed the association relationship and the distribution regularity of TCMMs with different nature (613 TCMMs originated from 1,091 species of marine organisms) via association rules mining and phylogenetic tree analysis. The screened association rules were collected from three taxonomy groups: (1) Bacteria superkingdom, Phaeophyceae class, Fucales order, Sargassaceae family, and Sargassum genus; (2) Viridiplantae kingdom, Streptophyta phylum, Malpighiales class, and Rhizophoraceae family; (3) Holothuroidea class, Aspidochirotida order, and Holothuria genus...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/28168318/endophyte-bioprospecting-in-south-asian-medicinal-plants-an-attractive-resource-for-biopharmaceuticals
#17
REVIEW
Rabia Tanvir, Aqeel Javeed, Aamir Ghafoor Bajwa
From the last several years, there has been an increasing interest in plant-associated bacteria commonly referred to as endophytes that reside asymptomatically in the internal plant tissues. This interest peaked since the last two decades due to the recognition that endophytes within medicinal plants have the capability to mimic and produce the bioactive metabolites of the host plant. A number of medicinal plants have been used for centuries by the people of South Asia to cure various diseases and this has led to abundant usage experience...
March 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28164707/discovery-of-novel-antimicrobial-peptides-from-varanus-komodoensis-komodo-dragon-by-large-scale-analyses-and-de-novo-assisted-sequencing-using-electron-transfer-dissociation-mass-spectrometry
#18
Barney M Bishop, Melanie L Juba, Paul S Russo, Megan Devine, Stephanie M Barksdale, Shaylyn Scott, Robert Settlage, Pawel Michalak, Kajal Gupta, Kent Vliet, Joel M Schnur, Monique L van Hoek
Komodo dragons are the largest living lizards and are the apex predators in their environs. They endure numerous strains of pathogenic bacteria in their saliva and recover from wounds inflicted by other dragons, reflecting the inherent robustness of their innate immune defense. We have employed a custom bioprospecting approach combining partial de novo peptide sequencing with transcriptome assembly to identify cationic antimicrobial peptides from Komodo dragon plasma. Through these analyses, we identified 48 novel potential cationic antimicrobial peptides...
February 24, 2017: Journal of Proteome Research
https://www.readbyqxmd.com/read/28160134/bacterial-and-fungal-proteolytic-enzymes-production-catalysis-and-potential-applications
#19
REVIEW
Ronivaldo Rodrigues da Silva
Submerged and solid-state bioprocesses have been extensively explored worldwide and employed in a number of important studies dealing with microbial cultivation for the production of enzymes. The development of these production technologies has facilitated the generation of new enzyme-based products with applications in pharmaceuticals, food, bioactive peptides, and basic research studies, among others. The applicability of microorganisms in biotechnology is potentiated because of their various advantages, including large-scale production, short time of cultivation, and ease of handling...
February 3, 2017: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/28154939/a-practical-guide-to-recombineering-in-photorhabdus-and-xenorhabdus
#20
Jia Yin, Hailong Wang, Ruijuan Li, Vinothkannan Ravichandran, Xiaoying Bian, Aiying Li, Qiang Tu, A Francis Stewart, Jun Fu, Youming Zhang
Fluent genetic manipulation of prokaryote genomes is still limited to only a few commonly used hosts. Ideally the advanced technologies available for cloning into recombinant Escherichia coli should also be applicable in other prokaryotes. In particular, 'recombineering' is mediated by the lambda Red operon that permits fluent and precise engineering of the E. coli genome and associated recombinant DNA. The major limitation is that host-specific phage-derived recombination systems are also required in more distant species...
February 3, 2017: Current Topics in Microbiology and Immunology
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