keyword
MENU ▼
Read by QxMD icon Read
search

Actinomycetes

keyword
https://www.readbyqxmd.com/read/28936706/biodiversity-and-ecology-of-flower-associated-actinomycetes-in-different-flowering-stages-of-protea-repens
#1
Zander R Human, Casparus J Crous, Francois Roets, Stephanus N Venter, Michael J Wingfield, Z Wilhelm de Beer
Actinomycete bacteria have previously been reported from reproductive structures (infructescences) of Protea (sugarbush/suikerbos) species, a niche dominated by fungi in the genera Knoxdaviesia and Sporothrix. It is probable that these taxa have symbiotic interactions, but a lack of knowledge regarding their diversity and general ecology precludes their study. We determined the diversity of actinomycetes within Protea repens inflorescence buds, open inflorescences, young and mature infructescences, and leaf litter surrounding these trees...
September 21, 2017: Antonie Van Leeuwenhoek
https://www.readbyqxmd.com/read/28935203/hr-lc-ms-based-analysis-of-two-antibacterial-metabolites-from-a-marine-sponge-symbiont-streptomyces-pharmamarensis-icn40
#2
Francis-Joseph Rosemary Sharmila Joseph, Appadurai Muthamil Iniyan, Samuel Gnana Prakash Vincent
On the effort to screen antibiotics against Methicillin resistant Staphylococcus aureus (MRSA), an actinomycete strain which can produce bactericidal compound was isolated from a marine sponge of Kanyakumari Coast, India. Two anti-MRSA compounds (PVI401 and PVI402) were isolated from the fermentation plates of Streptomyces pharmamarensis ICN40. TLC bioautography analysis yielded two active spots with Rf value of 0.75 (PVI401) and 0.8 (PVI402) from the crude extract. Both the compounds were characterized by HR-LC-MS analysis...
September 18, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28932210/antibacterial-activity-of-endophytic-actinomycetes-isolated-from-the-medicinal-plant-vochysia-divergens-pantanal-brazil
#3
Francielly M W R Gos, Daiani C Savi, Khaled A Shaaban, Jon S Thorson, Rodrigo Aluizio, Yvelise M Possiede, Jürgen Rohr, Chirlei Glienke
Endophytic actinomycetes from medicinal plants produce a wide diversity of secondary metabolites (SM). However, to date, the knowledge about endophytes from Brazil remains scarce. Thus, we analyzed the antimicrobial potential of 10 actinomycetes isolated from the medicinal plant Vochysia divergens located in the Pantanal sul-mato-grossense, an unexplored wetland in Brazil. Strains were classified as belonging to the Aeromicrobium, Actinomadura, Microbacterium, Microbispora, Micrococcus, Sphaerisporangium, Streptomyces, and Williamsia genera, through morphological and 16S rRNA phylogenetic analyzes...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28924834/diversity-of-family-gh46-chitosanases-in-kitasatospora-setae-km-6054
#4
Mina Zitouni, Pascal Viens, Mariana G Ghinet, Ryszard Brzezinski
The genome of Kitasatospora setae KM-6054, a soil actinomycete, has three genes encoding chitosanases belonging to GH46 family. The genes (csn1-3) were cloned in Streptomyces lividans and the corresponding enzymes were purified from the recombinant cultures. The csn2 clone yielded two proteins (Csn2BH and Csn2H) differing by the presence of a carbohydrate-binding domain. Sequence analysis showed that Csn1 and Csn2H were canonical GH46 chitosanases, while Csn3 resembled chitosanases from bacilli. The activity of the four chitosanases was tested in a variety of conditions and on diverse chitosan forms, including highly N-deacetylated chitosan or chitosan complexed with humic or polyphosphoric acid...
September 18, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28923606/actinomycetes-benefaction-role-in-soil-and-plant-health
#5
REVIEW
Asma Absar Bhatti, Shamsul Haq, Rouf Ahmad Bhat
Actinomycetes are aerobic, spore forming gram-positive bacteria, belonging to the order actinomycetales characterized with substrate and aerial mycelium growth. They are the most abundant organisms that form thread-like filaments in the soil and are responsible for characteristically "earthy" smell of freshly turned healthy soil. They play major roles in the cycling of organic matter; inhibit the growth of several plant pathogens in the rhizosphere and decompose complex mixtures of polymer in dead plant, animal and fungal material results in production of many extracellular enzymes which are conductive to crop production...
September 16, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28920834/streptomyces-xylanilyticus-sp-nov-isolated-from-soil
#6
Duangtip Moonmangmee, Pawina Kanchanasin, Wongsakorn Phongsopitanun, Somboon Tanasupawat, Somporn Moonmangmee
A novel actinomycete, strain SR2-123T, belonging to the genus Streptomyces, was isolated from a soil sample collected from the Sakaerat Environmental Research Station, Thailand Institute of Scientific and Technological Research, Nakhon Ratchasima Province, Thailand. The taxonomic position of the strain was characterized using a polyphasic study. Strain SR2-123T contained ll-diaminopimelic acid, glucose, mannose and ribose in whole-cell hydrolysates. The N-acyl type of muramic acid was acetyl. Menaquinones were MK-9(H6), MK-9(H8) and MK-9(H4)...
September 18, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28920833/longispora-urticae-sp-nov-isolated-from-rhizosphere-soil-of-urtica-urens-l-and-emended-descriptions-of-the-species-longispora-albida-and-longisporafulva
#7
Chenyu Piao, Liying Jin, Junwei Zhao, Chongxi Liu, Yue Zhao, Xiangjing Wang, Wensheng Xiang
Two Gram-stain-positive, aerobic actinomycete strains, designated NEAU-PCY-3T and NEAU-PCY-4, were isolated from rhizosphere soil of Urtica urens L. collected from Anshan, Liaoning Province, northeast PR China. The 16S rRNA gene sequence analysis showed that the two strains exhibited 99.9 % 16S rRNA gene sequence similarity with each other and that they were most closely to Longispora fulva DSM 45356T (98.7, 98.9 %) and Longispora albida JCM 11711T (97.1, 97.2 %). Phylogenetic analysis based on the 16S rRNA gene sequences indicated that the two strains were located in the same lineage and formed a cluster with the genus Longispora...
September 18, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28920832/salinifilum-gen-nov-with-description-of-salinifilum-proteinilyticum-sp-nov-an-extremely-halophilic-actinomycete-isolated-from-meighan-wetland-iran-and-reclassification-of-saccharopolyspora-aidingensis-as-salinifilum-aidingensis-comb-nov-and-saccharopolyspora
#8
Mahdi Moshtaghi Nikou, Mohaddaseh Ramezani, Sharareh Harirchi, Somayyeh Makzoom, Mohammad Ali Amoozegar, Seyed Abolhassan Shahzadeh Fazeli, Peter Schumann, Antonio Ventosa
A Gram-positive, halophilic actinobacterial strain Miq-12T was isolated from Meighan wetland in Iran. Strain Miq-12T was strictly aerobic, catalase positive and oxidase negative. The isolate grew at 12-25 % NaCl, at 30-50 °C and pH 5.5-10.5. The optimum NaCl, temperature and pH for growth were 15-20 %, 40 °C and 7.0-8.0, respectively. The cell wall of strain Miq-12T contained meso-diaminopimelic acid as diagnostic diamino acid and arabinose as whole-cell sugar. The polar lipid pattern consisted of diphosphatidylglycerol, phosphatidylglycerol, phosphatidylcholine and phosphatidylinositol...
September 18, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28918535/bioprospecting-of-novel-and-bioactive-compounds-from-marine-actinomycetes-isolated-from-south-china-sea-sediments
#9
Na Yang, Fuhang Song
Marine actinomycetes are less investigated compared to terrestrial strains as potential sources of natural products. To date, few investigations have been performed on culturable actinomycetes associated with South China Sea sediments. In the present study, twenty-eight actinomycetes were recovered from South China Sea sediments after dereplication by traditional culture-dependent method. The 16S rRNA gene sequences analyses revealed that these strains related to five families and seven genera. Twelve representative strains possessed at least one of the biosynthetic genes coding for polyketide synthase I, II, and nonribosomal peptide synthetase...
September 16, 2017: Current Microbiology
https://www.readbyqxmd.com/read/28913769/plantactinospora-solaniradicis-sp-nov-a-novel-actinomycete-isolated-from-the-root-of-a-tomato-plant-solanum-lycopersicum-l
#10
Wenchao Li, Xiaowei Guo, Linlin Shi, Junwei Zhao, Liangliang Yan, Xiaotong Zhong, Chen Zhang, Yufei Chen, Xiangjing Wang, Wensheng Xiang
A Gram-positive, non-motile actinomycete, designated strain NEAU-FJL1(T), was isolated from tomato root (Solanum lycopersicum L.) collected from Harbin, Heilongjiang province, north China. The strain formed single spores with smooth surfaces from substrate mycelia. Phylogenetic analysis based on 16S rRNA gene sequences indicated that strain NEAU-FJL1(T) should be affiliated with the genus Plantactinospora and forms a distinct branch with its close neighbour Plantactinospora soyae NEAU-gxj3(T) (99.2% sequence similarity)...
September 14, 2017: Antonie Van Leeuwenhoek
https://www.readbyqxmd.com/read/28905706/classification-of-actinoplanes-sp-atcc-33076-an-actinomycete-that-produces-the-glycolipodepsipeptide-antibiotic-ramoplanin-as-actinoplanes-ramoplaninifer-sp-nov
#11
Giorgia Letizia Marcone, Elisa Binda, Marcella Reguzzoni, Luciano Gastaldo, Claudia Dalmastri, Flavia Marinelli
Strain ATCC 33076, which produces the antibiotic ramoplanin, was isolated from a soil sample collected in India, and it was classified as a member of the genus Actinoplanes on the basis of morphology and cell-wall composition. A phylogenetic analysis based on 16S rRNA gene sequences indicated that the strain forms a distinct clade within the genus Actinoplanes, and it is most closely related to Actinoplanes deccanensis IFO 13994T (98.71 % similarity) and Actinoplanes atraurantiacus Y16T (98.33 %). The strain forms an extensively branched substrate mycelium; the sporangia are formed very scantily and are globose with irregular surface...
September 14, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28895524/nocardioides-kandeliae-sp-nov-an-endophytic-actinomycete-isolated-from-leaves-of-kandelia-candel
#12
Jun Liu, Fei Li, Cheng-Hai Gao, Yu Han, Huili Hao, Xiang-Xi Yi, Ri-Ming Huang
A Gram-stain-positive, aerobic, non-spore-forming, atrichous and short rod-shaped endophytic actinomycete, designated strain BGMRC 2075T, was isolated from the leaves of Kandelia candel, and was subjected to polyphasic characterization to unravel its taxonomic position. Phylogenetic analyses based on 16S rRNA gene sequences indicated that strain BGMRC 2075T belongs to the genus Nocardioides,showing the highest 16S rRNA gene sequence similarity to Nocardioides aestuarii JC2056T (96.1 %), Nocardioides agariphilus MSL-28T (95...
September 12, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28895358/-influence-of-oil-pollution-on-soil-microbial-community-diversity
#13
Xiaolou Li
Bacteria, actinomycetes and fungi are the three major groups of soil microbes. Soil microbes play a critical role in ecological and biodegradation processes in petroleum-contaminated soils. Based on the actual situation, this study took the oil polluted soil around the abandoned oil well in Shehong County, Suining City, Sichuan Province as the test soil. First, we determined the physiochemical properties of the tested soil; then we analyzed the changes of physiochemical properties and the three major microbes in petroleum contaminated soils...
June 25, 2017: Sheng Wu Gong Cheng Xue Bao, Chinese Journal of Biotechnology
https://www.readbyqxmd.com/read/28892017/biodiversity-of-actinobacteria-from-the-south-pacific-and-the-assessment-of-streptomyces-chemical-diversity-with-metabolic-profiling
#14
Andrés Cumsille, Agustina Undabarrena, Valentina González, Fernanda Claverías, Claudia Rojas, Beatriz Cámara
Recently, bioprospecting in underexplored habitats has gained enhanced focus, since new taxa of marine actinobacteria can be found, and thus possible new metabolites. Actinobacteria are in the foreground due to their versatile production of secondary metabolites that present various biological activities, such as antibacterials, antitumorals and antifungals. Chilean marine ecosystems remain largely unexplored and may represent an important source for the discovery of bioactive compounds. Various culture conditions to enrich the growth of this phylum were used and 232 bacterial strains were isolated...
September 11, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28890887/isolation-and-characterization-of-actinobacteria-from-algerian-sahara-soils-with-antimicrobial-activities
#15
Harir Mohamed, Bellahcene Miloud, Fortas Zohra, José María García-Arenzana, Antonio Veloso, Susana Rodríguez-Couto
Extreme ecosystems can be a source of untapped microorganisms to produce novel bioactive compounds of industrial interest. Consequently, in this work, 32 actinomycetes were isolated from 6 soil samples collected from Algerian Sahara in searching for untapped producers of novel antimicrobial compounds. All the isolates were further subjected to antimicrobial screening against pathogenic bacteria, yeast and fungi. The obtained results indicated that three of the isolates (named C, MS1 and 10) showed antimicrobial activities against most of the tested pathogenic microorganisms...
2017: International Journal of Molecular and Cellular Medicine
https://www.readbyqxmd.com/read/28884662/streptomyces-cerasinus-sp-nov-isolated-from-soil-in-thailand
#16
Pawina Kanchanasin, Duangtip Moonmangmee, Wongsakorn Phongsopitanun, Somboon Tanasupawat, Somporn Moonmangmee
A novel actinomycete, strain SR3-134T, belonging to the genus Streptomyces, was isolated from soil collected from the Sakaerat Environmental Research Station, Thailand Institute of Scientific and Technological Research, Nakhon Ratchasima Province, Thailand. The taxonomic position of the strain was characterized by using a polyphasic approach. ll-Diaminopimelic acid, glucose, mannose and ribose were detected in its whole-cell hydrolysates. The N-acyl type of muramic acid was acetyl. The menaquinones were MK-9(H8), MK-9(H6), MK-9(H4) and MK-9(H2)...
September 8, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28884066/actinomycetes-mediated-synthesis-of-gold-nanoparticles-from-the-culture-supernatant-of-streptomyces-griseoruber-with-special-reference-to-catalytic-activity
#17
V R Ranjitha, V Ravishankar Rai
Biogenic synthesis of nanoparticles has received a tremendous attention from the past few decades. The significant progress in the field of nanotechnology has resulted in a cost-effective and eco-friendly process for nanoparticle synthesis. In the present study, the extracellular synthesis of gold nanoparticles was carried out using culture supernatant of Streptomyces griseoruber, actinomycetes isolated from the soil. Bioreduction of gold nanoparticles was confirmed by UV-visible spectrophotometer that showed the peak between 520 and 550 nm...
October 2017: 3 Biotech
https://www.readbyqxmd.com/read/28880091/mycolic-acid-containing-bacterium-stimulates-tandem-cyclization-of-polyene-macrolactam-in-a-lake-sediment-derived-rare-actinomycete
#18
Shotaro Hoshino, Masahiro Okada, Takayoshi Awakawa, Shumpei Asamizu, Hiroyasu Onaka, Ikuro Abe
Two novel macrolactams, dracolactams A and B, were identified from a combined-culture of Micromonospora species and a mycolic-acid containing bacterium (MACB). Their structures and stereochemistries were completely assigned, based on spectroscopic analyses and chemical derivatization. Both dracolactams were probably generated from a common macrolactam precursor produced by the Micromonospora species. In this combined-culture system, MACB is likely to activate cryptic oxidase genes in the Micromonospora species and induce the downstream polyene macrolactam cyclization...
September 7, 2017: Organic Letters
https://www.readbyqxmd.com/read/28879846/promicromonospora-soli-sp-nov-a-novel-actinomycete-isolated-from-soil
#19
Weiwei Zheng, Dongmei Li, Junwei Zhao, Chongxi Liu, Yue Zhao, Wensheng Xiang, Xiangjing Wang
A novel actinobacterium, designated strain NEAU-GS50T, was isolated from soil collected from Mount Song and characterized by using a polyphasic approach. Phylogenetic analysis based on the 16S rRNA gene sequence indicated that the organism should be assigned to the genus Promicromonospora and that it forms a monophyletic clade with its closest relatives Promicromonospora umidemergens JCM 17975T (98.94 % 16S rRNA gene sequence similarity), Promicromonospora alba 1C-HV12T (98.82 %) and Promicromonospora kermanensis DSM45485T (98...
September 7, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28875906/nocardia-heshunensis-sp-nov-an-actinomycete-isolated-from-soil
#20
Jian-Rong Huang, Hong Ming, Yan-Yan Duan, Shuai Li, Ling-Yu Zhang, Wei-Li Ji, Zhuo-Li Zhao, Xiao-Lin Meng, Wen-Jun Li, Guo-Xing Nie
A novel Gram-stain-positive, aerobic, non-motile and acid-fast actinomycete strain, designated CFH S0067T, was isolated from a soil sample collected from Heshun old town in Tengchong, Yunnan province, in south-west PR China. The taxonomic position of strain CFH S0067T was studied in detail using a polyphasic approach. Phylogenetic analysis, based on 16S rRNA gene sequences, revealed that strain CFH S0067T belongs to the genus Nocardia and is closely related to Nocardia concava JCM 12351T (99.3 % similarity), forming a separated branch with this type strain...
September 2017: International Journal of Systematic and Evolutionary Microbiology
keyword
keyword
95528
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"