Protocols in Actinobacterial Research
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II. Dereplication and ex situ conservation of actinobacteriao Dereplicationo Colony morphologyo Micromorphologyo FT-IR analysiso RFLP analysiso Ex situ conservationo Slant stocko Glycerol stocko Soil stocko Lyophilisationo Immobilized beads
III. Characterization and identification of actinobacteriao Phenotypic characterizationo Microscopico Culturalo Physiologicalo Chemotaxonomic analysiso Cell wall amino acidso Cell wall sugarso Cell wall lipidso FAME analysiso Menaquinone analysiso Molecular characterizationo DNA isolationo PCR Amplification of 16s rRNA geneo Sequencingo BLAST analysiso GenBank Submissiono Phylogenetic tree construction
IV. Metagenomic analysis of uncultured actinobacterial diversityo Sample collectiono DNA isolationo Amplificationo Clone library constructiono Sequencingo Metagenomic analysiso GenBank submission
V. Screening of actinobacteria for biological activitieso Screening for antimicrobial activityo Cross streak methodo Agar plug methodo Well diffusiono Disc diffusiono Broth dilution method - MTP Assayo MABAo Screening for antiinfective or anti-inflammatory activityo Screening for anti TB activityo Agar dilutiono LRP assayo Broth dilution methodo Bactec MGIT 960o Screening for anticancer activityo MTT assayo Dual stainingo Neutral red uptake assayo Lactic acid dehydrogenase assayo Tryphan blue uptake assayo DNA fragmentationo Screening for antiviral activityo MTT assayo P24 Assayo Plague assayo Screening for antioxidant activityo DPPH assayo Nitric oxide scavenging activityo Metal chelating assayo Total antioxidant assayo Hydrogen peroxide scavenging assayo Screening for pigment productiono Screening for enzyme inhibitorso Screening for mosquitocidal activityo Screening for enzyme productiono Screening for biosurfactant production - please mention different methodsHemolytic assay, bacterial adhesion to hydrocarbons (BATH) assay, drop collapse assay, oilspreading assay, emulsification assay and surface tension measuremento Screening for Quorum Sensing (QSI)o Screening for sideromycins productiono Screening for antibiofilm activity
VI. Production of bioproducts from actinobacteriao Fermentation methodso Agar surface fermentationo Solid state fermentationo Submerged fermentationo Production using immobilized cellso Extraction of bioactive metaboliteso Liquid liquid extractiono Solid liquid extractiono Precipitationo Production optimizationo Classical one-factor-at-a-time methodo Plackett-Burman modelo Response Surface Methodology (RSM)o Kinetics of antibiotic production - add few more kinetic experiments
VII. Eliciting cryptic metabolite productiono OSMAC approacho Inducing cryptic metabolite production using elicitorso Epigenetic modifierso Microparticle enhanced cultivation
VIII. Metabolite profiling of actinobacterial extractso TLCo HPTLCo UV spectral analysiso GC-MS analysiso LC-MS analysis
IX. Bioassay guidedisolation and characterization of metabolites from actinobacteriao Bioassay guided isolationo Preparative TLCo Column chromatographyo Preparative HPLCo Characterization of bioactive metabolites from actinobacteriao Physico-chemical Colour, consistency, solubility Melting point analysis Chemical screening Test for functional groups CHN analysiso Spectral analysis - UV, IR and NMRo XRD analysis
X. Evaluation of actinobacteria for environmental applicationso Heavy metal resistant/accumulationo Pesticide degradation (qualitative & quantitative)o Dye decolourization (qualitative & quantitative)o Plastic degradation(qualitative & quantitative)o Bioleaching of heavy metals from e-wasteo Anticorrosion activityo Antibiofouling activity - antimicrobial, inhibition of mollusc foot adherence, inhibition ofalgal spore germination, field testingo Screening of Co2 sequestration
XI. Evaluation of actinobacteria for agricultural applicationso Pre-experimental screeningo Antagonistic activity against phyto pathogenso PGP properties (IAA production, siderophore production)o Soil fertility enhancement (N2 fixation, P & Zn solubilisation, extracellular enzymeproduction)o Experimental screeningo Non-pathogenic test in plantso Green house experimento Field experiment
XII. Evaluation of actinobacteria for aquaculture applicationso Preexperimental screeningo Antagonistic activityo Acid toleranceo Bile toleranceo Cell adherence propertyo Non haemolytic propertyo pH toleranceo Experimental screeningo Non pathogenic testo Lab scale challenging test for probiotic properties & response measurementXIII.Evaluation of actinobacteria for nanoparticle synthesiso Screening of actinobacteria for nanoparticle synthesis usingo Biomasso Cell free supernatanto Extractso Characterization of nanoparticleso Spectralo Microscopic
XIV. Determination of cytotoxicity of actinobacterial extracts & metaboliteso Cell line based assayso Zebra fish modelo In vivo Animal model
Dr. Manikkam Radhakrishnan is a microbiologist pursuing research on Ecology, Systematics and Bioprospecting of actinobacteria from under studied ecosystems across India for the past two decades. He obtained his Doctoral degree in Microbiology from National Institute for Research in Tuberculosis under University of Madras on "Antitubercular metabolites from Desert soil Streptomyces". After his Post graduation, he started his career as Assistant Professor in Microbiology. He is passionate about research and joined at Centre for Drug Discovery and Development, Sathyabama Institute of Science and Technology in the year 2013. He set up a consortium of >500 actinobacterial cultures under his headship in Bioprospecting division. He has isolated a novel chromopeptide molecule, Transitmycin which is effective against TB and HIV, from a novel marine Streptomyces species R2 isolated from Coral reef ecosystem of South India.. At present he is working on Diversity and Taxonomy of Psychrophilic and psychrotolerant actinobacteria from Indian sector of Southern Ocean (Antarctic). He is participating as the scientific member (Microbiology) in the 11th Indian Scientific Expedition to Southern Ocean. He has authored 110 publications including research articles, reviews, book chapters and magazine articles and has also three patents on actinobacteria to his credit. It is his vision that this gold mine of Actinobacterial resource should be best exploited for the welfare of humans, animals, aquaculture and environmental applications since it has proven therapeutic potential and translational scope.
Dr. Thangavel Shanmugasundaram has completed his Masters in Microbiology with gold medal from Periyar University. He has received prestigious INSPIRE fellowship from DST-SERB to pursue his doctoral degree on Exploring magnesite soil actinobacteria for metal and metal alloy nanoparticles for its biomedical and environmental applications. He also received Best Ph.D Thesis award for his meritorious Doctoral thesis. He has published 31 research articles on actinobacteria in high impact. Based on his outstanding publications on actinobacteria and nanotechnology he received DST-National Post doctoral fellowship to work on actinobacteria and its enzymes for nanoparticle synthesis and applications at the DRDO Bharathiar University Centre for Life Sciences, He has a great scientific acumen and aptitude and dedicated research in the field for a decade.
Dr. Venugopal Gopikrishnan is working in the field of actinobacterial research for the past 8 years. He obtained his Doctoral degree from Actinobacterial Research Lab, Department of Microbiology, Periyar University. During his doctoral degree, he isolated about 200 actinobacterial cultures from marine and mangrove ecosystems of South India. He has identified Quercetin and Taxifolin two active metabolites from two potential Streptomyces sp PE7 and PM33 which have showed promising antifouling and antimicrobial activity. The active molecules have evidenced good antimicrobial, anti TB and anti-cancer activities. He started his career as scientist in Bioprospecting division of Centre for Drug Discovery and Development at Sathyabama Institute of Science and Technology. At present he is continuing his research on exploring the fish gut associated actinobacteria for quorum sensing inhibitors and antibiofilm compounds. He has published 29 articles including research articles, reviews, book chapters and magazine articles. His aim is to explore the host or symbiotic actinobacteria marine and terrestrial organisms for bioprospecting purposes.
Dr. Joseph Jerrine has completed her under graduation with gold medal from St. Ann's College, Visakhapatnam, Andhra University majoring in Biochemistry, Botany and Chemistry. She has done her Masters in Life sciences from Pondicherry Central University. She also cleared GATE 2000 with 98.6 percentile and UGC-NET. She obtained the Doctor of Philosophy from University of Madras in 2011 for her research on Human Pappiloma Virus (HPV) 16 & 18 with respect to cervical cancer. She is the recipient of the ICMR -Senior Research Fellowship for "Establishment of National Database on TB". Further, she has been awarded ICMR-Post Doctoral Fellowship for "Anti TB metabolites from marine Streptomycetes. She has published 40 research articles on actinobacteria and plants with reference to anti TB and other biomedical activities, cancer and asthma. She is recipient of three research projects from central and state funding agencies to work on actinobacteria with special reference to anti TB metabolites. Presently she is working as Scientist D and heading the Centre for Drug Discovery and Development, Sathyabama Institute of Science and Technology, TamilNadu with focused research on bioprospecting of actinobacteria and plants from rare ecosystems in India with reference to anti TB and anti cancer molecules.