International conference on bioinformatics of genome regulation
Download 3.91 Kb. Pdf ko'rish
|
Key words: miRNA, miRNA regulation, targets, hexokinase 2, glycolysis, colorectal cancer Glucose uptake and glycolytic rate increase significantly in cancer cells. Metabolic shift toward aerobic glycolysis is associated with the increased synthesis of glycolytic en- zymes, mainly hexokinases (HKs), in many types of cancer. In previous study we had shown opposite effect – the decrease of HK2 gene expression at mRNA level in colorec- tal cancer (CRC). HK2 is the key glycolytic enzyme that can regulate rates of glycolysis in proliferating cancer cells. Thus, the mechanisms of regulating HK2 gene expression are of particular interest to study. Using CrossHub software we have carried out the anal- ysis of the Cancer Genome Atlas (TCGA) project data to find miRNAs that potentially regulate HK2 gene expression. We identified a number of miRNAs with predicted or validated binding sites in HK2 transcripts (using TargetScan, mirSVR, PicTar, DIANA microT, and miRTarBase) and strong negative expression correlations. Using real-time polymerase chain reaction (qPCR) we estimated expression of these miRNA in CRC. We confirmed increased expression of miR-143-3p, miR-9-5p, and miR-98-5p. Spear- man’s rank correlation coefficients between HK2 mRNA level and miRNAs expression were r=-0.4, r=-0.32, and r=-0.36, accordingly. Thus, in present study we showed that mRNA of HK2 gene is a potential target for miR-9-5p and miR-98-5p. These miRNAs could mediate the inhibition of the HK2 gene expression in CRC. Our results on miR- 143 are consistent with the literature date. This work was financially supported by grant 14-15-01083 from the Russian Science Foundation. Part of this work was performed using the equipment of EIMB RAS “Ge- nome” center (http://www.eimb.ru/rus/ckp/ccu_genome_c.php) 288 THE TENTH INTERNATIONAL CONFERENCE ON BIOINFORMATICS OF GENOME REGULATION AND STRUCTURE\SYSTEMS BIOLOGY ANALYSIS OF A POWERFUL CONSTITUTIVE PROMOTER IN CULTURED CELLS OF POLYPEDILUM VANDERPLANKI Y. Sogame 1, 2 *, Y. Miyata 1, 3 , R. Deviatiiarov 4 , S. Kikuta 5 , R. Cornette 1 , O. Gusev 4, 6 , T. Furusawa 1 , T. Kikawada 1, 7 1 Institute of Agrobiological Sciences, NARO, Japan 2. JSPS Research Fellow, 3. Center for Biological Resources and Informatics, Tokyo Institute of Technology, 4. Institute of Fundamental Medicine and Biology, Kazan Federal University, Russia 5 Graduate School of Bio-Applications and Systems Engineering, Tokyo University of Agriculture and Technology, Tokyo, Japan 6 Preventive Medicine & Diagnosis Innovation Program (PMI), RIKEN, Japan 7 Department of Integrated Biosciences, Graduate School of Frontier Sciences, University of Tokyo, Japan * Corresponding author: kikawada @ affrc.go.jp Key words: anhydrobiosis, sequencing, CAGE Motivation and Aim: Larvae of an African chironomid Polypedilum vanderplanki are known as the only insect having an ability of the extreme desiccation tolerance, anhy- drobiosis. As the draft genome analysis (1) of P. vanderplanki has been accomplished, the molecular mechanisms underlying anhydrobiosis has been gradually elucidated. Ge- nome editing technology would be a powerful tool to reveal the mechanisms of anhy- drobiosis, but the existing gene expression systems haven’t worked in P. vanderplanki so far. In this study, we identified one of the strongest constitutive promoters in a culture cell line of P. vanderplanki, Pv11 cells, to establish effective gene expression system. Methods and Algorithms: We found two types of constitutive expression promoter. Based on the transcriptome analysis of the larvae, glyceraldehyde3-phosphate dehydro- genase (PvGapdh) promoter was identified. Promoter of Pv.00443 gene in the scaffold no. 121 of the genome database was selected by the CAGE (cap analysis of gene expres- sion) analysis of Pv11 cells. Results: The transcriptome analysis of the larvae showed that gene for PvGapdh was the most highly expressed in the larvae. We constructed a novel expression vector containing 5’-upstream region of PvGapdh as a promoter. How- ever, the expression efficiency of the promoter was slightly weaker to express exogenous genes in Pv11 cells. There is a possibility that the difference of the gene expression sys- tem between the larvae and the cultured cell line should result in the inadequate expres- sion. To isolate the strangest expressed genes in Pv11 cells, CAGE analysis of Pv11 were performed. As a results, Pv.00443 gene was the highest constitutively expressed gene in Pv11 cells, whereas PvGapdh was moderately expressed in the cell line. We constructed another novel expression vector containing 5’-upstream region of Pv.00443 gene. Con- sequently, we confirmed sufficient expression of exogenous GFP protein in Pv11 cells with a flow cytometry. Conclusion: In Pv11 cells, Pv.00443 gene was the highest con- stitutively expressed gene. We constructed an effective novel constitutive expression vector using the promoter region of Pv.00443 gene. Availability: This novel expression vector will be a practical tool to reveal molecular mechanisms of anhydrobiosis in Pv11. Acknowledgements: This work was financially supported by a Basic Scientific Research Grant (#140890) from Sumitomo foundation, by a Research Fellowship from the Ja- pan Society for the Promotion of Science (JSPS) for Young Scientists (#13J08784 and 16J09151) and JSPS KAKENHI (16K18827, 16K15073 and 25252060). 289 THE TENTH INTERNATIONAL CONFERENCE ON BIOINFORMATICS OF GENOME REGULATION AND STRUCTURE\SYSTEMS BIOLOGY DENOVO ASSEMBLY OF NUCLEAR GENOME OF THE SMALLEST INSECT MEGAPHRAGMA AMALPHITANUM (HYMENOPTERA: TRICHOGRAMMATIDAE) A.S. Sokolov 1 *, A.V. Nedoluzhko 2 , F.S. Sharko 1 , E.S. Boulygina 2 , S.V. Tsygankova 2 , A.M. Mazur 1 , A.A. Polilov 3 , E.B. Prokhortchouk 1, 2 , K.G. Skryabin 1, 2, 3 1 Federal State Institution «Federal Research Centre «Fundamentals of Biotechnology» of the RAS 2 National Research Centre “Kurchatov Institute” 3 Faculty of Biology, Lomonosov Moscow State University * Corresponding author: sokolovbiotech@gmail.com Keywords: Hymenoptera, Megaphragma amalphitanum, Trichogrammatidae, nulcear genome, parasitic wasp Motivation and Aim: De novo assembly and annotation of M. amalphitanum nuclear genome. Elucidation of miniaturization effects and also gene ontology of obtained as- sembly. Metagenomic analysis. Methods and Algorithms: For de novo assembly we used 204,377,666 paired-end reads (length 150 bp) obtained in the sequencer Illumi- na HiSeq1500. Reads have been merged using Pear software package (Zhang et al., 2014), followed by the error correction using SoapCorrection(Luo et al., 2012). De novo assembly was performed using SPAdes (Bankevich et al., 2012), which allowed to collect 158,907 contigs (N50 = 6757 bp). With SOAP de novo we collected 107,373 scaffolds (N50 = 10,155 bp). Results: Using data from genome sequencing of parasitic wasp M. amalphitanum, we conducted a gene ontology study of uncovered genes of the honeybee (Apis mellifera), as the closest organism being studied with an annotated ge- nome. We also analyzed as a control genomic reads of large parasitic wasps of the family Braconidae: Cotesia vestalis, Fopius arisanus and Trioxys pallidus. This approach did not reveal any genomic regions of M. amalphitanum, which could be the key to unlock- ing the miniaturization process. On this basis, it was decided to conduct the analysis of positive selection using contigs and scaffolds of M. amalphitanum, collected de novo. During the analysis of genomic data we isolated gene sequences that encodes chemo- receptors, olfactory Odorant Receptors, flavoring (Gustatory Receptors) and inotropic (Ionotropic Receptors) receptors. Protein sequences of these receptors together with similar sequences from other Hymenoptera will later be used in the comparative analy- sis of the evolution that will make it possible to understand the changes associated with miniaturization. Metagenomic analysis of M. amalphitanum identified representatives of the following genera of bacteria: Corynebacterium, Propionibacterium, Propionibac- terium, Chryseobacterium, Acinetobacter, and Anaerococcus. We have not found the genera Wolbachia (Wolbachiaceae) and Arsenophonus (Enterobacteriaceae) detected previously in a parasitic wasp Nasonia vitripennis. Acknowledgements: This work is supported by the Russian Science Foundation (Grant No. 14-24-00175). References: 1. Zhang J, Kobert K, Flouri T, et al. PEAR: a fast and accurate Illumina Paired-End reAd merger // Bio- informatics 2014. 30(5):614-20. 2. Luo R, Liu B, Xie Y, et al. SOAPdenovo2: an empirically improved memory-efficient short-read de novoassembler // Gigascience 2012. 1(1):18. 3. Bankevich A, Nurk S, Antipov D, et al. SPAdes: a new genome assembly algorithm and its applications to single-cell sequencing // J Comput Biol 2012. 19:455-77. 290 THE TENTH INTERNATIONAL CONFERENCE ON BIOINFORMATICS OF GENOME REGULATION AND STRUCTURE\SYSTEMS BIOLOGY GENETIC CONTROL OF CIRCADIAN RHYTHMS: AN IMPACT OF MOLECULAR CLOCK EXPRESSION PROFILE CHANGES IN LONGEVITY I.A. Solovev 1, 2 *, E.V. Dobrovolskaya 1 , A.A. Moskalev 1, 2, 3 1 Institute of Biology of Komi Scientifice Center of Ural Branch of RAS, Syktyvkar 2 Syktyvkar State University, Syktyvkar 3 Moscow Institute of Physics and Technology (State University), Russia * Corresponding author: soloviev@ib.komisc.ru Key words: circadian rhythms, aging, longevity, transcriptome Motivation and Aim: Genes of circadian rhythms change their expression during aging of different organisms. We analyzed available transcriptomic data from different on- line bases and compared circadian genes’ expression profile changes in animals. These findings have led us to an idea of normalizing expression profiles of circadian oscillator elements to compensate potential aging-associated changes during all lifespan on Dro- sophila model. The aim of the present research is to investigate the role of molecular oscillator elements (cry, per, tim, clk, cyc) in aging and longevity mechanisms [1]. Methods and Algorithms: We used standard methods of Drosophila cultivation, demo- graphic methods to investigate the lifespan changes, RU486-inducible UAS-GAL4 sys- tem inserted before genes of interest was used as a tool which up-regulates expression. Results: We overexpressed clk, per, cry, cyc and tim using neuron-specific RU486-in- ducible system, this resulted in the increase of median life expectancy (10%) in tim- and cry12-overexpessing females. Median lifespan of female fruit flies overexpressing per10 was 5.4% longer than in control group. Noteworthy, overexpression of clk shortened (-10%) only female’s lifespan. 4% augmentation of median life expectancy was ob- served for males overexpressing per24 and cyc. Conclusion: Thus, our data has shown that compensation of circadian clock genes’ po- tential age-dependent expression decrease (cry, per) in the nervous system during all imago’s life as well as hypercompensation of increased levels of other genes (tim, cyc) extends lifespan. The analysis of the literature shows that clock genes modulate the ac- tivity of various determinants of aging, which, probably, cause life extension [1]. Acknowledgements: The research is supported by RFBR grant N16-34-00734 and by Grant of Presidium of Ural Branch of RAS N15-4-4-23. References: 1. I. A. Solovyev, E. V. Dobrovolskaya, A. A. Moskalev (2016) Genetic control of circadian rhythms and aging, Russian Journal of Genetics, 52(4): 393-412. 291 THE TENTH INTERNATIONAL CONFERENCE ON BIOINFORMATICS OF GENOME REGULATION AND STRUCTURE\SYSTEMS BIOLOGY KYNURENIC ACID-SENSITIZED PHOTOLYSIS OF LENS PROTEINS UNDER ANAEROBIC CONDITIONS E.D. Sormacheva 1 *, P.S. Sherin 1, 2 , E.A. Zelentsova 1, 2 , T.G. Duzhak 1, 2 , Yu.P. Tsentalovich 1, 2 , R.Z. Sagdeev 1, 2 1 International Tomography Center SB RAS, Novosibirsk, Russia 2 Novosibirsk State University, Novosibirsk, Russia * Corresponding author: kate.sormacheva@gmail.com Key words: crystallins, kynurenic acid, UV-light, cataract A mammalian eye lens contains high concentrations of densely-packed proteins, called crystallins. They have no turnover during an individual lifespan and constantly accumu- late numerous post-translational modifications (PTMs). Eventually that can result in the loss of the crystallin solubility and the formation of aggregates scattering the incident light, i.e. the development of age-related cataracts. UV radiation is traditionally consid- ered as one of the factors for PTMs. The main chromophores of the human eye lens are kynurenine (KN) and its derivatives. These molecules effectively transfer the energy of absorbed light quanta into the heat, acting as UV filters preventing the eye tissue from photodamages. KNs can undergo thermal and photochemical degradation with the formation of products, some of which are more photochemically active than the parent molecules. One of these products is kynurenic acid (KNA), which exhibits the yield of the reactive triplet species of about 80%. The triplet KNA, T KNA, can react with proteins leading to their modifications. The goals of this work are: (1) to study the reactions of T KNA quenching by crystallins and (2) to analyze the crystallin modifications originat- ing from photo-induced reactions. The aqueous solutions of crystallins in the presence of KNA were subjected to steady- state and time-resolved laser flash photolyses; the analysis of modifications was carried out by gel electrophoresis and mass spectrometry. The crystallins quench T KNA via the electron transfer mechanism with the formation of radicals of the tryptophan and tyrosine residues. Reactions of T KNA with α- and β-crystallins results in the formation of tryptophan and tyrosine radicals, while in the case of γ-crystallin only tyrosine radicals were observed. The formation of large molecular weight aggregates is the major outcome of KNA-sensi- tized photolysis of crystallins under anaerobic conditions. Another modification observed for all crystallins is the formation of new absorption band with the maximum at 325 nm corresponding to products, which fluoresce in the near UV region. Mass spectrometric analysis has shown (i) monotonic degradation of crystallin monomers, (ii) degradation of tryptophan and tyrosine residuses, (iii) oxidation of methionine and tryptophan resi- duses and (iv) formation of an unknown modification -2 Da on the tryptophan residues. The obtained results clearly show that the photo-induced modifications of crystallins result in significant changes of these proteins that, in turn, can play an important role in cataractogenesis. Acknowledgements. Authors are grateful for the financial support Russian Foundation for Basic Research (project #16-33-00669). 292 THE TENTH INTERNATIONAL CONFERENCE ON BIOINFORMATICS OF GENOME REGULATION AND STRUCTURE\SYSTEMS BIOLOGY PARAMETER FITTING INFRASTRUCTURE FOR RULE- BASED MODELLING O.S. Sorokina 1 , A.A. Sorokin 2, 3 * 1 Edinburgh University, Edinburgh, UK 2 Institute of Cell Biophysics RAS, Pushchino, Russia 3 Moscow Institute of Physics and Technology, Dolgoprudny, Russia * Corresponding author: ivanov@bionet.nsc.ru Key words: systems biology, rule-based modelling, parameter estimation Motivation and Aim: Rule-based modelling is a new and highly dynamic area of re- search in systems biology. Model in rule-based systems, such as Kappa language [1] or BNGL [2] provide the compact and compositional description of complex biochemical and signalling networks. The majour obstacle in adoption of this technology is the rela- tive scarcity of tool support because the area is quite young. Recently we have devel- oped RKappa -- parameter exploration and global sensitivity analysis framework for the Kappa language. Here we are presenting the RKappa-based model fitting infrastructure. Methods and Algorithms: We have used RKappa as a simulation infrastructure and Nelder-Mead, genetic and particle-swarm algorithms to minimize the difference be- tween simulation results and experimental data. Taking into account the stochastic na- ture of simulation results each parameter set was simulated several times to get correct estimation of the model behaviour. Results: The fitting procedure described as a KFitProject object in R language. It re- quires several groups of objects, such as the model definition, the parameter space de- scription and the in silico experiment description. All parts of the project are converted into form suitable for simulation in general-purpose computing claster. The performance of infrastructure is demonstrated with simple ring-closure model and the model of bacte- rial transcription initiation. Conclusion: We have developed infrastructure for parameter fitting for rule-based mod- els. Availability: source code is available from GitHub: http://github.com/lptolik/RKappaFit Acknowledgements This work was supported by RFBR grant r_centr_a 14-44-03679. This work has made use of the resources provided by the Edinburgh Compute and Data Facility (ECDF) (http://www.ecdf.ed.ac.uk/) References: 1. V. Danos, et al. (2008) Rule-based modelling, symmetries, refinements. Form. Methods Syst. Biol., 5054, 103–122. 2. J. R. Faeder, et al (2009) Rule-Based Modeling of Biochemical Systems with BioNetGen. Methods Mol. Biol., 500, 113–167. 3. A. Sorokin, et al. (2015) RKappa: Statistical sampling suite for Kappa models, In: Hybrid Systems Biol- ogy, O. Maler, et al (Eds.), 128–142 (Springer). 293 THE TENTH INTERNATIONAL CONFERENCE ON BIOINFORMATICS OF GENOME REGULATION AND STRUCTURE\SYSTEMS BIOLOGY VIROME ANALYSIS FOR IDENTIFICATION OF VIRUSES IN BAT SPECIES FROM MOSCOW REGION A.S. Speranskaya 1 , E.V. Pimkina 1 , I.V. Artyushin 2 , M.V. Safonova 1 , A.A. Deviatkin 1 , K.V. Kuleshov 1 , V.G. Dedkov 1 , G.A. Shipulin 1 1 Central Research Institute for Epidemiology, Russian Inspectorate for Protection of Consumer Right and Human Welfare, Moscow, Russia 2 Biological Faculty, Moscow State University, Moscow, Russia Key words: virome, sequencing, bat The majority of infectious diseases that were discovered during the last few decades are actually zooantroponosis. Bats are widely distributed in the world and recognized res- ervoirs of many emerging human infection viruses. Analysis of the virome of bats that are distributed in different geographical regions is an actual approach for identifying the new species of viruses that are potentially cause human infection disease. In addition, periodic monitoring of bats populations may provide important information for zoo- antroponosis control. Numerous studies have described viruses in different bat species from countries of Europe, Asia, Africa but no Russia. We characterized the fecal virome of 29 wild bats. Fecal samples were collected during 2015 in Moscow Region (Zvenigorod Biological Station, ZBS) from six species: Myotis dasycneme, Myotis daubentonii, Myotis brandtii, Nyctalus noctula, Pippistrellus nathu- sii, Plecotus auritus. Ectoparasite analysis of animals resulted in mites (24 samples) or mites and fleas (2 samples). The eight bats were healthy and the three animals were not examinated. We used PCR assay targeted on Astroviridae, Coronaviridae, Herpesvirus, Lyssavirus I, Lyssavirus II, Caliciviridae (nairovirus), Filoviridae, arenavirus, rotavi- rus, paramyxovirus. High throughput sequencing analysis was performed using Illumina MiSeq. Data analysis was conducted as described in study Dedkov et al., 2016. The results revealed that 13 of 29 analyzed bats (45%) contained coronaviruses. After the SARS epidemic (a few years ago) some studies enabled hypotheses of bats as reser- voir hosts of coronaviruses. It was demonstrated that 6 of the 15 recognized coronavirus species were only found in bats. In this work, we found that five of six investigated bat species are hosts of different strains similar to known coronaviruses (including porcine epidemic diarrhea virus). The only P. auritu (single sample) was free from coronavi- ruses. Our results demonstrated that ZBS populations of bats are abundant reservoir of coronaviruses. We also confirmed other viruses that had previously been reported in different bat spe- cies from other regions: astroviruses were found in M. dasycneme and M. dasycneme. The members of herpesvirus and cypovirus genera were detected in P. nathusii and M. brandtii respectively. The twelve animals were healfy. Our result revealed the partial genome sequences of two new novel mammalian viruses. The few sequence reads of virome from M. daubentonii showed similarities to Ippy mammarenavirus (51% protein identity). Another new virus demonstrated ~71-78% pro- tein identity to rhabdovirus. Our work provides the first report about the bat viromes in Russia. It should help under- standing of the viruses communities present in bat species found near human habitats. 294 THE TENTH INTERNATIONAL CONFERENCE ON BIOINFORMATICS OF GENOME REGULATION AND STRUCTURE\SYSTEMS BIOLOGY EXPGENE – SOFTWARE FOR ANALYSIS AND PROCESSING OF GENE EXPRESSION DATA A.M. Spitsina Novosibirsk State University, Novosibirsk, Russia * Corresponding author: aspitsina@bionet.nsc.ru Download 3.91 Kb. Do'stlaringiz bilan baham: |
Ma'lumotlar bazasi mualliflik huquqi bilan himoyalangan ©fayllar.org 2024
ma'muriyatiga murojaat qiling
ma'muriyatiga murojaat qiling