International conference on bioinformatics of genome regulation
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Key words: Chironomidae, stress exposure, heat shock proteins Motivation and Aim: Chironomidae are considered to be among the most accommodated to abiotic stresses species of insects. Detailed understanding of underlying mechanisms of their tolerance or resistance to extreme conditions remains the hotspot of evolution- ary molecular study of arthropods. In this research we compared genomics and tran- scriptomics properties of six chironomids midges from different extreme ecosystems to reveal a background of their extraordinary resistance to abiotic stresses. Methods and Algorithms: We have used previously published genomes of three chirono- mids species as well as three newly sequenced and annotated genomes and transcrip- tomes. Since de-novo genome assembly of eukaryotic species presents significant chal- lenges (even despite relatively small genome size of chironomids), in many cases it was easier to perform general transcriptome analysis according to Trinity-associated protocol with Transdecoder, Trinotate and bowtie-RSEM-edgeR for differential expression. Results and Conclusion: Detailed analysis of expansion/contraction of functional groups of stress-responsible genes showed that high ability to withstand stress is not always necessary linked to changes in number of such genes. Different behavior of orthologous genes or transcripts upon stress exposure makes it reasonable to conjecture that often accommodation to abiotic stress goes on the way of regulation, as it was shown for such conservative group of stress-inducible agents as heat shock proteins. Acknowledgements: The work is performed according to the Russian Government Pro- gram of Competitive Growth of Kazan Federal University. 153 THE TENTH INTERNATIONAL CONFERENCE ON BIOINFORMATICS OF GENOME REGULATION AND STRUCTURE\SYSTEMS BIOLOGY COMPARATIVE TRANSCRIPTOMICS PROVIDES NEW INSIGHTS INTO ORIGIN OF EXTRAORDINARY RESISTANCE TO DESICCATION IN AUSTRALIAN MIDGE PARABORNIELLA TONNOIRI (CHIRONOMIDAE) O.S. Kozlova 1 *, E.I. Shagimardanova 1 , L.Kh. Shigapova 1 , R.M. Devyatiarov 1 , M.D. Logacheva 2, 1 , R. Cornette 3 , T. Kikawada 3 , O.A. Gusev 4, 1 1 Extreme Biology Laboratory, Institute of Fundamental Medicine and Biology, Kazan Federal University, Kazan, Russia 2 Laboratory of evolutionary genomics, Faculty of bioengineering and bioinformatics, Moscow State Uni- versity, Moscow, Russia 3 National Institute of Agrobiological Sciences, Tsukuba, Japan 4 Preventive Medicine & Diagnosis Innovation Program (PMI), Division of Genomic Technologies, RIKEN, Yokohama, Japan * Corresponding author: olga-sphinx@yandex.ru Key words: desiccation, transcriptome analysis, Chironomidae, Paraborniella tonnoiri Motivation and Aim Many Chironomidae species are known for their ability to successfully combat abiotic stresses using wide range of behavioral, morphological and biochemical features. Larvae of Australian midge Paraborniella tonnoiri presents example of evolving mechanism of extraordinary resistance to water loss. Remarkably, morphological, physiological and behavior patterns here are different from those used by truly anhydrobiotic African chi- ronomid Polypedilum vandrerplanki. The aim of our study was to reveal new molecular mechanisms, which help the given species to retain necessary amount of water inside its body and thus resist partial desiccation in laboratory conditions, as well as in nature. Methods and Algorithms: Since P. tonnoiri remains previously unsequenced and does not have its genome assembled and annotated, we performed high throughput mRNA sequencing using control, desiccated and heat shocked (to estimate general response to heat) groups of larvae to get the pool of 13 libraries with paired-end Illumina reads. These libraries were used for de-novo draft transcriptome assembly using Trinity, after that ORF prediction and functional annotation were carried out according to Trinity- associated approach with Transdecoder and Trinotate. Results and Conclusion: Among general pool of transcripts, more than 2 000 showed themselves as differentially expressed in response to desiccation and/or heat shock with at least 2-fold change in expression (FDR≤0.01). The most interesting cluster of tran- scripts stands for specific response to desiccation. Comparing the data with those of truly anhydrobiotic chironomids suggest that genetic mechanism of ability to resist severe desiccation in P. tonnoiri evolved in completely independent from truly anhydrobiosis evolutionary way. Acknowledgements: The work is performed according to the Russian Government Pro- gram of Competitive Growth of Kazan Federal University. 154 THE TENTH INTERNATIONAL CONFERENCE ON BIOINFORMATICS OF GENOME REGULATION AND STRUCTURE\SYSTEMS BIOLOGY TRAJECTORIES OF THE DNA KINKS IN THE SEQUENCES CONTAINING CDS REGIONS L.A. Krasnobaeva 1, 2 *, L.V. Yakushevich 3 1 Tomsk State University, Tomsk, Russia 2 Siberian State Medical University, Tomsk, Russia 3 Institute of Cell Biophysics RAS, Pushchino, Moscow region, Russia * Corresponding author: kla1983@mail.ru Key words: DNA dynamics, kink trajectories, gene energy profile, CDS regions, interferon alpha 17 Motivation and Aim: In our previous works [1-2] to model the DNA kinks, we used a simple model based on the sine-Gordon equation with parameters that were averaged over all length of the gene sequence. However, this approach does not allow us to take into account the effect of the internal structure of the DNA sequence, and, in particular, the presence of the CDS regions, on the DNA kinks dynamics. In this paper, we just con- sider this problem and solve it for the gene encoding interferon alpha 17, the sequence of which consists of three regions: the coding (CDS) region (50..619) and the two regions (1..49 and 620..980) with unknown functional significance. Methods and Algorithms: To solve the problem, we use several methods: the method of McLaughlin and Scott, the average field approximation and the block method where the parameters of the model equation are averaged separately for each of the three regions. To analyze the DNA kinks dynamics, we use the physical approach which includes the calculation of the energy profile of the sequence and the construction of the trajectory of the movement of the DNA kink in the potential with this profile. Results: We have obtained the energy profile of the sequence of the gene coding interfer- on-alpha 17. It was shown that the CDS region corresponds to the region of the energy barrier. The minimum value of the kink initial velocity required to overcome the barrier was estimated. The trajectories with different initial kink velocities were constructed. The trajectories were calculated both with and without dissipative effects. It was shown that with the increasing of the initial kink velocity the trajectories became more inde- pendent on the inhomogeneity of the sequence. We suggest that the proposed approach can be applied to analyze the movement of transcription bubbles through the CDS re- gions of the DNA sequences. References: 1. L.A. Krasnobaeva, L.V. Yakushevich (2015) Rotational dynamics of bases in the gene coding inter- feron alpha 17 (IFNA17), Journal of Bioinformatics and Computational Biology, 13: №1, 1540002 (13 pages). 2. L.V. Yakushevich, L.A. Krasnobaeva (2016) Forced oscillations of DNA bases, Biophysics, 61: № 2, 286-296. 155 THE TENTH INTERNATIONAL CONFERENCE ON BIOINFORMATICS OF GENOME REGULATION AND STRUCTURE\SYSTEMS BIOLOGY INMETHYL: A TOOL FOR DESIGN OF SPECIFIC PRIMERS FOR METHYLATION PROFILING OF COMPLETE CPG ISLANDS G.S. Krasnov*, A.V. Kudryavtseva, N.V. Melnikova, A.A. Dmitriev Engelhardt Institute of Molecular Biology RAS, Moscow, Russia * Corresponding author: gskrasnov@mail.ru Key words: DNA methylation, CpG island, primer design, bisulfite conversion Motivation and Aim: The non-specificity of PCR amplification after bisulfite conversion is one of the most common issues in gene methylation studies. In fact, bisulfite treatment leads to the reduction of 4-letter alphabet (ATGC) to 3-letter (ATG, except methylated cytosines) that dramatically increases a possibility of mispriming. The second issue of the promoter region studies is coming from the features of CpG islands sequence: low- complexity, polyN-rich, and CG-rich. Methods and Algorithms: InMethyl is a Python-based application. It uses bowtie high- throughput aligner to identify potential mispriming sites and undesirable PCR products in the bisulfite treated or intact genome. Primer selection is based on calculating scoring factor that takes into account primer pair specificity, nucleotide composition (sequence complexity), thermodynamic features (melting temperature, dimers dG, etc.), presence of CpG sites and other parameters. Users are intended to customize desired or limit ranges of these values as well as penalties for out-of-bounds values. Results: We developed the InMethyl software, a novel application enabling the design of target-specific primers for amplification of CpG islands and other hard-to-study genomic regions. A key feature of the tool is the balance between various characteristics that al- lows to pick up primers in the arduous genomic regions. Moreover, InMethyl software allows users to optimize combination of PCR primer pairs to perform the amplification of large genomic regions, e.g. CpG islands. Conclusion: InMethyl is a novel powerful tool for the design of specific primers for DNA methylation profiling even of complete CpG islands. Availability: InMethyl software is freely available at https://sourceforge.net/projects/in- methyl/. Acknowledgements: This work was financially supported by the Russian Foundation for Basic Research (grants 15-04-08731 and 15-34-70055 mol_a_mos) and RAS Presidium Program “Molecular and Cellular Biology” (grant for AAD). 156 THE TENTH INTERNATIONAL CONFERENCE ON BIOINFORMATICS OF GENOME REGULATION AND STRUCTURE\SYSTEMS BIOLOGY RTRANS: ANALYSIS OF RNA-SEQ DIFFERENTIAL EXPRESSION USING GLM APPROACH AND UNCOVERING ITS BIOLOGICAL BACKGROUND G.S. Krasnov*, A.V. Snezhkina, N.V. Melnikova, A.A. Dmitriev, A.V. Kudryavtseva Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, Russia * Corresponding author: gskrasnov@mail.ru Key words: transcriptomic data, RNA-Seq analysis, RTrans, Bioconductor Motivation and Aim: RNA-Seq analysis is one of the most informative approaches for the discovering alterations in cell mechanisms standing behind adaptation, differentia- tion, development, response to stress and other essential biological processes. The analy- sis of transcriptomic data quite often is a problem since it is labor intensive and needs high qualification of a specialist. Methods, algorithms, results: We present RTrans, an R script aimed at comprehensive analysis of RNA-Seq data, from identification of differentially expressed genes (includ- ing GLM multivariate testing), creating PCA plots and heatmaps to the gene set enrich- ment analysis (GSEA) based on Gene Ontology and KEGG databases as well as visual- ization of alterations in KEGG pathways (e.g. MAPK, PI3K/mTOR, p53, etc.). RTrans uses read-counts-per-gene files, which are generated with HT-Seq, featureCount tools or PPLine, our previously developed automated pipeline for the analysis of transcriptome or exome sequencing data. RTrans is based on several Bioconductor packages: edgeR, topGO, clusterProfiler and pathview. Conclusion: Thus, RTrans is flexible R tool that provide a way to analyze RNA-Seq data and understand its biological background by cost of spending only several minutes to create sample description sheet and select conditions or GLM models to test. Availability: RTrans is freely available at https://sourceforge.net/projects/rtrans/ Acknowledgements: This work was financially supported by the Russian Foundation for Basic Research (grants 15-04-08731, 16-16-00114 and 15-34-70055) and RAS Presidi- um Program “Molecular and Cellular Biology”. 157 THE TENTH INTERNATIONAL CONFERENCE ON BIOINFORMATICS OF GENOME REGULATION AND STRUCTURE\SYSTEMS BIOLOGY DIFFERENTIAL EXPRESSION OF ALTERNATIVELY SPLICED TRANSCRIPTS RELATED TO ENERGY METABOLISM IN COLORECTAL CANCER G.S. Krasnov 1 , A.V. Snezhkina 1 , I.Y. Karpova 1 , O.L. Kardymon 1 *, M.S. Fedorova 1 , A.A. Moskalev 1 , A.F. Sadritdinova 1, 2 , K.M. Nyushko 2 , N.V. Melnikova 1 , D.V. Kalinin 3 , A.A. Belova 1, 2 , M.A. Chernichenko 2 , K.M. Klimina 4 , D.V. Sidorov 2 , A.Y. Popov 2 , A.A. Dmitriev 1 , A.V. Kudryavtseva 1, 2 1 Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow, Russia 2 Herzen Moscow Cancer Research Institute, Ministry of Health of the Russian Federation, Moscow, Russia 3 A.V. Vishnevsky Institute of Surgery, Moscow, Russia 4 Vavilov Institute of General Genetics, Russian Academy of Sciences Moscow, Russia * Corresponding author: rhizamoeba@mail.ru Key words: alternative splicing, energy metabolism, tumor-specific mRNA isoforms, colorectal cancer, adenocarcinoma Colorectal cancer (CRC) is one of the most common malignant tumors worldwide. CRC has several susceptibility factors such as hereditary, smoking, diet, microbiota, and chronic inflammation. CRC molecular pathogenesis is heterogeneous and may be followed by mutations in oncogenes and tumor suppressor genes, chromosomal and mi- crosatellite instability, hypermethylation of CpG islands, oxidative stress, impairment of different signaling pathways, and energy metabolism alterations. In the present study, we used CrossHub software to evaluate the expression of alternatively spliced transcripts related to energy metabolism in CRC. Using the analysis of The Cancer Genome Atlas (TCGA) RNA-Seq datasets derived from colorectal cancer and adjacent normal tissue we examined the expression of 1014 alternative mRNA isoforms involved in cell en- ergy metabolism. We revealed 11 genes with differentially expressed alternative tran- scripts whereas overall gene expression was not significantly altered in CRC. A set of 15 differentially expressed mRNA isoforms of interest has been validated by qPCR. Thirteen mRNA isoforms were overexpressed in colorectal tumors (OGDH: uc011k- by.1 and uc011kbz.1; COL6A3: uc002vwo.2; ICAM1: uc010xle.1; PHPT1: uc004cjq.3; PPP2R5D: uc010jyd.2; HKDC1: uc001jpf.3 and uc009xqb.2; SLC29A1: uc003owz.1; MYBBP1A: uc002fxz.3; SRI: uc003ujq.1; TRIB3: uc002wdm.2 and uc002wdn.2) which is in concordance with the bioinformatics data. Three genes revealed negative cor- relation between the expression level of their alternative mRNA isoforms (MYBBP1A: uc002fxz.3 and uc002fyb.3; SRI: uc003ujq.1 and uc003ujr.1; TRIB3: uc002wdm.2 and uc002wdn.2). Six of thirteen isoforms were also strongly overexpressed in breast, lung, prostate and kidney tumors. Thus, these alternative mRNA isoforms could be involved in the development of cancers through altered energy metabolism. Our results suggest a set of six tumor-specific mRNA isoforms that may be used for cancer diagnosis methods development. 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). 158 THE TENTH INTERNATIONAL CONFERENCE ON BIOINFORMATICS OF GENOME REGULATION AND STRUCTURE\SYSTEMS BIOLOGY FAIRDOM: DATA AND MODEL MANAGEMENT FOR SYSTEMS BIOLOGY PROJECTS O. Krebs 1 *, R. Kuzyakiv 5 , M. Golebiewski 1 , S. Owen 2 , Q. Nguyen 1 , N. Stanford 2 , K. Wolstencroft 4 , J.L. Snoep 2, 3 , B. Rinn 5 , W. Mueller 1 , C. Goble 2 1 Heidelberg Institute for Theoretical Studies, Germany 2 School of Computer Science, University of Manchester, UK 3 Department of Biochemistry, University of Stellenbosch, South Africa 4 Leiden Institute of Advanced Computer Science, Leiden University, NL 5 ETH Zurich, Swiss * Corresponding author:olga.krebs@h-its.org Key words: Data management, Databases, SEEK, FAIRDOM, Data integration Motivation and Aim: Systems Biologists need a data management infrastructure that en- ables collaborating researchers to share and exchange information and data as and when it is produced, throughout the entire iterative cycle of experimentation and modelling. Method: We develop and offer integrated data management support for systems biol- ogy research within and across research consortia comprising a whole package of solu- tions. This is applied to large-scale research initiatives in which we are responsible for the scientific data management, like the German Virtual Liver Network (http://www. virtual-liver.de/) and European research networks like ERASysAPP (ERA-Net for Sys- tems Biology Applications), SysMO (Systems Biology of Microorganisms) or NMTrypI (New Medicines for Trypanosomatidic Infections), and Synthetic Biology Centres at Manchester (SynBioChem) and Edinburgh (SynthSys). Results: Our data management concept consists of 4 major pillars: 1) Infrastructure backbone: The SEEK platform as registry and a commons for data, models, processes and resulting publications and presentations, at the same time yellow pages for projects, people and events 2) Terminology: Tailored use of controlled vocabularies and ontologies to describe the data 3) Modelling support: Seamless handling and simulation of models by integrated modelling platforms (JWS-Online, SYCAMORE, Cytoscape) 4) Social support: Data management advocates within the projects for gathering requirements and dissemination The data management concept that we have developed is not only applied in the research consortia that we are responsible for, but also used by other systems biology projects. Conclusion: Unlike the majority of data management systems, we specifically support the interaction between modelling and experimentation. Datasets can be associated with models and/or workflows, and model simulations can be compared with experimental data. 159 THE TENTH INTERNATIONAL CONFERENCE ON BIOINFORMATICS OF GENOME REGULATION AND STRUCTURE\SYSTEMS BIOLOGY THE MITOCHONDRIA-TARGETED PLASTOQUINONE SKQ1 AFFECTS DROSOPHILA MELANOGASTER LIFESPAN IN VARIOUS ENVIRONMENTS A.V. Krementsova 1 *, N.V. Roshina 2 , E.A. Tsybul’ko 2 , O.Y. Rybina 2 , A.V. Symonenko 2 , E.G. Pasyukova 2 1 Emmanuel Institute of Biochemical Physics RAS, Moscow, Russia 2 Institute of Molecular Genetics RAS, Moscow, Russia * Corresponding author: krementsova@sky.chph.ras.ru Key words: Antioxidant, Life span, Drosophila It was previously shown that mitochondria-targeted plastoquinone derivative SkQ1 (10-(6′-plastoquinonyl) decyltriphenylphosphonium) in extremely low nanomolar con- centrations is able to prolong Drosophila melanogaster w 1118 line male and female mean lifespan by about 10% [1]. To examine again if the effect of SkQ1 depends on the base- line life span and to determine whether SkQ1 affects life span of other, genetically un- related lines of flies, three wild type lines, R340 (extremely low life span), Canton S (medium lifespan) and Oregon RC (high lifespan), which have no genetic similarity to the w 1118 line. A significant increase in female and male survival was observed in experiments with lines R340 and Canton S, the effect of about 10% was similar to that observed previously for the w 1118 line, but no significant increase in female and male survival was observed in experiments with the Oregon RC line. We also assessed the effectiveness of SkQ1 treatment when severely changing environ- mental factors: temperature (18ºC and 8ºC), day and night darkened and diet (starvation, 12.5% and 25% of regular food supply) [2]. The action of these factors leads to a slower metabolism and thus to a reduction in generation of reactive oxygen species (ROS) in the cell and to increase longevity. It has been shown that the combined effect of several factors did not lead to a synergistic effect. Adding to the feed flies antioxidant SkQ1 not only led to a further increase in life expectancy of flies, but in some cases led to its reduction. Antioxidant SkQ1 proved to be quite effective (20%) with some deterioration of environmental conditions, but showed its low efficiency in extremely harsh stress conditions. SkQ1 positively affected life span of individuals with different wild type genotypes liv- ing in a variety of environments; it demonstrated properties of a promising life-prolong- ing drug unsusceptible to fluctuations in the mean lifespan of recipients, methods of preparation and administration of the drug, seasons, or calendar years. References 1. Krementsova AV, Roshina NV, Tsybul’ko EA, Rybina OY, Symonenko AV, Pasyukova EG: Reproduc- ible effects of the mitochondria-targeted plastoquinone derivative SkQ1 on Drosophila melanogaster lifespan under different experimental scenarios. (2012) Biogerontology, 13(6):595-607. 2. Tsybul’ko EA Krementsova A, Symonenko AV, Rybina OY, Roshina NV, Pasyukova EG (2016) The mitochondria-targeted plastoquinone derivative SkQ1 promotes health and increases Drosophila mela- nogaster longevity in various environments. J Gerontol A Biol Sci Med Sci in press. 160 THE TENTH INTERNATIONAL CONFERENCE ON BIOINFORMATICS OF GENOME REGULATION AND STRUCTURE\SYSTEMS BIOLOGY REGULATION OF BASE EXCISION REPAIR – CANONICAL AND NON-CANONICAL PROCESSING OF GENOMIC URACIL H.E. Krokan*, H.S. Pettersen, R. Mjelle, S.A. Hegre, P. Sætrom, F. Drabløs, A. Sarno, A. Galashevskaya, P.A. Aas, N.B. Liabakk, B. Doseth, G. Slupphaug, B. Kavli Norwegian University of Science and Technology, Trondheim, Norway * Corresponding author: hans.krokan@ntnu.no Download 3.91 Kb. Do'stlaringiz bilan baham: |
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