International conference on bioinformatics of genome regulation
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Key words: microsatellite, wild animal, criminal identification , illegal hunting Motivation and Aim: Illegal removal of animals from their natural habitat represents a worldwide problem. In addition to negative economic impacts, illegal hunting can be detrimental to the environment because it can lead to uncontrollable changes in bio- logical communities or reduce the population of protected species (e.g., European bison, Bison bonasus). In the Republic of Belarus, moose (Alces alces), wild boar (Sus scrofa), roe deer (Capreolus capreolus), and red deer (Cervus elaphus) are the main species subject to hunting. All these species belong to even-toed ungulates (order Artiodactyla) and are therefore closely related to each other as well as to domesticated animals such as the cow, sheep, goat, and pig. Investigation of illegal hunting activities may require the DNA-identification of either the species or the specific animal since biological speci- mens (e.g., blood) are morphologically indistinguishable. Methods and Algorithms: We performed multiplex PCR of STR loci using fluorescently labeled primers. PCR products were analyzed with capillary electrophoresis using auto- mated sequencers manufactured by Applied Biosystems. Results: The phenomenon of targeted cross-species microsatellite amplification within the order Artiodactyla was investigated by using primers designed for STR loci of one species (original species) for genotyping of genetically related species (target species). We obtained non-amplifiable, monomorphic loci (i.e., loci with a single allele in all members of a species or family) as well as polymorphic loci (i.e., loci that have more than one allelic variant) and investigated the differences in molecular size of PCR prod- ucts of different species. We propose the BM1824 locus of the cattle [1] as the key ele- ment of the test system for species identification. This locus produced monomorphic PCR products of 139 b.p. for the moose, red deer, roe deer and fallow deer (identifica- tion of the family Cervidae); PCR products exceeding 169 b.p. for the cattle, European bison, goat, and sheep (identification of the family Bovidae); and no PCR products not only for the human, horse, domestic cat, and dog but also for wild boar/pig (identifica- tion of the suborders Ruminantia/Suiformes). A multiplex test system was developed that combines primers for STR-loci of the cattle, deer, reindeer, goat, sheep, and pig. This system allows, via the analysis of PCR products, to determine complex patterns specific for various species of the order Artiodactyla, which are necessary for identification of species and other taxa. Conclusion: The identification of biological specimens of wild animals without defined morphological, anatomical, and physiological attributes can be conducted by DNA anal- ysis based on cross-amplification. Availability: Forensic DNA analysis laboratories, determination of authenticity of meat products. References: 1. Genbank: G18394; UniSTS ID: 44288 324 THE TENTH INTERNATIONAL CONFERENCE ON BIOINFORMATICS OF GENOME REGULATION AND STRUCTURE\SYSTEMS BIOLOGY MOLECULAR EVOLUTION OF YUCCA PROTEIN FAMILY I.I. Turnaev*, V.V. Suslov, K.V. Gunbin, D.A. Afonnikov Institute of Cytology and Genetics SB RAS, Novosibirsk, Russia *-Corresponding author: turn@bionet.nsc.ru Key words: Yucca proteins, Flavin monooxygenases, molecular evolution Motivation and Aim: The aim of our study was to determine the origin and evolution YUCCA protein family. Methods and Algorithms: The homologous sequences of Arabidopsis thaliana YUCCA proteins were identified using BLASTP and DELTA-BLAST tools at NCBI. Protein se- quence alignment reconstructed by Promals. Protein 3D structures were reconstructed by I-TASSER 4.4 web-service. After that, various protein structure refinement tools were used (FG-MD, ModRefiner, i3Drefine, GalaxyRefine). The identification of pro- tein domain boarders was based on 3D protein structures; for this purpose, we used ThreaDom system. Results and Conclusion: Analysis on the phylogenetic tree of plant and non-plant YUC- CA homologs identified three groups of proteins which are differ by patterns of function- al sites, conserve domains, and whole 3D structure: i) FMO proteins (including YUCCA proteins), almost all of them contain in site FMO motif FxGxxxHxxxY/F, 3 structural domains (SD), and short highly hydrophobic inner loop in central domain tightly cov- ering active center; ii) Baeyer–Villiger monooxygenases, which all contain FxGxxx- HxxxW motif, 3 SD, and long flexible highly hydrophilic inner loop in central domain locating near active center; iii) a group of proteins characterized by predominance of FxGxxxHxxxH motif and 4 SD. FMO motives i and ii is already recorded in [1], FMO motif is not identified in the literature. Our results suggest that these three groups of proteins have different enzymatic functions. Therefore FMO motif ii and iii groups of sequences could be considered as unrelated to FMO/YUCCA superfamily and should be excluded from further analysis. We identified that closest homologs to YUCCA proteins are YUC-like proteins of soil bacteria and cyanobacterial proteins. Analysis of 3D structures of YUCCA proteins (YUCCA1, 2, 4-6, 10 A. thaliana) revealed three regions: N-terminal (1-141 aa by YUC- CA10 by A. thaliana), central (142-311 aa) and C-terminal (312-383 aa). YUCCA pro- teins form a two-subunit structure: the first subunit composed of central region, and the second composed of the combination between N- and C-terminal regions. Phylogenetic analysis sequences of these three regions showed that the topology of their phylogenetic trees differ. The phylogenetic tree topology of the central YUCCA region match with standard species phylogeny of plants (in contrast to the tree topology of whole protein). However, the tree topology of both N- terminal and C-terminal YUCCA regions are differ from the plant species phylogeny. Hence, that the difference between the phyloge- netic tree topologies of 3 regions of YUCCA proteins could be due to either the differ- ences in evolutionary regimes, or the presence of horizontal transfer of DNA fragments which correspond to the regions. Acknowledgements Protein 3D structure reconstruction by I-Tasser performed by KVG. The work supported by budget project № 0324-2015-0003. References: 1. A. Riebel, et. al.. (2013), J Mol Catal B Enzym, 88: 20-25. 325 THE TENTH INTERNATIONAL CONFERENCE ON BIOINFORMATICS OF GENOME REGULATION AND STRUCTURE\SYSTEMS BIOLOGY LOOKING FOR PROTEOMIC MARKERS OF BREAST CANCER IN BLOOD EXOSOMES O.S. Tutanov 1 , S.N. Tamkovich 1 *, Y.S. Bakakina 2 , L.V. Dubovskaya 2 , Y.P. Tsentalovich 3 , I.D. Volotovskiy 2 , P.P. Laktionov 1 1 Institute of Chemical Biology and Fundamental Medicine SB RAS, Novosibirsk, Russia 2 Institute of biophysics and cellular engineers NASB, Minsk, Byelorussia 3 Institute “International Tomografic Center” SB RAS, Novosibirsk, Russia * Corresponding author: s.tamk@niboch.nsc.ru Key words: proteomics, exosomes, blood, breast cancer Motivation and Aim: It is known that the body cells secrete exosomes into the extracel- lular space, including into biological fluids, such as blood. In contrast to tumor specific proteins circulating in blood in a very low concentration exosomes of tumor origin are readily isolated providing enrichment of tumor proteins and improve efficacy of their detection. Thus, exosome based tumor-specific protein assay represent a valuable tool for non-invasive diagnosis of malignant neoplasms. Methods and Algorithms: Exosomes from blood plasma and cell-surface-bound exo- somes are obtained as described [1] from blood of healthy females (n=5) and primary breast cancer patients (n=5, T1-2N0M0). Size distribution and concentration of the mic- roparticles was estimated by nanoparticle tracking analysis (NTA) using NanoSight NS- 300 (Malvern, USA); anti CD-63, CD-24, CD-9, CD-81 antibodies (BD Biosciences, USA) were used for characterization of exosomes by flow cytometry; protein concentra- tion was measured by NanoOrange Protein Quantitation kit (Molecular Probes, USA). Exosomal proteins were separated by 2D-SDS PAAGE and identified by MALDI-TOF mass-spectrometry. Results: NTA demonstrate presence of 65-175 nm membrane–wrapped particles in the preparations isolated from blood. The exposure of CD-63, CD-24, CD-9, CD-81 demon- strate isolation of mainly exosomes. Proteins ranged from 10 to 250 kDa were found in exosomes by 2D-SDS PAAGE and besides 8 regions of electrophoregram differ between healthy and cancer patients in expression level and number of proteins. MALDI-TOF with a score exceeding 56 reveals 186 proteins; 63 of which are found first time (accord- ing to the data on the basis of Exocarta March 2016). Conclusion: The data obtained demonstrate that exosomes carry a number of not yet described proteins and represent a potential source of tumor-specific proteins for detec- tion of breast tumors. Deep analysis of the data including expression level of discovered tumor related proteins is necessary for evaluation of their diagnostic value. Acknowledgements: The present work was supported by the integration project of the National Academy of Sciences of Belarus (grant #М15СО-025) and the SB RAS (head Tamkovich SN) “Analysis of circulating blood exosomes under normal conditions and in breast cancer”. References: 1. S. Tamkovich et al (2015) The method for isolation exosomes from blood. Russian patent # 2556825 from 18.06.2015. 326 THE TENTH INTERNATIONAL CONFERENCE ON BIOINFORMATICS OF GENOME REGULATION AND STRUCTURE\SYSTEMS BIOLOGY MITOCHONDRIAL DYSFUNCTION IN SPORADIC ALZHEIMER’S DISEASE-LIKE PATHOLOGY IN OXYS RATS M.A. Tyumentsev 1 *, E.V. Kiseleva 1 , V.A. Vavilin 2 , N.G. Kolosova 1 , N.A. Stefanova 1 1 Institute of Cytology and Genetics SB RAS, Novosibirsk, Russia 2 Institute of Molecular Biology and Biophysics SB RAMS, Novosibirsk, Russia * Corresponding author: landselur@bionet.nsc.ru Key words: Alzheimer’s disease, brain aging, senescence-accelerated OXYS rats Motivation and aim: Alzheimer’s disease (AD) is the most prevalent neurodegenerative disease resulting in brain tissue atrophy and dementia. Amyloid cascade hypothesis pos- its that central event in the AD pathogenesis is the accumulation of beta amyloid peptide. However, recent data indicate that Aβ hyperproduction might be a secondary event in the AD pathogenesis as most hallmarks of the disease predate it. Mitochondrial cascade hy- pothesis posits that mitochondrial dysfunction is the key factor coupling the vicious cycle of the AD pathogenesis. However, mechanisms launching this cascade remain cryptic and investigation is hampered by the lack of animal models faithfully reproducing hu- man disease. Senescence-accelerated OXYS rats constitute a model of sporadic AD de- veloping its main hallmarks: Aβ accumulation, tau hyperphosphorylation, neuronal loss, impaired learning and memory. Aim of our research is to study the role and nature of the mitochondrial dysfunction in the development of AD-like pathology in OXYS rats. Methods and algorithms: In order to determine pathways participating in the develop- ment of the mitochondrial dysfunction in OXYS rats, we used RNAseq data from rats’ hippocampi collected at the age of 18 months when the symptoms of the AD-like pathol- ogy are the most pronounced. With 93 differentially expressed genes (DEGs) belonging to the “mitochondrion” category of the DAVID database we have reconstructed gene net- work using GeneMANIA plugin. To establish the role of reactive oxygen species (ROS) in the pathogenesis of the AD-like pathology we measured ROS production by isolated brain mitochondria of 3 months old Wistar and OXYS rats. Age-related changes hippo- campal neurons’ mitochondrial network were studied using electron microscopy. Results: RNAseq analysis showed differences in the mRNA levels of 93 genes from the “mitochondrion” category of which 55 genes are upregulated and 38 downregulated. Ten most connected nodes of the gene network were taken for further evaluation. The nodes correspond to genes involved in the energy metabolism, lipid metabolism, Aβ detoxifica- tion, proteostasis, and mitochondrial translation. Nine of these genes are upregulated. Six genes are connected to enzymatic activity; four genes are subunits of protein complexes. It is worth noting that we have not found significant changes in the antioxidant signaling. Additionally, ROS production by the OXYS brain mitochondria do not differ significant- ly from that of Wistar rats. Electron microscopy showed that OXYS mitochondria unlike those from Wistar rats fail to increase their quantity with age with this trend accompanied by the shutdown of mitochondrial dynamics as evidenced by decreased number of inter- mitochondrial contacts. Conclusions: We have found that the AD-like pathology is characterized by changes in a diverse set of mitochondrial functions but not oxidative stress with condition’s onset marked by changes in mitochondrial content and dynamics in the hippocampal neurons. Acknowledgements: The work was supported by the RSF grant 16-15-10005. 327 THE TENTH INTERNATIONAL CONFERENCE ON BIOINFORMATICS OF GENOME REGULATION AND STRUCTURE\SYSTEMS BIOLOGY REGULATION OF RIPKS IN CELL SURVIVAL AND CELL DEATH BY APOPTOSIS AND NECROPTOSIS, INSIGHTS AND THERAPEUTIC POTENTIAL P. Vandenabeele 1, 2 1 VIB Inflammation Research Center, Technologiepark 927, Zwijnaarde-Ghent, 9052, Belgium 2 Department of Biomedical Molecular Biology, Ghent University, Technologiepark 927, Zwijnaarde-Ghent, 9052, Belgium Key words: cell death, necroptosis, gene networks, drugs Necroptosis was initially identified as a backup cell death program when apoptosis is blocked. However, it is now recognized as a cellular defense mechanism against infec- tions and is presumed to be a detrimental factor in several pathologies driven by cell death. Necroptosis is a prototypic form of regulated necrosis that depends on activation of the necrosome, a protein complex in which receptor interacting protein kinase (RIPK) 3 is ac- tivated which on its turn phosphorylates a plasma membrane destabilizing protein MLKL, resulting in cellular swelling and explosion. The RIP homotypic interaction motif (RHIM) is the core domain that regulates activation of the necrosome. To date, three RHIM-contain- ing proteins have been reported to modulate the kinase activity of RIPK3 within the necro- some: RIPK1, Toll/IL-1 receptor domain-containing adaptor inducing IFN-β (TRIF), and DNA-dependent activator of interferon regulatory factors (DAI). RIPK1 is a key molecule determining cellular fate downstream of several innate immune receptors. It is a serine/ threonine kinase consisting of an N-terminal kinase domain linked by a largely unstruc- tured intermediate domain to a C-terminal death domain. In the TNF signaling pathway, RIPK1 paradoxically promotes cell survival as well as cell death. These opposite cellular functions are mediated by 2 distinct faces of RIPK1. Upon binding of TNF to TNFR1, RIPK1 is recruited to the TNF receptor 1 complex I where it acts as a scaffold protein promoting cell survival, in part, by activating the canonical NF-kB and MAPK pathways, but also by IKK-dependent phosphorylation of RIPK1. Specific conditions (blocking IAPs, TAK1 or IKKs) changes RIPK1 from a survival scaffold to a deadly kinase, which then regulates assembly of 2 possible cytosolic cell death-inducing complexes, namely complex IIb (RIPK1-FADD-Caspase-8) leading to apoptosis and the necrosome (RIPK1-RIPK3- MLKL) leading to necroptosis, requiring in both cases RIPK1 kinase activity. The precise molecular mechanisms controlling RIPK1 survival and cell death functions are currently un- known. Similarly, how RIPK1 kinase activity exactly contributes to either of both cell death modalities is largely unknown. Despite this lack of understanding, it is evident that RIPK1 plays a dual role downstream of TNFR1 and that its kinase activity therefore needs tight repression to avoid unnecessary damage to the organism. This crucial role of RIPK1 is also illustrated in vivo by the observation that RIPK1 controls survival and cell death by apoptosis or necroptosis of many cell types such as epithelial cells of intestine, skin and lung, but also haematopoietic cells and liver cells. Targeting necroptosis can occur at three levels: blocking RIPK1 and RIPK3 kinase activity, and blocking MLKL. Novel drugs and known drugs have been identified in cellular pheno- typic screenings which block necroptosis. These drugs are effective in blocking inflamma- tory, degenerative and infectious diseases. On the other hand induction of necroptosis has been found effective in inducing immunogenic cell death. Altogether these data illustrate the crucial role of RIPKs in homeostasis and pathologies, and provide profound therapeutic perspectives for their targeting. 328 THE TENTH INTERNATIONAL CONFERENCE ON BIOINFORMATICS OF GENOME REGULATION AND STRUCTURE\SYSTEMS BIOLOGY MUTATIONS SPECTRA OF MAJOR ONCOGENES IN PATIENTS WITH MULTIPLE PRIMARY NEOPLASIA G.V. Vasiliev 1 *, A.V. Savkova 2 , A.V. Gerasimov 3 1 Institute of Cytology and Genetics SB RAS, Novosibirsk, Russia 2 Centre for postgraduate medical education, NGU, Novosibirsk, Russia 3 Novosibirsk regional clinical oncology hospital, Novosibirsk, Russia * Corresponding author: genn@bionet.nsc.ru Key words: sequencing, oncogenes, mutation spectra Motivation and Aim: The study of genetic predisposition to cancer has a high predictive value for early detection and proper treatment. The occurrence of multiple non-metastat- ic primary malignancy in one patient reveal a genetic predisposition to the development of cancer. Methods: A total of 8 patients of Novosibirsk regional clinical oncology hospital with multiple primary neoplasia were included in this study. Patient information, including sex, age, tumor type and family hystory were recorded. DNA was extracted from 5 ml of whole human blood. The next generation sequencing Ion AmpliSeq™ Cancer Hotspot Panel v2 for Ion Torrent PGM was used to investigate generative mutations spectrum in the samples from all patients. The panel used targeted 207 amplicons encompassing 2800 known cancer-relevant variants across 50 cancer-related genes. Each sample was individually barcoded, all 8 samples was pooled prior E-PCR, loaded on a 316v2 Chip and sequenced according to the Ion PGM 200 Sequencing protocol. The average depth of total coverage was >200, each nucleotide coverage was >50. Sequencing reads were analyzed using Torrent Suite software program with the ‘variant caller v4.0.2’ plugin and aligned to the human reference genome, hg19, which was uploaded on the Ion Reporter software v4.2 to perform variant calling and mapping. Results: For 8 patients a total of 94 polymorphic variants in 207 regions covering “muta- tion hotspots” in 50 tumor-related susceptibility genes where found. Number of muta- tions per patient vary from 9 to 17 homo- or heterozygous SNP. Among the 50 genes included in panel, 17 genes were found mutated. All 8 patients had variations in FGFR3 gene. Most of patients had mutations in TP53, EGFR, PDGFRA genes. Six patients in our cohort had at least two hotspot mutations associated with cancer according with COSMIC database. Conclusion: Patients with multiple primary neoplasia revealed a large number of poly- morphic variants in the major oncogenes. This data confirms the assumption of strong genetic predisposition to the development of cancer for patients with multiple primary neoplasia. 329 THE TENTH INTERNATIONAL CONFERENCE ON BIOINFORMATICS OF GENOME REGULATION AND STRUCTURE\SYSTEMS BIOLOGY PARASITES OF THE GENERA NOSEMA, APICISTIS, CRITHIDIA AND LOTMARIA IN THE NATURAL HONEYBEE AND BUMBLEBEE POPULATIONS: A CASE STUDY IN INDIA V. Vavilova 1 *, I. Konopatskaia 1, 2 , M. Woyciechowski 3 , S. Luzianin 4 , A. Blinov 1 1 Institute of Cytology and Genetics SB RAS, Novosibirsk, Russia 2 Novosibirsk State University, Novosibirsk, Russia 3 Institute of Environmental Sciences, Jagiellonian University, Krakow, Poland 4 Biological Faculty, Kemerovo State University, Russian Federation * Corresponding author: valeriya-vavilova@bionet.nsc.ru Key words: bumblebees, honeybees, parasite, Nosema, Apicystis, Crithidia, Lotmaria, ribosomal gene cluster, genetic variant Motivation and Aim: In recent decades the populations of important pollinators honey- bees and bumblebees decrease around the world. A variety of pathogens and parasites contribute to significant honeybee and bumblebee colonies loss. Fungal parasites of the genus Nosema (Microsporidia: Nosematidae) and protozoan parasites of the genera Api- cystis (Apicomplexa: Ophryocystidae), Crithidia and Lotmaria (Kinetoplastida: Try- panosomatidae) have a significant negative impact on the honeybee and bumblebee colo- nies. Recent studies of nuclear DNA markers from these parasites allowed to describe new species and genetic variants. Thus, investigation of Nosema, Apicystis, Crithidia and Lotmaria species variability in honeybee and bumblebee populations from previously unstudied territories of states Karnataka and Jammu and Kashmir (India) will allow to identify novel genetic variants of the parasites. Methods and Algorithms: We have analyzed distribution and diversity of parasites in Indian honeybee and bumblebee populations using bioinformatical and molecular bio- logical methods. Results: Identification of the parasites was conducted, using PCR with primers specific for the ribosomal RNA gene cluster of Nosema, Apicystis, Crithidia and Lotmaria species followed by sequencing. In total 80 individual honeybees specimens were tested; twenty and ten specimens revealed presence of Nosema and Lotmaria parasites, respectively. No honeybee’s specimen with Crithidia and Apicystis infection was found in India. Among 39 tested bumblebee specimens four were infected with Nosema spp. and twelve with Crithidia species, while no sample infected with Lotmaria spp. and Apicystis spp. was detected. Comparative analysis of ribosomal RNA genes showed that studied honeybee samples were infected by representatives of two microsporidia species (N. ceranae and N. bombi) and one trypanosomatid species (Lotmaria passim). The bumblebee specimens were infected by Nosema D genetic variant, which was previously described in bumble- bee populations from China, and two Crithidia species (C. bombi and C. expoeki). Conclusion: Thus, in the present study the distribution of Nosema, Apicystis, Crithidia and Lotmaria parasites were investigated in the natural populations of honeybees and bumblebees from states Karnataka and Jammu and Kashmir (India). For the first time N. bombi infection was detected in honeybee populations. Availability: The obtained nucleotide sequences of rRNA genes of Nosema spp., Criti- hidia spp. and L. passim were deposited to GenBank and European Nucleotide Archive. 330 THE TENTH INTERNATIONAL CONFERENCE ON BIOINFORMATICS OF GENOME REGULATION AND STRUCTURE\SYSTEMS BIOLOGY EFFECTS OF LAMBERTIANIC ACID AMIDE ON EPILEPTI- FORM ACTIVITY IN HIPPOCAMPAL SLICES INDUCED BY PICROTOXIN OR MAGNESIUM-FREE MEDIUM S.O. Vechkapova, A.L. Proskura*, T.A. Zapara, E.D. Sorokoumov, A.S. Ratushnyak Design Technological Institute of Digital Techniques SB RAS, Novosibirsk, Russia * Corresponding author: annleop@mail.ru Download 3.91 Kb. Do'stlaringiz bilan baham: |
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