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Richard H. Scheuermann, Ph.D. Department of Pathology, UT Southwestern March 30, 2011 Virus Bioinformatics Resource Centers – ViPR & IRD
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Take home messages NIAID Bioinformatics Resource Centers – Virus Pathogen Resource (ViPR; www.viprbrc.org )www.viprbrc.org – Influenza Research Database (IRD; www.fludb.org )www.fludb.org Free and open access virus database and analysis resources Comprehensive data collection – Sequence, structure, function, phenotype, surveillance, clinical, immune response Integrated – Surveillance metadata with sequence – Sequence features and sequence conservation with protein structures Development and adoption of data standards Data sharing infrastructure and policies Novel approach to identification of genetic determinants of important virus characteristics – Influenza NS1 nuclear export signal and host range
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NIAID RESEARCH RESOURCES
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DMID Resources
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DMID Resources List
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BRCs
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Category A Pathogens
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Category B Pathogens
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Category C Pathogens
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pathogenportal.net Pathogen Portal
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VIPR RESOURCE
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Home page www.viprbrc.org
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13 virus families
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Taxonomy browser
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Taxonomy browser expanded
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Genome statistics
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Search, analyze and save
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Search
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Analysis
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Workbench
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DATA INTEGRATION
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IRD www.fludb.org
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DATA STANDARDS
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CEIRS Network
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Other Data Standards Non-human mammalian surveillance Virus isolate characteristics Immuno-assays Virus passage Virus nomenclature Clinical data
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SURVEILLANCE
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DATA SHARING
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Policies Sequences – 30 days Initial Surveillance Record – 90 days Completed Virus Isolated Record – 1 year
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Submission Infrastructure
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DO VARIATIONS IN NS1 SEQUENCE FEATURES INFLUENCE INFLUENZA VIRUS HOST RANGE?
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SFVT approach VT-1I F D R L E T L I L VT-2I F N R L E T L I L VT-3I F D R L E T I V L VT-4L F D Q L E T L V S VT-5I F D R L E N L T L VT-6I F N R L E A L I L VT-7I Y D R L E T L I L VT-8I F D R L E T L V L VT-9I F D R L E N I V L VT-10I F E R L E T L I L VT-11 L F D Q M E T L V S Influenza A_NS1_nuclear-export-signal_137(10) Identify regions of protein/gene with known structural or functional properties – Sequence Features (SF) alpha-helical region, host protein binding site, enzyme active site, immune epitope Determine the extent of sequence variation for each SF by defining each unique sequence as a Variant Type (VT) High-level, comprehensive grouping of all virus strains by VT membership for each SF independently Genotype-phenotype association statistical analysis (virulence, pathogenesis, host range, immune evasion, drug resistance) While phylogenetics reflect evolutionary history of the virus, it is the focused regions in the viral genes/proteins that effect protein expression, structure and/or protein function that are responsible for important virus characteristics Influenza A_NS1_alpha-helix_171(17)
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ProteinSubtypeFunctionalStructuralImmune EpitopesTotal Count PB2-710564585 PB1-F2-22-6 PB1-65733744 PA-129534565 NS2-237883 NS1-2115458494 NP-1025472512 NAN11026113153 NAN2959106180 M2-41096116 M1-1214286312 HAH1437335376 HAH24102034 HAH3259390481 HAH53144065 HAH7-123 Total9731942274709 Influenza A Sequence Features as of January 2011
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ViPR SFVTs Starting with 3 species – DENV = 192 SF’s – HCV = 335 SF’s – Pox = 14 genes, 295 total SF’s – HSV coming soon w/ DBP Beginning automatic definition for other virus families – Most SF’s pulled from UniProtKB protein annotations IEDB immune epitopes (future)
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NS1 Sequence Features
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VT for SF8 (nuclear export signal)
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VT-1 strains
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VT for SF8 (nuclear export signal)
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Causes of apparent NS1 VT-associated host range restriction Virus spread = capability + opportunity – Phenotypic property of the virus – limited capacity – Founder effect – limited opportunity Restricted spatial-temporal distribution Sampling bias – assumption of random sampling – Oversampling – avian H5N1 in Asia; 2009 H1N1 – Undersampling – large and domestic cats Linkage to causative variant
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VT-10 strains
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VT for SF8 (nuclear export signal)
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VT lineages
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VT-10 lineage
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VT-4 lineage
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VT-4 strains
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VT-4 lineage = B allele/group
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VT-15 & VT-8 lineages
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VT-5 strains
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Summary Compiling list of all known influenza protein sequence features (SFs) in IRD Observed dramatic skewing in NS1 SFVT host distributions In some cases, attributable to sampling biases – VT-1 and Avian H5N1 due to Asian sampling in mid-2000's – VT-2 and human due to 2009 pandemic H1N1 – VT-11 and Other (Environment) in Delaware Bay Performing multivariate statistical analysis to control for confounding variables In other cases, attributable to founder effects – VT-13 and -14 and Viet Nam 2003 However, in other cases these explanations do not appears to be consistent with the data, suggesting that these may indeed be NS1-mediated host range restrictions – Equine VT-10 lineage – Avian VT-4 lineage (B allele/group) – Human VT-8 lineage – Human VT-15 lineage Nuclear export vs linkage disequilibrium?
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63 U.T. Southwestern – Richard Scheuermann – Burke Squires – Jyothi Noronha – Mengya Liu – Victoria Hunt – Shubhada Godbole – Brett Pickett – Ayman Al-Rawashdeh MSSM – Adolfo Garcia-Sastre – Eric Bortz – Gina Conenello – Peter Palese Vecna – Chris Larsen – Al Ramsey LANL – Catherine Macken – Mira Dimitrijevic U.C. Davis – Nicole Baumgarth Northrop Grumman – Ed Klem – Mike Atassi – Kevin Biersack – Jon Dietrich – Wenjie Hua – Wei Jen – Sanjeev Kumar – Xiaomei Li – Zaigang Liu – Jason Lucas – Michelle Lu – Bruce Quesenberry – Barbara Rotchford – Hongbo Su – Bryan Walters – Jianjun Wang – Sam Zaremba – Liwei Zhou IRD SWG – Gillian Air, OMRF – Carol Cardona, Univ. Minnesota – Adolfo Garcia-Sastre, Mt Sinai – Elodie Ghedin, Univ. Pittsburgh – Martha Nelson, Fogarty – Daniel Perez, Univ. Maryland – Gavin Smith, Duke Singapore – David Spiro, JCVI – Dave Stallknecht, Univ. Georgia – David Topham, Rochester – Richard Webby, St Jude SFVT experts – Gillian Air, OMRF – Toru Takimoto, Rochester – Summer Galloway, Emory – Robert Lamb, Northwestern – Benjamin Hale, Mt. Sinai USDA – David Suarez Sage Analytica – Robert Taylor – Lone Simonsen CEIRS Centers Influenza SFVT Acknowledgments
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