title: genoBASE pylori: a genotype search tool and database of the human gastric pathogen Helicobacter pylori.
abstract: Helicobacter pylori is the pathogenic bacterium linked to gastric and duodenal ulcers and gastric carcinoma. Genomic diversity of the organism has enabled new insights into its population biology through comparative genomics. genoBASE pylori is an online databank of several virulence-linked and phylogenetic markers of H. pylori strains obtained from different human populations. This knowledgebase is built upon a relational database management system which is connected to visualize the presence of known, pathogenicity markers such as the co-ordinates within the cag pathogenicity island (cagPAI), the cagA gene and motifs surrounding it, the vacA allotypes and the oipA gene frame status, together with genotypic details in the form of DNA profiling traces and candidate gene sequences for individual strains. This flexible search tool allows inter-laboratory comparison of DNA fingerprinting data in the form of fluorescent amplified fragment length polymorphism (FAFLP), enterobacterial repetitive intergenic consensus (ERIC) and repetitive extragenic palindromic (REP) signature profiles. Besides this, the database also displays diversity of strains based on nucleotide sequences of several house keeping genes and two membrane proteins. Being the first of its kind, genoBASE pylori is expected to be a helpful online tool in strengthening the concept of 'geographic genomics' and will be useful to molecular epidemiologists, clinical laboratory scientists and those interested in diagnostic development for H. pylori. The database can be accessed through its website (http://www.cdfd.org.in/amplibase/HP).
authors.affiliation: Pathogen Evolution Group, Centre for DNA Fingerprinting and Diagnostics, Hyderabad, India. niyaz@cdfd.org.in
authors.forename: Niyaz
authors.initials: N
authors.lastname: Ahmed
authors.forename: Ahmed A
authors.initials: AA
authors.lastname: Majeed
authors.forename: Irshad
authors.initials: I
authors.lastname: Ahmed
authors.forename: M Abid
authors.initials: MA
authors.lastname: Hussain
authors.forename: Ayesha
authors.initials: A
authors.lastname: Alvi
authors.forename: S Manjulata
authors.initials: SM
authors.lastname: Devi
authors.forename: Mohammed
authors.initials: M
authors.lastname: Rizwan
authors.forename: Akash
authors.initials: A
authors.lastname: Ranjan
authors.forename: Leonardo A
authors.initials: LA
authors.lastname: Sechi
authors.forename: Francis
authors.initials: F
authors.lastname: Mégraud
mesh_terms: D019295:Computational Biology / Q000379:methods*; D030561:Databases, Nucleic Acid; D005819:Genetic Markers; D005838:Genotype; D016480:Helicobacter pylori / Q000235:genetics*; D006801:Humans; D012984:Software; D013270:Stomach / Q000382:microbiology*; D014584:User-Computer Interface
chemical_list: D005819:Genetic Markers