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TcSNP –  A map of Trypanosoma cruzi genetic variation


                       WebSite Tour




               Laboratorio de Genómica y Bioinformática
                Instituto de Investigaciones Biotecnológicas
                          Universidad de San Martín
What is TcSNP?



TcSNP  is  an  online  resource  with  information  on 
genetic  variation  (polymorphisms,  mutations)  for 
different  stocks,  strains  and  isolates  of  Trypanosoma 
cruzi, the causative agent of Chagas Disease




June, 2008                                               2
What can you do in TcSNP?

●Access a sequence alignment containing your gene of interest, see 
polymorphic sites, type of mutation, dN/dS ratio, etc.

●Find aligned genes/sequences that satisfy specific rules: participate in a given 
metabolic pathway, has more/less than a given number of SNPs,  has a 
particular dN/dS ratio, etc.

●Find SNPs based on diferent criteria: detected between specific strains, that 
cause synonymous/non­synonymous/non­sense mutations,etc.

●Combine single queries making complex queries (doing unions, intersetions, 
and substractions of queries)

●Explore multiple sequence alignments




June, 2008                                                                     3
home page


Search by 
genes and
alignment
criteria

                                         Examine and
                                         combine your
Search by                                queries
SNPs criteria




Search by 
sequence
similarity
(BLAST)




                http://snps.tcruzi.org

   June, 2008                                           4
search for genes




June, 2008                      5
retrieved list of genes




                  Let's see the alignment




June, 2008                                  6
alignment view: general information




June, 2008                                         7
alignment view: overview




June, 2008                              8
alignment view: aligned sequences with SNPs




June, 2008                                                 9
search for SNPs




        Example SNP Query #1: Find polymorphic sites between two strains 



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retrieved list of SNPs




Let's see more 
information on
 this SNP




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SNP view: general information




Let's see this SNP in its 
alignment


      June, 2008                                             12
SNP in alignment­context




June, 2008                              13
search for SNPs




             Example SNP Query #2: Select high­score SNPs



June, 2008                                                  14
combine queries




June, 2008                     15
combine queries




             Query #3: high­score SNPs detected
              between strains CL Brener and Tul2




June, 2008                                         16
Thanks!




June, 2008             17

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