title: The composition of untranslated regions in Trypanosoma cruzi genes.
abstract: We collected the UTRs from Trypanosomacruzi genes that have been experimentally mapped and are publicly available, and made a comprehensive analysis of their composition features including sequence length, G+C content and relationship to ORF, composition of the most frequent words, and distribution of Simple Sequence Repeats (SSR). T. cruzi UTRs exhibit range length of 10-400bp for 5' UTR and 17-2800 for 3' UTR. Both UTRs display mean G+C content of 40%. Ratios between the UTR and protein coding segments show that the 5' UTR is limited to a maximum of 20% of the total length in the final transcript. The 5' UTR most frequent words in the range 4-12 bases are almost exact complement to the 3' UTR respective words. SSR in 3' UTR are longer than in 5' UTR and are mostly derived from TA/AT, TG/GT, and TTA/ATT. SSR accounts up to 20% of the nucleotide composition in 5' UTR and up to 90% in the 3' UTR.
authors.affiliation: Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro, Brazil. abrandao@fiocruz.br
authors.forename: Adeilton
authors.initials: A
authors.lastname: Brandão
authors.forename: Taijiao
authors.initials: T
authors.lastname: Jiang
mesh_terms: D020413:3' Untranslated Regions / Q000737:chemistry / Q000235:genetics; D020121:5' Untranslated Regions / Q000235:genetics; D000818:Animals; D001482:Base Composition / Q000235:genetics; D001483:Base Sequence; D019295:Computational Biology; D018895:Microsatellite Repeats / Q000235:genetics; D016366:Open Reading Frames / Q000235:genetics; D014349:Trypanosoma cruzi / Q000235:genetics* / Q000378:metabolism
chemical_list: D020413:3' Untranslated Regions; D020121:5' Untranslated Regions