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GENOMASGENOMAS
Prof. José Ferreira dos SantosProf. José Ferreira dos Santos
Depto. de GenéticaDepto. de Genética
UFPEUFPE
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Formas de VidaFormas de Vida
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A árvore da vidaA árvore da vida
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GenomaGenoma
Complemento inteiro de moléculas de Complemento inteiro de moléculas de DNA de um organismoDNA de um organismo
Inclui, além dos genes, as regiões Inclui, além dos genes, as regiões intergênicasintergênicas
Além do genoma nuclear, existem Além do genoma nuclear, existem também os genomas das organelastambém os genomas das organelas
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Origem das organelasOrigem das organelas
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Exemplos de genomasExemplos de genomas
VírusVírus BactériasBactérias Arquibactérias Arquibactérias OrganelasOrganelas Microrganismos (eucariotos)Microrganismos (eucariotos) PlantasPlantas AnimaisAnimais
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VírusVírus
•As formas mais simples de vida
•Parasitas intracelulares obrigatórios
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Genomas de bacteriófagosGenomas de bacteriófagos
Fago Hospedeiro Forma Genoma
Tipo Tam (kb) No. genes
MS2 E. coli Icosaédrica RNA lin uf 3,6 3
ФX174 E. coli Icosaédrica DNA circ uf 5,4 11
M13 E. coli Filamentar DNA circ uf 6,4 10
Ф6 Pseudomonas Icosaédrica RNA lin bf 3,3, 4,6 e 7,5 (segmentos)
T7 E. coli Cabeça e cauda DNA lin bf 39,9 55
T4 E. coli Cabeça e cauda DNA lin bf 166 150
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Genoma de Genoma de ФX174ФX174
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Vírus eucariontesVírus eucariontesVírus Hospedeiro Genoma
Tipo Tam (kb) No. genes
Parvovírus Mamíferos DNA lin uf 1,6 5
TMV Vegetais RNA lin uf 6,4 6
SV40 Símios DNA circ bf 5,0 5
Influenza Mamíferos RNA lin seg uf
22,0 12
Retrovírus Mamif., aves RNA lin uf 6 a 9,0 3
Adenovírus Mamíferos DNA lin bf 36,0 30
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BactériasBactérias
•Genomas circulares, de tamanhos variados;
•Genes intactos (sem introns);
•Plasmídios presentes
a) Proteus mirabilis
b) Serratia marcescens
c) Staphylococcus aureus
d) Bacilus cereus
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Plasmídio circular de Plasmídio circular de E. coliE. coli
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Microrganismos eucarióticosMicrorganismos eucarióticos
Aspergillus Saccharomyces
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DNA extra-nuclearDNA extra-nuclear
Plastos (cloroplastos, xantoplastos, Plastos (cloroplastos, xantoplastos, etc)etc)
MitocôndriasMitocôndrias
PlasmídiosPlasmídios
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VegetaisVegetais
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AnimaisAnimais
Linfócito T infectado pelo HIV (azul)
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Eucariotos superioresEucariotos superiores
Genomas de tamanhos variáveis;Genomas de tamanhos variáveis; DNA complexado com histonas;DNA complexado com histonas; Genes interrompidos (introns)Genes interrompidos (introns)
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Classes de DNAClasses de DNA
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Genoma humanoGenoma humano