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Group # 1 presentation

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  • It can cause Mycobacterium tuberculosis, bacteria that cause lung disease.Mycobacterium leprosy cause leprosy
  • The tail is where the DNA is injected to the bacteria
  • Life cycles are related to the ways that they can infect bacteria and reproduce.
  • Infect the host by attaching to the outer membrane of the bacterial cell. 2) the genetic material is injected into the bacteria Degradation of the host bacterial chromosomal DNA ( eliminate competing instructions from the bacterial genome) Phage replicates 5) phage assembly: the phage genomic DNA is packaged within the mature protein coat6) Bacterial cell lysis
  • Used by temperate phage 2) characterized by phage integration into the bacterial chromosome.Steps: 1) the genetic is injected into the bacteria 2) the entering phage genome is confronted with a decision to determine which of two pathways to follow.3) If the environment conditions are favorable integration occurs. ( the phage inserts its genome into the host chromosome). After this genome is replicated and each dividing cell receive a copy.4) Unfavorable conditions cause excision ( phage genome exit the host chromosome) followed by the lytic cycle.
  • Transcript

    • 1. THE INSIDE LOOK OF BACTERIOPHAGES LYTIC AND LYSOGENIC CYCLES OF BACTERIOPHAGE Nicole Colón, Astrid Díaz, Lysander Borrero y Alberto Cintrón
    • 2. OBJECTIVES:• Explain what mycobacteriophages are and why are they important.• Distinguish between bacteriophage lytic and lysogenic cycles.
    • 3. MYCOBACTERIOPHAGES• Viruses that infect bacteria belonging to the mycobacteria genus.• Can be found in the environment, including soil.• Can cause diseases• Are used as a model to study biological process Institute for Molecular Virology. University of Wisconsin . 2005
    • 4. BACTERIOPHAGE STRUCTURE DNA Head Tail
    • 5. LIFE STYLES• Mycobactheriophage can be group according to their life styles.• Two different life cycle: a) Lytic cycle b) Lysogenic cycle
    • 6. Lytic Cycle Used by virulent phages Is characterized by phagereproduction followed by hostcell lysis.
    • 7. LYSOGENIC CYCLE
    • 8. LIFE CYCLE VIDEO• http://highered.mcgraw- hill.com/sites/0072556781/student_view0/chapter17 /animation_quiz_2.html
    • 9. REFERENCES• Rubin M.2012.Cluster Classification of Mycobacteriophages Isolated From Tropical Soils of Puerto Rico.• Prescott.Harley.Klein.2005.Microbiology. 6th edition. McGraw-Hill Higher Education.• About Biology. Regina Bailey. (unknown). Bacteriophages.
    • 10. ACKNOWLEDGMENTS• Dr. Rubin• TA: Melisa Medina• TA: Valeria Rivera• RISE Program
    • 11. THANKS FOR YOUR ATTENTION !
    • 12. QUESTIONS ?
    • 13. Table 1
    • 14. Figure 1
    • 15. Table 2 AyB

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