viral structure & types ethan wright, rachel sylvia, emily mcgreen
TRANSCRIPT
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VIRAL S
TRUCTU
RE &
TYPE
S
ET
HA
N W
RI G
HT
, R
AC
HE
L SY
LVI A
, E
MI L
Y
MC
GR
EE
N
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STRUCTURE
Three components:
- Capsid (capsomeres)
- Genome (3-5 average, - over 100 expressed proteins)
- Envelope (some have this)
- Viral Envelope-viral glycoproteins- derived from host membrane
Mimivirus! – size of small becteria- Bring questions as to evolutionary history
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TYPES OF VIRUSES
- Capsid structure- rod-shaped-polyhedral-or more complex
Host Range
Bacteriophage – viruses that infect bacteria
![Page 4: VIRAL STRUCTURE & TYPES ETHAN WRIGHT, RACHEL SYLVIA, EMILY MCGREEN](https://reader036.vdocument.in/reader036/viewer/2022062421/56649f555503460f94c79459/html5/thumbnails/4.jpg)
I’D LIKE TO INFECT YOU WITH MY DNA ;)
;)
Viral Reproduction
![Page 5: VIRAL STRUCTURE & TYPES ETHAN WRIGHT, RACHEL SYLVIA, EMILY MCGREEN](https://reader036.vdocument.in/reader036/viewer/2022062421/56649f555503460f94c79459/html5/thumbnails/5.jpg)
TWO MECHANISMS OF REPLICATION BY PHAGES:LYTIC AND LYSOGENIC CYCLES
![Page 6: VIRAL STRUCTURE & TYPES ETHAN WRIGHT, RACHEL SYLVIA, EMILY MCGREEN](https://reader036.vdocument.in/reader036/viewer/2022062421/56649f555503460f94c79459/html5/thumbnails/6.jpg)
© 2011 Pearson Education, Inc.
Animation: Phage T4 Lytic CycleRight-click slide / select “Play”
![Page 7: VIRAL STRUCTURE & TYPES ETHAN WRIGHT, RACHEL SYLVIA, EMILY MCGREEN](https://reader036.vdocument.in/reader036/viewer/2022062421/56649f555503460f94c79459/html5/thumbnails/7.jpg)
© 2011 Pearson Education, Inc.
Animation: Phage Lambda Lysogenic and Lytic CyclesRight-click slide / select “Play”
![Page 8: VIRAL STRUCTURE & TYPES ETHAN WRIGHT, RACHEL SYLVIA, EMILY MCGREEN](https://reader036.vdocument.in/reader036/viewer/2022062421/56649f555503460f94c79459/html5/thumbnails/8.jpg)
![Page 9: VIRAL STRUCTURE & TYPES ETHAN WRIGHT, RACHEL SYLVIA, EMILY MCGREEN](https://reader036.vdocument.in/reader036/viewer/2022062421/56649f555503460f94c79459/html5/thumbnails/9.jpg)
EVOLUTION
Replication occurs in host cell
Uses host cell’s organelles to synthesis progeny viruses
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Glycoprotein
Reversetranscriptase HIV
Viral envelope
Capsid
RNA (twoidenticalstrands)
HOSTCELL
Viral RNAReversetranscriptase
RNA-DNAhybrid
DNA
NUCLEUSProvirus
ChromosomalDNA
RNA genomefor thenext viralgeneration
mRNA
New virus
HIV
Membraneof whiteblood cell
0.25 -m
HIV entering a cell
New HIV leaving a cell
FIGURE 19.8
![Page 11: VIRAL STRUCTURE & TYPES ETHAN WRIGHT, RACHEL SYLVIA, EMILY MCGREEN](https://reader036.vdocument.in/reader036/viewer/2022062421/56649f555503460f94c79459/html5/thumbnails/11.jpg)
PATH
OGENICS
K A R A H E A T H E R T O N , J A K E R O S T , G R I F F I N S C H R O E T E R
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Symptoms Severity of the virusVaccineTreatment
VIRAL DISEASE IN ANIMALS & PLANTS
![Page 13: VIRAL STRUCTURE & TYPES ETHAN WRIGHT, RACHEL SYLVIA, EMILY MCGREEN](https://reader036.vdocument.in/reader036/viewer/2022062421/56649f555503460f94c79459/html5/thumbnails/13.jpg)
EpidemicPandemic3 factors1. mutations2. spread from humans3. spread from animals
EMERGING VIRUSES
![Page 14: VIRAL STRUCTURE & TYPES ETHAN WRIGHT, RACHEL SYLVIA, EMILY MCGREEN](https://reader036.vdocument.in/reader036/viewer/2022062421/56649f555503460f94c79459/html5/thumbnails/14.jpg)
VIROIDS AND PRIONS
![Page 15: VIRAL STRUCTURE & TYPES ETHAN WRIGHT, RACHEL SYLVIA, EMILY MCGREEN](https://reader036.vdocument.in/reader036/viewer/2022062421/56649f555503460f94c79459/html5/thumbnails/15.jpg)
I’D LIKE TO INFECT YOU WITH MY DNA ;)
;)
Viral Reproduction
![Page 16: VIRAL STRUCTURE & TYPES ETHAN WRIGHT, RACHEL SYLVIA, EMILY MCGREEN](https://reader036.vdocument.in/reader036/viewer/2022062421/56649f555503460f94c79459/html5/thumbnails/16.jpg)
TWO MECHANISMS OF REPLICATION BY PHAGES:LYTIC AND LYSOGENIC CYCLES
![Page 17: VIRAL STRUCTURE & TYPES ETHAN WRIGHT, RACHEL SYLVIA, EMILY MCGREEN](https://reader036.vdocument.in/reader036/viewer/2022062421/56649f555503460f94c79459/html5/thumbnails/17.jpg)
© 2011 Pearson Education, Inc.
Animation: Phage T4 Lytic CycleRight-click slide / select “Play”
![Page 18: VIRAL STRUCTURE & TYPES ETHAN WRIGHT, RACHEL SYLVIA, EMILY MCGREEN](https://reader036.vdocument.in/reader036/viewer/2022062421/56649f555503460f94c79459/html5/thumbnails/18.jpg)
© 2011 Pearson Education, Inc.
Animation: Phage Lambda Lysogenic and Lytic CyclesRight-click slide / select “Play”
![Page 19: VIRAL STRUCTURE & TYPES ETHAN WRIGHT, RACHEL SYLVIA, EMILY MCGREEN](https://reader036.vdocument.in/reader036/viewer/2022062421/56649f555503460f94c79459/html5/thumbnails/19.jpg)
![Page 20: VIRAL STRUCTURE & TYPES ETHAN WRIGHT, RACHEL SYLVIA, EMILY MCGREEN](https://reader036.vdocument.in/reader036/viewer/2022062421/56649f555503460f94c79459/html5/thumbnails/20.jpg)
EVOLUTION
Replication occurs in host cell
Uses host cell’s organelles to synthesis progeny viruses
![Page 21: VIRAL STRUCTURE & TYPES ETHAN WRIGHT, RACHEL SYLVIA, EMILY MCGREEN](https://reader036.vdocument.in/reader036/viewer/2022062421/56649f555503460f94c79459/html5/thumbnails/21.jpg)
Glycoprotein
Reversetranscriptase HIV
Viral envelope
Capsid
RNA (twoidenticalstrands)
HOSTCELL
Viral RNAReversetranscriptase
RNA-DNAhybrid
DNA
NUCLEUSProvirus
ChromosomalDNA
RNA genomefor thenext viralgeneration
mRNA
New virus
HIV
Membraneof whiteblood cell
0.25 -m
HIV entering a cell
New HIV leaving a cell
FIGURE 19.8
![Page 22: VIRAL STRUCTURE & TYPES ETHAN WRIGHT, RACHEL SYLVIA, EMILY MCGREEN](https://reader036.vdocument.in/reader036/viewer/2022062421/56649f555503460f94c79459/html5/thumbnails/22.jpg)
PA
THOLO
GY
K A R A H E A T H E R T O N , J A K E R O S T , G R I F F I N S C H R O E T E R
![Page 23: VIRAL STRUCTURE & TYPES ETHAN WRIGHT, RACHEL SYLVIA, EMILY MCGREEN](https://reader036.vdocument.in/reader036/viewer/2022062421/56649f555503460f94c79459/html5/thumbnails/23.jpg)
Symptoms Severity of the virusVaccineTreatment
VIRAL DISEASE IN ANIMALS & PLANTS
![Page 24: VIRAL STRUCTURE & TYPES ETHAN WRIGHT, RACHEL SYLVIA, EMILY MCGREEN](https://reader036.vdocument.in/reader036/viewer/2022062421/56649f555503460f94c79459/html5/thumbnails/24.jpg)
EpidemicPandemic3 factors1. mutations2. spread from humans3. spread from animals
EMERGING VIRUSES
![Page 25: VIRAL STRUCTURE & TYPES ETHAN WRIGHT, RACHEL SYLVIA, EMILY MCGREEN](https://reader036.vdocument.in/reader036/viewer/2022062421/56649f555503460f94c79459/html5/thumbnails/25.jpg)
VIROIDS AND PRIONS