Viroids and Prions Images taken without permission from http://www.newsandevents.utoronto.ca/images5/prions.jpg.

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Presentation transcript:

Viroids and Prions Images taken without permission from http://www.newsandevents.utoronto.ca/images5/prions.jpg

Viroids Circular RNA molecules Infect plants Don’t code for proteins– disrupt regulatory systems in plants Causes growth problems in plants Hepatitis D viroid causes Hepatitis D in humans (in combination with virus) Putative secondary structure of the PSTV (potato spindle tuber viroid).

Prions Infectious proteins Misfolded version of a naturally occurring protein in animals Causes the similar proteins to also misfold

Unique pathogens Do not need to replicate themselves to infect and cause problems Other infectious particles other than viruses

Prion Reproduction Prions cause other similar proteins to also misfold lose function

Animations How Stuff Works Animation http://www.maxanim.com/microbiology/Prion/Prion.htm

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