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Toxic Plant Proteins (Hardcover, 2010 ed.)
Loot Price: R4,264
Discovery Miles 42 640
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Toxic Plant Proteins (Hardcover, 2010 ed.)
Series: Plant Cell Monographs, 18
Expected to ship within 10 - 15 working days
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Many plants produce enzymes collectively known as
ribosome-inactivating proteins (RIPs). RIPs catalyze the removal of
an adenine residue from a conserved loop in the large ribosomal
RNA. The adenine residue removed by this depurination is crucial
for the binding of elongation factors. Ribosomes modified in this
way are no longer able to carry out protein synthesis. Most RIPs
exist as single polypeptides (Type 1 RIPs) which are largely
non-toxic to mammalian cells because they are unable to enter them
and thus cannot reach their ribosomal substrate. In some instances,
however, the RIP forms part of a heterodimer where its partner
polypeptide is a lectin (Type 2 RIPs). These heterodimeric RIPs are
able to bind to and enter mammalian cells. Their ability to reach
and modify ribosomes in target cells means these proteins are some
of the most potently cytotoxic poisons found in nature, and are
widely assumed to play a protective role as part of the host
plant's defenses. RIPs are able to further damage target cells by
inducing apoptosis. In addition, certain plants produce lectins
lacking an RIP component but which are also cytotoxic. This book
focuses on the structure/function and some potential applications
of these toxic plant proteins.
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