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ribosome-inactivating protein

   Also found in: Dictionary/thesaurus, Legal, Acronyms, Encyclopedia, Wikipedia 0.01 sec.
ribosome-inactivating protein (RIP),
one of a variety of enzymes that cleave the N-glycosidic bond of adenine in a specific ribosomal RNA sequence. Type 1 RIPs are single-chain proteins. Some type 2 RIPs, such as ricin, possess a galactose-specific lectin domain that binds to cell surfaces, making them potent toxins.


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Recently, structure biology studies and X-ray crystallography of the various isoforms of mistletoe lectins, which belong to the type II ribosome-inactivating proteins (RIPII), have led to new insights into substrate preferences and substrate binding.
1. Advances in structure elucidation of mistletoe constituents by Kreis, Wolfgang / Phytomedicine: International Journal of Phytotherapy & Phytopharmacology
Belgium) has patented purified and isolated polynucleotides encoding Type I ribosome-inactivating proteins (RIPs) and analogs of the RIPs having a cysteine available for disulfide bonding to targeting molecules.
XOMA obtains United States patent by BIOTECH Patent News
But Flores and his colleagues have now created hairy roots from the Chinese cucumber that produce good yields of much bigger molecules: ribosome-inactivating proteins that other scientist have demonstrated will inhibit replication of the HIV virus in laboratory tests.
Hairy harvest; bacteria turn roots into chemical factories by Pennisi, Elizabeth / Science News
 
 
 
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