Trichosanthin, alpha-momorcharin and beta-momorcharin: identity of abortifacient and ribosome-inactivating proteins. 1988

H W Yeung, and W W Li, and Z Feng, and L Barbieri, and F Stirpe
Department of Biochemistry, Chinese University of Hong Kong, Shatin, N.T.

The abortifacient proteins trichosanthin, alpha-momorcharin and beta-momorcharin at nM concentrations inhibit cell-free protein synthesis. The momorcharins and the ribosome-inactivating proteins isolated from Momordica charantia seeds cross-react with the respective antisera. The ribosome-inactivating proteins saporins, pokeweed antiviral protein (PAP) and, to a lesser extent, gelonin have abortifacient activity on pregnant mice.

UI MeSH Term Description Entries
D010940 Plant Proteins Proteins found in plants (flowers, herbs, shrubs, trees, etc.). The concept does not include proteins found in vegetables for which PLANT PROTEINS, DIETARY is available. Plant Protein,Protein, Plant,Proteins, Plant
D011500 Protein Synthesis Inhibitors Compounds which inhibit the synthesis of proteins. They are usually ANTI-BACTERIAL AGENTS or toxins. Mechanism of the action of inhibition includes the interruption of peptide-chain elongation, the blocking the A site of ribosomes, the misreading of the genetic code or the prevention of the attachment of oligosaccharide side chains to glycoproteins. Protein Synthesis Antagonist,Protein Synthesis Antagonists,Protein Synthesis Inhibitor,Antagonist, Protein Synthesis,Antagonists, Protein Synthesis,Inhibitor, Protein Synthesis,Inhibitors, Protein Synthesis,Synthesis Antagonist, Protein,Synthesis Inhibitor, Protein
D011817 Rabbits A burrowing plant-eating mammal with hind limbs that are longer than its fore limbs. It belongs to the family Leporidae of the order Lagomorpha, and in contrast to hares, possesses 22 instead of 24 pairs of chromosomes. Belgian Hare,New Zealand Rabbit,New Zealand Rabbits,New Zealand White Rabbit,Rabbit,Rabbit, Domestic,Chinchilla Rabbits,NZW Rabbits,New Zealand White Rabbits,Oryctolagus cuniculus,Chinchilla Rabbit,Domestic Rabbit,Domestic Rabbits,Hare, Belgian,NZW Rabbit,Rabbit, Chinchilla,Rabbit, NZW,Rabbit, New Zealand,Rabbits, Chinchilla,Rabbits, Domestic,Rabbits, NZW,Rabbits, New Zealand,Zealand Rabbit, New,Zealand Rabbits, New,cuniculus, Oryctolagus
D012156 Reticulocytes Immature ERYTHROCYTES. In humans, these are ERYTHROID CELLS that have just undergone extrusion of their CELL NUCLEUS. They still contain some organelles that gradually decrease in number as the cells mature. RIBOSOMES are last to disappear. Certain staining techniques cause components of the ribosomes to precipitate into characteristic "reticulum" (not the same as the ENDOPLASMIC RETICULUM), hence the name reticulocytes. Reticulocyte
D002474 Cell-Free System A fractionated cell extract that maintains a biological function. A subcellular fraction isolated by ultracentrifugation or other separation techniques must first be isolated so that a process can be studied free from all of the complex side reactions that occur in a cell. The cell-free system is therefore widely used in cell biology. (From Alberts et al., Molecular Biology of the Cell, 2d ed, p166) Cellfree System,Cell Free System,Cell-Free Systems,Cellfree Systems,System, Cell-Free,System, Cellfree,Systems, Cell-Free,Systems, Cellfree
D000019 Abortifacient Agents Chemical substances that interrupt pregnancy after implantation. Abortifacient Effect,Abortifacient Effects,Abortifacients,Contraceptive Agents, Postconception,Agents, Abortifacient,Agents, Postconception Contraceptive,Effect, Abortifacient,Effects, Abortifacient,Postconception Contraceptive Agents
D000020 Abortifacient Agents, Nonsteroidal Non-steroidal chemical compounds with abortifacient activity. Abortifacient Agents, Non-Steroidal,Abortifacient Agents, Non Steroidal,Agents, Non-Steroidal Abortifacient,Agents, Nonsteroidal Abortifacient,Non-Steroidal Abortifacient Agents,Nonsteroidal Abortifacient Agents
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D012269 Ribosomal Proteins Proteins found in ribosomes. They are believed to have a catalytic function in reconstituting biologically active ribosomal subunits. Proteins, Ribosomal,Ribosomal Protein,Protein, Ribosomal
D012270 Ribosomes Multicomponent ribonucleoprotein structures found in the CYTOPLASM of all cells, and in MITOCHONDRIA, and PLASTIDS. They function in PROTEIN BIOSYNTHESIS via GENETIC TRANSLATION. Ribosome

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