Mediadores específicos de secuencia de ARN de interferencia de ARN

• Main Authors: BARTEL, DAVID P, TUSCHL, THOMAS, SHARP, PHILLIP A, ZAMORE, PHILLIP D
• Format: Patent
• Language: Spanish
• Published: 21.05.2014
• Subjects: AGRICULTURE; ANIMAL HUSBANDRY; BEER; BIOCHEMISTRY; CARE OF BIRDS, FISHES, INSECTS; CHEMISTRY; COMPOSITIONS OR TEST PAPERS THEREFOR; COMPOSITIONS THEREOF; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL ORENZYMOLOGICAL PROCESSES; CULTURE MEDIA; DERIVATIVES THEREOF; ENZYMOLOGY; FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIREDCHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERSFROM A RACEMIC MIXTURE; FISHING; FORESTRY; HUMAN NECESSITIES; HUNTING; HYGIENE; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEICACIDS OR MICROORGANISMS; MEDICAL OR VETERINARY SCIENCE; METALLURGY; MICROBIOLOGY; MICROORGANISMS OR ENZYMES; MUTATION OR GENETIC ENGINEERING; NEW BREEDS OF ANIMALS; NEW PLANTS OR PROCESSES FOR OBTAINING THEM; NUCLEIC ACIDS; NUCLEOSIDES; NUCLEOTIDES; ORGANIC CHEMISTRY; PHYSICS; PLANT REPRODUCTION BY TISSUE CULTURE TECHNIQUES; PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES; PROCESSES OF PREPARING SUCH COMPOSITIONS; PROPAGATING, PRESERVING OR MAINTAINING MICROORGANISMS; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS ORMEDICINAL PREPARATIONS; SPIRITS; SUGARS; TESTING; TRAPPING; VINEGAR; WINE

ARN de doble hebra aislado desde 21 hasta 23 nucleótidos de longitud, en forma de dos hebras de ARN separadas, que es perfectamente complementario a un ARNm y media interferencia de ARN por escisión directa del ARNm al que es perfectamente complementario, en el que la escisión del ARNm se dirige dentro de la región que es perfectamente complementaria con el ARN aislado. Double-stranded RNA (dsRNA) induces sequence-specific post-transcriptional gene silencing in many organisms by a process known as RNA interference (RNAi). Using a Drosophila in vitro system, we demonstrate that 19-23 nt short RNA fragments are the sequence-specific mediators of RNAi. The short interfering RNAs (siRNAs) are generated by an RNase III-like processing reaction from long dsRNA. Chemically synthesized siRNA duplexes with overhanging 3' ends mediate efficient target RNA cleavage in the lysate, and the cleavage site is located near the center of the region spanned by the guiding siRNA. Furthermore, we provide evidence that the direction of dsRNA processing determines whether sense or antisense target RNA can be cleaved by the produced siRNP complex.