Ribonucleasa A from bovine pancreas

Proteína determinada mediante E.

RNase A purity determined by SDS-PAGE

Ribonuclease A from bovine pancreas has been used to treat human glioblastoma U251 cell line prior to harvesting, for flow cytometry analysis, T suppressor cells and embryonic stem cell chromatin.

Ribonuclease A is used to remove RNA from DNA plasmid preparations and protein samples. Ribonuclease A is used for RNase protection assays, to remove unspecifically bound RNA, analysis of RNA sequences, to hydrolyze RNA contained in protein samples, and the purification of DNA. Ribonuclease A from bovine pancreas has been used in a study to assess the mechanism of heavy metal ions on RNase activity. Ribonuclease A from bovine pancreas has also been used in a study to investigate the performance of oligomeric poly(diallyldimethylammonium chloride) as displacer for cation-exchange displacement chromatography of proteins.

Nuestra muy estable ribonucleasa A, ARNasa A, es idónea para la eliminación del ARN, la secuenciación del ARN y la purificación del ADN.

La ARNasa, ribonucleasa A, es una endorribonucleasa que escinde los enlaces fosfodiéster del ARN monocatenario después de nucleótidos de pirimidina. Ataca el extremo 3′ fosfato (por ejemplo, el pG-pG-pC-pA-pG será escindido para dar pG-pG-pCp y A-pG). La mayor actividad la exhibe con ARN monocatenario. La ARNasa A es un polipéptido monocatenario que contiene cuatro puentes bisulfuro. Al contrario que la ARNasa B, no es una glucoproteína. Las ribonucleasas no hidrolizan el ADN porque el ADN carece de los grupos 2′-OH esenciales para la formación de los intermediarios cíclicos. La ARNasa A también puede hidrolizar el ARN de las muestras proteicas. La ARNasa A puede ser inhibida por alquilación de la His12 o la His119 y activada por sales de potasio y de sodio. La RNAasa se inhibe en presencia de iones de los metales pesados. La ARNasa también es inhibida competitivamente por el ADN.

Ribonucleases do not hydrolyze DNA, because the DNA lacks 2′-OH groups essential for the formation of cyclic intermediates. RNase can hydrolyze RNA from protein samples. Pancreatic RNase A specifically cleaves at the 3′-side of pyrimidine (uracil or cytosine) phosphate bonds. The ribonuclease (RNase) gene is mapped to human chromosome 14.

The structure of Ribonuclease A (RNase A) comprises of four disulfide and catalytic triad of two histidines crucial for its functionality. RNase A displays three-dimensional domain swapping of the α-helical N-terminal and the C-terminal β-strand. It can exist as dimer or oligomers. The level of RNase is elevated in cancers and infectious diseases. RNase A family of enzymes serve as potential drug targets. The homolog and variants of RNase A are potential chemotherapeutic agents.

Solution in 0.2 M sodium phosphate buffer, pH 6.4

A further chromatographic purification of R5503 to yield essentially pure RNAse A