title: In vitro splicing reactions in Drosophila Kc nuclear extracts.
abstract: This protocol describes how to generate and analyze products and intermediates in a pre-mRNA splicing reaction. The reaction relies on the use of labeled, capped, synthetic pre-mRNAs, prepared by in vitro transcription, and Drosophila Kc cell culture nuclear extracts. The pre-mRNA substrate is incubated in the nuclear extract under splicing conditions for 1-2 h. The products of the reaction are purified by phenol:chloroform extraction and precipitation with ethanol, and then loaded directly onto a denaturing urea-acrylamide gel. Visualization of the splicing reactions will reveal the pre-mRNA, the spliced mRNA, and the intermediates generated by the first step of splicing. For inefficient reactions, a more sensitive detection method, such as RNase protection, primer extension, or RT-PCR (reverse transcription-polymerase chain reaction), may be required.
authors.forename: Donald C
authors.initials: DC
authors.lastname: Rio
mesh_terms: D000818:Animals; D004330:Drosophila / Q000201:enzymology*; D004591:Electrophoresis, Polyacrylamide Gel; D008967:Molecular Biology / Q000379:methods*; D012322:RNA Precursors / Q000378:metabolism*; D012326:RNA Splicing
chemical_list: D012322:RNA Precursors