title: Isolation and translation in vitro of poly(A)+RNA from the free-living nematode Panagrellus silusiae.
abstract: Polysomal RNA was isolated from the free-living nematode Panagrellus silusiae. Passage of this RNA through a cellulose column resulted in the fractionation of the input RNA into poly(A)-RNA (ca. 97.5% of the total) and poly(A)+ RNA (ca. 2.5% of the total). RNase digestion, followed by polyacrylamide gel electrophoresis, revealed that the poly(A)+ RNA contained poly(A) tracts that ranged from 75 to 104 nucleotides in length with a mean value of about 90 residues. There was no evidence of poly(A) sequences in the poly(A)- RNA fraction. Poly(A)+ RNA gave a 25- to 50-fold stimulation (over background) of amino acid incorporation in the wheat germ cell-free protein-synthesizing system. At least 26 proteins were evident after electrophoresis in cylindrical sodium dodecyl sulfate-polyacrylamide gels. Poly(A)-RNA was capable of stimulating protein synthesis in vitro with about five discrete proteins being produced. In summary, the properties of mRNA from a simple organism such as P. silusiae are very similar to those of more complex eukaryotes.
mesh_terms: D000818:Animals; D007700:Kinetics; D009348:Nematoda / Q000378:metabolism*; D010944:Plants / Q000378:metabolism; D011061:Poly A / Q000302:isolation & purification / Q000378:metabolism*; D011132:Polyribosomes / Q000378:metabolism; D014176:Protein Biosynthesis; D012335:RNA, Ribosomal / Q000302:isolation & purification / Q000378:metabolism*; D014908:Triticum / Q000378:metabolism
chemical_list: D012335:RNA, Ribosomal; D011061:Poly A