The regulatory region of MS2 phage RNA replicase cistron. III. Characterization of fragments resulting from S1 nuclease digestion.

AUTOR(ES)

Jansone, I

RESUMO

The functionally active fragments MS2 R(-53 leads to 6) and MS2 R(-53 leads to 3) comprising the regulatory region for the replicase cistron have been isolated from MS2 RNA-coat protein complex following T1 RNase digestion. In order to obtain shorter fragments, active in coat protein binding and initiation of translation, MS2 R(-53 leads to 6) was cleaved with S1 nuclease. The results indicate that S1 nuclease attacks the most susceptible loop regions of the two hairpin helices of MSZ R(-53) leads to 6). Among the three fragments which have been isolated, only MS2 R(-35/33 leads to 6) containing the intact hairpin (b) region with initiation codon AUG is active in the coat protein binding. Functional activity exerted by another polynucleotide MS R(-17 leads to 6) supports the assumption that specific binding with the coat protein is determined by the hairpin (b) region prior to the replicase cistron.

Documentos Relacionados

• The regulatory region of phage fr replicase cistron. III. Initiation activity of specific fr RNA fragments.
• The regulatory region of MS2 phage RNA replicase cistron. IV. Functional activity of specific MS2 RNA fragments in formation of the 70 S initiation complex of protein biosynthesis.
• REPLICATION OF VIRAL RNA, III. DOUBLE-STRANDED REPLICATIVE FORM OF MS2 PHAGE RNA*
• Replacement of Ribosomal Protein S1 by Interference Factor iα in Ribosomal Binding of Phage MS2 RNA
• Identification of specific fragments containing the 5' end of poliovirus RNA after ribonuclease III digestion.