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Long range base-pairing in the leftward transcription unit of bacteriophage lambda. Characterization by electron microscopy and computer-aided sequence analysis.

Abstract：

:Restriction fragments of bacteriophage lambda DNA corresponding to the major leftward transcription unit were purified, denatured to form single-stranded DNA, self-annealed, and examined by electron microscopy. Three intrastrand stem and loop secondary structures were observed reproducibly and the locations of the paired regions were determined. A method for computer-aided sequence analysis of these regions is presented and used to identify sets of base-pairings likely to account for the observed structures. One loop observed within gene Ea47 is postulated to involve pairing of sequences which include the polypeptide initiation and termination codons. Another loop is postulated to involve pairing of sequences in gene int with sequences located in the gam-cIII region. A third loop appears to involve sequences in and to the right of gene Ea22 paired with sequences located in the bet-gam region. A general discussion of base-pairing which gives rise to long range interactions is presented along with possible effects of the postulated models on gene expression.

journal_name

J Mol Biol

journal_title

Journal of molecular biology

authors

Edlind TD,Cooley TE,Richards SH,Ihler GM

doi

10.1016/0022-2836(84)90070-6

subject

Has Abstract

pub_date

1984-11-05 00:00:00

pages

351-65

issue

3

eissn

0022-2836

issn

1089-8638

pii

0022-2836(84)90070-6

journal_volume

179

pub_type

杂志文章

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