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PMID: 4916921 Published · ppublish English Journal Article

Properties of a temperature-sensitive, radiation-sensitive mutant of Escherichia coli. II. DNA replication.

Pauling C, Hamm L

Abstract

We have described a temperature-sensitive, radiation-sensitive mutant of Escherichia coli. In vitro assays have demonstrated that DNA ligase activity is markedly reduced in this strain relative to that of the parent strain. Okazaki fragments of newly replicated DNA accumulate in this mutant strain upon growth at the restrictive temperature. These results imply that the same enzyme, DNA ligase, functions both in normal semiconservative replication and in nonconservative repair replication of DNA.

MeSH Terms
Centrifugation, Density Gradient DNA Replication Escherichia coli/enzymology,radiation effects Ligases/analysis Mutation Nucleic Acid Denaturation Phosphorus Isotopes Temperature Tritium
Chemicals
Phosphorus Isotopes Tritium Ligases
Authors & Affiliations
2 authors, click to expand affiliations / ORCID
Pauling C
Hamm L
References (8)
8 references, click to expand
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    Proc Natl Acad Sci U S A. 1967 May;57(5):1426-33 PMID: 5341238
  2. Formation of covalent circles of lambda DNA by E. coli extracts.
    Proc Natl Acad Sci U S A. 1967 Jan;57(1):148-55 PMID: 4860192
  3. Mechanism of DNA chain growth. I. Possible discontinuity and unusual secondary structure of newly synthesized chains.
    Proc Natl Acad Sci U S A. 1968 Feb;59(2):598-605 PMID: 4967086
  4. Properties of a temperature-sensitive radiation-sensitive mutant of Escherichia coli.
    Proc Natl Acad Sci U S A. 1968 Aug;60(4):1495-502 PMID: 4877274
  5. Intermediates in T4 DNA replication in a T4 ligase deficient strain.
    Cold Spring Harb Symp Quant Biol. 1968;33:145-50 PMID: 4891959
  6. Involvement of synthesis of RNA in thymineless death.
    Nature. 1963 Apr 20;198:286 PMID: 13952474
  7. ISOLATION OF THE GROWING POINT IN THE BACTERIAL CHROMOSOME.
    Proc Natl Acad Sci U S A. 1964 Jul;52:125-32 PMID: 14192649
  8. EVIDENCE FOR REPAIR-REPLICATION OF ULTRAVIOLET DAMAGED DNA IN BACTERIA.
    J Mol Biol. 1964 Aug;9:395-410 PMID: 14202275
Article Info
Journal
Proceedings of the National Academy of Sciences of the United States of America
Abbr.
Proc Natl Acad Sci U S A
ISSN
0027-8424
Published
1969-12-00
Pages
1195-202
Language
English
Region
United States
NLM ID
7505876
PMCID
PMC223268
Subset
IM
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