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Process of Infection with Bacteriophage φX174 XXXIV. Kinetics of the Attachment and Eclipse Steps of the Infection

Newbold, John E. and Sinsheimer, Robert L. (1970) Process of Infection with Bacteriophage φX174 XXXIV. Kinetics of the Attachment and Eclipse Steps of the Infection. Journal of Virology, 5 (4). pp. 427-431. ISSN 0022-538X. PMCID PMC376022.

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The products of {varphi}X cistrons II, III, and VII are demonstrated to affect the attachment of the phage to its host Escherichia coli C; therefore, by inference, these cistrons influence, directly or indirectly, the structure of proteins in the virus particle. Two of the mutations which alter attachment kinetics, ts79 in cistron III and h in cistron VII, also affect the electrophoretic mobility of the virus and emphasize the role of charge in the attachment interaction with the host. The kinetics for attached phage to go into "eclipse" are first-order and biphasic; about 85% of the phage eclipse at one rate (ke = 0.86 min^–1) and the remainder do so at a distinctly lower rate (ke = 0.21 min^–1). No {varphi}X cistrons yet identified affect the eclipse process. The lowest temperature at which eclipse is detected is 19 C. The Arrhenius activation energy for phage eclipse has the high value of 36.6 kcal/mole, indicating the cooperative nature of the event.

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Additional Information:Copyright © 1970 American Society for Microbiology. Received for publication 13 October 1969. This research was supported by Public Health Service grant GM-13554 from the National Institute of General Medical Sciences. J.E.N. gratefully acknowledges the support of fellowships sponsored by the McCallum Fund and the Woodrow Wilson Foundation.
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Issue or Number:4
PubMed Central ID:PMC376022
Record Number:CaltechAUTHORS:NEWjvir70
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ID Code:11000
Deposited By: Archive Administrator
Deposited On:22 Jun 2008
Last Modified:03 Oct 2019 00:15

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