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The growth and partition of cell membranes during synchronized division cycle of Caulobacter crescentus

The growth and partition of cell membranes during synchronized division cycle of Caulobacter... 203 94 94 2 2 Francesco Galdiero Institute of Microbiology University of Naples Naples Istituto di Microbiologia dell' Università di Napoli Sant' Andrea Delle Dame 2 I-80138 Napoli Italy Summary The growth and division of cell membranes in Caulobacter crescentus has been studied. This microorganism divides into flagellated and stalked cells which are easily separated by centrifugation. The biosynthesis and partition of membranes was studied by labeling the proteins with ( 3 H)-leucine and the lipids with ( 32 P). The membranes were prepared from cell spheroplasts. They further purified on a sucrose gradient. The data obtained show changes of the rate of synthesis of membranes in C. crescentus during the first synchronized division cycle (110 min): the rate is faster in the first 70 min and it drops by 26% during the following 40 min. During the period of faster synthesis the flagellated cells are changing into stalked cells while doubling in size. There is also an intracellular pool of membrane precursors the quantity of which almost doubles as the rate of membrane synthesis decreases, i.e., before cell division. The macromolecules constituting the membranes are not degraded. After division, in each membrane of the two morphologically different cell types the specific radioactivity is 50% of that of the parent cell membranes. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Archives of Microbiology Springer Journals

The growth and partition of cell membranes during synchronized division cycle of Caulobacter crescentus

Galdiero, Francesco
Archives of Microbiology , Volume 94 (2) – Jun 1, 1973
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References (12)

Publisher
Springer Journals
Copyright
Copyright © 1973 by Springer-Verlag
Subject
Life Sciences; Biotechnology; Biochemistry, general; Cell Biology; Ecology; Microbial Ecology; Microbiology
ISSN
0302-8933
eISSN
1432-072X
DOI
10.1007/BF00416687
Publisher site
See Article on Publisher Site

Abstract

203 94 94 2 2 Francesco Galdiero Institute of Microbiology University of Naples Naples Istituto di Microbiologia dell' Università di Napoli Sant' Andrea Delle Dame 2 I-80138 Napoli Italy Summary The growth and division of cell membranes in Caulobacter crescentus has been studied. This microorganism divides into flagellated and stalked cells which are easily separated by centrifugation. The biosynthesis and partition of membranes was studied by labeling the proteins with ( 3 H)-leucine and the lipids with ( 32 P). The membranes were prepared from cell spheroplasts. They further purified on a sucrose gradient. The data obtained show changes of the rate of synthesis of membranes in C. crescentus during the first synchronized division cycle (110 min): the rate is faster in the first 70 min and it drops by 26% during the following 40 min. During the period of faster synthesis the flagellated cells are changing into stalked cells while doubling in size. There is also an intracellular pool of membrane precursors the quantity of which almost doubles as the rate of membrane synthesis decreases, i.e., before cell division. The macromolecules constituting the membranes are not degraded. After division, in each membrane of the two morphologically different cell types the specific radioactivity is 50% of that of the parent cell membranes.

Journal

Archives of Microbiology – Springer Journals

Published: Jun 1, 1973

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