The biochemical nature of the start process that commits budding yeast to DNA synthesis is not known. Kinetic evidence has suggested recently that short-lived protein(s) may have to accumulate to a critical level before the cell cycle may progress towards DNA synthesis and cell division. We investigated by high-reslution two-dimensional electrophoresis whether, in a cdc25-1 mutant strain of Saccharomyces cerevisiae that had been blocked at the regulatory step called 'start' by growth at a restrictive temperature, short-lived proteins are synthesized during the recovery of growth at a permissive temperature. Of the ~500 proteins resolved by the two-dimensional electrophoresis, 6 were short-lived. Only one of them (M(r) = 100,000 pI ~ 4.8-5) appears to be specifically made during the G1-to-S transition at start. A regulatory role for cell cycle progression in yeast is suggested for this protein, p100.

Identification of a labile protein involved in the G1 to S transition in Saccharomyces cerevisiae / L. Popolo, L. Alberghina. - In: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA. - ISSN 0027-8424. - 81:120(1984), pp. 124-124.

Identification of a labile protein involved in the G1 to S transition in Saccharomyces cerevisiae

L. Popolo
Primo
;
1984

Abstract

The biochemical nature of the start process that commits budding yeast to DNA synthesis is not known. Kinetic evidence has suggested recently that short-lived protein(s) may have to accumulate to a critical level before the cell cycle may progress towards DNA synthesis and cell division. We investigated by high-reslution two-dimensional electrophoresis whether, in a cdc25-1 mutant strain of Saccharomyces cerevisiae that had been blocked at the regulatory step called 'start' by growth at a restrictive temperature, short-lived proteins are synthesized during the recovery of growth at a permissive temperature. Of the ~500 proteins resolved by the two-dimensional electrophoresis, 6 were short-lived. Only one of them (M(r) = 100,000 pI ~ 4.8-5) appears to be specifically made during the G1-to-S transition at start. A regulatory role for cell cycle progression in yeast is suggested for this protein, p100.
Settore BIO/11 - Biologia Molecolare
Settore BIO/10 - Biochimica
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/200547
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