Scientific Commons: Rakefet Schwarz

A response regulator of cyanobacteria integrates diverse environmental signals and is critical for survival under extreme conditions

Schwarz, Rakefet, Grossman, Arthur R.

Microorganisms must sense their environment and rapidly tune their metabolism to ambient conditions to efficiently use available resources. We have identified a gene encoding a response regulator,...

Oxidative Stress in Synechococcus sp. Strain PCC 7942: Various Mechanisms for H2O2 Detoxification with Different Physiological Roles

Perelman, Alexander, Uzan, Avraham, Hacohen, Dalia, Schwarz, Rakefet

This study focuses on the mechanisms for hydrogen peroxide detoxification in Synechococcus sp. strain PCC 7942. To gain better understanding of the role of different routes of hydrogen peroxide...

Is There a Role for the 42 Kilodalton Polypeptide in Inorganic Carbon Uptake by Cyanobacteria? 1

Schwarz, Rakefet, Friedberg, Devorah, Kaplan, Aaron

Cyanobacterial cells accumulate substantial amounts of a membrane-associated 42 kilodalton polypeptide during adaptation to low CO2 conditions. The role of this polypeptide in the process of...

High CO2 Requiring Mutant of Anacystis nidulans R21

Marcus, Yehouda, Schwarz, Rakefet, Friedberg, Devorah, Kaplan, Aaron

Some physiological characteristics of a mutant (E1) of Anacystis nidulans R2, incapable of growing at air level of CO2, are described. E1 is capable of accumulating inorganic carbon (Ci) internally...

A Cyanobacterial Gene Encoding Peptidyl-Prolyl cis-trans Isomerase 1

Hassidim, Miriam, Schwarz, Rakefet, Lieman-Hurwitz, Judy, Marco, Eduardo, Ronen-Tarazi, Michal, Kaplan, Aaron

The rotA gene encoding peptidyl-prolyl cis-trans isomerase has been identified, sequenced, and shown to be transcribed in the cyanobacterium Synechococcus sp. PCC7942. Inactivation of the gene by...

Phenotypic Complementation of High CO2-Requiring Mutants of the Cyanobacterium Synechococcus sp. Strain PCC 7942 by Inosine 5′-Monophosphate 1

Schwarz, Rakefet, Lieman-Hurwitz, Judy, Hassidim, Miriam, Kaplan, Aaron

The high CO2-requiring mutants of Synechococcus PCC 7942, D4 and R14, were obtained by deletion or inactivation (respectively) of an open reading frame immediately downstream of rbc (the operon...

Physiological and Molecular Aspects of the Inorganic Carbon-Concentrating Mechanism in Cyanobacteria 1

Kaplan, Aaron, Schwarz, Rakefet, Lieman-Hurwitz, Judy, Reinhold, Leonora

This paper reviews progress made in elucidating the inorganic carbon concentrating mechanism in cyanobacteria at the physiological and molecular levels. Emphasis is placed on the mechanism of...

Alanine Dehydrogenase Activity Is Required for Adequate Progression of Phycobilisome Degradation during Nitrogen Starvation in Synechococcus elongatus PCC 7942†

Lahmi, Roxane, Sendersky, Eleonora, Perelman, Alexander, Hagemann, Martin, Forchhammer, Karl, Schwarz, Rakefet

Degradation of the cyanobacterial light-harvesting antenna, the phycobilisome, is a general acclimation response that is observed under various stress conditions. In this study we identified a novel...