Artículos de revistas
Spontaneous circadian rhythms in a cold-adapted natural isolate of Aureobasidium pullulans
Fecha
2017-10Registro en:
Franco, Diana Lorena; Canessa, Paulo; Bellora, Nicolás; Risau Gusman, Sebastian Luis; Olivares Yañez, Consuelo; et al.; Spontaneous circadian rhythms in a cold-adapted natural isolate of Aureobasidium pullulans; Nature Publishing Group; Scientific Reports; 7; 1; 10-2017; 1-12; 13837
2045-2322
CONICET Digital
CONICET
Autor
Franco, Diana Lorena
Canessa, Paulo
Bellora, Nicolás
Risau Gusman, Sebastian Luis
Olivares Yañez, Consuelo
Pérez Lara, Rodrigo
Libkind Frati, Diego
Larrondo, Luis F.
Marpegan, Luciano
Resumen
Circadian systems enable organisms to synchronize their physiology to daily and seasonal environmental changes relying on endogenous pacemakers that oscillate with a period close to 24 h even in the absence of external timing cues. The oscillations are achieved by intracellular transcriptional/translational feedback loops thoroughly characterized for many organisms, but still little is known about the presence and characteristics of circadian clocks in fungi other than Neurospora crassa. We sought to characterize the circadian system of a natural isolate of Aureobasidium pullulans, a cold-adapted yeast bearing great biotechnological potential. A. pullulans formed daily concentric rings that were synchronized by light/dark cycles and were also formed in constant darkness with a period of 24.5 h. Moreover, these rhythms were temperature compensated, as evidenced by experiments conducted at temperatures as low as 10 °C. Finally, the expression of clock-essential genes, frequency, white collar-1, white collar-2 and vivid was confirmed. In summary, our results indicate the existence of a functional circadian clock in A. pullulans, capable of sustaining rhythms at very low temperatures and, based on the presence of conserved clock-gene homologues, suggest a molecular and functional relationship to well-described circadian systems.