Cyt c6-3: A new isoform of photosynthetic Cyt c6 exclusive to heterocyst-forming cyanobacteria
In: idUS. Depósito de Investigación de la Universidad de Sevilla instname Digital.CSIC. Repositorio Institucional del CSIC; (2017)
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Zugriff:
All known cyanobacteria contain Cyt c6, a small soluble electron carrier protein whose main function is to transfer electrons from the Cyt b6f complex to PSI, although it is also involved in respiration. We have previously described a second isoform of this protein, the Cyt c6-like, whose function remains unknown. Here we describe a third isoform of Cyt c6 (here called Cytc6-3), which is only found in heterocyst-forming filamentous cyanobacteria. Cyt c6-3 is expressed in vegetative cells but is specifically repressed in heterocysts cells under diazotrophic growth conditions. Although there is a close structural similarity between Cyt c6-3 and Cyt c6 related to the general protein folding, Cyt c6-3 presents differential electrostatic surface features as compared with Cyt c6, its expression is not copper dependent and has a low reactivity towards PSI. According to the different expression pattern, functional reactivity and structural properties, Cyt c6-3 has to play an as yet to be defined regulatory role related to heterocyst differentiation.https://doi.org/10.1093/pcp/pcw184
This work has been supported by the Fundación de Investigación de la Universidad de Sevilla (FIUS, Spain) [grant FIUS05710000]; the Ministerio de Economía y Competitividad, Spain [grants BIO2012-35271 and BIO2015-64169-P]; the Andalusian Government [PAIDI BIO-022] and FEDER.
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Cyt c6-3: A new isoform of photosynthetic Cyt c6 exclusive to heterocyst-forming cyanobacteria
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Autor/in / Beteiligte Person: | Valladares, Ana ; Navarro, José A. ; Puerto-Galán, Leonor ; Torrado, Alejandro ; Molina-Heredia, Fernando P. ; Hervás, Manuel ; Universidad de Sevilla. Departamento de Bioquímica Vegetal y Biología Molecular ; Fundación de Investigación de la Universidad de Sevilla ; Junta de Andalucía ; Ministerio de Economía y Competitividad (España) |
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Quelle: | idUS. Depósito de Investigación de la Universidad de Sevilla instname Digital.CSIC. Repositorio Institucional del CSIC; (2017) |
Veröffentlichung: | Oxford University Press, 2017 |
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