
handle: 10261/165118 , 10902/11502
[ES]: En la levadura Saccharomyces cerevisiae, la contracción del anillo de actinomiosina va acompañada de la síntesis de un septo de quitina por parte de la proteína Chs2. Para entender este enzima, se probó un estudio con un enfoque estructural, en el que no se obtuvo suficiente proteína. Así, se cambió el estudio a un enfoque genético, en el cual se estudió la influencia de la proteína Cyk3 en la síntesis de quitina por parte de Chs2 y la contracción del anillo de actinomiosina. Cyk3 interacciona físicamente con Chs2 a través de fragmentos que contienen un dominio similar a transglutaminasa. Dicho dominio es además crucial para la inducción de la actividad quitín sintasa en Chs2 por parte de Cyk3. Finalmente, se propuso un modelo de coordinación de la contracción del anillo de actinomiosina con la síntesis del septo de quitina en citoquinesis en la levadura Saccharomyces cerevisiae.
[EN]: In budding yeast Saccharomyces cerevisiae, contraction of the actomyosin ring is coupled to the synthesis of a chitinous septum by Chs2 protein. To understand how this enzyme works, we tried a structural approach, which did not succeed as we did not have enough protein to work with. Hence, we switched to a genetic approach, in which we studied the influence of Cyk3 protein in chitin synthesis from Chs2 and the contraction of the actomyosin ring. Cyk3 interacts physically with Chs2 through fragments containing a transglutaminase-like domain. This domain is also crucial for the induction of Chs2 chitin synthase activity from Cyk3. Finally, a coordination model was proposed between the contraction of the actomyosin ring with the synthesis of a chitin septum between mother and daughter cells during cytokinesis in budding yeast Saccharomyces cerevisiae.
Tesis doctoral presentada por Iago Molist Pérez para optar al Grado de Doctor por la Universidad de Cantabria y que ha sido realizada en el Instituto de Biomedicina y Biotecnología de Cantabria (IBBTEC) y la Facultad de Medicina de la Universidad de Cantabria en Santander.
La financiación necesaria para la realización de esta Tesis ha sido aportada por el Ministerio de Economía y Competitividad, gracias a la ayuda predoctoral de formación de personal investigador (FPI) BES-2012-058697, asociada al proyecto BFU2011-23193.
Peer Reviewed
Chitin, Actomyosin, Septum, Quitina, Levadura, Yeast, Saccharomyces, Citoquinesis, Cyk3, División, Actinomiosina, Division, Septo, Cytokinesis, Chs2
Chitin, Actomyosin, Septum, Quitina, Levadura, Yeast, Saccharomyces, Citoquinesis, Cyk3, División, Actinomiosina, Division, Septo, Cytokinesis, Chs2
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