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Browsing by Author "Clark, Timothy"

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    Caracterización de la proteína transductora de señal AmtR
    (Universidad Santiago de cali, 2013-03-17) Rojas A, Oscar; Clark, Timothy; Burkovski, Andreas
    Cada año dos millones de toneladas de aminoácidos se producen, la mayoría de ellas por aplicación de Corynebacterium glutamicum en bioprocesos. La industria de aminoácidos está desarrollando métodos para aumentar el rendimiento de la producción. Este desarrollo ha integrado el entendimiento de los mecanismos elaborados para proporcionar un suministro óptimo de nitrógeno para el metabolismo y para superar y sobrevivir a situaciones de limitación de nitrógeno (Muhl, 2009; Hasselt, Sevvana, Burkovski, & Muller, 2009; Beckers et al., 2005). De esta manera, el regulador maestro de control de nitrógeno llamado AmtR es responsable de bloquear la transcripción de diversos genes cuando el nitrógeno está presente en exceso. Este trabajo analiza el fascinante complejo de represión, en la red sofisticada de interacciones, que corresponden a la relación de AmtR con el ADN en un modelo homólogo en 100 ns de dinámica molecular. Donde los resultados revelaron, seis aminoácidos situados en posición correcta en la zona de unión que permiten que interaccionen fuertemente con el ADN y el papel espectacular de aminoácido tirosina en la proteína de unión
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    Characterization of the AmtR signal Transduction-protein.
    (Ingenium, 2013) Rojas, Oscar E.; Clark, Timothy; Burkovski, Andreas
    Each year 2 million tons of amino acids are produced, most of them by application of Corynebacterium glutamicum in bioprocesses. Nowadays the amino acids industry is developing methods to increase the production yield. This development has integrated understanding of the elaborated mechanisms to provide an optimal nitrogen supply for metabolism and to overcome and survive situations of nitrogen limitation (6) (7) (8). In this way the master regulator of nitrogen control called AmtR is responsible to block transcription of various genes when nitrogen is present in surplus. This work analyses the fascinating repression complex, in the sophisticated network of interaction, that correspond to the relation of AmtR with the DNA in a homology model in 100 ns of molecular dynamics. Where the results revealed six amino acids located in a correct position in the binding zone that they permit to interact strongly with the DNA and the spectacular role of amino acid tyrosine in the protein binding.

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