INVESTIGADORES
MANAVELLA Pablo Andres
capítulos de libros
Título:
Homeodomain-leucine zipper proteins participating in abiotic stress response in plants
Autor/es:
ARIEL FD, MANAVELLA PA, CHAN RL
Libro:
Plant Stress And Biotechnology
Editorial:
Bioscience Publications
Referencias:
Año: 2006; p. 1 - 11
Resumen:
Development in multicellular organisms results from growth and differentiation and is determined by a specific
program of gene expression. In plants, environmental factors have a great influence on development via
different signal transduction pathways that amplify the original signal and ultimately result in the activation or
repression of certain genes. The synthesis of most eukaryotic proteins is regulated at the transcriptional level.
Such a coordinated regulation depends on the activity of a group of proteins generally called transcription
factors, which are able to enhance or reduce the rate of transcription by facilitating the assembly of the
initiation complex. A typical minimum promoter extends about 100 bp upstream of the transcription initiation
site and includes several sequence elements named proximal promoter sequences. The promoter sequences
that interact with transcription factors are termed cis-acting elements while transcription factors that bind these
cis-acting sequences are called trans-acting factors. Cis-acting elements that are far before the proximal
promoter can exerteither positive or negative control and are termed distal regulatory sequences. Distal cisacting elements involved in gene regulation by hormones and other signaling agents are called response
elements.