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Abstract:

The genetic set up and the enzymes that define the O-glycosylation sites and transfer the activated sugars to cell wall glycoprotein Extensins (EXTs) have remained unknown for a long time. We are now beginning to see the emerging components of the molecular machinery that assembles these complex O-glycoproteins on the plant cell wall. Genes conferring the posttranslational modifications, i.e., proline hydroxylation and subsequent O-glycosylation, of the EXTs have been recently identified. In this review we summarize the enzymes that define the O-glycosylation sites on the O-glycoproteins, i.e., the prolyl 4-hydroxylases (P4Hs), the glycosyltransferases that transfer arabinose units (named arabinosyltransferases, AraTs), and the one responsible for transferring a single galactose (galactosyltransferase, GalT) on the protein EXT backbones. We discuss the effects of posttranslational modifications on the structure and function of extensins in plant cell walls.

Registro:

Documento: Artículo
Título:Recent advances on the posttranslational modifications of EXTs and their roles in plant cell walls
Autor:Velasquez, M.; Salter, J.S.; Dorosz, J.G.; Petersen, B.L.; Estevez, J.M.
Filiación:Instituto de Fisiología, Biología Molecular y Neurociencias (IFIByNE-CONICET), Universidad de Buenos Aires, Buenos Aires, Argentina
Department of Plant Biology and Biotechnology, University of Copenhagen, Copenhagen, Denmark
Palabras clave:Cell expansion; Extensins; O-glycoproteins; O-glycosylation; Plant cell wall; Proline hydroxylation
Año:2012
Volumen:3
Número:MAY
DOI: http://dx.doi.org/10.3389/fpls.2012.00093
Título revista:Frontiers in Plant Science
Título revista abreviado:Front. Plant Sci.
ISSN:1664462X
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1664462X_v3_nMAY_p_Velasquez

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Citas:

---------- APA ----------
Velasquez, M., Salter, J.S., Dorosz, J.G., Petersen, B.L. & Estevez, J.M. (2012) . Recent advances on the posttranslational modifications of EXTs and their roles in plant cell walls. Frontiers in Plant Science, 3(MAY).
http://dx.doi.org/10.3389/fpls.2012.00093
---------- CHICAGO ----------
Velasquez, M., Salter, J.S., Dorosz, J.G., Petersen, B.L., Estevez, J.M. "Recent advances on the posttranslational modifications of EXTs and their roles in plant cell walls" . Frontiers in Plant Science 3, no. MAY (2012).
http://dx.doi.org/10.3389/fpls.2012.00093
---------- MLA ----------
Velasquez, M., Salter, J.S., Dorosz, J.G., Petersen, B.L., Estevez, J.M. "Recent advances on the posttranslational modifications of EXTs and their roles in plant cell walls" . Frontiers in Plant Science, vol. 3, no. MAY, 2012.
http://dx.doi.org/10.3389/fpls.2012.00093
---------- VANCOUVER ----------
Velasquez, M., Salter, J.S., Dorosz, J.G., Petersen, B.L., Estevez, J.M. Recent advances on the posttranslational modifications of EXTs and their roles in plant cell walls. Front. Plant Sci. 2012;3(MAY).
http://dx.doi.org/10.3389/fpls.2012.00093