Recent advances on the posttranslational modifications of EXTs and their roles in plant cell walls

Melina Velasquez, Juan Salgado Salter, Javier Gloazzo Dorosz, Bent L. Petersen, José M. Estevez

Resultado de la investigación: Contribución a una revistaArtículo de revisiónrevisión exhaustiva

35 Citas (Scopus)

Resumen

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.

Idioma originalInglés
Número de artículo93
PublicaciónFrontiers in Plant Science
Volumen3
N.ºMAY
DOI
EstadoPublicada - 15 may 2012
Publicado de forma externa

Áreas temáticas de ASJC Scopus

  • Botánica

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