ATP-binding cassette-like transporters are involved in the transport of lignin precursors across plasma and vacuolar membranes.

ABSTRACT: Lignin is a complex biopolymer derived primarily from the condensation of three monomeric precursors, the monolignols. The synthesis of monolignols occurs in the cytoplasm. To reach the cell wall where they are oxidized and polymerized, they must be transported across the cell membrane. However, the molecular mechanisms underlying the transport process are unclear. There are conflicting views about whether the transport of these precursors occurs by passive diffusion or is an energized active process; further, we know little about what chemical forms are required. Using isolated plasma and vacuolar membrane vesicles prepared from Arabidopsis, together with applying different transporter inhibitors in the assays, we examined the uptake of monolignols and their derivatives by these native me

SUBMITTER: Miao YC 

PROVIDER: S-EPMC3012465 | biostudies-literature | 2010 Dec

REPOSITORIES: biostudies-literature