  Cell wall proteins are essential constituents of plant cell walls; they are
involved in modifications of cell wall components, wall structure, signaling
and interactions with plasma membrane proteins at the cell surface. The
application of proteomic approaches to the cell wall compartment raises
important questions: are there technical problems specific to cell wall
proteomics? What kinds of proteins can be found in Arabidopsis walls? Are some
of them unexpected? What sort of post-translational modifications have been
characterized in cell wall proteins to date? The purpose of this review is to
discuss the experimental results obtained to date using proteomics, as well as
some of the new questions challenging future research.
