LIM PROTEINS AND THE ACTIN CYTOSKELETON
The actin cytoskeleton is a complex network whose organization and dynamics are finely regulated by numerous actin-binding proteins. Papuga et al. (pages 3034–3052) provide evidence that the six members of the Arabidopsis LIM protein family are specialized in the cross-linking of actin filaments in parallel arrays also called actin bundles. Actin bundles are assumed to provide the main tracks for myosin-dependent transport and to stabilize transvacuolar strands of cytoplasm. The cover displays a cortical section in primary root cells expressing a green fluorescent protein-fused WLIM1 protein, showing that WLIM1 decorates a filamentous network of highly bundled actin fibers.