Binds to RNA (PubMed:17965274). Possible transcription factor that regulates genes involved in development. Mutations in KN-1 alter leaf development. Foci of cells along the lateral vein do not differentiate properly but continue to divide, forming knots. May participate in the switch from indeterminate to determinate cell fates. Probably binds to the DNA sequence 5'-TGAC-3'. Forms homodimers (By similarity). Binds to MBP2C; this interaction reduces RNA binding capacity (PubMed:17965274). Dynamic localization via a plasmodesmata-mediated cell-to-cell transport. This shuttle is repressed by MBP2C binding in cytosolic punctae, at microtubules. Expressed in apical meristems of vegetative and floral stems as well as in the underlying ground meristem. Specifically expressed in vascular bundles developing both in the leaf and stem. Very low levels of expression in leaves. Expressed throughout apical and vegetative meristem during development. Down-regulated as leaves and floral organs are initiated. Belongs to the TALE/KNOX homeobox family.