Is associated with a DNA binding complex that binds to the G box, a well-characterized cis-acting DNA regulatory element found in plant genes (By similarity). Specific negative regulator of slow-vacuolar (SV) ion channel. Mediates F-actin dynamics possibly through inhibiting ADF1 phosphorylation (PubMed:26345162). Negative regulator of freezing tolerance that modulates cold-responsive C-repeat-binding factors (CBF) DREB1A AND DREB1B proteins stability by facilitating their ubiquitin-mediated degradation when activated by CRPK1-mediated phosophorylation in freezing conditions (PubMed:28344081). Interacts with SERK1 in the cell membrane. Component of the SERK1 signaling complex, composed of KAPP, CDC48A, GRF6 or GRF7, SERK1, SERK2, SERK3/BAK1 and BRI1 (PubMed:15592873). Interacts with TPK1 (PubMed:17764516). Interacts with ADF1 (PubMed:26345162). Binds to CRPK1 at the plasma membrane. Interacts with DREB1A and DREB1B in the nucleus when activated by CRPK1-mediated phosophorylation upon freezing (PubMed:28344081). Interacts with CINV1 (PubMed:25256212). Translocates from the cytosol to the nucleus when phosphorylated by CRPK1 in response to cold stress. By cold. Transphosphorylated by SERK1. Phosphorylated by CRPK1 in response to cold. Increased length of hypocotyls under dark-grown conditions. Altered actin arrays in hypocotyl cells. Enhanced freezing tolerance associated with enhanced cold induction of cold-responsive C-repeat-binding factor (CBF) target genes in the double mutant lacking both GRF6 and GRF8, probably due to the suppression of ubiquitin-mediated degradation DREB1A and DREB1B degradation by the 26S proteasome pathway (PubMed:28344081). Belongs to the 14-3-3 family.