Recombinant Arabidopsis thaliana GRF1-interacting factor 1(GIF1)

Transcription coactivator that plays a role in the regulation of cell expansion in leaf and cotyledons tissues. Component of a network formed by miR396, the GRFs and their interacting factors (GIFs) acting in the regulation of meristem function, at least partially through the control of cell proliferation (PubMed:19392710). Appears to function synergistically with GRF1 as a transcriptional coactivator. Acts together with GRF5 for the development of appropriate leaf size and shape through the promotion and/or maintenance of cell proliferation activity in leaf primordia. Plays a role in adaxial/abaxial patterning and growth in leaf morphogenesis. GIFs are involved in the positive regulation of cell proliferation of lateral organs in a functionally redundant manner. Together with GATA18/HAN, mediates cotyledon identity by preventing ectopic root formation through the repression of PLT1 expression (PubMed:22669825).