Required for some glucose-regulated gene expression, being a physical connection between RGS1 and HXK1 in sugar signaling. Prevents roots and inflorecences growth. Interacts with RGS1 and HXK1. Expressed constitutively. Long roots in young seedlings and large inflorescences in adult plants. Arrested seedling development in response to glucose. Proposed as a reliable reference gene for normalization purposes.