Adapter-like transcriptional repressor recruiting TPL/TPR corepressors to inhibit TCP transcription factors (By similarity). May be involved in leaf development. Homodimer and heterodimer with SPL and SPEARs (PubMed:25527103). Interacts with SPL, SPEAR1, SPEAR3 and SPEAR4 (PubMed:25527103). Expressed in leaves. Knock down expression of SPEAR2/TIE4 and SPEAR4/TIE3 by RNAi in a SPEAR3/TIE1 null mutant produces lines displaying epinastic leaves.