InterPro domain: IPR040361

This family consist of protein TAPETUM DETERMINANT 1 (TPD1) and homologues from plants. TPD1 is required for the specialization of tapetal cells in the Arabidopsis anther [ 1 ]. TPD1 serves as a ligand for the EMS1 receptor kinase to control anther cell differentiation during plant sexual reproduction [ 2 , 3 ].

1. Tapetum determinant1 is required for cell specialization in the Arabidopsis anther. Plant Cell 15, 2792-804
2. Signaling of cell fate determination by the TPD1 small protein and EMS1 receptor kinase. Proc. Natl. Acad. Sci. U.S.A. 105, 2220-5
3. Control of Anther Cell Differentiation by the Small Protein Ligand TPD1 and Its Receptor EMS1 in Arabidopsis. PLoS Genet. 12, e1006147