GhTCP12, GhTCP13, and GhTCP18 are functionally redundant in controlling branching in cotton and Arabidopsis ( Diao et al., 2019). AtTCP2, AtTCP3, AtTCP11, and AtTCP15 were found to participate in the regulation of circadian clock by interacting with different components ( Giraud et al., 2010). The expression of a repressor form of AtTCP11 resulted in smaller and curly leaves, shorter petioles, pedicels, and siliques, as well as a higher proportion of abnormal seeds and pollens. The presence of a threonine residue at position 15 of the TCP domain is responsible for the distinct DNA-binding properties of AtTCP11 ( Viola et al., 2011).
