This family was first named TPM domain after its founding proteins: TLP18.3, Psb32 and MOLO-1. In Arabidopsis, this domain is called the thylakoid acid phosphatase -TAP - domain and has a Rossmann-like fold. In plants, the family resides in the thylakoid lumen attached to the outer membrane of the chloroplast/plastid. It is active in the photosystem II.
Jiyao W et al.(2023). "The conserved domain database in 2023.",