This domain is found at the C-terminal end of Monodehydroascorbate reductase 3 (MDHAR3) from Oryza sativa and similar plant sequences. MDHAR3 transfers an electron directly to its substrate, monodehydroascorbate (MDHA), which binds to its active site pocket. It consists of three domains: an NAD(P)-binding domain, an FAD-binding domain, and a C-terminal domain (this entry) [1]. This domain shows an alpha-beta structure.

1: Structure and catalytic mechanism of monodehydroascorbate reductase, MDHAR, from Oryza sativa L. japonica. Park AK, Kim IS, Do H, Jeon BW, Lee CW, Roh SJ, Shin SC, Park H, Kim YS, Kim YH, Yoon HS, Lee JH, Kim HW; Sci Rep. 2016;6:33903. PMID:27652777