Extended PHD finger found in protein Jade-3 and similar proteins
The extended plant homeodomain (ePHD) zinc finger is characterized as Cys2HisCys5HisCys2His. This model includes the ePHD finger of Jade-3. Jade-3, also termed PHD finger protein 16 (PHF16), is a plant homeodomain (PHD) zinc finger protein that is close related to Jade-1, which functions as an essential regulator of multiple cell signaling pathways. Like Jade-1, Jade-3 is required for ING4 and ING5 to associate with histone acetyl transferase (HAT) HBO1 and Eaf6 to form a HBO1 complex that has a histone H4-specific acetyltransferase activity, a reduced activity toward histone H3, and is responsible for the bulk of histone H4 acetylation in vivo. Jade-3 contains a canonical PHD domain followed by this non-canonical ePHD domain, both of which are zinc-binding motifs.
Conserved feature residue pattern:C C H C C C C C H C C H
Evidence:
Comment:based on the structure evidence that human Borjeson-Forssman-Lehmann syndrome-associated protein PHF6 (PDB 4NN2) binds three Zn2+ ions through its ePHD finger
Comment:The extended PHD finger is characterized by Cys2HisCys5HisCys2His.