second harmonin_N_like domain (repeat 2) of L-delphilin, and related domains
This subgroup contains the second of two harmonin_N_like domains of an alternatively spliced longer variant of mouse delphilin (L-delphilin), and related domains. Delphilin is a postsynaptic density-95/discs-large/ZO-1 (PDZ) domain-containing scaffold protein which binds the glutamate receptor delta-2 (GRID2) subunit and the monocarboxylate transporter 2 at the cerebellar parallel fiber-Purkinje cell synapses. This harmonin_N_like domain in L-delphilin follows the second PDZ protein-binding domain, PDZ2; it is also found in the shorter C-terminal isoforms (S-delphilin/delphilin alpha and delphilin beta). It is a putative protein-binding module based on its sequence similarity to the N-terminal domain of harmonin. The first harmonin_N_like domain of L-delphilin belongs to a different subgroup and is missing from S-delphilin.
Jiyao W et al.(2023). "The conserved domain database in 2023.",