This is the N-terminal domain found in dicer proteins from Giardia intestinalis. The N-terminal region (i.e. the platform domain) forms a flat surface composed of antiparallel beta sheet and three alpha helices. This surface contains a large positively charged region that could interact directly with the negatively charged phosphodiester backbone of the modeled dsRNA helix.
Jiyao W et al.(2023). "The conserved domain database in 2023.",