Disease resistance (R) protein that specifically recognizes the AVR-Pik effector avirulence protein from M.oryzae. Resistance proteins guard the plant against pathogens that contain an appropriate avirulence protein via an indirect interaction with this avirulence protein. That triggers a defense system including the hypersensitive response, which restricts the pathogen growth. Interacts with AVR-Pik through its N-terminal part containing the HMA-like domain. The HMA-like (RATX1) domain is responsible for the specific recognition of AVR effectors. Belongs to the disease resistance NB-LRR family.