The N-terminal effector domain found in NLRC5. It adopts a six alpha-helix bundle with a general death fold. Structure and sequence analysis of the NLRC5-N indicate that it possesses a fold similar to the one of the death-fold domains; however, it displays significant differences in the number of core alpha-helices and their relative orientation. Hence, it is suggested that NLRC5 belongs to the caspase recruitment domain (CARD) subfamily as an atypical CARD [1].

1: Unusual structural features revealed by the solution NMR structure of the NLRC5 caspase recruitment domain. Gutte PG, Jurt S, Grutter MG, Zerbe O; Biochemistry. 2014;53:3106-3117. PMID:24815518