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Stage III sporulation protein AF (Spore_III_AF) This family represents the stage III sporulation protein AF (Spore_III_AF) of the bacterial endospore formation program, which exists in some but not all members of the Firmicutes (formerly called low-GC Gram-positives). These proteins have the typical RBM fold conserved in T3SS/flagellar systems. The RBM fold of SpoIIIAF contains two unique features, extended N-terminal helix, associated with multimerization and an insertion at a loop region that can adopt two distinct conformations. |
Jiyao W et al.(2023). "The conserved domain database in 2023.",