C-terminal region of the VMAP protein of the classical ternary system (vWA-MoxR-VMAP) in NTP-dependent conflict systems. Mixed alpha+beta domain with no apparent structural similarity to known protein folds. Contains several, nearly universally polar residues, suggesting a conserved interaction interface. Enzymatic function for VMAP-C though possible appears unlikely. Sensing of invasive elements by VMAP-Ms are predicted to trigger a sequence of conformational changes, which is communicated to the switch-component (MoxR) of the system via the more constant VMAP-C [1].

1: Highly regulated, diversifying NTP-dependent biological conflict systems with implications for the emergence of multicellularity. Kaur G, Burroughs AM, Iyer LM, Aravind L; Elife. 2020; [Epub ahead of print] PMID:32101166