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. 2020 Oct 14;30(12):1055–1056. doi: 10.1038/s41422-020-00423-3

Fig. 1. Proposed models for inactivation of human cGAS by the nucleosome.

Fig. 1

a In the cytoplasm, human cGAS (h-cGAS) proteins form dimers to sense cytosolic DNA with three DNA-binding sites (labeled A, B, and C), resulting in the formation of h-cGAS dimer–DNA clusters and h-cGAS–DNA liquid phase condensates, to activate the production of 2′,3′-cGAMP. b In the nucleus, the monomeric h-cGAS can bind NCPs with 1:1 and 2:2 stoichiometries, mediated by DNA-binding sites B and C. Furthermore, a proposed higher-order assembly of the h-cGAS–NCP complex could be indicative of a tighter tethering of h-cGAS by the nucleosomes due to a cooperative binding mechanism.