5cfl

Crystal structure of anemone STING (Nematostella vectensis) in complex with 3', 3' c-di-GMP, c[G(3', 5')pG(3', 5')p]Crystal structure of anemone STING (Nematostella vectensis) in complex with 3', 3' c-di-GMP, c[G(3', 5')pG(3', 5')p]

Structural highlights

5cfl is a 2 chain structure with sequence from Nematostella vectensis. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:	X-ray diffraction, Resolution 1.836Å
Ligands:	,
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

STING_NEMVE Sensor of cytosolic DNA from bacteria and viruses that promotes autophagy (PubMed:30842662). Acts by recognizing and binding cyclic GMP-AMP (cGAMP), a messenger produced by CGAS in response to DNA in the cytosol (PubMed:26300263, PubMed:30842662). Following cGAMP-binding, promotes the formation of autophagosomes, leading to target cytosolic DNA for degradation by the lysosome (PubMed:30842662). Exhibits guanine base-specific ligand recognition. Binds 3'-3'linked cGAMP, 2'-3' linked cGAMP and 3'-3' linked c-di-GMP with much greater affinity as compared to 3'-3' linked c-di-AMP (PubMed:26300263). Lacks the C-terminal tail (CTT) found in mammalian orthologs which is essential for interferon signaling (PubMed:26300263).^[1] ^[2]

References

↑ Kranzusch PJ, Wilson SC, Lee AS, Berger JM, Doudna JA, Vance RE. Ancient Origin of cGAS-STING Reveals Mechanism of Universal 2',3' cGAMP Signaling. Mol Cell. 2015 Aug 19. pii: S1097-2765(15)00580-8. doi:, 10.1016/j.molcel.2015.07.022. PMID:26300263 doi:http://dx.doi.org/10.1016/j.molcel.2015.07.022
↑ Gui X, Yang H, Li T, Tan X, Shi P, Li M, Du F, Chen ZJ. Autophagy induction via STING trafficking is a primordial function of the cGAS pathway. Nature. 2019 Mar;567(7747):262-266. PMID:30842662 doi:10.1038/s41586-019-1006-9

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OCA

[1] Kranzusch PJ, Wilson SC, Lee AS, Berger JM, Doudna JA, Vance RE. Ancient Origin of cGAS-STING Reveals Mechanism of Universal 2',3' cGAMP Signaling. Mol Cell. 2015 Aug 19. pii: S1097-2765(15)00580-8. doi:, 10.1016/j.molcel.2015.07.022. PMID:26300263 doi:http://dx.doi.org/10.1016/j.molcel.2015.07.022

[2] Gui X, Yang H, Li T, Tan X, Shi P, Li M, Du F, Chen ZJ. Autophagy induction via STING trafficking is a primordial function of the cGAS pathway. Nature. 2019 Mar;567(7747):262-266. PMID:30842662 doi:10.1038/s41586-019-1006-9

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