4emu is a 2 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
STING (stimulator of interferon genes) is an innate immune sensor of cyclic dinucleotides that regulates the induction of type I interferons. STING's C-terminal domain forms a V-shaped dimer and binds a cyclic diguanylate monophosphate (c-di-GMP) at the dimer interface by both direct and solvent-mediated hydrogen bonds. Guanines of c-di-GMP stack against the phenolic rings of a conserved tyrosine, and mutations at the c-di-GMP binding surface reduce nucleotide binding and affect signaling.
Structure of STING bound to cyclic di-GMP reveals the mechanism of cyclic dinucleotide recognition by the immune system.,Shu C, Yi G, Watts T, Kao CC, Li P Nat Struct Mol Biol. 2012 Jun 24;19(7):722-4. doi: 10.1038/nsmb.2331. PMID:22728658[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
↑ Shu C, Yi G, Watts T, Kao CC, Li P. Structure of STING bound to cyclic di-GMP reveals the mechanism of cyclic dinucleotide recognition by the immune system. Nat Struct Mol Biol. 2012 Jun 24;19(7):722-4. doi: 10.1038/nsmb.2331. PMID:22728658 doi:10.1038/nsmb.2331
