Cyclic dinucleotides bind the C-linker of HCN4 to control channel cAMP responsiveness.
Lolicato, M., Bucchi, A., Arrigoni, C., Zucca, S., Nardini, M., Schroeder, I., Simmons, K., Aquila, M., DiFrancesco, D., Bolognesi, M., Schwede, F., Kashin, D., Fishwick, C.W., Johnson, A.P., Thiel, G., Moroni, A.(2014) Nat Chem Biol 10: 457-462
- PubMed: 24776929 
- DOI: 10.1038/nchembio.1521
- Primary Citation of Related Structures:  
4KL1 - PubMed Abstract: 
cAMP mediates autonomic regulation of heart rate by means of hyperpolarization-activated cyclic nucleotide-gated (HCN) channels, which underlie the pacemaker current If. cAMP binding to the C-terminal cyclic nucleotide binding domain enhances HCN open probability through a conformational change that reaches the pore via the C-linker ...