TY  - JOUR
A1  - Scheib, Ulrike
A1  - Broser, Matthias
A1  - Constantin, Oana M.
A1  - Yang, Shang
A1  - Gao, Shiqiang
A1  - Mukherjee, Shatanik
A1  - Stehfest, Katja
A1  - Nagel, Georg
A1  - Gee, Christine E.
A1  - Hegemann, Peter
T1  - Rhodopsin-cyclases for photocontrol of cGMP/cAMP and 2.3 Å structure of the adenylyl cyclase domain
JF  - Nature Communications
N2  - The cyclic nucleotides cAMP and cGMP are important second messengers that orchestrate fundamental cellular responses. Here, we present the characterization of the rhodopsinguanylyl cyclase from Catenaria anguillulae (CaRhGC), which produces cGMP in response to green light with a light to dark activity ratio > 1000. After light excitation the putative signaling state forms with tau = 31 ms and decays with tau = 570 ms. Mutations (up to 6) within the nucleotide binding site generate rhodopsin-adenylyl cyclases (CaRhACs) of which the double mutated YFP-CaRhAC (E497K/C566D) is the most suitable for rapid cAMP production in neurons. Furthermore, the crystal structure of the ligand-bound AC domain (2.25 angstrom) reveals detailed information about the nucleotide binding mode within this recently discovered class of enzyme rhodopsin. Both YFP-CaRhGC and YFP-CaRhAC are favorable optogenetic tools for non-invasive, cell-selective, and spatio-temporally precise modulation of cAMP/cGMP with light.
KW  - Enzymes
KW  - Molecular biophysics
KW  - Molecular neuroscience
KW  - X-ray crystallography
Y1  - 2018
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-228517
VL  - 9
ER  -