Genetically encoded calcium indicators for multi-color neural activity imaging and combination with optogenetics.
Akerboom, J., Carreras Calderon, N., Tian, L., Wabnig, S., Prigge, M., Tolo, J., Gordus, A., Orger, M.B., Severi, K.E., Macklin, J.J., Patel, R., Pulver, S.R., Wardill, T.J., Fischer, E., Schuler, C., Chen, T.W., Sarkisyan, K.S., Marvin, J.S., Bargmann, C.I., Kim, D.S., Kugler, S., Lagnado, L., Hegemann, P., Gottschalk, A., Schreiter, E.R., Looger, L.L.(2013) Front Mol Neurosci 6: 2-2
- PubMed: 23459413 
- DOI: 10.3389/fnmol.2013.00002
- Primary Citation of Related Structures:  
3U0K, 3U0L, 3U0M, 3U0N, 4I2Y - PubMed Abstract: 
Genetically encoded calcium indicators (GECIs) are powerful tools for systems neuroscience. Here we describe red, single-wavelength GECIs, "RCaMPs," engineered from circular permutation of the thermostable red fluorescent protein mRuby. High-resolution crystal structures of mRuby, the red sensor RCaMP, and the recently published red GECI R-GECO1 give insight into the chromophore environments of the Ca(2+)-bound state of the sensors and the engineered protein domain interfaces of the different indicators ...