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Crystallization and preliminary X-ray diffraction analysis of the red fluorescent protein eqFP611

Record type: Article

A novel red fluorescent protein, eqFP611, from the sea anemone Entacmaea quadricolor has been cloned in Escherichia coli. With excitation and emission maxima at 559 and 611 nm, this protein shows the most red-shifted emission and the largest Stokes shift of all non-modified proteins in the green fluorescent protein (GFP) family. The protein fluoresces over a wide pH range (4-10) with high quantum yield (0.45). Its photophysical properties make eqFP611 an excellent marker protein for in vivo labeling in eukaryotic systems as was shown by expression in a mammalian cell culture. eqFP611 has been crystallized in space group P6522, with unit-cell parameters a = b = 77.26, c = 329.49 Å. The unit cell contains 12 asymmetric units, with two monomers in each. A molecular-replacement solution has been obtained using the 48.4% homologous red fluorescent protein from Discosoma coral (DsRed).

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Citation

Nienhaus, K., Vallone, B., Renzi, F., Wiedenmann, J. and Nienhaus, G.U. (2003) Crystallization and preliminary X-ray diffraction analysis of the red fluorescent protein eqFP611 Acta Crystallographica Section D: Biological Crystallography, 59, (7), 1253 -1255. (doi:10.1107/S0907444903008837).

More information

Published date: March 2003

Identifiers

Local EPrints ID: 51217
URI: http://eprints.soton.ac.uk/id/eprint/51217
ISSN: 0907-4449
PURE UUID: ebf00e46-28c2-4654-8535-b13c740b50e8
ORCID for J. Wiedenmann: ORCID iD orcid.org/0000-0003-2128-2943

Catalogue record

Date deposited: 12 May 2008
Last modified: 17 Jul 2017 14:48

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Contributors

Author: K. Nienhaus
Author: B. Vallone
Author: F. Renzi
Author: J. Wiedenmann ORCID iD
Author: G.U. Nienhaus

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