A naturally monomeric infrared fluorescent protein for protein labeling in vivo.

Yu, Dan; Baird, Michelle A; Allen, John R; Howe, Elizabeth S; Klassen, Matthew P; Reade, Anna; Makhijani, Kalpana; Song, Yuanquan et al. · Nat Methods · 2015

basic_science · Level V

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Abstract

Infrared fluorescent proteins (IFPs) provide an additional color to GFP and its homologs in protein labeling. Drawing on structural analysis of the dimer interface, we identified a bacteriophytochrome in the sequence database that is monomeric in truncated form and engineered it into a naturally monomeric IFP (mIFP). We demonstrate that mIFP correctly labels proteins in live cells, Drosophila and zebrafish. It should be useful in molecular, cell and developmental biology.

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