5jva | pdb_00005jva

1.95 angstrom crystal structure of TAGRFP-T

spinqualitylabelsall models 5jva, resolution 1.95Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 5jva is a 4 chain structure with sequence from Synthetic construct. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.95Å Ligands: BME, NRQ, SO4 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed The red fluorescent protein variant TagRFP-T has greatly improved photostability over its parent molecule, TagRFP, but the underlying mechanism leading to this improvement is to date unknown. The 1.95 A resolution crystallographic structure of TagRFP-T showed that its chromophore exists as a mixture of cis and trans coplanar isomers in roughly equal proportions. Interestingly, both isomers are able to fluoresce, a property that has never been observed in any other fluorescent protein. We propose a "circular restoration model" for TagRFP-T to explain its superior photostability: There are four co-existing chromophore states (cis/trans protonated/ionized state) that can be driven by light to transform from one state into another. This model also explains how TagRPF-T essentially eliminates the temporary dark state (reversible photobleaching). The crystal structure of red fluorescent protein TagRFP-T reveals the mechanism of its superior photostability.,Liu R, Liang QN, Du SQ, Hu XJ, Ding Y Biochem Biophys Res Commun. 2016 Aug 19;477(2):229-34. doi:, 10.1016/j.bbrc.2016.06.047. Epub 2016 Jun 11. PMID:27297107 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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