1huy
From Proteopedia
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|PDB= 1huy |SIZE=350|CAPTION= <scene name='initialview01'>1huy</scene>, resolution 2.20Å | |PDB= 1huy |SIZE=350|CAPTION= <scene name='initialview01'>1huy</scene>, resolution 2.20Å | ||
|SITE= | |SITE= | ||
| - | |LIGAND= | + | |LIGAND= <scene name='pdbligand=CRO:[2-(1-AMINO-2-HYDROXY-PROPYL)-4-(4-HYDROXY-BENZYLIDINE)-5-OXO-4,5-DIHYDRO-IMIDAZOL-1-YL]-ACETALDEHYDE'>CRO</scene> |
|ACTIVITY= | |ACTIVITY= | ||
|GENE= GFP ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=6100 Aequorea victoria]) | |GENE= GFP ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=6100 Aequorea victoria]) | ||
| + | |DOMAIN= | ||
| + | |RELATEDENTRY=[[1yfp|1YFP]], [[2yfp|2YFP]], [[1f09|1F09]], [[1f0b|1F0B]] | ||
| + | |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1huy FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1huy OCA], [http://www.ebi.ac.uk/pdbsum/1huy PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1huy RCSB]</span> | ||
}} | }} | ||
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[[Category: chromophore]] | [[Category: chromophore]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar 30 21:10:46 2008'' |
Revision as of 18:10, 30 March 2008
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| , resolution 2.20Å | |||||||
|---|---|---|---|---|---|---|---|
| Ligands: | |||||||
| Gene: | GFP (Aequorea victoria) | ||||||
| Related: | 1YFP, 2YFP, 1F09, 1F0B
| ||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
CRYSTAL STRUCTURE OF CITRINE, AN IMPROVED YELLOW VARIANT OF GREEN FLUORESCENT PROTEIN
Overview
Yellow mutants of the green fluorescent protein (YFP) are crucial constituents of genetically encoded indicators of signal transduction and fusions to monitor protein-protein interactions. However, previous YFPs show excessive pH sensitivity, chloride interference, poor photostability, or poor expression at 37 degrees C. Protein evolution in Escherichia coli has produced a new YFP named Citrine, in which the mutation Q69M confers a much lower pK(a) (5.7) than for previous YFPs, indifference to chloride, twice the photostability of previous YFPs, and much better expression at 37 degrees C and in organelles. The halide resistance is explained by a 2.2-A x-ray crystal structure of Citrine, showing that the methionine side chain fills what was once a large halide-binding cavity adjacent to the chromophore. Insertion of calmodulin within Citrine or fusion of cyan fluorescent protein, calmodulin, a calmodulin-binding peptide and Citrine has generated improved calcium indicators. These chimeras can be targeted to multiple cellular locations and have permitted the first single-cell imaging of free [Ca(2+)] in the Golgi. Citrine is superior to all previous YFPs except when pH or halide sensitivity is desired and is particularly advantageous within genetically encoded fluorescent indicators of physiological signals.
About this Structure
1HUY is a Single protein structure of sequence from Aequorea victoria. Full crystallographic information is available from OCA.
Reference
Reducing the environmental sensitivity of yellow fluorescent protein. Mechanism and applications., Griesbeck O, Baird GS, Campbell RE, Zacharias DA, Tsien RY, J Biol Chem. 2001 Aug 3;276(31):29188-94. Epub 2001 May 31. PMID:11387331
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