3lvd: Difference between revisions
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== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[3lvd]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Aequorea_coerulescens Aequorea coerulescens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3LVD OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3LVD FirstGlance]. <br> | <table><tr><td colspan='2'>[[3lvd]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Aequorea_coerulescens Aequorea coerulescens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3LVD OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3LVD FirstGlance]. <br> | ||
</td></tr><tr id=' | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.751Å</td></tr> | ||
<tr id=' | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=GYS:[(4Z)-2-(1-AMINO-2-HYDROXYETHYL)-4-(4-HYDROXYBENZYLIDENE)-5-OXO-4,5-DIHYDRO-1H-IMIDAZOL-1-YL]ACETIC+ACID'>GYS</scene></td></tr> | ||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=3lvd FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3lvd OCA], [https://pdbe.org/3lvd PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3lvd RCSB], [https://www.ebi.ac.uk/pdbsum/3lvd PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3lvd ProSAT]</span></td></tr> | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=3lvd FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3lvd OCA], [https://pdbe.org/3lvd PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3lvd RCSB], [https://www.ebi.ac.uk/pdbsum/3lvd PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3lvd ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Function == | |||
[https://www.uniprot.org/uniprot/Q6YGZ0_9CNID Q6YGZ0_9CNID] | |||
== Evolutionary Conservation == | == Evolutionary Conservation == | ||
[[Image:Consurf_key_small.gif|200px|right]] | [[Image:Consurf_key_small.gif|200px|right]] | ||
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[[Category: Aequorea coerulescens]] | [[Category: Aequorea coerulescens]] | ||
[[Category: Large Structures]] | [[Category: Large Structures]] | ||
[[Category: Pletnev | [[Category: Pletnev SV]] | ||
[[Category: Pletnev | [[Category: Pletnev VZ]] | ||
[[Category: Pletneva | [[Category: Pletneva NV]] | ||
Revision as of 12:02, 15 November 2023
Crystal structure of GFP-like protein aceGFP_G222E (A. coerulescens). UV-photoconverted green form.Crystal structure of GFP-like protein aceGFP_G222E (A. coerulescens). UV-photoconverted green form.
Structural highlights
FunctionEvolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedThe acGFPL is the first-identified member of a novel, colorless and non-fluorescent group of green fluorescent protein (GFP)-like proteins. Its mutant aceGFP, with Gly replacing the invariant catalytic Glu-222, demonstrates a relatively fast maturation rate and bright green fluorescence (lambda(ex) = 480 nm, lambda(em) = 505 nm). The reverse G222E single mutation in aceGFP results in the immature, colorless variant aceGFP-G222E, which undergoes irreversible photoconversion to a green fluorescent state under UV light exposure. Here we present a high resolution crystallographic study of aceGFP and aceGFP-G222E in the immature and UV-photoconverted states. A unique and striking feature of the colorless aceGFP-G222E structure is the chromophore in the trapped intermediate state, where cyclization of the protein backbone has occurred, but Tyr-66 still stays in the native, non-oxidized form, with C(alpha) and C(beta) atoms in the sp(3) hybridization. This experimentally observed immature aceGFP-G222E structure, characterized by the non-coplanar arrangement of the imidazolone and phenolic rings, has been attributed to one of the intermediate states in the GFP chromophore biosynthesis. The UV irradiation (lambda = 250-300 nm) of aceGFP-G222E drives the chromophore maturation further to a green fluorescent state, characterized by the conventional coplanar bicyclic structure with the oxidized double Tyr-66 C(alpha)=C(beta) bond and the conjugated system of pi-electrons. Structure-based site-directed mutagenesis has revealed a critical role of the proximal Tyr-220 in the observed effects. In particular, an alternative reaction pathway via Tyr-220 rather than conventional wild type Glu-222 has been proposed for aceGFP maturation. Structural evidence for a dehydrated intermediate in green fluorescent protein chromophore biosynthesis.,Pletneva NV, Pletnev VZ, Lukyanov KA, Gurskaya NG, Goryacheva EA, Martynov VI, Wlodawer A, Dauter Z, Pletnev S J Biol Chem. 2010 May 21;285(21):15978-84. Epub 2010 Mar 9. PMID:20220148[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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