2a54: Difference between revisions
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== | ==fluorescent protein asFP595, A143S, on-state, 1min irradiation== | ||
Proteins that can be reversibly photoswitched between a fluorescent and a | <StructureSection load='2a54' size='340' side='right'caption='[[2a54]], [[Resolution|resolution]] 1.45Å' scene=''> | ||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[2a54]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Anemonia_sulcata Anemonia sulcata]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2A54 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2A54 FirstGlance]. <br> | |||
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.45Å</td></tr> | |||
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=NRQ:{(4Z)-4-(4-HYDROXYBENZYLIDENE)-2-[3-(METHYLTHIO)PROPANIMIDOYL]-5-OXO-4,5-DIHYDRO-1H-IMIDAZOL-1-YL}ACETIC+ACID'>NRQ</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=2a54 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2a54 OCA], [https://pdbe.org/2a54 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2a54 RCSB], [https://www.ebi.ac.uk/pdbsum/2a54 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2a54 ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[https://www.uniprot.org/uniprot/NFCP_ANESU NFCP_ANESU] Pigment protein that is intensely purple in color.<ref>PMID:10852900</ref> | |||
== Evolutionary Conservation == | |||
[[Image:Consurf_key_small.gif|200px|right]] | |||
Check<jmol> | |||
<jmolCheckbox> | |||
<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/a5/2a54_consurf.spt"</scriptWhenChecked> | |||
<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | |||
<text>to colour the structure by Evolutionary Conservation</text> | |||
</jmolCheckbox> | |||
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=2a54 ConSurf]. | |||
<div style="clear:both"></div> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
Proteins that can be reversibly photoswitched between a fluorescent and a nonfluorescent state bear enormous potential in diverse fields, such as data storage, in vivo protein tracking, and subdiffraction resolution light microscopy. However, these proteins could hitherto not live up to their full potential because the molecular switching mechanism is not resolved. Here, we clarify the molecular photoswitching mechanism of asFP595, a green fluorescent protein (GFP)-like protein that can be transferred from a nonfluorescent "off" to a fluorescent "on" state and back again, by green and blue light, respectively. To this end, we establish reversible photoswitching of fluorescence in whole protein crystals and show that the switching kinetics in the crystal is identical with that in solution. Subsequent x-ray analysis demonstrated that upon the absorption of a green photon, the chromophore isomerizes from a trans (off) to a cis (on) state. Molecular dynamics calculations suggest that isomerization occurs through a bottom hula twist mechanism with concomitant rotation of both bonds of the chromophoric methine ring bridge. This insight into the switching mechanism should facilitate the targeted design of photoswitchable proteins. Reversible photoswitching of the protein chromophore system within intact crystals also constitutes a step toward the use of fluorescent proteins in three-dimensional data recording. | |||
Structure and mechanism of the reversible photoswitch of a fluorescent protein.,Andresen M, Wahl MC, Stiel AC, Grater F, Schafer LV, Trowitzsch S, Weber G, Eggeling C, Grubmuller H, Hell SW, Jakobs S Proc Natl Acad Sci U S A. 2005 Sep 13;102(37):13070-4. Epub 2005 Aug 31. PMID:16135569<ref>PMID:16135569</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 2a54" style="background-color:#fffaf0;"></div> | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Anemonia sulcata]] | [[Category: Anemonia sulcata]] | ||
[[Category: | [[Category: Large Structures]] | ||
[[Category: Andresen | [[Category: Andresen M]] | ||
[[Category: Eggeling | [[Category: Eggeling C]] | ||
[[Category: Graeter | [[Category: Graeter F]] | ||
[[Category: Grubmueller | [[Category: Grubmueller H]] | ||
[[Category: Hell | [[Category: Hell SW]] | ||
[[Category: Jakobs | [[Category: Jakobs S]] | ||
[[Category: Schaefer | [[Category: Schaefer L]] | ||
[[Category: Stiel | [[Category: Stiel AC]] | ||
[[Category: Trowitzsch | [[Category: Trowitzsch S]] | ||
[[Category: Wahl | [[Category: Wahl MC]] | ||
[[Category: Weber | [[Category: Weber G]] | ||
Latest revision as of 11:15, 15 May 2024
fluorescent protein asFP595, A143S, on-state, 1min irradiationfluorescent protein asFP595, A143S, on-state, 1min irradiation
Structural highlights
FunctionNFCP_ANESU Pigment protein that is intensely purple in color.[1] Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedProteins that can be reversibly photoswitched between a fluorescent and a nonfluorescent state bear enormous potential in diverse fields, such as data storage, in vivo protein tracking, and subdiffraction resolution light microscopy. However, these proteins could hitherto not live up to their full potential because the molecular switching mechanism is not resolved. Here, we clarify the molecular photoswitching mechanism of asFP595, a green fluorescent protein (GFP)-like protein that can be transferred from a nonfluorescent "off" to a fluorescent "on" state and back again, by green and blue light, respectively. To this end, we establish reversible photoswitching of fluorescence in whole protein crystals and show that the switching kinetics in the crystal is identical with that in solution. Subsequent x-ray analysis demonstrated that upon the absorption of a green photon, the chromophore isomerizes from a trans (off) to a cis (on) state. Molecular dynamics calculations suggest that isomerization occurs through a bottom hula twist mechanism with concomitant rotation of both bonds of the chromophoric methine ring bridge. This insight into the switching mechanism should facilitate the targeted design of photoswitchable proteins. Reversible photoswitching of the protein chromophore system within intact crystals also constitutes a step toward the use of fluorescent proteins in three-dimensional data recording. Structure and mechanism of the reversible photoswitch of a fluorescent protein.,Andresen M, Wahl MC, Stiel AC, Grater F, Schafer LV, Trowitzsch S, Weber G, Eggeling C, Grubmuller H, Hell SW, Jakobs S Proc Natl Acad Sci U S A. 2005 Sep 13;102(37):13070-4. Epub 2005 Aug 31. PMID:16135569[2] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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