3ve3: Difference between revisions

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'''Unreleased structure'''
==Structure of ICT Intermediate from time-resolved laue crystallography==
<StructureSection load='3ve3' size='340' side='right' caption='[[3ve3]], [[Resolution|resolution]] 1.60&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[3ve3]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Dsm_244 Dsm 244]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3VE3 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3VE3 FirstGlance]. <br>
</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=HC4:4-HYDROXYCINNAMIC+ACID'>HC4</scene><br>
<tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3ve4|3ve4]], [[4hy8|4hy8]], [[4i38|4i38]], [[4i39|4i39]], [[4i3a|4i3a]], [[4i3i|4i3i]], [[4i3j|4i3j]]</td></tr>
<tr><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">pyp ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1053 DSM 244])</td></tr>
<tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3ve3 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3ve3 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3ve3 RCSB], [http://www.ebi.ac.uk/pdbsum/3ve3 PDBsum]</span></td></tr>
<table>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Trans-to-cis isomerization, the key reaction in photoactive proteins, usually cannot occur through the standard one-bond-flip mechanism. Owing to spatial constraints imposed by a protein environment, isomerization probably proceeds through a volume-conserving mechanism in which highly choreographed atomic motions are expected, the details of which have not yet been observed directly. Here we employ time-resolved X-ray crystallography to visualize structurally the isomerization of the p-coumaric acid chromophore in photoactive yellow protein with a time resolution of 100 ps and a spatial resolution of 1.6 A. The structure of the earliest intermediate (I(T)) resembles a highly strained transition state in which the torsion angle is located halfway between the trans- and cis-isomers. The reaction trajectory of I(T) bifurcates into two structurally distinct cis intermediates via hula-twist and bicycle-pedal pathways. The bifurcating reaction pathways can be controlled by weakening the hydrogen bond between the chromophore and an adjacent residue through E46Q mutation, which switches off the bicycle-pedal pathway.


The entry 3ve3 is ON HOLD  until Paper Publication
Volume-conserving trans-cis isomerization pathways in photoactive yellow protein visualized by picosecond X-ray crystallography.,Jung YO, Lee JH, Kim J, Schmidt M, Moffat K, Srajer V, Ihee H Nat Chem. 2013 Mar;5(3):212-20. doi: 10.1038/nchem.1565. Epub 2013 Feb 3. PMID:23422563<ref>PMID:23422563</ref>


Authors: Ihee, H., Jung, Y.O.
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 
</div>
Description: Structure of ICT Intermediate from time-resolved laue crystallography
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Dsm 244]]
[[Category: Ihee, H.]]
[[Category: Jung, Y O.]]
[[Category: Chromophore]]
[[Category: Luminescent protein]]
[[Category: Photoreceptor]]
[[Category: Sensory transduction]]
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