View source for 4hj4


==Crystal Structure of Rhodobacter Sphaeroides LOV protein==
<StructureSection load='4hj4' size='340' side='right'caption='[[4hj4]], [[Resolution|resolution]] 2.70&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[4hj4]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Cereibacter_sphaeroides_ATCC_17025 Cereibacter sphaeroides ATCC 17025]. The March 2015 RCSB PDB [https://pdb.rcsb.org/pdb/static.do?p=education_discussion/molecule_of_the_month/index.html Molecule of the Month] feature on ''Phototropin''  by David Goodsell is [https://dx.doi.org/10.2210/rcsb_pdb/mom_2015_3 10.2210/rcsb_pdb/mom_2015_3]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4HJ4 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4HJ4 FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=FMN:FLAVIN+MONONUCLEOTIDE'>FMN</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=4hj4 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4hj4 OCA], [https://pdbe.org/4hj4 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4hj4 RCSB], [https://www.ebi.ac.uk/pdbsum/4hj4 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4hj4 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/M1E1G2_CERS5 M1E1G2_CERS5] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Light-oxygen-voltage (LOV) domains bind a flavin chromophore to serve as blue light sensors in a wide range of eukaryotic and prokaryotic proteins. LOV domains are associated with a variable effector domain or a separate protein signaling partner to execute a wide variety of functions that include regulation of kinases, generation of anti-sigma factor antagonists, and regulation of circadian clocks. Here we present the crystal structure, photocycle kinetics, association properties, and spectroscopic features of a full-length LOV domain protein from Rhodobacter sphaeroides (RsLOV). RsLOV exhibits N- and C-terminal helical extensions that form an unusual helical bundle at its dimer interface with some resemblance to the helical transducer of sensory rhodopsin II. The blue light-induced conformational changes of RsLOV revealed from a comparison of light- and dark-state crystal structures support a shared signaling mechanism of LOV domain proteins that originates with the light-induced formation of a flavin-cysteinyl photoadduct. Adduct formation disrupts hydrogen bonding in the active site and propagates structural changes through the LOV domain core to the N- and C-terminal extensions. Single-residue variants in the active site and dimer interface of RsLOV alter photoadduct lifetimes and induce structural changes that perturb the oligomeric state. Size exclusion chromatography, multiangle light scattering, small-angle X-ray scattering, and cross-linking studies indicate that RsLOV dimerizes in the dark but, upon light excitation, dissociates into monomers. This light-induced switch in oligomeric state may prove to be useful for engineering molecular associations in controlled cellular settings.

Light-Induced Subunit Dissociation by a Light-Oxygen-Voltage Domain Photoreceptor from Rhodobacter sphaeroides.,Conrad KS, Bilwes AM, Crane BR Biochemistry. 2013 Jan 15;52(2):378-91. doi: 10.1021/bi3015373. Epub 2013 Jan 3. PMID:23252338<ref>PMID:23252338</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 4hj4" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Cereibacter sphaeroides ATCC 17025]]
[[Category: Large Structures]]
[[Category: Phototropin]]
[[Category: RCSB PDB Molecule of the Month]]
[[Category: Bilwes AM]]
[[Category: Conrad KS]]
[[Category: Crane BR]]