4e04
From Proteopedia
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| - | [[ | + | ==RpBphP2 chromophore-binding domain crystallized by homologue-directed mutagenesis.== |
| + | <StructureSection load='4e04' size='340' side='right' caption='[[4e04]], [[Resolution|resolution]] 1.79Å' scene=''> | ||
| + | == Structural highlights == | ||
| + | <table><tr><td colspan='2'>[[4e04]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Rhodopseudomonas_palustris_cga009 Rhodopseudomonas palustris cga009]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4E04 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4E04 FirstGlance]. <br> | ||
| + | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=LBV:3-[2-[(Z)-[3-(2-CARBOXYETHYL)-5-[(Z)-(4-ETHENYL-3-METHYL-5-OXIDANYLIDENE-PYRROL-2-YLIDENE)METHYL]-4-METHYL-PYRROL-1-IUM-2-YLIDENE]METHYL]-5-[(Z)-[(3E)-3-ETHYLIDENE-4-METHYL-5-OXIDANYLIDENE-PYRROLIDIN-2-YLIDENE]METHYL]-4-METHYL-1H-PYRROL-3-YL]PROPANOIC+ACID'>LBV</scene></td></tr> | ||
| + | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2ool|2ool]]</td></tr> | ||
| + | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">phyB1, phyB2, RPA3015, RPA3016 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=258594 Rhodopseudomonas palustris CGA009])</td></tr> | ||
| + | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4e04 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4e04 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4e04 RCSB], [http://www.ebi.ac.uk/pdbsum/4e04 PDBsum]</span></td></tr> | ||
| + | </table> | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
| + | Bacteriophytochromes (BphPs) are biliverdin IXalpha-containing photoreceptors that photoconvert between red (Pr) and far-red (Pfr) absorbing states. BphPs are one half of a two-component system that transmits a light signal to a histidine kinase domain and then to a gene-response regulator. In Rhodopseudomonas palustris, synthesis of a light-harvesting complex (LH4) is controlled by two BphPs (RpBphP2 and RpBphP3). Despite their high sequence identity (52%), their absorption spectra are very different. The spectra of RpBphP2 exhibit classic Pr-to-Pfr photoconversion, whereas RpBphP3 quenches and a high-energy Pnr state emerges [Giraud et al. (2005), J. Biol. Chem. 280, 32389-32397]. Crystallization of the chromophore-binding domain (CBD) of RpBphP2 (RpBphP2-CBD) proved to be difficult and the structure of RpBphP3-CBD was used to crystallize RpBphP2-CBD* using homologue-directed mutagenesis. The structure shows that dimerization is an important factor in successful crystallization of RpBphP2-CBD* and arises from an N136R mutation. Mutations at this site correlate with an ability to dimerize in other truncated BphPs and may also be important for full-length dimer formation. Comparison of the RpBphP3-CBD and RpBphP2-CBD* biliverdin IXalpha pockets revealed that the former has additional hydrogen bonding around the B and D pyrrole rings that may constrain photoconversion to Pfr, resulting in a strained photoexcited Pnr state. | ||
| - | + | Dimerization properties of the RpBphP2 chromophore-binding domain crystallized by homologue-directed mutagenesis.,Bellini D, Papiz MZ Acta Crystallogr D Biol Crystallogr. 2012 Aug;68(Pt 8):1058-66. Epub 2012 Jul 17. PMID:22868772<ref>PMID:22868772</ref> | |
| - | + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |
| - | + | </div> | |
| - | + | == References == | |
| - | + | <references/> | |
| - | == | + | __TOC__ |
| - | + | </StructureSection> | |
[[Category: Rhodopseudomonas palustris cga009]] | [[Category: Rhodopseudomonas palustris cga009]] | ||
| - | [[Category: Bellini, D | + | [[Category: Bellini, D]] |
| - | [[Category: Papiz, M Z | + | [[Category: Papiz, M Z]] |
[[Category: Bacteriophytochrome chromophore binding domain]] | [[Category: Bacteriophytochrome chromophore binding domain]] | ||
[[Category: Phosphorylation]] | [[Category: Phosphorylation]] | ||
Revision as of 13:31, 4 January 2015
RpBphP2 chromophore-binding domain crystallized by homologue-directed mutagenesis.
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