2p1n

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[[Image:2p1n.png|left|200px]]
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==Mechanism of Auxin Perception by the TIR1 Ubiqutin Ligase==
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<StructureSection load='2p1n' size='340' side='right' caption='[[2p1n]], [[Resolution|resolution]] 2.50&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[2p1n]] is a 6 chain structure with sequence from [http://en.wikipedia.org/wiki/Arabidopsis_thaliana Arabidopsis thaliana]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2P1N OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2P1N FirstGlance]. <br>
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</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CFA:(2,4-DICHLOROPHENOXY)ACETIC+ACID'>CFA</scene>, <scene name='pdbligand=IHP:INOSITOL+HEXAKISPHOSPHATE'>IHP</scene><br>
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<tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2p1m|2p1m]], [[2p1o|2p1o]], [[2p1p|2p1p]], [[2p1q|2p1q]]</td></tr>
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<tr><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">SKP1A, ASK1, SKP1, UIP1 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=3702 Arabidopsis thaliana]), TIR1, FBL1, WEI1 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=3702 Arabidopsis thaliana])</td></tr>
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<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=2p1n FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2p1n OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2p1n RCSB], [http://www.ebi.ac.uk/pdbsum/2p1n PDBsum]</span></td></tr>
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<table>
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/p1/2p1n_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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</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/chain_selection.php?pdb_ID=2ata ConSurf].
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<div style="clear:both"></div>
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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Auxin is a pivotal plant hormone that controls many aspects of plant growth and development. Perceived by a small family of F-box proteins including transport inhibitor response 1 (TIR1), auxin regulates gene expression by promoting SCF ubiquitin-ligase-catalysed degradation of the Aux/IAA transcription repressors, but how the TIR1 F-box protein senses and becomes activated by auxin remains unclear. Here we present the crystal structures of the Arabidopsis TIR1-ASK1 complex, free and in complexes with three different auxin compounds and an Aux/IAA substrate peptide. These structures show that the leucine-rich repeat domain of TIR1 contains an unexpected inositol hexakisphosphate co-factor and recognizes auxin and the Aux/IAA polypeptide substrate through a single surface pocket. Anchored to the base of the TIR1 pocket, auxin binds to a partially promiscuous site, which can also accommodate various auxin analogues. Docked on top of auxin, the Aux/IAA substrate peptide occupies the rest of the TIR1 pocket and completely encloses the hormone-binding site. By filling in a hydrophobic cavity at the protein interface, auxin enhances the TIR1-substrate interactions by acting as a 'molecular glue'. Our results establish the first structural model of a plant hormone receptor.
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{{STRUCTURE_2p1n| PDB=2p1n | SCENE= }}
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Mechanism of auxin perception by the TIR1 ubiquitin ligase.,Tan X, Calderon-Villalobos LI, Sharon M, Zheng C, Robinson CV, Estelle M, Zheng N Nature. 2007 Apr 5;446(7136):640-5. PMID:17410169<ref>PMID:17410169</ref>
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===Mechanism of Auxin Perception by the TIR1 Ubiqutin Ligase===
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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</div>
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{{ABSTRACT_PUBMED_17410169}}
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==About this Structure==
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[[2p1n]] is a 6 chain structure with sequence from [http://en.wikipedia.org/wiki/Arabidopsis_thaliana Arabidopsis thaliana]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2P1N OCA].
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==See Also==
==See Also==
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*[[Herbicide 2%2C4-D bound to TIR1 Ubiquitin Ligase|Herbicide 2%2C4-D bound to TIR1 Ubiquitin Ligase]]
*[[Transport inhibitor response 1|Transport inhibitor response 1]]
*[[Transport inhibitor response 1|Transport inhibitor response 1]]
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== References ==
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==Reference==
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<references/>
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<ref group="xtra">PMID:017410169</ref><references group="xtra"/>
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__TOC__
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</StructureSection>
[[Category: Arabidopsis thaliana]]
[[Category: Arabidopsis thaliana]]
[[Category: Calderon-Villalobos, L I.A.]]
[[Category: Calderon-Villalobos, L I.A.]]

Revision as of 09:02, 29 September 2014

Mechanism of Auxin Perception by the TIR1 Ubiqutin Ligase

2p1n, resolution 2.50Å

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