View source for 4doo


==Crystal structure of Arabidopsis thaliana fatty-acid binding protein At3g63170 (AtFAP1)==
<StructureSection load='4doo' size='340' side='right'caption='[[4doo]], [[Resolution|resolution]] 1.90&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[4doo]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Arabidopsis_thaliana Arabidopsis thaliana]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4DOO OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4DOO FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=DAO:LAURIC+ACID'>DAO</scene>, <scene name='pdbligand=K:POTASSIUM+ION'>K</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=4doo FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4doo OCA], [https://pdbe.org/4doo PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4doo RCSB], [https://www.ebi.ac.uk/pdbsum/4doo PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4doo ProSAT]</span></td></tr>
</table>
== Function ==
[[https://www.uniprot.org/uniprot/FAP1_ARATH FAP1_ARATH]] Fatty-acid-binding protein. Interacts preferentially with saturated fatty acid. May be involved in alpha-linolenic (C18:3) metabolism.
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Specialized metabolic enzymes biosynthesize chemicals of ecological importance, often sharing a pedigree with primary metabolic enzymes. However, the lineage of the enzyme chalcone isomerase (CHI) remained unknown. In vascular plants, CHI-catalysed conversion of chalcones to chiral (S)-flavanones is a committed step in the production of plant flavonoids, compounds that contribute to attraction, defence and development. CHI operates near the diffusion limit with stereospecific control. Although associated primarily with plants, the CHI fold occurs in several other eukaryotic lineages and in some bacteria. Here we report crystal structures, ligand-binding properties and in vivo functional characterization of a non-catalytic CHI-fold family from plants. Arabidopsis thaliana contains five actively transcribed genes encoding CHI-fold proteins, three of which additionally encode amino-terminal chloroplast-transit sequences. These three CHI-fold proteins localize to plastids, the site of de novo fatty-acid biosynthesis in plant cells. Furthermore, their expression profiles correlate with those of core fatty-acid biosynthetic enzymes, with maximal expression occurring in seeds and coinciding with increased fatty-acid storage in the developing embryo. In vitro, these proteins are fatty-acid-binding proteins (FAPs). FAP knockout A. thaliana plants show elevated alpha-linolenic acid levels and marked reproductive defects, including aberrant seed formation. Notably, the FAP discovery defines the adaptive evolution of a stereospecific and catalytically 'perfected' enzyme from a non-enzymatic ancestor over a defined period of plant evolution.

Evolution of the chalcone-isomerase fold from fatty-acid binding to stereospecific catalysis.,Ngaki MN, Louie GV, Philippe RN, Manning G, Pojer F, Bowman ME, Li L, Larsen E, Wurtele ES, Noel JP Nature. 2012 May 13;485(7399):530-3. doi: 10.1038/nature11009. PMID:22622584<ref>PMID:22622584</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 4doo" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Arabidopsis thaliana]]
[[Category: Large Structures]]
[[Category: Bowman ME]]
[[Category: Louie GV]]
[[Category: Noel JP]]
[[Category: Pojer F]]