1of6

<StructureSection load='1of6' size='340' side='right' caption='[[1of6]], [[Resolution|resolution]] 2.10&Aring;' scene=''>

<table><tr><td colspan='2'>[[1of6]] is a 8 chain structure with sequence from [http://en.wikipedia.org/wiki/Atcc_18824 Atcc 18824]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1OF6 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1OF6 FirstGlance]. <br>

</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=DTY:D-TYROSINE'>DTY</scene>, <scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</scene><br>

<tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1hfb|1hfb]], [[1oab|1oab]], [[1of8|1of8]], [[1ofa|1ofa]], [[1ofb|1ofb]], [[1ofo|1ofo]], [[1ofp|1ofp]], [[1ofq|1ofq]], [[1ofr|1ofr]]</td></tr>

<tr><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/3-deoxy-7-phosphoheptulonate_synthase 3-deoxy-7-phosphoheptulonate synthase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.5.1.54 2.5.1.54] </span></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=1of6 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1of6 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1of6 RCSB], [http://www.ebi.ac.uk/pdbsum/1of6 PDBsum]</span></td></tr>

<table>

<scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/of/1of6_consurf.spt"</scriptWhenChecked>

</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].

<div style="background-color:#fffaf0;">

== Publication Abstract from PubMed ==

The betaalpha barrel is the common protein fold of numerous enzymes and was proposed recently to be the result of gene duplication and fusion of an ancient half-barrel. The initial enzyme of shikimate biosynthesis possesses the additional feature of feedback regulation. The crystal structure and kinetic studies on chimera and mutant proteins of yeast 3-deoxy-d-arabino-heptulosonate-7-phosphate (DAHP) synthase from Saccharomyces cerevisiae inhibited by phenylalanine (Aro3p) and DAHP synthase S. cerevisiae inhibited by tyrosine (Aro4p) give insight into important regions for regulation in the enzyme: The loop, which is connecting the two half-barrels, and structural elements added to the barrel are prerequisites for regulation and form a cavity on the N-terminal side of the betaalpha barrel. In the cavity of Aro4p at position 226 is a glycine residue, which is highly conserved in all other tyrosine-regulated DAHP synthases as well. Sequence alignments with phenylalanine-regulated DAHP synthases including Aro3p show a highly conserved serine residue at this position. An exchange of glycine to serine and vice versa leads to a complete change in the regulation pattern. Therefore the evolution of these differently feedback-inhibited isoenzymes required gene duplication and a single mutation within the internal extra element. Numerous additional amino acid substitutions present in the contemporary isoenzymes are irrelevant for regulation and occurred independently.

Evolution of feedback-inhibited beta /alpha barrel isoenzymes by gene duplication and a single mutation.,Hartmann M, Schneider TR, Pfeil A, Heinrich G, Lipscomb WN, Braus GH Proc Natl Acad Sci U S A. 2003 Feb 4;100(3):862-7. Epub 2003 Jan 22. PMID:12540830<ref>PMID:12540830</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>

</div>

*[[Aldolase|Aldolase]]

[[Category: 3-deoxy-7-phosphoheptulonate synthase]]

[[Category: Atcc 18824]]

[[Category: Braus, G.]]

[[Category: Heinrich, G.]]

[[Category: Koenig, V.]]

[[Category: Pfeil, A.]]

[[Category: Schneider, T R.]]

[[Category: Synthetase]]