4bpt: Difference between revisions
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== | ==Structural and thermodynamic insight into phenylalanine hydroxylase from the human pathogen Legionella pneumophila== | ||
[[4bpt]] is a 4 chain structure with sequence from [ | <StructureSection load='4bpt' size='340' side='right'caption='[[4bpt]], [[Resolution|resolution]] 2.50Å' scene=''> | ||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[4bpt]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Legionella_pneumophila Legionella pneumophila]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4BPT OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4BPT FirstGlance]. <br> | |||
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.5Å</td></tr> | |||
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=PEG:DI(HYDROXYETHYL)ETHER'>PEG</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=4bpt FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4bpt OCA], [https://pdbe.org/4bpt PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4bpt RCSB], [https://www.ebi.ac.uk/pdbsum/4bpt PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4bpt ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[https://www.uniprot.org/uniprot/Q5ZS72_LEGPH Q5ZS72_LEGPH] | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
Phenylalanine hydroxylase from Legionella pneumophila (lpPAH) has a major functional role in the synthesis of the pigment pyomelanin, which is a potential virulence factor. We present here the crystal structure of lpPAH, which is a dimeric enzyme that shows high thermostability, with a midpoint denaturation temperature of 79 degrees C, and low substrate affinity. The structure revealed a dimerization motif that includes ionic interactions and a hydrophobic core, composed of both beta-structure and a C-terminal region, with the specific residues (P255, P256, Y257 and F258) interacting with the same residues from the adjacent subunit within the dimer. This unique dimerization interface, together with a number of aromatic clusters, appears to contribute to the high thermal stability of lpPAH. The crystal structure also explains the increased aggregation of the enzyme in the presence of salt. Moreover, the low affinity for substrate l-Phe could be explained from three consecutive glycine residues (G181, 182, 183) located at the substrate-binding site. This is the first structure of a dimeric bacterial PAH and provides a framework for interpreting the molecular and kinetic properties of lpPAH and for further investigating the regulation of the enzyme. | |||
Structural and thermodynamic insight into phenylalanine hydroxylase from the human pathogen Legionella pneumophila.,Leiros HK, Flydal MI, Martinez A FEBS Open Bio. 2013 Aug 19;3:370-8. doi: 10.1016/j.fob.2013.08.006. eCollection, 2013. PMID:24251098<ref>PMID:24251098</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 4bpt" style="background-color:#fffaf0;"></div> | |||
==See Also== | |||
*[[Hydroxylases 3D structures|Hydroxylases 3D structures]] | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Large Structures]] | |||
[[Category: Legionella pneumophila]] | [[Category: Legionella pneumophila]] | ||
[[Category: Flydal MI]] | |||
[[Category: Flydal | [[Category: Leiros H-KS]] | ||
[[Category: Leiros | [[Category: Martinez A]] | ||
[[Category: Martinez | |||