2v27: Difference between revisions
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== | ==Structure of the cold active phenylalanine hydroxylase from Colwellia psychrerythraea 34H== | ||
<StructureSection load='2v27' size='340' side='right'caption='[[2v27]], [[Resolution|resolution]] 1.50Å' scene=''> | |||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[2v27]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Colwellia_psychrerythraea_34H Colwellia psychrerythraea 34H]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2V27 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2V27 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]] 1.5Å</td></tr> | |||
[ | <tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=FE:FE+(III)+ION'>FE</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</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=2v27 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2v27 OCA], [https://pdbe.org/2v27 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2v27 RCSB], [https://www.ebi.ac.uk/pdbsum/2v27 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2v27 ProSAT]</span></td></tr> | ||
[ | </table> | ||
[[ | == Function == | ||
[https://www.uniprot.org/uniprot/Q47XN7_COLP3 Q47XN7_COLP3] | |||
[ | == Evolutionary Conservation == | ||
[[ | [[Image:Consurf_key_small.gif|200px|right]] | ||
[ | Check<jmol> | ||
<jmolCheckbox> | |||
<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/v2/2v27_consurf.spt"</scriptWhenChecked> | |||
<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | |||
<text>to colour the structure by Evolutionary Conservation</text> | |||
</jmolCheckbox> | |||
</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/main_output.php?pdb_ID=2v27 ConSurf]. | |||
[ | <div style="clear:both"></div> | ||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
The characteristic of cold-adapted enzymes, high catalytic efficiency at low temperatures, is often associated with low thermostability and high flexibility. In this context, we analyzed the catalytic properties and solved the crystal structure of phenylalanine hydroxylase from the psychrophilic bacterium Colwellia psychrerythraea 34H (CpPAH). CpPAH displays highest activity with tetrahydrobiopterin (BH(4)) as cofactor and at 25 degrees C (15 degrees C above the optimal growth temperature). Although the enzyme is monomeric with a single L-Phe-binding site, the substrate binds cooperatively. In comparison with PAH from mesophilic bacteria and mammalian organisms, CpPAH shows elevated [S(0.5)](L-Phe) (= 1.1 +/- 0.1 mm) and K(m)(BH(4))(= 0.3 +/- 0.1 mm), as well as high catalytic efficiency at 10 degrees C. However, the half-inactivation and denaturation temperature is only slightly lowered (T(m) approximately 52 degrees C; where T(m) is half-denaturation temperature), in contrast to other cold-adapted enzymes. The crystal structure shows regions of local flexibility close to the highly solvent accessible binding sites for BH(4) (Gly(87)/Phe(88)/Gly(89)) and l-Phe (Tyr(114)-Pro(118)). Normal mode and COREX analysis also detect these and other areas with high flexibility. Greater mobility around the active site and disrupted hydrogen bonding abilities for the cofactor appear to represent cold-adaptive properties that do not markedly affect the thermostability of CpPAH. | |||
Structure of phenylalanine hydroxylase from Colwellia psychrerythraea 34H, a monomeric cold active enzyme with local flexibility around the active site and high overall stability.,Leiros HK, Pey AL, Innselset M, Moe E, Leiros I, Steen IH, Martinez A J Biol Chem. 2007 Jul 27;282(30):21973-86. Epub 2007 May 30. PMID:17537732<ref>PMID:17537732</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 2v27" style="background-color:#fffaf0;"></div> | |||
==See Also== | |||
*[[Hydroxylases 3D structures|Hydroxylases 3D structures]] | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Colwellia psychrerythraea 34H]] | |||
[[Category: Large Structures]] | |||
[[Category: Innselset M]] | |||
[[Category: Leiros H-KS]] | |||
[[Category: Leiros I]] | |||
[[Category: Martinez A]] | |||
[[Category: Moe E]] | |||
[[Category: Pey AL]] | |||
[[Category: Steen IH]] | |||
Latest revision as of 18:02, 13 December 2023
Structure of the cold active phenylalanine hydroxylase from Colwellia psychrerythraea 34HStructure of the cold active phenylalanine hydroxylase from Colwellia psychrerythraea 34H
Structural highlights
FunctionEvolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedThe characteristic of cold-adapted enzymes, high catalytic efficiency at low temperatures, is often associated with low thermostability and high flexibility. In this context, we analyzed the catalytic properties and solved the crystal structure of phenylalanine hydroxylase from the psychrophilic bacterium Colwellia psychrerythraea 34H (CpPAH). CpPAH displays highest activity with tetrahydrobiopterin (BH(4)) as cofactor and at 25 degrees C (15 degrees C above the optimal growth temperature). Although the enzyme is monomeric with a single L-Phe-binding site, the substrate binds cooperatively. In comparison with PAH from mesophilic bacteria and mammalian organisms, CpPAH shows elevated [S(0.5)](L-Phe) (= 1.1 +/- 0.1 mm) and K(m)(BH(4))(= 0.3 +/- 0.1 mm), as well as high catalytic efficiency at 10 degrees C. However, the half-inactivation and denaturation temperature is only slightly lowered (T(m) approximately 52 degrees C; where T(m) is half-denaturation temperature), in contrast to other cold-adapted enzymes. The crystal structure shows regions of local flexibility close to the highly solvent accessible binding sites for BH(4) (Gly(87)/Phe(88)/Gly(89)) and l-Phe (Tyr(114)-Pro(118)). Normal mode and COREX analysis also detect these and other areas with high flexibility. Greater mobility around the active site and disrupted hydrogen bonding abilities for the cofactor appear to represent cold-adaptive properties that do not markedly affect the thermostability of CpPAH. Structure of phenylalanine hydroxylase from Colwellia psychrerythraea 34H, a monomeric cold active enzyme with local flexibility around the active site and high overall stability.,Leiros HK, Pey AL, Innselset M, Moe E, Leiros I, Steen IH, Martinez A J Biol Chem. 2007 Jul 27;282(30):21973-86. Epub 2007 May 30. PMID:17537732[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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