1cer

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[[Image:1cer.png|left|200px]]
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==DETERMINANTS OF ENZYME THERMOSTABILITY OBSERVED IN THE MOLECULAR STRUCTURE OF THERMUS AQUATICUS D-GLYCERALDEHYDE-3-PHOSPHATE DEHYDROGENASE AT 2.5 ANGSTROMS RESOLUTION==
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<StructureSection load='1cer' size='340' side='right' caption='[[1cer]], [[Resolution|resolution]] 2.50&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[1cer]] is a 8 chain structure with sequence from [http://en.wikipedia.org/wiki/Thermus_aquaticus Thermus aquaticus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1CER OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1CER FirstGlance]. <br>
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</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=NAD:NICOTINAMIDE-ADENINE-DINUCLEOTIDE'>NAD</scene><br>
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<tr><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">THERMUS AQUATICUS GAPDH ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=271 Thermus aquaticus])</td></tr>
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<tr><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Glyceraldehyde-3-phosphate_dehydrogenase_(phosphorylating) Glyceraldehyde-3-phosphate dehydrogenase (phosphorylating)], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.2.1.12 1.2.1.12] </span></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=1cer FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1cer OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1cer RCSB], [http://www.ebi.ac.uk/pdbsum/1cer 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/ce/1cer_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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The crystal structure of holo D-glyceraldehyde-3-phosphate dehydrogenase (GAPDH) from the extreme thermophile Thermus aquaticus has been solved at 2.5 Angstroms resolution. To study the determinants of thermostability, we compare our structure to four other GAPDHs. Salt links, hydrogen bonds, buried surface area, packing density, surface to volume ratio, and stabilization of alpha-helices and beta-turns are analyzed. We find a strong correlation between thermostability and the number of hydrogen bonds between charged side chains and neutral partners. These charged-neutral hydrogen bonds provide electrostatic stabilization without the heavy desolvation penalty of salt links. The stability of thermophilic GAPDHs is also correlated with the number of intrasubunit salt links and total hydrogen bonds. Charged residues, therefore, play a dual role in stabilization by participating not only in salt links but also in hydrogen bonds with a neutral partner. Hydrophobic effects allow for discrimination between thermophiles and psychrophiles, but not within the GAPDH thermophiles. There is, however, an association between thermostability and decreasing enzyme surface to volume ratio. Finally, we describe several interactions present in both our GAPDH and a hyperthermophilic GAPDH that are absent in the less thermostable GAPDHs. These include a four-residue salt link network, a hydrogen bond near the active site, an intersubunit salt link, and several buried Ile residues.
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{{STRUCTURE_1cer| PDB=1cer | SCENE= }}
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Determinants of enzyme thermostability observed in the molecular structure of Thermus aquaticus D-glyceraldehyde-3-phosphate dehydrogenase at 25 Angstroms Resolution.,Tanner JJ, Hecht RM, Krause KL Biochemistry. 1996 Feb 27;35(8):2597-609. PMID:8611563<ref>PMID:8611563</ref>
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===DETERMINANTS OF ENZYME THERMOSTABILITY OBSERVED IN THE MOLECULAR STRUCTURE OF THERMUS AQUATICUS D-GLYCERALDEHYDE-3-PHOSPHATE DEHYDROGENASE AT 2.5 ANGSTROMS RESOLUTION===
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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_8611563}}
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==About this Structure==
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[[1cer]] is a 8 chain structure with sequence from [http://en.wikipedia.org/wiki/Thermus_aquaticus Thermus aquaticus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1CER OCA].
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==See Also==
==See Also==
*[[Aldehyde dehydrogenase|Aldehyde dehydrogenase]]
*[[Aldehyde dehydrogenase|Aldehyde dehydrogenase]]
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== References ==
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==Reference==
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<references/>
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<ref group="xtra">PMID:008611563</ref><references group="xtra"/>
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__TOC__
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</StructureSection>
[[Category: Thermus aquaticus]]
[[Category: Thermus aquaticus]]
[[Category: Hecht, R M.]]
[[Category: Hecht, R M.]]

Revision as of 16:53, 20 August 2014

DETERMINANTS OF ENZYME THERMOSTABILITY OBSERVED IN THE MOLECULAR STRUCTURE OF THERMUS AQUATICUS D-GLYCERALDEHYDE-3-PHOSPHATE DEHYDROGENASE AT 2.5 ANGSTROMS RESOLUTION

1cer, resolution 2.50Å

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