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== | ==STRUCTURE OF HYDROLASE (SERINE PROTEINASE)== | ||
The solvent structure in orthorhombic crystals of bovine trypsin has been | <StructureSection load='5ptp' size='340' side='right'caption='[[5ptp]], [[Resolution|resolution]] 1.34Å' scene=''> | ||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[5ptp]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Bos_taurus Bos taurus]. This structure supersedes the now removed PDB entries [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=4ptp 4ptp], [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=3ptp 3ptp], [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=2ptp 2ptp] and [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=1ptp 1ptp]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=5PTP OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=5PTP FirstGlance]. <br> | |||
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene></td></tr> | |||
<tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=MIS:MONOISOPROPYLPHOSPHORYLSERINE'>MIS</scene></td></tr> | |||
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Trypsin Trypsin], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.4.21.4 3.4.21.4] </span></td></tr> | |||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=5ptp FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5ptp OCA], [http://pdbe.org/5ptp PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=5ptp RCSB], [http://www.ebi.ac.uk/pdbsum/5ptp PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=5ptp ProSAT]</span></td></tr> | |||
</table> | |||
== 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/pt/5ptp_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=5ptp ConSurf]. | |||
<div style="clear:both"></div> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
The solvent structure in orthorhombic crystals of bovine trypsin has been independently determined by X-ray diffraction to 1.35 A resolution and by neutron diffraction to 2.1 A resolution. A consensus model of the water molecule positions was obtained using oxygen positions identified in the electron density map determined by X-ray diffraction, which were verified by comparison to D2O-H2O difference neutron scattering density. Six of 184 water molecules in the X-ray structure, all with B-factors greater than 50 A2, were found to be spurious after comparison with neutron results. Roughly two-thirds of the water of hydration expected from thermodynamic data for proteins was localized by neutron diffraction; approximately one-half of the water of hydration was located by X-ray diffraction. Polar regions of the protein are well hydrated, and significant D2O-H2O difference density is seen for a small number of water molecules in a second shell of hydration. Hydrogen bond lengths and angles calculated from unconstrained refinement of water positions are distributed about values typically seen in small molecule structures. Solvent models found in seven other bovine trypsin and trypsinogen and rat trypsin structures determined by X-ray diffraction were compared. Internal water molecules are well conserved in all trypsin structures including anionic rat trypsin, which is 65% homologous to bovine trypsin. Of the 22 conserved waters in trypsin, 19 were also found in trypsinogen, suggesting that they are located in regions of the apoprotein that are structurally conserved in the transition to the mature protein. Seven waters were displaced upon activation of trypsinogen. Water structure at crystal contacts is not generally conserved in different crystal forms. Three groups of integral structural water molecules are highly conserved in all solvent structures, including a spline of water molecules inserted between two beta-strands, which may resemble an intermediate in the formation of beta sheets during the folding of a protein. | |||
Solvent structure in crystals of trypsin determined by X-ray and neutron diffraction.,Finer-Moore JS, Kossiakoff AA, Hurley JH, Earnest T, Stroud RM Proteins. 1992 Mar;12(3):203-22. PMID:1557349<ref>PMID:1557349</ref> | |||
== | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
</div> | |||
<div class="pdbe-citations 5ptp" style="background-color:#fffaf0;"></div> | |||
==See Also== | |||
*[[Bromodomain-containing protein 3D structures|Bromodomain-containing protein 3D structures]] | |||
*[[Trypsin 3D structures|Trypsin 3D structures]] | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Bos taurus]] | [[Category: Bos taurus]] | ||
[[Category: | [[Category: Large Structures]] | ||
[[Category: Trypsin]] | [[Category: Trypsin]] | ||
[[Category: Finer-Moore, J | [[Category: Finer-Moore, J]] | ||
[[Category: Stroud, R | [[Category: Stroud, R M]] | ||
[[Category: | [[Category: Digestion]] | ||
[[Category: | [[Category: Hydrolase]] | ||
[[Category: | [[Category: Pancrea]] | ||
[[Category: | [[Category: Serine protease]] | ||
[[Category: Zymogen]] | |||
[[Category: | |||
Latest revision as of 10:47, 2 September 2020
STRUCTURE OF HYDROLASE (SERINE PROTEINASE)STRUCTURE OF HYDROLASE (SERINE PROTEINASE)
Structural highlights
Evolutionary 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 solvent structure in orthorhombic crystals of bovine trypsin has been independently determined by X-ray diffraction to 1.35 A resolution and by neutron diffraction to 2.1 A resolution. A consensus model of the water molecule positions was obtained using oxygen positions identified in the electron density map determined by X-ray diffraction, which were verified by comparison to D2O-H2O difference neutron scattering density. Six of 184 water molecules in the X-ray structure, all with B-factors greater than 50 A2, were found to be spurious after comparison with neutron results. Roughly two-thirds of the water of hydration expected from thermodynamic data for proteins was localized by neutron diffraction; approximately one-half of the water of hydration was located by X-ray diffraction. Polar regions of the protein are well hydrated, and significant D2O-H2O difference density is seen for a small number of water molecules in a second shell of hydration. Hydrogen bond lengths and angles calculated from unconstrained refinement of water positions are distributed about values typically seen in small molecule structures. Solvent models found in seven other bovine trypsin and trypsinogen and rat trypsin structures determined by X-ray diffraction were compared. Internal water molecules are well conserved in all trypsin structures including anionic rat trypsin, which is 65% homologous to bovine trypsin. Of the 22 conserved waters in trypsin, 19 were also found in trypsinogen, suggesting that they are located in regions of the apoprotein that are structurally conserved in the transition to the mature protein. Seven waters were displaced upon activation of trypsinogen. Water structure at crystal contacts is not generally conserved in different crystal forms. Three groups of integral structural water molecules are highly conserved in all solvent structures, including a spline of water molecules inserted between two beta-strands, which may resemble an intermediate in the formation of beta sheets during the folding of a protein. Solvent structure in crystals of trypsin determined by X-ray and neutron diffraction.,Finer-Moore JS, Kossiakoff AA, Hurley JH, Earnest T, Stroud RM Proteins. 1992 Mar;12(3):203-22. PMID:1557349[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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