1ssw

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[[Image:1ssw.gif|left|200px]]
 
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{{Structure
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==Crystal structure of phage T4 lysozyme mutant Y24A/Y25A/T26A/I27A/C54T/C97A==
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|PDB= 1ssw |SIZE=350|CAPTION= <scene name='initialview01'>1ssw</scene>, resolution 2.13&Aring;
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<StructureSection load='1ssw' size='340' side='right'caption='[[1ssw]], [[Resolution|resolution]] 2.13&Aring;' scene=''>
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|SITE=
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== Structural highlights ==
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|LIGAND= <scene name='pdbligand=BME:BETA-MERCAPTOETHANOL'>BME</scene>
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<table><tr><td colspan='2'>[[1ssw]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_virus_T4 Escherichia virus T4]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1SSW OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1SSW FirstGlance]. <br>
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|ACTIVITY= [http://en.wikipedia.org/wiki/Lysozyme Lysozyme], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.2.1.17 3.2.1.17]
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.13&#8491;</td></tr>
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|GENE=
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=BME:BETA-MERCAPTOETHANOL'>BME</scene></td></tr>
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}}
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1ssw FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ssw OCA], [https://pdbe.org/1ssw PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1ssw RCSB], [https://www.ebi.ac.uk/pdbsum/1ssw PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1ssw ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/ENLYS_BPT4 ENLYS_BPT4] Endolysin with lysozyme activity that degrades host peptidoglycans and participates with the holin and spanin proteins in the sequential events which lead to the programmed host cell lysis releasing the mature viral particles. Once the holin has permeabilized the host cell membrane, the endolysin can reach the periplasm and break down the peptidoglycan layer.<ref>PMID:22389108</ref>
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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/ss/1ssw_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/main_output.php?pdb_ID=1ssw ConSurf].
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<div style="clear:both"></div>
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'''Crystal structure of phage T4 lysozyme mutant Y24A/Y25A/T26A/I27A/C54T/C97A'''
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==See Also==
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*[[Lysozyme 3D structures|Lysozyme 3D structures]]
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== References ==
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==Overview==
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<references/>
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In general, alpha-helical conformations in proteins depend in large part on the amino acid residues within the helix and their proximal interactions. For example, an alanine residue has a high propensity to adopt an alpha-helical conformation, whereas that of a glycine residue is low. The sequence preferences for beta-sheet formation are less obvious. To identify the factors that influence beta-sheet conformation, a series of scanning polyalanine mutations were made within the strands and associated turns of the beta-sheet region in T4 lysozyme. For each construct the stability of the folded protein was reduced substantially, consistent with removal of native packing interactions. However, the crystal structures showed that each of the mutants retained the beta-sheet conformation. These results suggest that the structure of the beta-sheet region of T4 lysozyme is maintained to a substantial extent by tertiary interactions with the surrounding parts of the protein. Such tertiary interactions may be important in determining the structures of beta-sheets in general.
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__TOC__
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</StructureSection>
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==About this Structure==
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[[Category: Escherichia virus T4]]
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1SSW is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Bacteriophage_t4 Bacteriophage t4]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1SSW OCA].
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[[Category: Large Structures]]
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[[Category: Baase WA]]
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==Reference==
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[[Category: He MM]]
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Alanine-scanning mutagenesis of the beta-sheet region of phage T4 lysozyme suggests that tertiary context has a dominant effect on beta-sheet formation., He MM, Wood ZA, Baase WA, Xiao H, Matthews BW, Protein Sci. 2004 Oct;13(10):2716-24. Epub 2004 Aug 31. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/15340171 15340171]
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[[Category: Heinz DW]]
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[[Category: Bacteriophage t4]]
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[[Category: Matthews BW]]
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[[Category: Lysozyme]]
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[[Category: Xiao H]]
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[[Category: Single protein]]
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[[Category: Baase, W A.]]
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[[Category: He, M M.]]
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[[Category: Heinz, D W.]]
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[[Category: Matthews, B W.]]
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[[Category: Xiao, H.]]
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[[Category: BME]]
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[[Category: 3d-structure]]
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[[Category: bacteriolytic enzyme]]
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[[Category: glycosidase]]
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[[Category: hydrolase]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 14:09:16 2008''
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Current revision

Crystal structure of phage T4 lysozyme mutant Y24A/Y25A/T26A/I27A/C54T/C97A

PDB ID 1ssw

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