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[[Image:2anx.gif|left|200px]]


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==crystal structure of bacteriophage P22 lysozyme mutant L87M==
The line below this paragraph, containing "STRUCTURE_2anx", creates the "Structure Box" on the page.
<StructureSection load='2anx' size='340' side='right'caption='[[2anx]], [[Resolution|resolution]] 1.04&Aring;' scene=''>
You may change the PDB parameter (which sets the PDB file loaded into the applet)
== Structural highlights ==
or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
<table><tr><td colspan='2'>[[2anx]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Salmonella_virus_P22 Salmonella virus P22]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2ANX OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2ANX FirstGlance]. <br>
or leave the SCENE parameter empty for the default display.
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.04&#8491;</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=IOD:IODIDE+ION'>IOD</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=SM:SAMARIUM+(III)+ION'>SM</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>
{{STRUCTURE_2anx| PDB=2anx |  SCENE= }}
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2anx FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2anx OCA], [https://pdbe.org/2anx PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2anx RCSB], [https://www.ebi.ac.uk/pdbsum/2anx PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2anx ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/ENLYS_BPP22 ENLYS_BPP22] 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 (By similarity).
== 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/an/2anx_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=2anx ConSurf].
<div style="clear:both"></div>


'''crystal structure of bacteriophage P22 lysozyme mutant L87M'''
==See Also==
 
*[[Lysozyme 3D structures|Lysozyme 3D structures]]
 
__TOC__
==Overview==
</StructureSection>
The X-ray crystal structure of the previously unknown bacteriophage P22 lysozyme, the product of gene 19, has been determined ab initio by direct methods using the program SIR2002. The presence of several partially occupied iodine anions and samarium cations augmented the ability of direct methods to locate all 2268 non-H protein atoms in the asymmetric unit, making this one of the largest structures to date to be determined ab initio. The iodides were introduced from a quick soak, which the crystal survived sufficiently well to diffract to 1.04 angstroms resolution. The complete heavy-atom substructure contributed 6.6% of the total scattering power. The initial determination of the structure assumed that there were two iodide ions in the asymmetric unit, although it was later determined that these sites correspond to partially occupied samarium ions. Tests suggested that it is better to overestimate rather than underestimate the heavy-atom content. While experimental phases from all of the successful tests were of high quality, the best results came from a SAD experiment using the programs SHELXD and SHELXE. Nonetheless, ab initio structure determination by direct methods was found to be a viable alternative to traditional protein crystallographic methods provided that the X-ray data extend to atomic resolution and heavy atoms with sufficient scattering power are present in the crystal.
[[Category: Large Structures]]
 
[[Category: Salmonella virus P22]]
==About this Structure==
[[Category: Matthews BW]]
2ANX is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Enterobacteria_phage_p22 Enterobacteria phage p22]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2ANX OCA].
[[Category: Mooers BH]]
 
==Reference==
Extension to 2268 atoms of direct methods in the ab initio determination of the unknown structure of bacteriophage P22 lysozyme., Mooers BH, Matthews BW, Acta Crystallogr D Biol Crystallogr. 2006 Feb;62(Pt 2):165-76. Epub 2006, Jan 18. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/16421448 16421448]
[[Category: Enterobacteria phage p22]]
[[Category: Lysozyme]]
[[Category: Single protein]]
[[Category: Matthews, B W.]]
[[Category: Mooers, B H.]]
[[Category: Atomic resolution]]
[[Category: Phage lysozyme]]
[[Category: Sm-sad]]
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May  3 19:16:15 2008''

Latest revision as of 12:13, 14 February 2024

crystal structure of bacteriophage P22 lysozyme mutant L87Mcrystal structure of bacteriophage P22 lysozyme mutant L87M

Structural highlights

2anx is a 2 chain structure with sequence from Salmonella virus P22. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:X-ray diffraction, Resolution 1.04Å
Ligands:, , ,
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

ENLYS_BPP22 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 (By similarity).

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

See Also

2anx, resolution 1.04Å

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