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1k28

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[[Image:1k28.jpg|left|200px]]
 
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{{Structure
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==The Structure of the Bacteriophage T4 Cell-Puncturing Device==
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|PDB= 1k28 |SIZE=350|CAPTION= <scene name='initialview01'>1k28</scene>, resolution 2.9&Aring;
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<StructureSection load='1k28' size='340' side='right'caption='[[1k28]], [[Resolution|resolution]] 2.90&Aring;' scene=''>
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|SITE=
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== Structural highlights ==
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|LIGAND= <scene name='pdbligand=K:POTASSIUM+ION'>K</scene> and <scene name='pdbligand=PO4:PHOSPHATE ION'>PO4</scene>
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<table><tr><td colspan='2'>[[1k28]] is a 2 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=1K28 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1K28 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]] 2.9&#8491;</td></tr>
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|GENE= 5 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id= Bacteriophage T4]), 27 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id= Bacteriophage T4])
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=K:POTASSIUM+ION'>K</scene>, <scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</scene>, <scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</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=1k28 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1k28 OCA], [https://pdbe.org/1k28 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1k28 RCSB], [https://www.ebi.ac.uk/pdbsum/1k28 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1k28 ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/NEEDL_BPT4 NEEDL_BPT4] Tail-associated lysozyme of the baseplate hub that is essential for localized hydrolysis of bacterial cell wall necessary for viral DNA injection. The needle-like gp5 protein punctures the outer cell membrane and then digests the peptidoglycan cell wall in the periplasmic space. Involved in the tail assembly.<ref>PMID:12837775</ref> <ref>PMID:21129200</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/k2/1k28_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=1k28 ConSurf].
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<div style="clear:both"></div>
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'''The Structure of the Bacteriophage T4 Cell-Puncturing Device'''
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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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Bacteriophage T4 has a very efficient mechanism for infecting cells. The key component of this process is the baseplate, located at the end of the phage tail, which regulates the interaction of the tail fibres and the DNA ejection machine. A complex of gene product (gp) 5 (63K) and gp27 (44K), the central part of the baseplate, is required to penetrate the outer cell membrane of Escherichia coli and to disrupt the intermembrane peptidoglycan layer, promoting subsequent entry of phage DNA into the host. We present here a crystal structure of the (gp5-gp27)3 321K complex, determined to 2.9 A resolution and fitted into a cryo-electron microscopy map at 17 A resolution of the baseplate-tail tube assembly. The carboxy-terminal domain of gp5 is a triple-stranded beta-helix that forms an equilateral triangular prism, which acts as a membrane-puncturing needle. The middle lysozyme domain of gp5, situated on the periphery of the prism, serves to digest the peptidoglycan layer. The amino-terminal, antiparallel beta-barrel domain of gp5 is inserted into a cylinder formed by three gp27 monomers, which may serve as a channel for DNA ejection.
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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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1K28 is a [[Protein complex]] structure of sequences 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=1K28 OCA].
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[[Category: Large Structures]]
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[[Category: Arisaka F]]
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==Reference==
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[[Category: Chipman PR]]
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Structure of the cell-puncturing device of bacteriophage T4., Kanamaru S, Leiman PG, Kostyuchenko VA, Chipman PR, Mesyanzhinov VV, Arisaka F, Rossmann MG, Nature. 2002 Jan 31;415(6871):553-7. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/11823865 11823865]
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[[Category: Kanamaru S]]
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[[Category: Bacteriophage t4]]
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[[Category: Kostyuchenko VA]]
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[[Category: Lysozyme]]
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[[Category: Leiman PG]]
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[[Category: Protein complex]]
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[[Category: Mesyanzhinov VV]]
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[[Category: Arisaka, F.]]
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[[Category: Rossmann MG]]
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[[Category: Chipman, P R.]]
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[[Category: Kanamaru, S.]]
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[[Category: Kostyuchenko, V A.]]
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[[Category: Leiman, P G.]]
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[[Category: Mesyanzhinov, V V.]]
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[[Category: Rossmann, M G.]]
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[[Category: K]]
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[[Category: PO4]]
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[[Category: gp27-gp5*-gp5c]]
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[[Category: hub]]
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[[Category: ob fold]]
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[[Category: pseudohexamer]]
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[[Category: t4 tail lysozyme]]
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[[Category: triple-stranded beta-helix]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 12:11:32 2008''
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Current revision

The Structure of the Bacteriophage T4 Cell-Puncturing Device

PDB ID 1k28

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