1ql0: Difference between revisions

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[[Image:1ql0.png|left|200px]]


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==Sm Endonuclease from Seratia marcenscens at atomic resolution==
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<StructureSection load='1ql0' size='340' side='right'caption='[[1ql0]], [[Resolution|resolution]] 1.10&Aring;' scene=''>
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== Structural highlights ==
or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
<table><tr><td colspan='2'>[[1ql0]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Serratia_marcescens Serratia marcescens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1QL0 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1QL0 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]] 1.1&#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=MG:MAGNESIUM+ION'>MG</scene></td></tr>
{{STRUCTURE_1ql0|  PDB=1ql0  |  SCENE=  }}
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1ql0 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ql0 OCA], [https://pdbe.org/1ql0 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1ql0 RCSB], [https://www.ebi.ac.uk/pdbsum/1ql0 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1ql0 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/NUCA_SERMA NUCA_SERMA] Catalyzes the hydrolysis of both DNA and RNA, double- or single-stranded, at the 3'position of the phosphodiester bond to produce 5'-phosphorylated mono-, di-, tri- and tetranucleotides. DNA is a slightly better substrate than RNA.
== 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/ql/1ql0_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.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=1ql0 ConSurf].
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<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
The three-dimensional crystal structure of Serratia marcescens endonuclease has been refined at 1.1 A resolution to an R factor of 12.9% and an R(free) of 15.6% with the use of anisotropic temperature factors. The model contains 3694 non-H atoms, 715 water molecules, four sulfate ions and two Mg(2+)-binding sites at the active sites of the homodimeric protein. It is shown that the magnesium ion linked to the active-site Asn119 of each monomer is surrounded by five water molecules and shows an octahedral coordination geometry. The temperature factors for the bound Mg(2+) ions in the A and B subunits are 7.08 and 4.60 A(2), respectively, and the average temperature factors for the surrounding water molecules are 12.13 and 10.3 A(2), respectively. In comparison with earlier structures, alternative side-chain conformations are defined for 51 residues of the dimer, including the essential active-site residue Arg57. A plausible mechanism of enzyme function is proposed based on the high-resolution S. marcescens nuclease structure, the functional characteristics of the natural and mutational forms of the enzyme and consideration of its structural analogy with homing endo-nuclease I-PpoI.


===SM ENDONUCLEASE FROM SERATIA MARCENSCENS AT ATOMIC RESOLUTION===
Atomic structure of the Serratia marcescens endonuclease at 1.1 A resolution and the enzyme reaction mechanism.,Shlyapnikov SV, Lunin VV, Perbandt M, Polyakov KM, Lunin VY, Levdikov VM, Betzel C, Mikhailov AM Acta Crystallogr D Biol Crystallogr. 2000 May;56(Pt 5):567-72. PMID:10771425<ref>PMID:10771425</ref>


From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 1ql0" style="background-color:#fffaf0;"></div>


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==See Also==
The line below this paragraph, {{ABSTRACT_PUBMED_10771425}}, adds the Publication Abstract to the page
*[[Endonuclease 3D structures|Endonuclease 3D structures]]
(as it appears on PubMed at http://www.pubmed.gov), where 10771425 is the PubMed ID number.
== References ==
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<references/>
{{ABSTRACT_PUBMED_10771425}}
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</StructureSection>
==About this Structure==
[[Category: Large Structures]]
1QL0 is a 2 chains structure of sequences from [http://en.wikipedia.org/wiki/Serratia_marcescens Serratia marcescens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1QL0 OCA].
 
==Reference==
<ref group="xtra">PMID:10771425</ref><references group="xtra"/>
[[Category: Serratia marcescens]]
[[Category: Serratia marcescens]]
[[Category: Serratia marcescens nuclease]]
[[Category: Betzel CH]]
[[Category: Betzel, C H.]]
[[Category: Mikhailov AM]]
[[Category: Mikhailov, A M.]]
[[Category: Perbandt M]]
[[Category: Perbandt, M.]]
[[Category: Endonuclease]]
[[Category: Hydrolase]]
[[Category: Magnesium]]
[[Category: Nuclease]]
[[Category: Signal]]
 
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