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==Crystal structure of archaeal intron-encoded homing endonuclease I-Tsp061I==
==Crystal structure of archaeal intron-encoded homing endonuclease I-Tsp061I==
<StructureSection load='2dch' size='340' side='right' caption='[[2dch]], [[Resolution|resolution]] 2.06&Aring;' scene=''>
<StructureSection load='2dch' size='340' side='right'caption='[[2dch]], [[Resolution|resolution]] 2.06&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
<table><tr><td colspan='2'>[[2dch]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Thermoproteus Thermoproteus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2DCH OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2DCH FirstGlance]. <br>
<table><tr><td colspan='2'>[[2dch]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Thermoproteus Thermoproteus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2DCH OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2DCH FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.06&#8491;</td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2dch FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2dch OCA], [http://www.rcsb.org/pdb/explore.do?structureId=2dch RCSB], [http://www.ebi.ac.uk/pdbsum/2dch PDBsum]</span></td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2dch FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2dch OCA], [https://pdbe.org/2dch PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2dch RCSB], [https://www.ebi.ac.uk/pdbsum/2dch PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2dch ProSAT]</span></td></tr>
</table>
</table>
== Function ==
[https://www.uniprot.org/uniprot/Q8J309_9CREN Q8J309_9CREN]
== Evolutionary Conservation ==
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
Check<jmol>
   <jmolCheckbox>
   <jmolCheckbox>
     <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/dc/2dch_consurf.spt"</scriptWhenChecked>
     <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/dc/2dch_consurf.spt"</scriptWhenChecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <text>to colour the structure by Evolutionary Conservation</text>
     <text>to colour the structure by Evolutionary Conservation</text>
   </jmolCheckbox>
   </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/chain_selection.php?pdb_ID=2ata ConSurf].
</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=2dch ConSurf].
<div style="clear:both"></div>
<div style="clear:both"></div>
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
A novel LAGLIDADG-type homing endonuclease (HEase), I-Tsp061I, from the hyperthermophilic archaeon Thermoproteus sp. IC-061 16 S rRNA gene (rDNA) intron was characterized with respect to its structure, catalytic properties and thermostability. It was found that I-Tsp061I is a HEase isoschizomer of the previously described I-PogI and exhibits the highest thermostability among the known LAGLIDADG-type HEases. Determination of the crystal structure of I-Tsp061I at 2.1 A resolution using the multiple isomorphous replacement and anomalous scattering method revealed that the overall fold is similar to that of other known LAGLIDADG-type HEases, despite little sequence similarity between I-Tsp061I and those HEases. However, I-Tsp061I contains important cross-domain polar networks, unlike its mesophilic counterparts. Notably, the polar network Tyr6-Asp104-His180-107O-HOH12-104O-Asn177 exists across the two packed alpha-helices containing both the LAGLIDADG catalytic motif and the GxxxG hydrophobic helix bundle motif. Another important structural feature is the salt-bridge network Asp29-Arg31-Glu182 across N and C-terminal domain interface, which appears to contribute to the stability of the domain/domain packing. On the basis of these structural analyses and extensive mutational studies, we conclude that such cross-domain polar networks play key roles in stabilizing the catalytic center and domain packing, and underlie the hyperthermostability of I-Tsp061I.
Structure of a hyperthermophilic archaeal homing endonuclease, I-Tsp061I: contribution of cross-domain polar networks to thermostability.,Nakayama H, Shimamura T, Imagawa T, Shirai N, Itoh T, Sako Y, Miyano M, Sakuraba H, Ohshima T, Nomura N, Tsuge H J Mol Biol. 2007 Jan 12;365(2):362-78. Epub 2006 Sep 29. PMID:17069851<ref>PMID:17069851</ref>
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>


==See Also==
==See Also==
*[[Endonuclease|Endonuclease]]
*[[Endonuclease 3D structures|Endonuclease 3D structures]]
== References ==
<references/>
__TOC__
__TOC__
</StructureSection>
</StructureSection>
[[Category: Large Structures]]
[[Category: Thermoproteus]]
[[Category: Thermoproteus]]
[[Category: Miyano, M]]
[[Category: Miyano M]]
[[Category: Nakayama, H]]
[[Category: Nakayama H]]
[[Category: Nomura, N]]
[[Category: Nomura N]]
[[Category: Sako, Y]]
[[Category: Sako Y]]
[[Category: Shimamura, T]]
[[Category: Shimamura T]]
[[Category: Tsuge, H]]
[[Category: Tsuge H]]
[[Category: Alpha/beta fold]]
[[Category: Hydrolase]]

Latest revision as of 16:47, 13 March 2024

Crystal structure of archaeal intron-encoded homing endonuclease I-Tsp061ICrystal structure of archaeal intron-encoded homing endonuclease I-Tsp061I

Structural highlights

2dch is a 1 chain structure with sequence from Thermoproteus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:X-ray diffraction, Resolution 2.06Å
Ligands:,
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

Q8J309_9CREN

Evolutionary Conservation

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

See Also

2dch, resolution 2.06Å

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OCA
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