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2ohc

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[[Image:2ohc.jpg|left|200px]]
 
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{{Structure
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==structural and mutational analysis of tRNA-intron splicing endonuclease from Thermoplasma acidophilum DSM1728==
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|PDB= 2ohc |SIZE=350|CAPTION= <scene name='initialview01'>2ohc</scene>, resolution 2.50&Aring;
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<StructureSection load='2ohc' size='340' side='right'caption='[[2ohc]], [[Resolution|resolution]] 2.50&Aring;' scene=''>
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|SITE=
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== Structural highlights ==
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|LIGAND=
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<table><tr><td colspan='2'>[[2ohc]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Thermoplasma_acidophilum_DSM_1728 Thermoplasma acidophilum DSM 1728]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2OHC OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2OHC FirstGlance]. <br>
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|ACTIVITY= <span class='plainlinks'>[http://en.wikipedia.org/wiki/tRNA-intron_endonuclease tRNA-intron endonuclease], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.1.27.9 3.1.27.9] </span>
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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]] 2.5&#8491;</td></tr>
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|GENE= endA ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=2303 Thermoplasma acidophilum])
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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=2ohc FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2ohc OCA], [https://pdbe.org/2ohc PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2ohc RCSB], [https://www.ebi.ac.uk/pdbsum/2ohc PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2ohc ProSAT]</span></td></tr>
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|DOMAIN=
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</table>
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|RELATEDENTRY=[[2ohe|2OHE]]
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== Function ==
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|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2ohc FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2ohc OCA], [http://www.ebi.ac.uk/pdbsum/2ohc PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=2ohc RCSB]</span>
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[https://www.uniprot.org/uniprot/ENDA_THEAC ENDA_THEAC] Endonuclease that removes tRNA introns. Cleaves pre-tRNA at the 5'- and 3'-splice sites to release the intron. The products are an intron and two tRNA half-molecules bearing 2',3' cyclic phosphate and 5'-OH termini. Recognizes a pseudosymmetric substrate in which 2 bulged loops of 3 bases are separated by a stem of 4 bp (By similarity).
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}}
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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/oh/2ohc_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=2ohc ConSurf].
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<div style="clear:both"></div>
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'''structural and mutational analysis of tRNA-intron splicing endonuclease from Thermoplasma acidophilum DSM1728'''
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==See Also==
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*[[Endonuclease 3D structures|Endonuclease 3D structures]]
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__TOC__
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==Overview==
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</StructureSection>
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In archaea, RNA endonucleases that act specifically on RNA with bulge-helix-bulge motifs play the main role in the recognition and excision of introns, while the eukaryal enzymes use a measuring mechanism to determine the positions of the universally positioned splice sites relative to the conserved domain of pre-tRNA. Two crystallographic structures of tRNA intron-splicing endonuclease from Thermoplasma acidophilum DSM 1728 (EndA(Ta)) have been solved to 2.5-A and 2.7-A resolution by molecular replacement, using the 2.7-A resolution data as the initial model and the single-wavelength anomalous-dispersion phasing method using selenomethionine as anomalous signals, respectively. The models show that EndA(Ta) is a homodimer and that it has overall folding similar to that of other archaeal tRNA endonucleases. From structural and mutational analyses of H236A, Y229F, and K265I in vitro, we have demonstrated that they play critical roles in recognizing the splice site and in cleaving the pre-tRNA substrate.
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[[Category: Large Structures]]
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[[Category: Thermoplasma acidophilum DSM 1728]]
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==About this Structure==
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[[Category: Hwang KY]]
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2OHC is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Thermoplasma_acidophilum Thermoplasma acidophilum]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2OHC OCA].
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[[Category: Kim YK]]
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[[Category: Lee WH]]
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==Reference==
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[[Category: Mizutani K]]
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Structural and mutational analysis of tRNA intron-splicing endonuclease from Thermoplasma acidophilum DSM 1728: catalytic mechanism of tRNA intron-splicing endonucleases., Kim YK, Mizutani K, Rhee KH, Nam KH, Lee WH, Lee EH, Kim EE, Park SY, Hwang KY, J Bacteriol. 2007 Nov;189(22):8339-46. Epub 2007 Sep 7. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/17827289 17827289]
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[[Category: Park SY]]
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[[Category: Single protein]]
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[[Category: Rhee KH]]
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[[Category: Thermoplasma acidophilum]]
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[[Category: tRNA-intron endonuclease]]
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[[Category: Hwang, K Y.]]
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[[Category: Kim, Y K.]]
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[[Category: Lee, W H.]]
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[[Category: Mizutani, K.]]
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[[Category: Park, S Y.]]
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[[Category: Rhee, K H.]]
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[[Category: endonuclease]]
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[[Category: hydrolase]]
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[[Category: intron]]
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[[Category: splicing]]
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[[Category: trna]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Mar 31 04:17:51 2008''
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Current revision

structural and mutational analysis of tRNA-intron splicing endonuclease from Thermoplasma acidophilum DSM1728

PDB ID 2ohc

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