View source for 2jnq

==Solution Structure of a KlbA Intein Precursor from Methanococcus jannaschii==
<StructureSection load='2jnq' size='340' side='right' caption='[[2jnq]], [[NMR_Ensembles_of_Models | 1 NMR models]]' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[2jnq]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Atcc_43067 Atcc 43067]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2JNQ OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2JNQ FirstGlance]. <br>
</td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2jmz|2jmz]]</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=2jnq FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2jnq OCA], [http://pdbe.org/2jnq PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2jnq RCSB], [http://www.ebi.ac.uk/pdbsum/2jnq PDBsum]</span></td></tr>
</table>
== 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/jn/2jnq_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=2jnq ConSurf].
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== Publication Abstract from PubMed ==
Certain proteins of unicellular organisms are translated as precursor polypeptides containing inteins (intervening proteins), which are domains capable of performing protein splicing. These domains, in conjunction with a single residue following the intein, catalyze their own excision from the surrounding protein (extein) in a multistep reaction involving the cleavage of two intein-extein peptide bonds and the formation of a new peptide bond that ligates the two exteins to yield the mature protein. We report here the solution NMR structure of a 186-residue precursor of the KlbA intein from Methanococcus jannaschii, comprising the intein together with N- and C-extein segments of 7 and 11 residues, respectively. The intein is shown to adopt a single, well-defined globular domain, representing a HINT (Hedgehog/Intein)-type topology. Fourteen beta-strands are arranged in a complex fold that includes four beta-hairpins and an antiparallel beta-ribbon, and there is one alpha-helix, which is packed against the beta-ribbon, and one turn of 3(10)-helix in the loop between the beta-strands 8 and 9. The two extein segments show increased disorder, and form only minimal nonbonding contacts with the intein domain. Structure-based mutation experiments resulted in a proposal for functional roles of individual residues in the intein catalytic mechanism.

NMR structure of a KlbA intein precursor from Methanococcus jannaschii.,Johnson MA, Southworth MW, Herrmann T, Brace L, Perler FB, Wuthrich K Protein Sci. 2007 Jul;16(7):1316-28. PMID:17586768<ref>PMID:17586768</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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<div class="pdbe-citations 2jnq" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Atcc 43067]]
[[Category: Brace, L]]
[[Category: Herrmann, T]]
[[Category: Johnson, M A]]
[[Category: Perler, F B]]
[[Category: Southworth, M W]]
[[Category: Wuthrich, K A]]
[[Category: Protein]]
[[Category: Unknown function]]