1n3f: Difference between revisions
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== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[1n3f]] is a 12 chain structure with sequence from [http://en.wikipedia.org/wiki/Chlamydomonas_reinhardtii Chlamydomonas reinhardtii]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1N3F OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1N3F FirstGlance]. <br> | <table><tr><td colspan='2'>[[1n3f]] is a 12 chain structure with sequence from [http://en.wikipedia.org/wiki/Chlamydomonas_reinhardtii Chlamydomonas reinhardtii]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1N3F OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1N3F FirstGlance]. <br> | ||
</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>< | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene></td></tr> | ||
<tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1n3e|1n3e]]</td></tr> | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1n3e|1n3e]]</td></tr> | ||
<tr><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">CR.LSU INTRON OF CHOROPLAST 23S RDNA GENE ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=3055 Chlamydomonas reinhardtii])</td></tr> | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">CR.LSU INTRON OF CHOROPLAST 23S RDNA GENE ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=3055 Chlamydomonas reinhardtii])</td></tr> | ||
<tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1n3f FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1n3f OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1n3f RCSB], [http://www.ebi.ac.uk/pdbsum/1n3f PDBsum]</span></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=1n3f FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1n3f OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1n3f RCSB], [http://www.ebi.ac.uk/pdbsum/1n3f PDBsum]</span></td></tr> | ||
<table> | </table> | ||
== Function == | |||
[[http://www.uniprot.org/uniprot/DNE1_CHLRE DNE1_CHLRE]] Endonuclease involved in group I intron homing. Recognizes and cleaves a 19-24 bp palindromic DNA site. | |||
== Evolutionary Conservation == | == Evolutionary Conservation == | ||
[[Image:Consurf_key_small.gif|200px|right]] | [[Image:Consurf_key_small.gif|200px|right]] | ||
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</StructureSection> | </StructureSection> | ||
[[Category: Chlamydomonas reinhardtii]] | [[Category: Chlamydomonas reinhardtii]] | ||
[[Category: Chevalier, B | [[Category: Chevalier, B]] | ||
[[Category: Lemieux, C | [[Category: Lemieux, C]] | ||
[[Category: Monnat, R J | [[Category: Monnat, R J]] | ||
[[Category: Stoddard, B L | [[Category: Stoddard, B L]] | ||
[[Category: Turmel, M | [[Category: Turmel, M]] | ||
[[Category: Dna recognition]] | [[Category: Dna recognition]] | ||
[[Category: Endonuclease]] | [[Category: Endonuclease]] | ||
Revision as of 17:31, 25 December 2014
Crystal structure of I-CreI bound to a palindromic DNA sequence II (palindrome of right side of wildtype DNA target sequence)Crystal structure of I-CreI bound to a palindromic DNA sequence II (palindrome of right side of wildtype DNA target sequence)
Structural highlights
Function[DNE1_CHLRE] Endonuclease involved in group I intron homing. Recognizes and cleaves a 19-24 bp palindromic DNA site. Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedHoming endonucleases are highly specific catalysts of DNA strand breaks that induce the transposition of mobile intervening sequences containing the endonuclease open reading frame. These enzymes recognize long DNA targets while tolerating individual sequence polymorphisms within those sites. Sequences of the homing endonucleases themselves diversify to a great extent after founding intron invasion events, generating highly divergent enzymes that recognize similar target sequences. Here, we visualize the mechanism of flexible DNA recognition and the pattern of structural divergence displayed by two homing endonuclease isoschizomers. We determined structures of I-CreI bound to two DNA target sites that differ at eight of 22 base-pairs, and the structure of an isoschizomer, I-MsoI, bound to a nearly identical DNA target site. This study illustrates several principles governing promiscuous base-pair recognition by DNA-binding proteins, and demonstrates that the isoschizomers display strikingly different protein/DNA contacts. The structures allow us to determine the information content at individual positions in the binding site as a function of the distribution of direct and water-mediated contacts to nucleotide bases, and provide an evolutionary snapshot of endonucleases at an early stage of divergence in their target specificity. Flexible DNA target site recognition by divergent homing endonuclease isoschizomers I-CreI and I-MsoI.,Chevalier B, Turmel M, Lemieux C, Monnat RJ Jr, Stoddard BL J Mol Biol. 2003 May 30;329(2):253-69. PMID:12758074[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences |
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