Crystal Structure of the Homing Endonuclease I-CvuI Provides a New Template for Genome Modification
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Crystal Structure of the Homing Endonuclease I-CvuI Provides a New Template for Genome Modification. / Molina, Rafael; Redondo, Pilar; López-Méndez, Blanca; Villate, Maider; Merino, Nekane; Blanco, Francisco J; Valton, Julien; Grizot, Silvestre; Duchateau, Phillipe; Prieto, Jesús; Montoya, Guillermo.
In: The Journal of Biological Chemistry, Vol. 290, No. 48, 27.11.2015, p. 28727-36.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Crystal Structure of the Homing Endonuclease I-CvuI Provides a New Template for Genome Modification
AU - Molina, Rafael
AU - Redondo, Pilar
AU - López-Méndez, Blanca
AU - Villate, Maider
AU - Merino, Nekane
AU - Blanco, Francisco J
AU - Valton, Julien
AU - Grizot, Silvestre
AU - Duchateau, Phillipe
AU - Prieto, Jesús
AU - Montoya, Guillermo
N1 - © 2015 by The American Society for Biochemistry and Molecular Biology, Inc.
PY - 2015/11/27
Y1 - 2015/11/27
N2 - Homing endonucleases recognize and generate a DNA double-strand break, which has been used to promote gene targeting. These enzymes recognize long DNA stretches; they are highly sequence-specific enzymes and display a very low frequency of cleavage even in complete genomes. Although a large number of homing endonucleases have been identified, the landscape of possible target sequences is still very limited to cover the complexity of the whole eukaryotic genome. Therefore, the finding and molecular analysis of homing endonucleases identified but not yet characterized may widen the landscape of possible target sequences. The previous characterization of protein-DNA interaction before the engineering of new homing endonucleases is essential for further enzyme modification. Here we report the crystal structure of I-CvuI in complex with its target DNA and with the target DNA of I-CreI, a homologue enzyme widely used in genome engineering. To characterize the enzyme cleavage mechanism, we have solved the I-CvuI DNA structures in the presence of non-catalytic (Ca(2+)) and catalytic ions (Mg(2+)). We have also analyzed the metal dependence of DNA cleavage using Mg(2+) ions at different concentrations ranging from non-cleavable to cleavable concentrations obtained from in vitro cleavage experiments. The structure of I-CvuI homing endonuclease expands the current repertoire for engineering custom specificities, both by itself as a new scaffold alone and in hybrid constructs with other related homing endonucleases or other DNA-binding protein templates.
AB - Homing endonucleases recognize and generate a DNA double-strand break, which has been used to promote gene targeting. These enzymes recognize long DNA stretches; they are highly sequence-specific enzymes and display a very low frequency of cleavage even in complete genomes. Although a large number of homing endonucleases have been identified, the landscape of possible target sequences is still very limited to cover the complexity of the whole eukaryotic genome. Therefore, the finding and molecular analysis of homing endonucleases identified but not yet characterized may widen the landscape of possible target sequences. The previous characterization of protein-DNA interaction before the engineering of new homing endonucleases is essential for further enzyme modification. Here we report the crystal structure of I-CvuI in complex with its target DNA and with the target DNA of I-CreI, a homologue enzyme widely used in genome engineering. To characterize the enzyme cleavage mechanism, we have solved the I-CvuI DNA structures in the presence of non-catalytic (Ca(2+)) and catalytic ions (Mg(2+)). We have also analyzed the metal dependence of DNA cleavage using Mg(2+) ions at different concentrations ranging from non-cleavable to cleavable concentrations obtained from in vitro cleavage experiments. The structure of I-CvuI homing endonuclease expands the current repertoire for engineering custom specificities, both by itself as a new scaffold alone and in hybrid constructs with other related homing endonucleases or other DNA-binding protein templates.
KW - Chlorella vulgaris
KW - Crystallography, X-Ray
KW - Deoxyribonuclease I
KW - Plant Proteins
KW - Protein Structure, Tertiary
KW - Structure-Activity Relationship
U2 - 10.1074/jbc.M115.678342
DO - 10.1074/jbc.M115.678342
M3 - Journal article
C2 - 26363068
VL - 290
SP - 28727
EP - 28736
JO - Journal of Biological Chemistry
JF - Journal of Biological Chemistry
SN - 0021-9258
IS - 48
ER -
ID: 159214273