User:Karl E. Zahn/Sandbox RB69 1/domain-structure
From Proteopedia
(Domain topology of the apo structure of RB69 DNA polymerase. N-terminal domain appears in blue, exo domain in red, palm in cyan, fingers in magenta, thumb in green.) |
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DNA polymerases (pols) are a specialized class of transferase enzymes that catalyze template directed extension of a primed DNA strand from free deoxynucleoside triphosphates. The family B DNA pol encoded in the genome of the bacteriophage RB69 represents such an enzyme that shares significant homology with the human primase associated pol α, the human replicative pols δ and ε, and the human repair pol ζ. The relative ease with which one can induce RB69 pol to form diffraction quality crystals in complex with DNA, in addition to its homology shared with important human enzymes, has allowed RB69 pol to serve as an extremely useful structural tool and model enzyme. | DNA polymerases (pols) are a specialized class of transferase enzymes that catalyze template directed extension of a primed DNA strand from free deoxynucleoside triphosphates. The family B DNA pol encoded in the genome of the bacteriophage RB69 represents such an enzyme that shares significant homology with the human primase associated pol α, the human replicative pols δ and ε, and the human repair pol ζ. The relative ease with which one can induce RB69 pol to form diffraction quality crystals in complex with DNA, in addition to its homology shared with important human enzymes, has allowed RB69 pol to serve as an extremely useful structural tool and model enzyme. | ||
| - | <applet load='1waj' /> | + | <applet load='1waj' size='300' frame='true' align='right' /> |
| - | The first crystal structure of RB69 pol revealed the domain topology characteristic of polymerases: the palm, fingers, and thumb domains obtain a spatial arrangement reminiscent of a <scene name='User:Karl_E._Zahn/Sandbox_RB69_1/domain-structure/Rthand_1waj/1'>right hand</scene>. RB69 pol also wields intrinsic 3'→5' exonuclease proofreading activity, which drastically improves the fidelity of this enzyme and occurs in most replicative pols. An N-terminal domain precedes the exonuclease domain in primary sequence, bringing the total to <scene name='User:Karl_E._Zahn/Sandbox_RB69_1/domain-structure/Domains_1waj/4'>five domains</scene>. | + | The first crystal structure of RB69 pol revealed the domain topology characteristic of polymerases: the palm, fingers, and thumb domains obtain a spatial arrangement reminiscent of a <scene name='User:Karl_E._Zahn/Sandbox_RB69_1/domain-structure/Rthand_1waj/1'>right hand</scene>. RB69 pol also wields intrinsic 3'→5' exonuclease proofreading activity, which drastically improves the fidelity of this enzyme and occurs in most replicative pols. An N-terminal domain precedes the exonuclease domain in primary sequence, bringing the total to <scene caption='Domain topology of the apo structure of RB69 DNA polymerase. N-terminal domain appears in blue, exo domain in red, palm in cyan, fingers in magenta, thumb in green.' name='User:Karl_E._Zahn/Sandbox_RB69_1/domain-structure/Domains_1waj/4'>five domains</scene>.<ref>PMID:9215631</ref> |
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| - | <ref>PMID:9215631</ref> | + | |
''Use the links below to explore the five domains of RB69 pol!'' | ''Use the links below to explore the five domains of RB69 pol!'' | ||
Revision as of 16:34, 22 April 2009
DNA polymerases (pols) are a specialized class of transferase enzymes that catalyze template directed extension of a primed DNA strand from free deoxynucleoside triphosphates. The family B DNA pol encoded in the genome of the bacteriophage RB69 represents such an enzyme that shares significant homology with the human primase associated pol α, the human replicative pols δ and ε, and the human repair pol ζ. The relative ease with which one can induce RB69 pol to form diffraction quality crystals in complex with DNA, in addition to its homology shared with important human enzymes, has allowed RB69 pol to serve as an extremely useful structural tool and model enzyme.
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The first crystal structure of RB69 pol revealed the domain topology characteristic of polymerases: the palm, fingers, and thumb domains obtain a spatial arrangement reminiscent of a . RB69 pol also wields intrinsic 3'→5' exonuclease proofreading activity, which drastically improves the fidelity of this enzyme and occurs in most replicative pols. An N-terminal domain precedes the exonuclease domain in primary sequence, bringing the total to .[1]
Use the links below to explore the five domains of RB69 pol!
