Genomics Lesson 12 presentation 3 Hardison several slides from Dr Cooduvalli Shashikant 42615 1 Genome Editing Removal modification or addition of a functional element into the genome of a living cell or organism ID: 816111
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Slide1
Genome Editing
BMMB 551 GenomicsLesson 12, presentation 3Hardison(several slides from Dr. Cooduvalli Shashikant)
4/26/15
1
Slide2Genome Editing
Removal, modification, or addition of a functional element into the genome of a living cell or organismGenes, regulatory regionsRandom changesInsertion of plasmids or viruses at any of many accessible targetsDirected changesHomologous recombinationSequence-specific DNA binding macromoleculesProtein domains: Zn fingers, TALEsRNA: CRISPR
4/26/152
Slide3Sequence-directed DNA cleavage
http://www.youtube.com/watch?v=
zDkUFzZoQAs
Nature Methods
January 2012
issue
Slide4Zinc Finger Endonuclease
Array of zinc fingers (3-6) recognizing specific sequences are designedZn finger domains linked to FokI
endonuclease domainBind to specific sequences and cleave sequences Induces double stranded break that can be repaired
Urnov
et al., Nat rev gen, 11, 636, 2010
Slide5TALES
Transcription Activator-like Effectors (TALE) produced by plant pathogen,
Xanthomonas spp
17
-18 repeats of 34 amino acids arranged side by side
DNA binding specificity is determined by the amino acids at positions 12 and 13 within each
repeat
Slide6TALENS
Slide7Example of targeted binding
4/26/157
Slide8CRISPR and CAS9
4/26/158
Mali et al. (2013) Nature Methods 10: 957- 963
Slide9CRISPR RNAs guide CAS9 to specific genomic targets
4/26/159
Slide10CAS9 can be modified to direct a marker or enzyme to a specific genomic target
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Mali et al. (2013) Nature Methods 10: 957- 963
Slide11CAS9-CRISPR to alter sequences or direct activities to specific locations
4/26/1511
Mali et al. (2013) Nature Methods 10: 957- 963