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NextGen Sequencing data intro.
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David Rio Deiros
March 26, 2012
Research
3
230
NextGen Sequencing data intro.
Brief introduction to nextgen sequencing data.
David Rio Deiros
March 26, 2012
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Transcript
Next-Gen Sequencing Data
@shiondev
@drio
None
Σ Bases DNA == “The Genome”
Σ Bases DNA == “The Genome” 3Gbp
…ACAGTTTTCAAGAGCCGGTTTTACTAGGATTATTACTG…
…ACAGTTTTCAAGAGCCGGTTTTACTAGGATTATTACTG… G
…ACAGTTTTCAAGAGCCGGTTTTACTAGGATTATTACTG… G
…ACAGTTTTCAAGAGCCGGTTTTACTAGGATTATTACTG… G T
…ACAGTTTTCAAGAGCCGGTTTTACTAGGATTATTACTG… G T -‐
…ACAGTTTTCAAGAGCCGGTTTTACTAGGATTATTACTG… G T -‐ A
…ACAGTTTTCAAGAGCCGGTTTTACTAGGATTATTACTG… G T -‐ A
SEQUENCING
None
# of Bases per day per machine
200kbp 2000
1Mbp 2003
200 Mbp 2005
3Gbp 2009
60Gbp 2012
what can we do with NGS data?
Re-sequencing
Re-sequencing Looking for changes in a Genome
Re-sequencing Looking for changes in a Genome (Given that we
have a HIGH quality reference)
Re-sequencing Looking for changes in a Genome (Given that we
have a HIGH quality reference) Consequences?
Reliably finding those changes is not easy
(1%-3%) of your bases may be errors.
30x
What’s the typical workflow in a re-sequencing project ?
Library preparation
Library preparation Sequencing
Library preparation Sequencing Analysis I (images -> reads)
.fastq ... >HWI-ST821_0129:5:1101:1927:2089#GATCAG/1 TGGACAACGGCCAGGTTAATGATGGGCAGGTAGAAGATGATCACT +HWI-ST821_0129:5:1101:1927:2089#GATCAG/1 ___ccccccYc[eff`]X`a^ef][RHP^_cXIYSXcXcfSWXcd ...
Library preparation Sequencing Analysis I (images -> reads) Analysis II
(alignments)
None
Library preparation Sequencing Analysis I (images -> reads) Analysis II
(alignments) Analysis III (Variant calling)
.vcf
Library preparation Sequencing Analysis I (images -> reads) Analysis II
(alignments) Analysis III (Variant calling) Annotation
Library preparation Sequencing Analysis I (images -> reads) Analysis II
(alignments) Analysis III (Variant calling) Annotation Science starts here …
None
Library preparation Sequencing Analysis I (images -> reads) Analysis II
(alignments) Analysis III (SNP calling) Annotation 5/15 Tb 150Gb 80G 16 8G 1G 1 400Mb 1
1 Genome (3-6 days) ~ 230Gb
1 Genome
Let’s do it again for N genomes
Let’s do it again for N genomes
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personalize medicine
personalize medicine Tailor physician decisions and practices to individual patients
Let’s do it again for N genomes
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Thanks!