Detection of Genomic Rearrangements in K562 cells using Paired End Sequencing Rosa Maria Alvarez Massachusetts Institute of Technology Class of 2009

2 Purpose Create jumping libraries to detect genomic rearrangements in cancer cells using next generation sequencing technologies.

3 Millions of reads in parallel Reads are short Structural rearrangements are hard to detect Next Generation Sequencing

4 Why create jumping libraries? Paired end reads detect translocations Jumping libraries combine two sequences that are far apart on a small sequenceable construct Pairs at least a few kb apart are needed to scan a human genome Example: 10 million paired reads, 3 kb apart provides 10x coverage

EcoP15 I Digestion Sinefungin, ATP DNA Methylation EcoP15 I SAM Ligation of EcoP15 I CAP Adapters Biotinylated Internal Adapters Genomic DNA Shear DNA EcoP15 I Digested Molecule 27bp DNA tag PCR Adapte rs

154bp 22 cycles 25 cycles28 cycles Phusion uL template 2. 1uL template6. 1uL template 3. Phusion + SOLiD primers7. 3uL template uL template 2-Log DNA Ladder 10kb 5kb 0.2kb 0.1kb cycles28 cycles Trial PCR

7 Amplification and Sequencing Large Scale PCR amplification of library Library QC by conventional cloning and Sanger sequencing Jumping library paired end sequenced by SOLiD

8 Sanger Sequencing of Test Library; Jump Size Number of clones sequenced: 384 Number of aligning clones: 375 Number of aligning clones with both ends :148 Number of chimeras: 43

9 SOLiD Sequencing Results 13 million paired end reads generated Total aligning reads  2% aligned correctly  27% chimeras Good news: We did find the translocation!  BCR-ABL (9,22) translocation  Philadelphia Chromosome  963_1200_515_3 chr9: ; chr22: ;

10 Conclusions Constructed jumping library Structure of library molecules verified by Sanger sequencing  Jump size within the expected range Library was sequenceable by SOLiD  First mammalian SOLiD sequencing runs at the Broad Successfully detected the Philadelphia Chromosome translocation

11 Acknowledgements Louise Williams, PhD Manuel Garber, PhD Andreas Gnirke, PhD Shawna Young (Program Coordinator) Bruce Birren, PhD Thank you for your support!

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