throbber
Nan Leng
`Hugo Lam
`Shujun Luo; John West; Christian Haudenschild; Mark Pratt; Christian Haudenschild; Richard Chen
`Re: MiSeq 2x250 run completed over the weekend
`Tuesday, August 28, 2012 10:19:14 AM
`
`From:
`To:
`Cc:
`Subject:
`Date:
`
`Hi All,
`
`I downloaded the 2x250 dataset from basespace into here /local/science-ops-
`1a/data/miseq/A1NGW/A1NGW_S0_L001_R1_001.fastq.gz
`
`I installed smalt which is the next generation aligner from Sanger after SSAHA2
`(http://www.sanger.ac.uk/resources/software/smalt/).
`time /home/nleng/bin/smalt-0.6.3/smalt_x86_64 map -i 800 -f samsoft -o map_1.sam -n 1
`/science/data/index/smalt/hg19 A1NGW_S0_L001_R1_001.fastq
`A1NGW_S0_L001_R2_001.fastq
`
`The initial quick test show smalt works. I got the map.sam file within 40min using 40core
`which is slower than BWA-SW. It will take roughly 24hrs to align 1x of 2x250. I am still
`testing this brand new aligner and will collect more stats later on.
`
`In the mean time, I will try to get MOSAIK and BFAST work.
`
`Thanks,
`
`Nan
`
`On 08/27/2012 11:26 AM, Hugo Lam wrote:
`
`Using BWA to align 1x of 2x300 took ~12 hrs. So a 40-core computer for a 40x
`2x250 will still take 10-12 hrs to finish the alignment. If we run the alignment on
`all 6 R910s we have, we can cut if down to less than 2 hrs for the alignment. Nan
`will be helping out on testing couple more aligners and we will have a better
`assessment on the alignment and its quality once he has finished it.
`
`On Mon, Aug 27, 2012 at 9:34 AM, Shujun Luo <shujun.luo@personalis.com>
`wrote:
`We got 3.1G for this run, and 2.4G with Q >30. Read1 error rate is 0.9 and read2 error rate
`is 1.44
`
`From: John West <john.west@personalis.com>
`
`Date: Monday, August 27, 2012 7:20 AM
`To: Microsoft Office User <shujun.luo@personalis.com>
`
`Cc: Christian Haudenschild <christian.haudenschild@personalis.com>, Mark Pratt
`<mark.pratt@personalis.com>, Christian Haudenschild
`<chaudenschild@personalis.com>, Nan Leng <nan.leng@personalis.com>, Richard
`
`Personalis EX2078.1
`
`

`

`Chen <richard.chen@personalis.com>, Hugo Lam <hugo.lam@personalis.com>
`Subject: MiSeq 2x250 run completed over the weekend
`
`All,
`
`This was our first run with Illumina's newest sequencing biochemistry, rumored to have a
`new & better polymerase. They have released it on the MiSeq first and, as I understand it,
`plan a HiSeq version later this year, but only 2x150 bases there.
`
`Shujun :
` How many raw G bases resulted from this run ?
` Is there a run # we can refer to it by ?
`
`Nan :
` Can you please download this from BaseSpace, convert the raw data (no GATK Q-score
`recalibration) to a SAM file and put it on a memory stick for me ? I will give you a memory
`stick for this when I get in.
`
`Also, can you run the QC tool on this and circulate the result ? I am particularly interested
`in the GC bias.
`
`Christian :
` Do you know when our MiSeq will be upgraded to dual-surface imaging, which should
`double it's yield per run ?
`
`Hugo :
` What are your thoughts on alignment of this longer read data ?
`
`Thanks,
`
`John West
`
`Cell (408) 836-5586
`jwest38261@aol.com
`
`On Aug 26, 2012, at 11:07 PM, Shujun Luo <shujun.luo@personalis.com> wrote:
`
`Hi John,
`
`We have the most updated chemistry for HiSeq, i.e., PCR free gel free sample
`prep, v3 cluster and sequencing chemistry.
`
`I just finished one 2x250 miseq run with the new sequencing reagent, with
`the PCR free gel free Amy library. The seq matrix looks good. The data is
`
`Personalis EX2078.2
`
`

`

`available at our basespace account. For some reason, there is no alignment
`data on basespace any more, and we will do a local alignment tomorrow.
`
`Thanks,
`
`Shujun
`
`From: John West <john.west@personalis.com>
`Date: Sunday, August 26, 2012 9:51 PM
`To: Christian Haudenschild <christian.haudenschild@personalis.com>
`Cc: Mark Pratt <mark.pratt@personalis.com>, Microsoft Office User
`<shujun.luo@personalis.com>, Christian Haudenschild
`<chaudenschild@personalis.com>
`Subject: Re: Newest reagents for HiSeq operation
`
`Hi Christian,
`
`I think the SRA data we downloaded earlier this year might
`have been PCR-free but not gel-free ? Mark ?
`
`It would be great to try a MiSeq 2x250 Amy genome. Do we have the best
`library for that ? Would that be PCR-free gel-free too?
`
`Thanks,
`
`John West
`
`Cell (408) 836-5586
`jwest38261@aol.com
`
`On Aug 26, 2012, at 9:35 PM, Christian Haudenschild
`<christian.haudenschild@personalis.com> wrote:
`
`The data downloaded from illumina that is from january was
`V3 and no PCR I believe.
`We are only running V3.
`We have or should have received V2 miseq on Friday, so we
`could try a real 2X250 and see where it gets us, illumina
`upgraded the miseq software on thursday.
`Christian.
`
`From: John West <john.west@personalis.com>
`Date: Sunday, August 26, 2012 8:57 PM
`
`Personalis EX2078.3
`
`

`

`To: Mark Pratt <mark.pratt@personalis.com>, shujun luo
`<shujun.luo@personalis.com>, Christian Haudenschild
`<chaudenschild@personalis.com>
`Subject: Newest reagents for HiSeq operation
`
`Mark, Shujun, Christian,
`
`I have been discussing with Mark how to use the results of our
`A/B comparisons to direct our development of accuracy-
`improving sample preps and bioinformatics. He has pointed
`out that the A/B comparisons we have so far are based on data
`from the Broad, using v2 Illumina sequencing chemistry. Now
`there is not only a v3 sequencing chemistry, but as I
`understand it, also a TruSeq PE Cluster kit v3-cBot-HS, which is
`supposed to significantly reduce GC-bias induced at high
`cluster density. On the Illumina web site, some of that seems
`to be fairly new, but it is a little hard to tell. For our in-house
`HiSeq runs, do we have these newest reagents ? It is pretty
`important for us to move our analysis forward from v2. If we
`do not have them yet, do we know when we will ? I am also
`not sure if we are following the gel-free PCR-free library prep
`protocols, or if there are issues with them ? They are also
`supposed to help a lot in reducing GC-bias.
`
`Perhaps we can meet briefly Monday to discuss the next HiSeq
`run.
`
`Thanks,
`
`John
`
`--
`Hugo Lam, PhD
`Project Manager, Computational Biology
`Personalis Inc.
`http://www.personalis.com/
`
`Personalis EX2078.4
`
`

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