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  • Does anyone have any experience with Helicos sequencing

    Hello Everyone,

    I was wondering if anyone has any experience in Helicos sequencing. I saw the technology on its website, and it looked pretty robust. I was wondering what were its pros and cons compared to SoliD and Illumina and it was something one would want to invest in.

    Thanks
    Abhijit

  • #2
    Dana Farber has a Helicos. Contact Paul Morrison there.

    Comment


    • #3
      Hey this belongs in...the Helicos Forum!

      Comment


      • #4
        As of this week we have completed over 1,500 ChIP-Seq samples on the Helicos. A few nanograms, no library creation, just a little poly A tailing and zoom, 9-14 million reads on 46 samples every 14 days (we like to relax before we fill it up again.).

        Just don't ask me why they just got delisted on NASDAQ and are trading at 22 cents. I have no idea. ;-( Keith Robison spells it out pretty well in the other thread. Their marketing should have been something like "It's all about the message" and focused on ChIP-Seq, RNA-Seq, DGE and all of the above from paraffin, nanogram amounts, no amplification, no bias.

        They should have never chased after the human genome. Wrong tool for the job.

        -Paul Morrison
        Last edited by polytoo; 11-21-2010, 10:06 AM. Reason: clarity pointing out the demise thread

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        • #5
          Paul,

          do you know if there is any published or publicly available ChIP-seq dataset from independent groups?

          Comment


          • #6
            Originally posted by Chipper View Post
            Paul,

            do you know if there is any published or publicly available ChIP-seq dataset from independent groups?
            Since May of 2009 we have worked on 26 different projects in 16 different labs. Virtually all are "any day now" in the publishing pipeline. Until then I can't talk about them or even name the labs.

            If a request came into my lab specifically for ChIP-Seq results I could pass the request on to labs that are close to publishing. One also might be able to get a handle on the right folks if you did a search on "new epigenetics center" and my Institute.

            Comment


            • #7
              Originally posted by polytoo View Post
              As of this week we have completed over 1,500 ChIP-Seq samples on the Helicos. A few nanograms, no library creation, just a little poly A tailing and zoom, 9-14 million reads on 46 samples every 14 days (we like to relax before we fill it up again.).

              Just don't ask me why they just got delisted on NASDAQ and are trading at 22 cents. I have no idea. ;-( Keith Robison spells it out pretty well in the other thread. Their marketing should have been something like "It's all about the message" and focused on ChIP-Seq, RNA-Seq, DGE and all of the above from paraffin, nanogram amounts, no amplification, no bias.

              They should have never chased after the human genome. Wrong tool for the job.

              -Paul Morrison
              They got delisted because their stock price didn't have a price level over $1 per NASDAQ rules.

              I have experience with Helicos mRNA-Seq (having just submitted a paper using the technology).

              Comment


              • #8
                I think Paul knows NASDAQ rules. I guess what he really meant is he doesn't know why Helicos' marketing team didn't do a good job. After all, the technology itself is good enough for some applications.
                Originally posted by Lee Sam View Post
                They got delisted because their stock price didn't have a price level over $1 per NASDAQ rules.

                I have experience with Helicos mRNA-Seq (having just submitted a paper using the technology).

                Comment


                • #9
                  I asked a PacBio rep why he thought their SMS will succeed when Helicos failed. He said because their instrument will work.

                  This may be history repeating itself. Initially people were excited about Dupont's 1st gen sequencer (which didn't work) and then ABI pulled it off successfully.

                  Comment


                  • #10
                    Originally posted by NextGenSeq View Post
                    I asked a PacBio rep why he thought their SMS will succeed when Helicos failed. He said because their instrument will work.
                    Gee, I asked Helicos some time back the same question and got the same answer. Helicos does work. It does a marvelous job on ChIP-Seq-RNA Seq and small genomes. The PacBio numbers are not that impressive right now. I look at them and place them about where Helicos was about three years ago. SMS is hard. It's definitely the future but keeping track of singular molecular events is a beotch. SMRTBell is a very clever way of getting around high error rates that SMS is prone to but it negates the best thing about SMS, you have to amplify. And you have to start with 20,000 times more DNA. Not a very good trade off but the technology will advance.

                    This may be history repeating itself. Initially people were excited about Dupont's 1st gen sequencer (which didn't work) and then ABI pulled it off successfully.
                    Dupont's Genesis 2000 did work and worked quite well. Where do you think ABI got dye terminators? But you are right, it might be history repeating itself in spades. Superior technology sometimes does not win.

                    Comment


                    • #11
                      Originally posted by polytoo View Post
                      Gee, I asked Helicos some time back the same question and got the same answer. Helicos does work. It does a marvelous job on ChIP-Seq-RNA Seq and small genomes. The PacBio numbers are not that impressive right now. I look at them and place them about where Helicos was about three years ago. SMS is hard. It's definitely the future but keeping track of singular molecular events is a beotch. SMRTBell is a very clever way of getting around high error rates that SMS is prone to but it negates the best thing about SMS, you have to amplify. And you have to start with 20,000 times more DNA. Not a very good trade off but the technology will advance.
                      I'm really interested in seeing what PacBio can output for RNA-Seq since their sequencing protocol appears to output only like 90k strands (maximum) per chip (and that's assuming 100% well efficiency, which is for sure not the case). Last time they visited us we were told that they had something for doing RNA-Seq so only time will tell.
                      Last edited by Lee Sam; 11-30-2010, 03:01 PM.

                      Comment


                      • #12
                        Any updates from any of the users who were/are still working on the Heliscope?

                        Comment


                        • #13
                          Hey everybody,

                          good to have some people already having some experience with Helicos.

                          In our Lab we are working on an RNA binding protein and try to figure out putative target RNAs. Therefore we did RIPs and subsequently sequenced them with Helicos.
                          But we have pretty low number of aligned reads (up to 21 %). We suppose this is due to the treatment of the samples with formaldehye. Doe anyone of you has experienced similar problems or has an alternative solution?

                          Comment


                          • #14
                            Dolphin22 curious what lab you work in? Thank you.

                            Comment


                            • #15
                              Dolphin22-
                              Your low aligned yield rate could be caused by many things but you can frequently diagnose some of the problems by looking at the sequence of what doesn't align. If they are very rich in either As or Ts, it was probably a sequencing problem. If short on Gs, it probably means the formaldehyde killed the Cs so you can't see the Gs. If an excess of CTAGs or portions thereof (standard Helicos base order of addition), you didn't filter properly. You may be able to sort out other issues by looking for common features of non-aligning sequences. For example, do they align to other species or does the same sequence keep appearing?
                              S

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