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May 19 71 tweets 33 min read
Time for the latest @nanopore technology updates. Up next in the auditorium: an Update from the Oxford Nanopore team. #nanoporeconf Image
Please note, we invite you to read the disclaimer in the slides
CB: More information on Clive’s previous technology updates:
Next up is James Clark (JC). For a platform update. #nanoporeconf
JC: Our technology has been built on firm foundations and has matured significantly over the past couple of years. #nanoporeconf
JC: we are bringing together years of innovation to showcase one sensing platform for all biological analyses #nanoporeconf
JC: Algorithm & chemistry improvements keep pushing up accuracy. Kit 14 alongside the R10.4.1 #nanopore has been shown to achieve 99.6% modal raw read accuracy. Shown to achieve 99.2%, whilst maintaining speeds of 420 bases per second. #NanoporeConf
JC: We plan to move all nanopore platforms over to the R10 series of nanopores. #nanoporeconf
JC: Users can tune their #PromethION run to optimise their output. R10.4.1 outputs looking nice, but still tuning up the new pore. #nanoporeconf Image
JC: The Mediator is the limiter. More Mediator in the well gives consistent currents for longer resulting in higher output per channel during sequencing and long-life flow cells. #nanoporeconf
JC: Our first #PromethION 2 (P2) was shipped last week. See here: #nanoporeconf
JC: Register your interest for P2 here: nanoporetech.com/products/p2 #NanoporeConf
JC: we still have some unfinished business such as improving our flow cell design, lowering sample volumes, and improving robustness to ensure ease of use. #nanoporeconf
JC: Manufacturing is scaling up volumes as demand increases. We have dedicated teams to ensure quality of inputs and processes. This is a continuous process which leads to higher yields, less waste, more robust flow cells. #nanoporeconf
JC: new ASICs are being assessed in-house. The next generation of ASIC is designed for low noise & low power to enable the development of new product formats. #nanoporeconf Image
JC: demonstrating the new ASIC #nanoporeconf Image
Next up, Lakmal Jayasinghe (LJ) with an update on chemistry. #nanoporeconf
LJ: we can drive *output* using numbers of nanopores; driven by ASIC design, chemistry, membrane, nanopores; also speed of sequencing (faster for higher output), and a well prepared, well-loaded library to maximise ‘on’ time. #nanoporeconf
LJ: A quick update on modal single-molecule accuracy. Older baselines (Kit 9/10) have lower accuracies but fast motor (420 bases/sec). The Kit 12 has Q20+ accuracies but slow motor (250 bases/sec) – there was a need to break the output/accuracy trade-off. #nanoporeconf Image
LJ: The new chemistry (Kit 14) alongside a new nanopore (R10.4.1) has been shown to achieve 99.2% modal raw read accuracy, whilst maintaining speeds of 420 bases per second; for similar data yields to the current high-yield R9.4.1 flow cells. #nanoporeconf Image
LJ: Kit 14 will allow users to tune their accuracy & output needs by modifying run conditions — programmable in the software. Early work has shown 99.6% raw read accuracy can be achieved when run at 28 degrees. At 34 degrees 99.2% is possible whilst generating a much higher yield Image
LJ: The duplex complement strands are paired informatically. Duplex is also improved with the new chemistry and users are now able to achieve ~Q30 modal accuracy following kit updates. #nanoporeconf Image
LJ: R10.4.1 has improved homopolymer accuracy compared to R9.4.1. The next generation will have even longer reader heads to further improve homopolymer accuracy. #nanoporeconf Image
Next up, a data update from Stuart Reid (SR) #nanoporeconf
SR: Reminder there are several ways to improve the accuracy of @nanopore devices. We have driven performance improvement through continuous innovation in our chemistry, platform & training of basecalling models #nanoporeconf
SR: Accuracy means different things for different applications – which is most important to you? #nanoporeconf
SR: Raw read ‘simplex’ accuracy with Kit 14 and R10.4.1 nanopore modal accuracy 99.2 % (Q21) at 400 basepairs/sec. #nanoporeconf Image
SR: We will be introducing a choice of run conditions: “Accuracy” at 260 bps for 99.6% raw read accuracy, “Default” and “Output” at 520 basepairs/sec increasing the output of a single #PromethION Flow Cell to 307 Gb. #nanoporeconf
SR: results from ultra-long duplex reads and HG002 dataset with 260 bps condition. Modal accuracy ~Q30. Longest, Q30 duplex read: 260 kbases. Longest Q40 duplex read: 144 kbases. Longest read that perfectly aligns to a human reference: 72 kbases #NanoporeConf Image
SR: You get complete, contiguous, accurate genomes with #nanopore data - Q50+ bacterial assemblies with modest 10-20X coverage.
SR: You can call SNPs, indels & SVs with high-performance variant calling nanopore data. Use #nanopore specific tools for best performance. Check out #EPI2ME Labs for workflows, tutorials & datasets: labs.epi2me.io Image
SR: Remora – Oxford Nanopore’s latest methylation analysis tool - further enhances base-modification analysis on nanopore devices. Remora will be integrated into MinKNOW next week, enabling much simpler access to methylation data in real time. #nanoporeconf Image
SR: 5mC, 5hmC, 6mA etc… are directly observable in the nanopore signal. #Nanopore is now the most accurate technology for characterising CpG #methylation. #nanoporeconf
SR: #Nanopore chemistry will read any fragment length. The read length lower limit is configurable.
SR: Short Fragment Mode (SFM) is designed to allow reads as short as 20 bases. @nanopore has demonstrated over 250M native human reads, with an average read length of ~200 bases, on a #PromethION Flow Cell: nanoporetech.com/about-us/news/… #nanoporeconf
SR: Adaptive sampling is available as a beta feature on #PromethION & #Mk1C. #nanoporeconf
SR: A new sequencing file format, .pod5, is designed to replace .fast5 and enable faster file writing. This supports increasing device outputs and accuracy, enabling smaller raw data file sizes and streamlining downstream analysis #nanoporeconf Image
SR: Dorado is a new basecalling framework that will ultimately speed up access for users. Dorado is designed with support for @Apple GPUs & new @nvidia hardware & projected to keep up with high accuracy (HAC) models on #PromethION 48 #nanoporeconf
SR: A summary of our accuracies. #nanoporeconf Image
Next up, @RosemaryDokos (RD) with a product update. Image
RD: the #nanopore platform is fully scalable, offering the smallest flow cells with #Flongle and ultra-high throughput devices with #PromethION. Pricing of starter packs and flow cells is fully transparent on our web page: nanoporetech.com/products #nanoporeconf
RD: the platform is very versatile, and users can choose the best fit for their experiment; the answer to “how much data will I get?” often depends on which levers you vary #nanoporeconf Image
RD: We apply the same principles to product release as to innovation; initial engagement with developers and early access users evolves into fully released products, allowing us to move fast and continuously improve #nanoporeconf Image
RD: Short Fragment Eliminator Kit: Depletes short DNA fragments from your sample. Ultra-long DNA Sequencing Kit: ULK002, a move to Q20+ chemistry (Kit 14) kits with developers now. #nanoporeconf
RD: PCR cDNA Sequencing Kit: new adapter design increases flow cell output #PromethION > 160M reads & #MinION > 20M reads. #nanoporeconf
RD: Updates to #RNA sequencing. Single Cell Protocol: generate full-length transcripts from single cells, at high data volumes (>160M on #PromethION) enabling expression analysis. Direct #RNA protocol upgrade released into the community.
RD: . Critical work in public health contributing >1 million #SARSCoV2 genomes from 85 countries. The nanopore community made, and is still making, a significant contribution when the world needed it most. #nanoporeconf
RD: We have seen a strong community drive for broadening surveillance applications. This includes workflows for African Swine Fever, TB, respiratory metagenomics & routine pathogens such as #COVID19 and influenzas #nanoporeconf
RD: VolTRAX for #SARSCoV2 sequencing library prep - 4 sample per cartridge. #nanoporeconf
RD: We are preparing to launch Kit 14 versions of Ligation Sequencing Kit, the Native Barcoding Kit: 24 and 96, Cas9 barcoding method to early access customers and Rapid Barcoding Kit. #nanoporeconf Image
RD: Stu's talk in one slide: key sequencing releases #nanoporeconf Image
RD: The community are running high impact human projects: at scale, at speed and at depth. #nanoporeconf Image
RD: #nanopore sequencing provides biology in full colour Image
And now @The__Taybor (CB) to close with a few new and notable updates #nanoporeconf
CB: The MinION Mk1D. This is designed to be a tablet + keyboard with an integrated sequencer, VolTRAX too I hope, and will mean that users can simply dock a recommended tablet into the MinION Mk1D, pair it, and initiate sequencing. Register your interest: register.nanoporetech.com/minion-mk1d
CB: Nanopore sequencing is setting a new gold standard for methylation calling. #nanoporeconf
CB: Remora 1.0 models improve signal scaling which results in higher detection accuracy and quality filtered calls achieving 99.8% accuracy for 5mC in CpG contexts. #nanoporeconf
CB: Outy sequencing has potential to enable adaptive sampling + adaptive accuracy, & potential future application for highly accurate sequencing of rare molecules, single-molecule re-reading & variant calling. To find that needle in a haystack. #nanoporeconf
CB: Following analysis of Clive’s own genome and cell-free DNA isolated from plasma — the ‘cf Cliveome’ — using SFM, the team uncovered interesting biology, including plausible tissue typing from methylation data and greater insight into nucleosome arrangements #nanoporeconf Image
CB: looking forward to raw sample to sequence - true liquid biopsy that could be deployed, for example, in a nanopore toothbrush. From end to end we can start with swab/spit, proof of concept now achieved #nanoporeconf Image
This is designed for future environments where they don't have vortexes or pipettes. The sample could be wound pus, or a supermarket shelf #nanoporeconf
CB: What does the ideal device look like for decentralised sequencing? early blood glucose, 20 years ago, involved going to an office and giving blood. I think the ideal device would be a toothbrush - 50k white blood cells per ml in saliva. #nanoporeconf
CB: if we see something that looks suspicious, we can sequence it again and again and again. The toothbrush is on Wifi. Bonkers, never been done. This is where I want to take this technology. "Clive's fantasy product" #nanoporeconf
CB: There are lots of ways to sequence proteins on nanopores - some of which have been published. We think the same @nanopore platform that can be used to sequence DNA and RNA can be used for proteins #nanoporeconf Image
CB: no. of steps a motor takes on DNA is >than one per amino acid. We put a construct on the pore, it looks like sequencing but we let the peptide go through the construction. We see a DNA signal 1st, then peptide signal-that was a struggle to see but now we can. #nanoporeconf
CB: as you can see here we are starting to generate profiles for more than one amino acid. They are very reproducible. #nanoporeconf Image
CB: we're learning a lot from this. #nanoporeconf Image
CB: we want to start with a complex mix of proteins - a complex sample like blood, yeast, bacteria, and run on the same hardware that we use for DNA. So anyone could do complex proteomics on a MinION, GridION, PromethION. This is hard, very difficult #nanoporeconf Image
CB: in summary, we can generate reproducible profiles of more than one amino acid - early proof of concept towards future protein sequencing #nanoporeconf
CB: in summary: we want to go from sample to answer easily, and to truly democratise liquid biopsy #nanoporeconf
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More from @nanopore

May 19
Please take your seats for @gordon_sanghera's opening plenary of London Calling 2022. #nanoporeconf
GS: Lord Kelvin believed in meaningful measurement to see the whole picture. With nanopore sequencing you gain more comprehensive insights than ever before. #nanoporeconf
GS: In the 3 years since the last time we were at Old Billingsgate, @nanopore has released 200+ products, increased our single-molecule raw read accuracy from 95% to 99.6% & hugely improved our scalability & output. #nanoporeconf
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Dec 1, 2021
Opening the Nanopore Community Meeting Tech Update is James Clarke, valiantly speaking through a bad, bad cold. We'll be live tweeting in this thread, with Stu Reid and Rosemary Dokos up next #nanoporeconf
JC: @nanopore accuracy has come a long way. Right now, in just 3-4 seconds, I can pass 1,000 bases of a **single molecule** of DNA through a hole, and know its sequence with over 99% accuracy. That’s better than Q20, by looking at a single molecule - once #nanoporeconf
JC: Beyond single molecule, you can of course use multiple strands in a pile-up. We’ve achieved Q50 consensus accuracy on bacterial genomes, from 20X coverage. #nanoporeconf
Read 74 tweets
Dec 1, 2021
Up in a few minutes, Clive G Brown @the_taybor with a plenary talk on @nanopore sequencing. We'll live tweet in this thread 1/n #nanoporeconf
@The_Taybor CB: our goal is to enable the analysis of anything, by anyone, anywhere #nanoporeconf
CB: A reminder of how nanopore works #nanoporeconf
Read 42 tweets
Dec 1, 2021
For those using @ArticNetwork Midnight for #SARSCoV2 sequencing: analysis of the available data (55 genomes) showed that 100% were correctly identified as Omicron. We’ve observed 1 amplicon dropout out of 29. This is outside of the S gene & does not impact correct lineage ID 1/4
Whilst the amplicon dropout does not affect identification of the Omicron variant, the Midnight kit will be revised to include an additional primer to improve amplification efficiency of Omicron Amplicon 28. We expect this to be available in 2-4 weeks 2/4
We are again thankful to @freed_nikki and the entire @ArticNetwork community for quick and open data sharing so that we can continue to provide high quality solutions for #SARSCoV2 surveillance around the globe 3/4
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May 20, 2021
Coming up in a few minutes, Clive Brown @the_taybor, with an update entitled “Nobody Expects the Strandish Exposition”. Follow the talk live in this thread #nanoporeconf
CB: Our goal is to enable the analysis of anything by anyone, anywhere. Here are some examples of global use: nanoporetech.com/portable-seque…
CB: As a reminder, this is how nanopore sequencing works. #nanoporeconf
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Dec 2, 2020
Opening the tech update at the Nanopore Community Meeting, from Oxford @Nanopore, James Clark, VP platform technology #nanoporeconf
JC: a reminder that our goal is to enable the analysis of anything, by anyone, anywhere #nanoporeconf
JC: Looking at about the key qualities of nanopore sequencing: high accuracy data, with high yields, information-rich data, a versatile platform that scales from portable to ultra-high throughput #nanoporeconf
Read 61 tweets

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