Monday, July 01, 2019

Will Regulators Scotch PacBio Acquisition?

When Illumina announced its proposed acquisition of Pacific Biosciences last fall, an immediate question arose as to whether the deal would pass antitrust review.  Illumina must have been optimistic, as they originally expected the deal to close in "mid-2019".  That timetable has now been rolled back to late 2019 in the face of the UK agency with jurisdiction over mergers deciding to go for a second round of review and no word yet from the U.S.'s Federal Trade Commission.

Tuesday, June 18, 2019

ONT & The Woodford Liquidity Squeeze

There's an unfortunate chain of events that may end up causing a headache for Oxford Nanopore, and it's completely outside their control.  One of the their key investors has just had his luck - or perhaps more critically his reputation -- at stock picking disintegrate.  Because of some unusual choices, that has potential repercussions for ONT.

Thursday, May 30, 2019

The Genius of Plongle

I noted in my roundup of Oxford Nanopore technical announcements that I loved the Plongle concept.  This is really both a new application-specific integrated circuit (ASIC) and using it to build a 96-well sequencer.  Let me expand on what there is to love.

ONT's Horrid Data Storage Folly

In the coverage of ONT's announcements at London Calling, I specifically left out one of Clive's Skunk Works projects.  This would be a device to use nanopores to write digital information.  I'll give him points for creativity, but the reason I held this for here is I truly and sincerely hate the concept and didn't want my vitriol to distract within the other piece.  But here I will let loose.

Wednesday, May 29, 2019

ONT's London Calling Announcements, Pass One

The annual big Clive Brown London Calling talk had a twist this year  Brown introduced a set of senior lieutenants at Oxford Nanopore and then tacked on a few "and one more thing" moments at the end.  If you're looking for the TL;DR version from me, it is that there were a lot of sensible but non-Earth shattering updates from the team followed by Clive updating on one prior crazy idea and throwing out two more -- one of which I love and the other I believe should be thrown out posthaste.

Thursday, May 23, 2019

Nanopore's Long DNA Paradox

The first half day of London Calling has already delivered the usual mix of scientific excitement.  The prospect of lives, particularly those of children, en masse by delivering precision oncology broadly across sub-Saharan Africa.  Dizzying levels of alternative splicing in a key brain ion channel.  RNA modifications in great numbers.  That one was also gratifying as it was commented that even without a basecaller, modified bases can be be suggested by higher error rates around a particular motif.  Around 2015 or so I noted in the Nanopore Community post that error rates went up around GATC sites in E.coli, the target of Dam methylase.  Protein tags read by the current nanopore scheme. Tonight we get Clive and company performing their usual razzle-dazzle of product announcements; one person pointed out to me a possible angle I failed to include in my laundry list is the raising of the speed limit from 450 to perhaps 1000 bases per second.  But another omission was front-and-center in the plant genomics sub-session I attended and could be called the central paradox of the current state of nanopore sequencing:  pores are great for long DNA but long DNA is not great for pores.

Tuesday, May 21, 2019

Care to Pore Over My Laundry List?

London Calling is this week, so get ready for lots of Oxford Nanopore in my Twitter channel and if I'm on the ball, in this space.  ONT has made a number of releases and updates and there have been other developments within the nanopore ecosystem which I've failed to report.  Here, in not terribly organized fashion, is a laundry list of things I'm thinking about going into the meeting

Monday, May 20, 2019

Mass Recoded E.coli Genome Not Tripped Up By Programmed Frameshifts

There's a paper this week in Nature announcing an E.coli genome which has had two serine codons (UCA, UCG) and one stop codon (UAG) removed from usage.  It's a major work on synthetic biology and represents the largest designed sequence ever built.  In contrast to Craig Venter's early effort, which moved a synthesized genome into a cellular ghost of a natural bacterium, this one replaced the native E.coli genome in stages -- Escherichia theseusshipii would be a good name for the new strain. But is the genome quite what is advertised? Following up on a pair posts from Sandeep Chakraborty showing remaining UCA, UCG codons and UAG codons in a bunch of typical genes, I decided to look for a trickier set of possibilities to overloop -- and by luck or care the Nature paper got these.  Just to put one gripe front-and-center, the group deposited in Genbank the reduced genome version of E.coli they started with, but not the recoded genome, which is in the supplementary material