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Science Puts A GIF Inside Of Live Bacteria

14 Julio 2017

CRISPR is a group of proteins and DNA that act as an immune system in some bacteria, vaccinating them with genetic memories of viral infections.

Eadweard Muybridge's image of galloping horse have been transferred into the DNA of living cells.

Researchers are developing ways to harness DNA, the blueprint of biological life, as a synthetic raw material to store large amounts of digital information outside of living cells, using expensive machinery. Harvard geneticist and molecular chemist George Church, another author of the Nature study, encoded his book Regenesis in 2012 and made 90 billion copies of the text.

With this work, Shipman said they eventually want to create "molecular recorders", which are living cells that could sense things in the environment, like toxins or heavy metals, and record and store that information within their DNA. We often think of its units, the As, Cs, Ts, and Gs, as letters of the words in an instruction manual.

The researcher who discovered AcrIIA4, Joseph Bondy-Denomy of UC San Francisco, foresees these anti-CRISPR proteins becoming a standard part of CRISPR gene therapy, given along with CRISPR-Cas9 to disable gene editing after a fixed period of time to prevent random off-target cutting.

Before any of that happens, however, "there's a lot of important efficacy and safety [investigations] that still need to be done", Corn says.

They used what's known as Crispr editing technology, in which two proteins are used to insert genetic code into the DNA of target cells.

The researchers then used the gene editing technology CRISPR to embed this sequence of information into the genome of the bacteria E. coli, adding a new frame of animation each day. In doing so, we push the technical limits of this information storage system and optimize strategies to minimize those limitations.

Anti-Crispr proteins stop Crispr-Cas9 from working, by mimicking DNA, and effectively tricking Crispr-Cas9 into binding with it, and then never letting go.

"We want to turn cells into historians". They then created DNA codes that corresponded to each color and strung several codes together. No animals were harmed in the process of encoding the films mentioned above, but the same can't be said for all bacteria cells. While scientists recognize potential applications for Cas9 inhibitor proteins in gene editing of mammalian cells, the mechanisms underlying such processes have not fully been established.

The study demonstrated that one particular anti-CRISPR protein called AcrIIA4 reduced by four-fold the off-target effects of a CRISPR-Cas9 molecule that uses a guide RNA to find, snip and replace the mutated hemoglobin gene responsible for sickle cell disease.

A trailer of sorts has been released by a team of scientists based at the Wyss Institute for Biologically Inspired Engineering and Harvard Medical School. The team then grows the bacterial population, which they then sequence, reading the DNA, and translate, recreating the image. One part that could be used more frequently, suggests the Wyss/Harvard team, is the ability to write information into the genome of a living cell by the addition of nucleotides over time.

Science Puts A GIF Inside Of Live Bacteria