British Scientists Unveil New Genetically Modified Bacterial Strain With Compact Genome For Medical Advancements

British researchers have successfully engineered a new strain of Escherichia coli with a genetically altered genome. This advancement, achieved by scientists at the Medical Research Council Laboratory of Molecular Biology, involves modifying the genetic code, which is made up of nucleotide triplets known as codons. These codons are crucial for synthesising proteins necessary for life.

In nature, there are 64 codons, but only 21 are needed to produce 20 amino acids and a stop signal. The newly developed strain now includes just 57 codons instead of the usual 64. This reduction has resulted in the most compact genome among known organisms. By decreasing the number of codons, scientists have freed part of the DNA code, allowing for the design and use of novel amino acids not found in nature.

In 2019, researchers created the Syn61 strain with 61 codons, requiring 18,000 DNA modifications. In their latest study, a team led by synthetic biologist Wesley Robertson conducted over 100,000 modifications to produce a new strain named Syn57. Robertson noted that Syn57 currently grows four times slower than standard Escherichia coli. However, researchers believe further adjustments could enhance its growth rate.

The earlier Syn61 strain is already used to produce more reliable medicines. Robertson described the new strain as having a radically recoded genome, exemplifying synthetic biology's ability to transfer genetic sequences into "realms inaccessible to natural life."

The significance of this engineered bacterium lies in its potential to help create bacteria with unique virus-resistant properties. This opens new horizons for developing innovative medicines and advanced materials. It marks an important step forward in synthetic biology and genetic engineering.

This development highlights how synthetic biology can transform genetic sequences beyond natural limits. The creation of Syn57 demonstrates significant progress in designing organisms with specific traits that could revolutionise medicine and material science.

With inputs from WAM