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A solution to snap molecules collectively like Lego wins 2022 chemistry Nobel


A toolkit for snapping collectively molecules like Lego constructing blocks has received the 2022 Nobel Prize in chemistry.

Chemists Carolyn Bertozzi of Stanford College, Morten Meldal of the College of Copenhagen and Barry Sharpless of the Scripps Analysis Institute in La Jolla, Calif., will evenly break up the prize for growing click on chemistry and bioorthogonal chemistry, the Royal Swedish Academy of Sciences introduced October 5 in a information convention in Stockholm. These instruments enable scientists to simply assemble advanced molecules within the lab and inside residing organisms.

Chemist Carolyn Bertozzi (left) developed bioorthogonal chemistry, whereas chemists Morten Meldal (center) and Barry Sharpless (proper) pioneered click on chemistry.L.A. Cicero; Scripps Analysis; College of Copenhagen

“The nice factor with this discovery is that it may be used for nearly the whole lot,” mentioned Olof Ramström, a chemist on the College of Massachusetts Lowell and a member of the Nobel committee for chemistry. Functions embrace constructing drug molecules, polymers, new supplies and monitoring biomolecules amongst cells. 

“We’re form of on the tip of the iceberg already when it comes to functions,” says Angela Wilson, president of the American Chemical Society. “I believe this chemistry goes to revolutionize drugs in so many areas.”

Round 20 years in the past, Sharpless launched “click on chemistry” — a solution to merely and shortly connect two compounds utilizing sure connector molecules. However discovering these Lego-like connector molecules that may bond collectively in a chemical response wasn’t simple. Working independently, Sharpless and Meldal found an answer. 

By including a smidge of copper to a mix containing two different small molecules — referred to as an azide and an alkyne — the scientists might quickly snap the 2 molecules collectively right into a ring-shaped chemical. With out the copper, the molecules would ultimately mix, however sluggishly, Ramström mentioned. 

The response shortly “gained huge curiosity throughout chemistry and associated fields,” he added. Although scientists would later uncover a handful of different molecules that might snap collectively in the identical vogue, that first response is taken into account the “crown jewel of click on reactions.” 

However whereas catalyzing reactions with copper may go high quality in a glass beaker, the metallic can hurt residing cells. Bertozzi found a solution to do copper-free click on chemistry, so scientists can now design chemical reactions within organisms with out mucking up their regular mobile features. 

Bertozzi tricked cells into incorporating a click on chemical into sugars adorning the cell’s floor. When scientists expose these cells to a unique click on chemical, a sort of alkyne, the 2 can snap collectively, similar to the molecules in Sharpless’ and Meldal’s reactions. By linking the alkyne to green-glowing molecules, scientists can illuminate the surfaces of cells. 

“Think about you would connect shining molecules to biomolecules in a residing cell. Then you would comply with them in a microscope and see the place they’re and the way they transfer. That is what Carolyn Bertozzi did,” mentioned Johan Åqvist, a theoretical chemist at Uppsala College in Sweden and chair of the Nobel committee for chemistry.

Bertozzi’s specialty has been learning sugar molecules, which “are extremely tough to work with,” says Leslie Vosshall, a neuroscientist on the Rockefeller College in New York Metropolis, who’s the vice chairman and chief scientific officer on the Howard Hughes Medical Institute. Simple strategies exist for taking a look at DNA, RNA and proteins, however not a lot for sugars, she says. “Sugars are the darkish matter of the cell.”

By focusing on particular sugars on cell surfaces, scientists can develop new remedies. As an illustration, Bertozzi and her colleagues had been capable of goal and deactivate sugars that had been serving to tumor cells conceal from T cells within the physique (SN: 3/21/17).

Bertozzi, an HHMI investigator, is the 59th girl to win a Nobel Prize since 1901, and simply the eighth to be awarded a prize in chemistry. In 2021, Emmanuelle Charpentier and Jennifer Doudna had been the final girls to win chemistry Nobels, for his or her work on the gene-editing software referred to as CRISPR (10/7/21).

“Carolyn is… one of many astonishingly few girls in chemical biology,” Vosshall says. “Her lab has been a generative place that has impressed girls chemists and put them out into the world.”

When woke up by the information round 3 a.m. Pacific Time, Bertozzi mentioned, “I’m completely surprised. I’m sitting right here and may hardly breathe.” Calling the middle-of-the-night cellphone name a shock is an understatement, she added. “I’m nonetheless not solely constructive that it’s actual, nevertheless it’s getting realer by the minute.”

Bertozzi, Meldal and Sharpless will share the prize — 10 million Swedish kronor, roughly $917,000. The award is the second Nobel for Sharpless, who shared the prize in 2001 for his work on growing catalysts for oxidation reactions. 

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