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Newly discovered deep-sea enzyme breaks down PET plastic

phys.org

11–20 of 78 posts

Re: Newly discovered deep-sea enzyme breaks down PET plastic

#11
post #4
post #2

Now splice this into the genome of black mold and release it in a coca-cola bottling plant.

Don't laugh, someday a terrorist or hacker may engineer a fast-eating critter, and half our stuff will become useless in a year. Termites learned to work with gut microbes to speed up wood munching, a home-owner's biggest nightmare.

Humans are pretty adaptable. If half our stuff did become useless do you think that might put a damper on rampant consumerism?

Re: Newly discovered deep-sea enzyme breaks down PET plastic

#14
post #8
post #3

Slightly misleading headline, as PET (polyethylene terephthalate) hydrolases were already known - see https://www.chm.bris.ac.uk/motm/PETase/PETaseh.htm This is a study of an archaeal enzyme (from the deep-sea) that can degrade both long-chain and short-chain polymers that is more efficient at 70 deg C than other enzymes. The details are that this is a feruloyl esterase with a conserved alpha/beta-hydrolase fold but…

Yeah, it's not bad news at all but it appears to be one of many that still require considerable heat, industrial infra, etc. Has anyone attempted to put these enzymes to the test in at some scale in an industrial setting, I wonder?

Should work well in landfills since there's heat buildup

Re: Newly discovered deep-sea enzyme breaks down PET plastic

#15
post #11
post #4

Earlier quoted context omitted.

Don't laugh, someday a terrorist or hacker may engineer a fast-eating critter, and half our stuff will become useless in a year. Termites learned to work with gut microbes to speed up wood munching, a home-owner's biggest nightmare.

Humans are pretty adaptable. If half our stuff did become useless do you think that might put a damper on rampant consumerism?

It would increase consumerism since everything would need to be replaced on a periodic basis

Re: Newly discovered deep-sea enzyme breaks down PET plastic

#16
post #3

Slightly misleading headline, as PET (polyethylene terephthalate) hydrolases were already known - see https://www.chm.bris.ac.uk/motm/PETase/PETaseh.htm This is a study of an archaeal enzyme (from the deep-sea) that can degrade both long-chain and short-chain polymers that is more efficient at 70 deg C than other enzymes. The details are that this is a feruloyl esterase with a conserved alpha/beta-hydrolase fold but…

> Slightly misleading headline, as PET (polyethylene terephthalate) hydrolases were already known

It doesn't say it was the only one, just a newly discovered one

Re: Newly discovered deep-sea enzyme breaks down PET plastic

#18
post #8
post #3

Slightly misleading headline, as PET (polyethylene terephthalate) hydrolases were already known - see https://www.chm.bris.ac.uk/motm/PETase/PETaseh.htm This is a study of an archaeal enzyme (from the deep-sea) that can degrade both long-chain and short-chain polymers that is more efficient at 70 deg C than other enzymes. The details are that this is a feruloyl esterase with a conserved alpha/beta-hydrolase fold but…

Yeah, it's not bad news at all but it appears to be one of many that still require considerable heat, industrial infra, etc. Has anyone attempted to put these enzymes to the test in at some scale in an industrial setting, I wonder?

No idea. From skimming some university press releases, I see a lot of "potential for!" and similar wording.

This https://news.utexas.edu/2022/04/27/plastic-eating-enzyme-cou... has "Up next, the team plans to work on scaling up enzyme production to prepare for industrial and environmental application. " which is more promising.

As far as I understand, yes it is a very different challenge to make a bioreactor for actually using some random new enzyme than the (also hard) problem of getting the structure in the first place. How to immobilize it on some surface, how to pre-process the material to pass it through the reactor (?) I guess ...

Re: Newly discovered deep-sea enzyme breaks down PET plastic

#19
post #3

Slightly misleading headline, as PET (polyethylene terephthalate) hydrolases were already known - see https://www.chm.bris.ac.uk/motm/PETase/PETaseh.htm This is a study of an archaeal enzyme (from the deep-sea) that can degrade both long-chain and short-chain polymers that is more efficient at 70 deg C than other enzymes. The details are that this is a feruloyl esterase with a conserved alpha/beta-hydrolase fold but…

> Slightly misleading headline, as PET (polyethylene terephthalate) hydrolases were already known It doesn't say it was the only one, just a newly discovered one

Sure, fair enough. I just thought people might read it as "Enzyme with new ability (to break down PET) discovered", but maybe I was being pessimistic.

Re: Newly discovered deep-sea enzyme breaks down PET plastic

#20

Earlier quoted context omitted.

> Slightly misleading headline, as PET (polyethylene terephthalate) hydrolases were already known It doesn't say it was the only one, just a newly discovered one

Sure, fair enough. I just thought people might read it as "Enzyme with new ability (to break down PET) discovered", but maybe I was being pessimistic.

It's also mentioned in the article body:

> Until now, about 80 different PET-degrading enzymes were known, most of which were found in bacteria or fungi.

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