{"id":324208,"date":"2021-12-14T12:30:00","date_gmt":"2021-12-14T11:30:00","guid":{"rendered":"https:\/\/innovationorigins.com\/?post_type=selected&p=324208"},"modified":"2021-12-14T12:30:00","modified_gmt":"2021-12-14T11:30:00","slug":"plastic-degrading-enzymes-grow-in-response-to-pollution","status":"publish","type":"selected","link":"https:\/\/ioplus.nl\/archive\/en\/selected\/plastic-degrading-enzymes-grow-in-response-to-pollution\/","title":{"rendered":"Plastic-degrading enzymes grow in response to pollution"},"content":{"rendered":"\n

\u200bThe number of microbial enzymes with the ability to degrade plastic is growing, in correlation with local levels of plastic pollution. That is the finding of a new study from Chalmers\u00a0that measured samples of environmental DNA from around the globe. The results illustrate the impact plastic pollution is having on the environment, and hint at potential new solutions for managing the problem, writes Chalmers University in a press release<\/a>.\u200b<\/p>\n\n\n\n

\u200bThe problems of global plastic pollution are all too widespread, as mass-production of plastic has exploded in the last 70 years or so \u2013 from around 2 million tonnes per year to around 380 million. This has given sufficient evolutionary time for various microbes present in the environment to respond to these compounds, and many different enzymes have been discovered in previous studies with the ability to degrade different plastics.<\/p>\n\n\n\n

The new study<\/a>, recently published in the scientific journal mBIO, analysed samples of environmental DNA from hundreds of locations around the world. The researchers used computer modelling to search for microbial enzymes with plastic-degrading potential, which was then cross-referenced with the official numbers for plastic waste pollution across countries and oceans.<\/p>\n\n\n\n

\u201cUsing our models, we found multiple lines of evidence supporting the fact that the global microbiome’s plastic-degrading potential correlates strongly with measurements of environmental plastic pollution \u2013 a significant demonstration of how the environment is responding to the pressures we are placing on it,\u201d says\u00a0Aleksej Zelezniak,\u00a0Associate Professor in Systems Biology at Chalmers.\u00a0<\/p>\n\n\n\n

More enzymes in the most polluted areas<\/h3>\n\n\n\n

In other words, the quantity and diversity of plastic-degrading enzymes is increasing, in direct response to local levels of plastic pollution. In total, over 30,000 enzyme \u2018homologues\u2019 were found with the potential to degrade 10 different types of commonly used plastic. Homologues are members of protein sequences sharing similar properties. Some of the locations that contained the highest amounts were notoriously highly polluted areas, for example samples from the Mediterranean Sea and South Pacific Ocean. <\/p>\n\n\n\n

\u201cCurrently, very little is known about these plastic-degrading enzymes, and we did not expect to find such a large number of them across so many different microbes and environmental habitats. This is a surprising discovery that really illustrates the scale of the issue,\u201d explains\u00a0Jan Zrimec, first author of the study and former post-doc in Aleksej Zelezniak\u2019s group, now a researcher at the National Institute of Biology in Slovenia.<\/p>\n\n\n\n

Potential value for fighting the global plastic crisis<\/h3>\n\n\n\n

Every year around 8 million tonnes of plastic escapes into the world\u2019s oceans. The natural progresses for plastic degradation are very slow \u2013 the lifetime of a PET-bottle, for example, can be up to hundreds of years. The growth and accumulation of plastic waste in the oceans and on land is a truly global problem and there is an increasing need for solutions to manage this waste. The researchers believe that their results could potentially be used to discover and adapt enzymes for novel recycling processes.<\/p>\n\n\n\n

\u201cThe next step would be to test the most promising enzyme candidates in the lab to closely investigate their properties and the rate of plastic degradation they can achieve. From there you could engineer microbial communities with targeted degrading functions for specific polymer types,\u201d explains Aleksej Zelezniak.<\/p>\n\n\n\n

The article,\u00a0Plastic-Degrading Potential across the Global Microbiome Correlates with Recent Pollution Trends<\/a>, is published in the journal mBio. It was written by Jan Zrimec, Mariia Kokina, Sara Jonasson, Francisco Zorrilla and Aleksek Zelezniak.\u00a0<\/p>\n\n\n\n

Also interesting: <\/strong><\/em>Acetogenic bacteria as alternative to petroleum-based plastics<\/a><\/p>\n","protected":false},"author":2084,"featured_media":324209,"template":"","meta":{"_acf_changed":false,"advgb_blocks_editor_width":"","advgb_blocks_columns_visual_guide":""},"categories":[42],"tags":[48948,37688,34464,34870,20947,62084],"location":[54353],"internal_archives":[],"class_list":["post-324208","selected","type-selected","status-publish","has-post-thumbnail","hentry","category-sustainability-nl","tag-chalmers-university-of-technology","tag-enzymes","tag-plastic-reduction","tag-plastic-waste","tag-pollution","tag-recycling-waste-materials","location-sweden"],"blocksy_meta":[],"acf":[],"featured_img":"https:\/\/ioplus.nl\/archive\/wp-content\/uploads\/2022\/04\/rVoHXzpi-beach-gd87277413_1920-1.jpg","coauthors":[],"author_meta":{"author_link":"https:\/\/ioplus.nl\/archive\/author\/mauro-mereu\/","display_name":"Mauro Mereu"},"relative_dates":{"created":"Posted 4 years ago","modified":"Updated 4 years ago"},"absolute_dates":{"created":"Posted on December 14, 2021","modified":"Updated on December 14, 2021"},"absolute_dates_time":{"created":"Posted on December 14, 2021 12:30 pm","modified":"Updated on December 14, 2021 12:30 pm"},"featured_img_caption":"\u00a9 Pixabay","tax_additional":{"category":{"linked":["Sustainability<\/a>"],"unlinked":["Sustainability<\/span>"],"slug":"category","name":"Categories"},"post_tag":{"linked":["Chalmers University of Technology<\/a>","enzymes<\/a>","plastic reduction<\/a>","plastic waste<\/a>","pollution<\/a>","recycling waste materials<\/a>"],"unlinked":["Chalmers University of Technology<\/span>","enzymes<\/span>","plastic reduction<\/span>","plastic waste<\/span>","pollution<\/span>","recycling waste materials<\/span>"],"slug":"post_tag","name":"Tags"},"language":{"linked":["EN<\/a>"],"unlinked":["EN<\/span>"],"slug":"language","name":"Tags"},"post_translations":{"linked":[],"unlinked":[],"slug":"post_translations","name":""},"location":{"linked":["Sweden<\/a>"],"unlinked":["Sweden<\/span>"],"slug":"location","name":"Locations"},"internal_archives":{"linked":[],"unlinked":[],"slug":"internal_archives","name":"Internal Archives"}},"series_order":"","_links":{"self":[{"href":"https:\/\/ioplus.nl\/archive\/wp-json\/wp\/v2\/selected\/324208","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ioplus.nl\/archive\/wp-json\/wp\/v2\/selected"}],"about":[{"href":"https:\/\/ioplus.nl\/archive\/wp-json\/wp\/v2\/types\/selected"}],"author":[{"embeddable":true,"href":"https:\/\/ioplus.nl\/archive\/wp-json\/wp\/v2\/users\/2084"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ioplus.nl\/archive\/wp-json\/wp\/v2\/media\/324209"}],"wp:attachment":[{"href":"https:\/\/ioplus.nl\/archive\/wp-json\/wp\/v2\/media?parent=324208"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ioplus.nl\/archive\/wp-json\/wp\/v2\/categories?post=324208"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ioplus.nl\/archive\/wp-json\/wp\/v2\/tags?post=324208"},{"taxonomy":"location","embeddable":true,"href":"https:\/\/ioplus.nl\/archive\/wp-json\/wp\/v2\/location?post=324208"},{"taxonomy":"internal_archives","embeddable":true,"href":"https:\/\/ioplus.nl\/archive\/wp-json\/wp\/v2\/internal_archives?post=324208"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}