September 20th, 2024

Understudied protein blobs have global effects on cell biochemistry

Recent research indicates that biological condensates significantly influence cellular biochemistry, modulating electrochemistry and antibiotic resistance, suggesting they play a crucial role in regulating biochemical processes and cellular interactions.

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Understudied protein blobs have global effects on cell biochemistry

Recent research from Duke University and Washington University in St. Louis has revealed that biological condensates—understudied protein structures within cells—have significant effects on cellular biochemistry beyond their immediate vicinity. These condensates, which form due to differences in density, can compartmentalize proteins and molecules, influencing their activity and providing alternative energy sources. The study, published in the journal Cell, demonstrates that these structures can modulate cellular electrochemistry, impacting the cellular membrane and global traits such as antibiotic resistance. Researchers found that condensate formation can alter the electrical charge of cellular membranes, affecting how cells respond to antibiotics. This discovery suggests that condensates may play a crucial role in regulating various biochemical processes and cellular behaviors, indicating a previously unrecognized mechanism of cellular interaction with the environment. The findings highlight the potential for further research into the diverse roles of biological condensates in cellular physiology.

- Biological condensates influence cellular biochemistry beyond their immediate area.

- They can modulate cellular electrochemistry and affect antibiotic resistance.

- The study suggests condensates may regulate various biochemical processes.

- The research opens avenues for understanding cellular interactions with the environment.

- Further exploration of condensates could reveal more about their role in cellular behaviors.

Link Icon 6 comments
By @ericdfoley - 7 months
Everything around the topic of condensates, liquid-liquid phase separation, stress granules, etc. is quite interesting. And it seems like the importance of condensates and related phenomena has only been really understood within the past decade or so.

Protein condensates also play a role in several neurodegenerative diseases like ALS. See e.g. https://www.frontiersin.org/journals/cellular-neuroscience/a....

By @w10-1 - 7 months
Paper title: Biomolecular condensates regulate cellular electrochemical equilibria

Summary of abstract: protein aggregates form electronegative buffer, with corresponding field extending to cell wall. Tested in e-coli: induced aggregates gave cell walls a negative charge, which reduced affinity to negatively-charged antibiotics.

No access to the article itself, but it's a long way from that to regulation or equilibria of any sort, so I'd be interested in reading it.

By @bbor - 7 months

  The results show that they may be a previously missing mechanism by which cells modulate their internal electrochemistry... "Our research shows that condensates influence cells well beyond direct physical contact, almost like they have a wireless connection to how cells interact with the environment,"
Wow. It looks like they're plentiful in the brain, too: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10102667/ This seems like a mechanism far more likely to be impactful than Penrose and Hammerhoff's quantum tomfoolery, but something tells me it'll get way less attention and take at least 2-5 years to get solid info on either way. Still exciting for all us brain fans out there! Who cares about saving people by enhancing antibiotics, if it regulates electrical potential then let's talk mind. Could these be the bits of a neuronal bite?
By @mncharity - 7 months
Just for fun context, E. coli cell membrane potential is interestingly dynamic. Some waste is charged, so rather than forcing it out against gradient, the whole-membrane gradient is dropped briefly for a dump. With a florescent probe for electrostatics, you see E. coli cells flickering like (inverse) fireflies, with little swirls of charged waste during the flick-offs.

And the difficulty of finding video of this to share with you, seems a not-small part of why science education content remains so dreadful.

By @mncharity - 7 months
I've wondered if compartmentalization could serve as a foundational cross-cutting theme to reimagine introductory biology. Multi-scale, from proximity-on-molecule to organisms to ecosystems. If you've seen anything like that, I'd appreciate a comment - tnx.
By @andrewflnr - 7 months
Dang, I thought maybe someone had figured out what the vault organelle[0] is for. Not too disappointed though, this still sounds crazy.

That said, did anyone else have a really hard time parsing this article?

[0] https://en.wikipedia.org/wiki/Vault_(organelle)