[HN Gopher] Scientists Produce Powerhouse Pigment Behind Octopus...
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       Scientists Produce Powerhouse Pigment Behind Octopus Camouflage
        
       Author : gmays
       Score  : 69 points
       Date   : 2025-11-10 03:29 UTC (4 days ago)
        
 (HTM) web link (today.ucsd.edu)
 (TXT) w3m dump (today.ucsd.edu)
        
       | quitit wrote:
       | >The study authors said their discovery is significant, not just
       | for understanding this unique pigment -- which sheds light into
       | the biology and chemistry of the animal kingdom -- but also
       | because the technique they used could be applied to many other
       | chemicals, potentially helping industries move away from fossil
       | fuel-based materials toward nature-based alternatives.
       | 
       | That's a huge outcome.
        
         | HK-NC wrote:
         | Anything that replaces the hormone wrecking wonder waste
         | product we have everywhere is a win. Its just hard to beat the
         | price in a world where money is most important.
        
       | canadiantim wrote:
       | Pretty amazing technique. I think that's the biggest breakthrough
       | here. They figured out how to much more effectively enable the
       | production of biomolecules from bacteria or other living cells by
       | linking their production to the cell's survival. This technique
       | will most certainly be of keen and immediate interest to so many
       | groups around the world. Key section:
       | 
       | > Typically, when researchers try to get a microbe to produce a
       | foreign compound, it creates a major metabolic burden. Without
       | significant genetic manipulation, the microbe resists diverting
       | its essential resources to produce something unfamiliar.
       | 
       | > By linking the cell's survival to the production of their
       | target compound, the team was able to trick the microbe into
       | creating xanthommatin. To do this, they started with a
       | genetically engineered "sick" cell, one that could only survive
       | if it produced both the desired pigment, along with a second
       | chemical called formic acid. For every molecule of pigment
       | generated, the cell also produced one molecule of formic acid.
       | The formic acid, in turn, provides fuel for the cell's growth,
       | creating a self-sustaining loop that drives pigment production.
       | 
       | > "We made it such that activity through this pathway, of making
       | the compound of interest, is absolutely essential for life. If
       | the organism doesn't make xanthommatin, it won't grow," said
       | Bushin.
        
         | bonsai_spool wrote:
         | > Pretty amazing technique. I think that's the biggest
         | breakthrough here.
         | 
         | This is a standard approach in molecular biology. Here is the
         | paper:
         | 
         | https://www.nature.com/articles/s41587-025-02867-7
         | 
         | Here is an explainer of this very typical technique:
         | https://www.khanacademy.org/science/biology/biotech-dna-tech...
         | and something more detailed: https://www.neb.com/en-us/tools-
         | and-resources/feature-articl...
         | 
         | The insight they had was to link part of the desired
         | biosynthetic pathway to the cells pathway (but they don't
         | explicitly show that this had been necessary EDIT - Fig 3f
         | shows a 45X increase with their strategy over a similar
         | strategy; however, it's not clear that their 'control' was the
         | optimal strategy).
         | 
         | relevant figure:
         | https://www.nature.com/articles/s41587-025-02867-7/figures/1
        
       | ChrisMarshallNY wrote:
       | Very cool. The story is really about how they get the pigment, as
       | opposed to the pigment, itself.
       | 
       | Could have some interesting applications.
       | 
       |  _> natural sunscreens_
       | 
       | That could make Beach Day interesting.
        
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       (page generated 2025-11-14 23:01 UTC)