David Fewer @FewerLab
News from our lab. We study toxic cyanobacteria, water quality, secondary metabolism and microbial bioinformatics. Posts by lab members. Led by @david_fewer University of Helsinki Joined November 2021-
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Bacteria can make extracellular polysaccharides that mediate heavy metal removal. This exopolysaccharide-producing cyanobacterium turned a 40-ml liquid culture into a gel. #UHCCCultureCollection
Oldest direct evidence for oxygenic photosynthesis in cyanobacteria fossils from around 1.75 billion years ago
Oldest direct evidence for oxygenic photosynthesis in cyanobacteria fossils from around 1.75 billion years ago
Our paper describing the isolation of a toxic strain of cyanobacteria from a microbial mat in the Helsinki coast of the Baltic Sea sciencedirect.com/science/articl…
The cyanobacterium Aetokthonos hydrillicola really is nasty, as we show in the most recent @PNASNews cover story (pnas.org/doi/10.1073/pn…). A thread… 1/
Campaigners have held a wake on the shores of Lough Neagh to mourn what they say is the death of the largest freshwater lake in Ireland and the UK. The lough is heavily polluted with toxic blue-green algae | rte.ie/b/1405756
Sila's paper on an unusual branched biosynthetic pathway for the production of microbial sunscreens out now in ACS Chemical Biology pubs.acs.org/doi/10.1021/ac…
Our latest paper on the isolation of a toxin-producing cyanobacterium from an algal mat on the Helsinki coast of the Baltic Sea sciencedirect.com/science/articl…
Kuuman alkukesän seurauksena sinilevähavaintoja tehtiin runsaasti. Vaikka heinäkuu alkoikin viilenevän kesäsään merkeissä, runsaat sateet voivat lisätä vesistöihin valuvaa ravinnekuormaa ja siten edistää sinileväkukintojen runsastumista. wwf.fi/uutiset/2023/0…
Photo of a foliose tripartite lichen (Peltigera) that keeps cyanobacteria (Nostoc) as a nitrogen-fixing partner in black bodies called cephalodia. These cyanobacteria can produce toxins while in symbiosis or grown in pure culture. doi.org/10.1073/pnas.1…
Our alga of the week from the@CCACof is #CCAC 3369 B Spirulina sp. Class: #Cyanophyceae Order: Spirulinales Family: Spirulinaceae #Algensammlung #algae #microalgae #ude #Cyanobakterien #Blaualgen #cyanobacteria #algaoftheweek
Domoic acid event along the coast is having a significant effect on the health of marine mammals 💔 via @nytimes nytimes.com/2023/06/21/us/…
Xiaodan Ouyang (@XiaodanOuyang) presenting her paper on the direct pathway cloning and expression of radiosumin biosynthetic pathway at the Nordic Natural Products conference today. Well done Xiaodan! doi.org/10.5281/zenodo… #ChinaScholarshipCouncil
Spirulina grows on rocks and boulders in the #BalticSea. These cyanobacteria can adapt their light harvesting apparatus to dim light using different pigments. Photos by Annica Långnabba (Metsähallitus) and @inkeri_vuori #MicroscopyMonday @VELMUohjelma @NesslingSaatio
Congratulations to @XiaodanOuyang on her article in Organic and Biomolecular Chemistry! A big thanks to all co-authors. We report the radiosumin biosynthetic pathway and show that this small molecule is a human trypsin inhibitor. doi.org/10.1039/D3OB00… #Nordaqua #mmtdk
Trichodesmium forms blooms in tropical and subtropical oceans where they are important source of new nitrogen. Sailors have referred to the blooms as sea sawdust since the 1700s. This study in Science resolves how motile filaments form colonies under stress conditions.
Trichodesmium forms blooms in tropical and subtropical oceans where they are important source of new nitrogen. Sailors have referred to the blooms as sea sawdust since the 1700s. This study in Science resolves how motile filaments form colonies under stress conditions.
A thick mat of Oscillatoria covering rocks from Laajalahti bay on the Helsinki coast. Photosynthetic cyanobacteria can provide a substrate for a rich community of heterotrophic bacteria. Photos by @inkeri_vuori #BalticSea #MicroscopyMonday
The amount of water stored in more than half of the largest lakes and reservoirs worldwide is declining, a new Science study finds. The results underscore the importance of better water management to protect essential ecosystem services. scim.ag/2Jx
Check it out! #CyanoMetDB v02 is now available. This public database includes comprehensive chemoinformatic metadata for 2425 toxins and secondary metabolites from cyanobacteria. Congratulations to @JanssenLilli and contributors for all the handwork!

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