#Buchnera
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nancy-moran.bsky.social
A step forward in discovering Buchnera's key to the aphid's heart, published today! Thanks to Jerry Maeda and other authors--a great team -- and to the helpful reviewers #SymbioSky

doi: doi.org/10.1038/s415...
A secreted endosymbiont protein essential for colonizing host cells - Nature
SyeA was present in the Buchnera ancestor, is secreted into the host cytoplasm, is homologous to secreted effectors of bacterial pathogens and is essential for Buchnera transmission.
doi.org
July 1, 2026 at 11:35 PM
plazi-species.bsky.social
#NewSpecies!
Buchnera kisimbai
A newly discovered orobanchaceae from #drcongo!

Treatment: treatment.plazi.org/id/03EE87A1-...
Publication: doi.org/10.11646/phy...
#Phytotaxa #BuchneraKisimbai

#FAIRdata
#OA #biology #ecology #nature #biodiversity #botany #wildflowers #flowers #plants #orobanchaceae
Buchnera kisimbai, inflorescence.
September 26, 2025 at 11:04 AM
nature.com
Nature research paper: A secreted endosymbiont protein essential for colonizing host cells

go.nature.com/4f0pqJt
A secreted endosymbiont protein essential for colonizing host cells - Nature
SyeA was present in the Buchnera ancestor, is secreted into the host cytoplasm, is homologous to secreted effectors of bacterial pathogens and is essential for Buchnera transmission.
go.nature.com
July 6, 2026 at 8:21 AM
kampamycin.bsky.social
I've been working to visualize the biogeography of the aphid's intracellular symbiont within whole insects. The pink bacteria live in the host's specialized bacteriocytes and embryos. Really excited about where this work is going! #FluorescenceFriday
A large green aphid fills the whole screen. Magenta splotches of the symbiont Buchnera are in the posterior end of the aphid
April 10, 2026 at 5:51 PM
amanzanom.bsky.social
This is a really cool study on one of my favourite obligate symbiotic systems: Aphid + Buchnera by @jerrymaeda.bsky.social, @nancy-moran.bsky.social, & co.

A secreted #endosymbiont protein (SyeA, formally Yba3) essential for colonizing host cells

doi.org/10.1101/2025...

#SymbioSky
January 30, 2026 at 11:28 AM
kampamycin.bsky.social
Really grateful to have gotten to be a part of this paper just as my post doc started. Really neat stuff!

A secreted endosymbiont protein essential for colonizing host cells

www.nature.com/articles/s41...
A secreted endosymbiont protein essential for colonizing host cells - Nature
SyeA was present in the Buchnera ancestor, is secreted into the host cytoplasm, is homologous to secreted effectors of bacterial pathogens and is essential for Buchnera transmission.
www.nature.com
July 1, 2026 at 5:09 PM
pacyc184.bsky.social
A secreted endosymbiont protein essential for colonizing host cells | Nature
A secreted endosymbiont protein essential for colonizing host cells - Nature
SyeA was present in the Buchnera ancestor, is secreted into the host cytoplasm, is homologous to secreted effectors of bacterial pathogens and is essential for Buchnera transmission.
www.nature.com
July 1, 2026 at 10:38 PM
evgenii-protasov.bsky.social
A secreted endosymbiont protein essential for colonizing host cells
#microbiology #insects #endosymbiosis #MicroSky
@nature.com
www.nature.com/articles/s41...
A secreted endosymbiont protein essential for colonizing host cells - Nature
SyeA was present in the Buchnera ancestor, is secreted into the host cytoplasm, is homologous to secreted effectors of bacterial pathogens and is essential for Buchnera transmission.
www.nature.com
July 6, 2026 at 5:22 PM
isamack.bsky.social
Buchnera and Aphids
#Pint25 #PintOfScience #PintNewcastle @pintofscience.uk @pintsworld.bsky.social
May 20, 2025 at 6:46 PM
c0nc0rdance.bsky.social
They're so interdependent with the aphid that they've lost the ability to make a functional cell membrane without help & have genomes 1/6th the size of their free-living cousins.

Source: https://www.researchgate.net/publication/229085538_Genome_Sequence_of_the_Pea_Aphid_Acyrthosiphon_pisum
Diagram showing the location of aphid cells and buchnera cells.
August 15, 2023 at 1:24 PM
francesari.bsky.social
A new study in Nature describes an ancient, secreted effector in Buchnera, an obligate bacterial endosymbiont of aphids, that is required for host embryo colonization, providing rare insights into how endosymbionts establishes and maintains their intracellular niche.🧪
www.nature.com/articles/s41...
A secreted endosymbiont protein essential for colonizing host cells - Nature
SyeA was present in the Buchnera ancestor, is secreted into the host cytoplasm, is homologous to secreted effectors of bacterial pathogens and is essential for Buchnera transmission.
www.nature.com
July 3, 2026 at 2:12 PM
t3sss.bsky.social
A secreted endosymbiont protein essential for colonizing host cells
www.nature.com/articles/s41...
A secreted endosymbiont protein essential for colonizing host cells - Nature
SyeA was present in the Buchnera ancestor, is secreted into the host cytoplasm, is homologous to secreted effectors of bacterial pathogens and is essential for Buchnera transmission.
www.nature.com
July 1, 2026 at 11:51 PM
kurianlab.bsky.social
www.nature.com/articles/s41...

🤯
A secreted endosymbiont protein essential for colonizing host cells - Nature
SyeA was present in the Buchnera ancestor, is secreted into the host cytoplasm, is homologous to secreted effectors of bacterial pathogens and is essential for Buchnera transmission.
www.nature.com
July 7, 2026 at 6:16 AM
insect-science.bsky.social
Aphid and endosymbiont sensitivity to heatwaves is misaligned across life stages #Openaccess #Aphid #endosymbiont
onlinelibrary.wiley.com/doi/10.1111/...
Aphid and endosymbiont sensitivity to heatwaves is misaligned across life stages
Aphids depend on the obligate symbiont Buchnera aphidicola, which may constrain thermal tolerance. Using a factorial heatwave experiment, we exposed nymphs and adults to moderate or extreme temperatu...
onlinelibrary.wiley.com
September 23, 2026 at 12:11 AM
stcmicrobeblog.bsky.social
read more about Buchnera, the bacteria aphids cannot do without 👉 https://schaechter.asmblog.org/schaechter/2015/11/symbiont-exchange-in-the-aphidbuchnera-symbiosis-part-1.html
August 15, 2023 at 4:24 PM
amanzanom.bsky.social
.. And no evidence of relaxed selection on protein-coding genes shared between Buchnera and Serratia, suggesting that the presence of Serratia does not exacerbate genome erosion in Buchnera even on redundant metabolic genes! ...
May 18, 2026 at 9:08 AM
metalichen.bsky.social
Next, @nancy-moran.bsky.social on the interaction between Buchnera and its aphid host. SyeA, an effector predicted to interact with Rho1 GTPase, is secreted during the host colonization. Knocking it down disrupts the aphid's embryo development
More here: www.biorxiv.org/content/10.1... #EESSymbiosis
www.biorxiv.org
March 20, 2026 at 9:58 AM
inrae-umr-bf2i.bsky.social
📣 #OurLastPaper is out! A quantitative metabolic model of the obligate #aphid symbiont, #Buchnera aphidicola. This work also provides a model of the life stage-specific provision of nutrients from the bacterium to the host. #SymbioSky
www.sciencedirect.com/science/arti...
Quantifying supply and demand in the pea aphid-Buchnera symbiosis reveals the metabolic Achilles’ heels of this interaction
Many herbivorous insects feed on unbalanced diets and rely on bacterial endosymbionts to meet all their nutritional needs. This is the case for the pe…
www.sciencedirect.com
August 18, 2025 at 7:45 AM
bstevensonlab.bsky.social
A secreted Buchnera endosymbiont protein essential for colonizing host cells

#MicroSky
July 2, 2026 at 12:36 AM
cyrilpedia.bsky.social
"Here, we reported that a complete DNA repair system assembled by components from Buchnera and Serratia, two endosymbionts of aphids, could ensure the genome integrity of Buchnera, and thereby enhanced thermostability of aphid bacteriocytes"

www.pnas.org/doi/10.1073/...
www.pnas.org
December 11, 2024 at 9:38 AM
amanzanom.bsky.social
Yba3 (sorry, SyeA) was one of those enigmatic Buchnera proteins: (almost) always there, but who knows what it did.... Now we know! SyeA is "secreted and homologous to secreted effectors of bacterial pathogens AND is essential for Buchnera transmission"!

Really cool work!

(image: Ext. Data Fig 2.)
January 30, 2026 at 11:28 AM
lost-in-botany.bsky.social
finally came across a native WA #Orobanchaceae! #Buchnera ramosissima or linearis! Very exciting! Not much info on these plants, but growing in close proximity to grass I’m guessing that must be a preference! Other species tho are known to parasitise trees, but these species can live independently
May 30, 2025 at 12:49 AM
liamtaylor.bsky.social
Awesome

www.nature.com/articles/s41...
A secreted endosymbiont protein essential for colonizing host cells - Nature
SyeA was present in the Buchnera ancestor, is secreted into the host cytoplasm, is homologous to secreted effectors of bacterial pathogens and is essential for Buchnera transmission.
www.nature.com
July 2, 2026 at 4:44 PM
thepurplepiper.bsky.social
Source: Nature
share.google/LTQotonLLcjs...
A secreted endosymbiont protein essential for colonizing host cells - Nature
SyeA was present in the Buchnera ancestor, is secreted into the host cytoplasm, is homologous to secreted effectors of bacterial pathogens and is essential for Buchnera transmission.
share.google
July 1, 2026 at 6:58 PM
c0nc0rdance.bsky.social
They have one job: taking plant sap the aphid ingests & converting non-essential amino acids into 9 amino acids the aphid needs to survive (but cannot synthesize).

There's evidence genes necessary to do this conversion were captured from a FUNGUS this BACTERIA also infected!
From: https://www.pnas.org/doi/10.1073/pnas.1906223116 More detailed schematic representation of the putative steps in NEAA and EAA transport across the aphid/Buchnera symbiotic boundary. The only identified amino acid transporter to date is the glutamine-selective ApGLNT1, which is localized in the bacteriocyte membrane (28). Much of the glutamine taken into the bacteriocyte is converted into glutamate, which can either be transported across the symbiosomal membrane or converted by bacteriocyte enzymes into NEAAs. The NEAAs must cross the symbiosomal membrane to be utilized by Buchnera and in the Buchnera-mediated production of other NEAAs, EAAs, or EAA precursors (pre-EAA), all of which can exit across the symbiosomal membrane back into the bacteriocyte cytosol. SS, symbiosomal space. More detailed schematic representation of the putative steps in NEAA and EAA transport across the aphid/Buchnera symbiotic boundary. The only identified amino acid transporter to date is the glutamine
August 15, 2023 at 1:26 PM