#carboxylases
Join the Phys Ecophys or if you like acronyms the PEP section (we love our carboxylases) tonight at the All Society Mixer. #Botany2026 Find us by the tables near LICOR and the DEI tables!
August 3, 2026 at 1:44 AM
March Molecule of the Month: Enoyl-CoA Carboxylases/Reductases
Enzymes that can quickly and efficiently fix carbon
pdb101.rcsb.org/motm...
PDB101: Molecule of the Month: Enoyl-CoA Carboxylases/Reductases
Enzymes that can quickly and efficiently fix carbon
pdb101.rcsb.org
March 3, 2025 at 5:34 PM
Carboxylases are the best 🥰
New lab preprint!
@zestytoast.bsky.social tagged a scarce mycobacterial protein in M. smegmatis with TwinStep but got… something? @kjamali.bsky.social's ModelAngelo built models & @martinsteinegger.bsky.social's FoldSeek IDed them as the biotin-containing MCC & LCC complexes
🧵
tinyurl.com/ukny4ptz
October 31, 2025 at 7:14 AM
Enoyl-CoA Carboxylases/Reductases are enzymes that can quickly and efficiently fix carbon
What accounts for the impressive speed and efficiency of ECRs in carbon fixation? Watch the Molecule of the Month animation at PDB-101 to learn more: pdb101.rcsb.org/motm...
March 20, 2025 at 6:26 PM
Last Summer, we published a paper on CO2-converting enzymes that included carbonic anhydrase. It has been cited fives times, which is okay.
doi.org/10.1039/D3SC...
Infrared spectroscopy reveals metal-independent carbonic anhydrase activity in crotonyl-CoA carboxylase/reductase
The conversion of CO2 by enzymes such as carbonic anhydrase or carboxylases plays a crucial role in many biological processes. However, in situ methods following the microscopic details of CO2 convers...
doi.org
March 4, 2025 at 7:31 PM
🧲 Les énoyl-CoA carboxylases/réductases sont des enzymes capables de fixer rapidement et efficacement le carbone
La molécule du mois : les énoyl-CoA carboxylases/réductases
Les énoyl-CoA carboxylases/réductases sont des enzymes capables de fixer rapidement et efficacement le carbone.
buff.ly
December 4, 2025 at 5:30 PM
Really nice work. We solved an sf9 version of this a couple of years ago, though it appeared to be truncated. Recently another group published an identical structure. Seems to be a common contaminant when using strep-pulldown. www.jbc.org/article/S002...
Structure of the endogenous insect acetyl-coA carboxylase carboxyltransferase domain
Acetyl-coenzyme A carboxylases (ACCs) are pivotal in fatty acid metabolism, converting acetyl-CoA to malonyl-CoA. While ACCs in humans, plants, and microbes have been extensively studied, insect ACCs,...
www.jbc.org
October 30, 2025 at 6:56 AM
New carboxylases (and new pathway reactions) expand the possibilities for alternative carbon fixation cycles. Amazing work from the Claassens lab!! (Vittorio in particular, this is a huge body of work).
This changes my assumptions around what can be expected from future new cycles. ♻️
Newest preprint from our lab: a new family of promising synthetic CO2 fixation cycles that may outcompete the Calvin cycle and that Vittorio Rainaldi realized to a great extent in E. coli! Up to 11 heterologous enzymes in a cascade supporting CO2 fixation & growth! www.biorxiv.org/content/10.1...
Modular in vivo engineering of the reductive methylaspartate cycles for synthetic CO2 fixation
Biological carbon fixation is currently limited to seven naturally occurring pathways. Synthetic carbon fixation pathways have the potential to surpass aerobic natural pathways in efficiency, but none...
www.biorxiv.org
November 26, 2025 at 7:14 AM
Were those 200 proteins biotinylated as expected?? If yes, troubles with pulldown specificity might not be an issue.. The presence of natively biotinylated proteins can also be used for QC.. Ideally, those carboxylases should be one among the abundant proteins..
January 11, 2025 at 10:06 PM
炭素固定を高速で効率的に行う酵素 303: エノイルCoAカルボキシラーゼ/還元酵素 numon.pdbj.org/mom/303?l=ja #PDB #炭素固定 #CarbonFixation
エノイルCoAカルボキシラーゼ/還元酵素 (Enoyl-CoA Carboxylases/Reductases) | 今月の分子 | PDBj 入門
炭素固定を高速で効率的に行う酵素
numon.pdbj.org
March 1, 2025 at 11:27 PM
pmc.ncbi.nlm.nih.gov/articles/PMC...

"- Inhibitors of the vesicular monoamine transporter 2 (VMAT2) mimic the effect of biotin deficiency. In biotin‐deficient animals, VMAT2 protein expression decreases in parallel with biotin depletion in CB cells."
Selective accumulation of biotin in arterial chemoreceptors: requirement for carotid body exocytotic dopamine secretion
Biotin, a vitamin whose main role is as a coenzyme for carboxylases, accumulates at unusually large amounts within cells of the carotid body (CB). In biotin‐deficient rats biotin rapidly disappears fr...
pmc.ncbi.nlm.nih.gov
September 11, 2025 at 5:57 PM
Rubisco is better than good. it's nearly perfect

(Ron Milo is not the target of my Rubisco ire.)

(it's Dan Nocera)
November 21, 2025 at 5:12 PM
The next episode of “Who Is Who of Enzymes”, about #carboxylases and #decarboxylases, is online. Applause goes to #elkcrew member Emmanuel. Thanks also to Jörg who does the post-production of the #elktalks and to @luminous_lab who contributed the intro.
https://youtu.be/DZQ6QOksmUM
May 6, 2025 at 12:49 PM
How do mycobacteria assemble a highly impermeable outer cell envelope?

The group of Sebastian Geibel has elucidated the structure of two long-chain acyl-CoA carboxylases that are key to mycolic acid and complex lipid biosynthesis.
www.biorxiv.org/content/10.6...
#DrugDiscovery #cryoEM #Tuberculosis
February 17, 2026 at 2:34 PM
Sample optimizations to enable the structure determination of biotin-dependent carboxylases pubmed.ncbi.nlm.nih.gov/39572145/
November 22, 2024 at 9:58 PM
Purification of heteromeric acetyl-CoA carboxylases from Escherichia coli for structure solution pubmed.ncbi.nlm.nih.gov/39572149/
November 22, 2024 at 7:40 PM
There are a bunch of carboxylases which are naturally biotinylated and get copurified in streptavidin affinity pulldowns..
March 18, 2026 at 8:33 AM
Filament structures unveil the dynamic organization of human acetyl-CoA 1 carboxylase https://www.biorxiv.org/content/10.1101/2024.06.16.599241v1
Filament structures unveil the dynamic organization of human acetyl-CoA 1 carboxylase https://www.biorxiv.org/content/10.1101/2024.06.16.599241v1
Human acetyl-CoA carboxylases (ACCs) catalyze the carboxylation of acetyl-CoA, which is the rate-lim
www.biorxiv.org
June 17, 2024 at 10:45 PM
Very little biotinylation in the 200 proteins. Unfortunately can't use carboxylases as a benchmark, my probe has extra mass from its reactive moiety + linker. My only benchmark is a protein with established precedent for being tagged by my probe, which was missing from the datasets with lower # IDs.
January 11, 2025 at 10:28 PM
pmc.ncbi.nlm.nih.gov/articles/PMC...

"- These data suggest that dopamine transport and/or storage in small secretory granules in glomus cells depend on biotin."
Selective accumulation of biotin in arterial chemoreceptors: requirement for carotid body exocytotic dopamine secretion
Biotin, a vitamin whose main role is as a coenzyme for carboxylases, accumulates at unusually large amounts within cells of the carotid body (CB). In biotin‐deficient rats biotin rapidly disappears fr...
pmc.ncbi.nlm.nih.gov
September 11, 2025 at 5:57 PM
pmc.ncbi.nlm.nih.gov/articles/PMC...

"- Animals with biotin deficiency exhibit pronounced metabolic lactic acidosis. Remarkably, glomus cells from these animals have normal electrical and neurochemical properties. ... they show a marked decrease in the size of quantal dopaminergic secretory events"
Selective accumulation of biotin in arterial chemoreceptors: requirement for carotid body exocytotic dopamine secretion
Biotin, a vitamin whose main role is as a coenzyme for carboxylases, accumulates at unusually large amounts within cells of the carotid body (CB). In biotin‐deficient rats biotin rapidly disappears fr...
pmc.ncbi.nlm.nih.gov
September 11, 2025 at 5:57 PM
pmc.ncbi.nlm.nih.gov/articles/PMC...

"- In biotin‐deficient rats biotin rapidly disappears from the blood; however, it remains at relatively high levels in CB glomus cells. The CB contains high levels of mRNA for SLC5a6, a biotin transporter, and SLC19a3, a thiamine transporter regulated by biotin"
Selective accumulation of biotin in arterial chemoreceptors: requirement for carotid body exocytotic dopamine secretion
Biotin, a vitamin whose main role is as a coenzyme for carboxylases, accumulates at unusually large amounts within cells of the carotid body (CB). In biotin‐deficient rats biotin rapidly disappears fr...
pmc.ncbi.nlm.nih.gov
September 11, 2025 at 5:57 PM