Solution structure of acyl carrier protein from <i>Nitrosomonas europaea</i>
Bibliographic record
Abstract
Here, we report the solution structure of Q82SY3 from Nitrosomonas europaea. N. europaea is a Gram-negative bacterium with the interesting capability to derive all its energy from oxidation of ammonia to nitrite. It lives in several places such as soil, sewage, fresh water, walls of buildings, and on the surface of monuments, especially in polluted areas where air contains high levels of nitrogen compounds. N. europaea and other ammonia-oxidizing bacteria play a very crucial role in the biogeochemical nitrogen fixing cycle, that is, biological conversion of reduced nitrogen in the form of ammonia or ammonium to oxidized nitrogen in the form of nitrite, nitrate, or gaseous forms (NO, N 2 O), which in turn, enhances nitrogen availability to plants and waste water 1 treatment. We believe Q82SY3 is likely to be an acyl carrier protein (ACP) based on its structural similarity with such proteins from other organisms such as Escherichia coli and the presence of a conserved "DS" motif. In Figure ACP is a small protein family involved in fatty acid biosynthesis. ACP is a cytosolic transport protein that carries fatty acid via thioester linkage facilitated by the conserved serine residue for chain elongation by fatty acid synthase system. In addition to its function as a carrier protein, ACP could also modulate activities of the enzymatic system involved in fatty acid synthesis. Evidence suggests that substituting ACP from one organism to another yields significant variation in the fatty acid distribution. Involvement of ACPs in fatty acid biosynthesis and antibiotic biosynthesis warrants the study of the structure-function relationships of this class of proteins.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.001 | 0.001 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".