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the claim

Inorganic sulfate serves as the sulfur source in the biosynthesis of cysteine and methionine

the verdict
SUPPORTED
the evidence backs this
Recorded sources
3 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that inorganic sulfate serves as the sulfur source in the biosynthesis of cysteine and methionine?

Yes. Inorganic sulfate serves as the foundational sulfur source assimilated by plants, microbes, and fungi for the biosynthesis of the sulfur-containing amino acids cysteine and methionine.

Verdict: SUPPORTED · 3 sources for, 0 against · Last checked

The analysis

The retrieved literature consistently supports the fundamental biochemical pathway wherein organisms take up inorganic sulfate, assimilate and reduce it, and utilize it as the sulfur source to synthesize cysteine and methionine. Papers [0], [4], and [5] all discuss inorganic sulfate uptake and reduction to supply sulfur for sulfur amino acid biosynthesis.

Evidence for · 3
Redox regulation of enzymes involved in sulfate assimilation and in the synthesis of sulfur-containing amino acids and glutathione in plants
2022
This review highlights the sulfate assimilation pathway in plants, which reduces absorbed sulfate to synthesize cysteine, methionine, and other sulfur metabolites.
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Bont, L. d., Donnay, N., Couturier, J., & Rouhier, N. (2022). Redox regulation of enzymes involved in sulfate assimilation and in the synthesis of sulfur-containing amino acids and glutathione in plants. doi.org. https://doi.org/10.3389/fpls.2022.958490

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More for · 2
Co-Expression of Bacterial Aspartate Kinase and Adenylylsulfate Reductase Genes Substantially Increases Sulfur Amino Acid Levels in Transgenic Alfalfa (Medicago sativa L.)
2014
This study explains that adenylylsulfate reductase converts activated sulfate into sulfite, providing the reduced sulfur needed for the synthesis of cysteine and methionine in alfalfa.
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Tong, Z., Xie, C., Ma, L., Liu, L., Jin, Y., Dong, J., & Wang, T. (2014). Co-Expression of Bacterial Aspartate Kinase and Adenylylsulfate Reductase Genes Substantially Increases Sulfur Amino Acid Levels in Transgenic Alfalfa (Medicago sativa L.). doi.org. https://doi.org/10.1371/journal.pone.0088310

On the illusion of auxotrophy: met15Δ yeast cells can grow on inorganic sulfur, thanks to the previously uncharacterized homocysteine synthase Yll058w.
2022
This research discusses inorganic sulfur assimilation in yeast, noting how cells utilize inorganic sulfur sources for the biosynthesis of essential sulfur-containing compounds like methionine.
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SB, V. O., SB, P., N, C. C., A, W., I, B., S, Z., M, M., J, X., YP, K., NP, W., SJ, Y., KM, M., J, M., T, I., AP, V., GM, D., & AR, C. (2022). On the illusion of auxotrophy: met15Δ yeast cells can grow on inorganic sulfur, thanks to the previously uncharacterized homocysteine synthase Yll058w.. doi.org. https://doi.org/10.1016/j.jbc.2022.102697

Receipt History
first checked04 Aug 2026
judged → SUPPORTED · 8404 Aug 2026
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