Claim · model-written summary
SAT expression increased free cysteine up to 26-fold in developing lupin embryos.
- Taxon
- narrow leaf lupint0
- Organ / stage
- developing lupin embryose0
- Gene
- serine acetyltransferase (SAT)e0
- Outcome
- free cysteinee0
- Direction
- increasese0
- Value
- up to 26-folde0
Not reportedMaterialCompoundInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingQualifier
Verbatim
e0“Expression in developing lupin embryos of a serine acetyltransferase (SAT) from Arabidopsis thaliana (AtSAT1 or AtSerat 2;1) was associated with increases of up to 5-fold in the concentrations of O-acetylserine (OAS), the immediate product of SAT, and up to 26-fold in free cysteine”
t0“narrow leaf lupin (Lupinus angustifolius, L.)”
Title
L. Tabe; M. Wirtz; L. Molvig; et al. Journal of Experimental Botany 2009. doi:10.1093/jxb/erp338
Other claims from this paper (10)
- Association SAT expression increased OAS concentration up to fivefold in developing lupin embryos.
- Association Free methionine in developing embryos was not significantly altered in SAT overexpressers.
- Association Total cysteine and methionine concentrations in mature seeds were not significantly altered.
- Association Segregating F2 seeds with SAT and storage protein transgenes had increased OAS during development.
- Association The same segregating seeds had increased free cysteine during development.
- Association The segregating seeds did not show increased free methionine during development.
- Association The segregating seeds had no increase in mature seed total sulfur amino acids relative to controls lacking SAT overexpression.
- Mechanism The authors infer that SAT activity limits cysteine biosynthesis in developing seeds.
- Mechanism The authors infer that cysteine supply does not limit methionine or storage protein synthesis under adequate sulfur nutrition.
- Mechanism OAS and free methionine, but not free cysteine, were implicated in regulation of a cysteine rich storage protein gene.