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| N Use By Plants |
| Nitrate Assimilation |
| Ammonia Assimilation |
| Glu, Gln, Asn, Gly, Ser |
| Aminotransferases |
| Asp, Ala, GABA |
| Val, Leu, Ileu, Thr, Lys |
| Pro, Arg, Orn |
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| Sulfate Assimilation |
| Cys, Met, AdoMet, ACC |
| His, Phe, Tyr, Tryp |
| Secondary Products |
| Onium Compounds |
| Enzymes |
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| Simulation |
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HORT640 - Metabolic Plant Physiology
Sulfate uptake and assimilation
S-Methylmethionine (SMM)
AdoMet: methionine S-methyltransferase [EC 2.1.1.12]
AdoMet (SAM) + methionine ---> S-methylmethionine (SMM) + AdoHcy
S-Methyl-L-methionine: homocysteine S-methyltransferase [EC 2.1.1.10]
S-methylmethionine (SMM) + homocysteine ---> 2 methionine + H+
S-Methyl-L-methionine hydrolase [EC 3.3.1.2]
S-methylmethionine (SMM) + H2O ---> (CH3)2S + homoserine + H+
(from: Giovanelli et al, 1980)
References
Giovanelli J, Mudd SH, Datko AH 1980 Sulfur amino acids in plants. In (BJ Miflin ed) "The Biochemistry of Plants", Vol 5, Academic Press, New York, pp. 453-505.
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David Rhodes
Department of Horticulture & Landscape Architecture
Horticulture Building
625 Agriculture Mall Drive
Purdue University
West Lafayette, IN 47907-2010
Last Update: 10/01/09
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