Sufate is first activated by adding it to ATP, giving APS. Although both sulfate adenylyltransferase and APS kinase activities reside in the same enzyme complex, the intermediate APS is not channeled within the complex. Its accessibility ensures the functionality of the cysteine biosynthetic pathway (Pinto et al, 2004; Sun et al, 2005).
Liu, S, Triccas, JA, Leyh, TS, Andreassi JL, 2nd, Pinto, R, Sun, M
Tang, QX, Britton, WJ, Triccas, JA, Leyh, TS, Pinto, R
sulfate adenylyltransferase (ATP) activity of sulfate adenylyltransferase complex [cytosol]
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