Gazzola RF, Sala R, Bussolati O, Visigalli R, Dall'Asta V, Ganapathy V, Gazzola GC. The adaptive regulation of amino acid transport system A is associated to changes in ATA2 expression.
FEBS Lett 2001;
490:11-4. [PMID:
11172802 DOI:
10.1016/s0014-5793(01)02126-3]
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Abstract
The activity of transport system A for neutral amino acids is adaptively stimulated upon amino acid starvation. In cultured human fibroblasts this treatment causes an increase in the expression of the ATA2 system A transporter gene. ATA2 mRNA increase and transport stimulation are suppressed by system A substrates, but they are unaffected by other amino acids. Supplementation of amino acid-starved cells with substrates of system A causes a decrease in both ATA2 mRNA and system A transport activity. These results suggest a direct relationship between ATA2 expression and system A transport activity.
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