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CT domains found N-terminal of phosphoserine phosphatase (PSP, SerB) The ACT_PSP_1 CD includes the first of the two ACT domains found N-terminal of phosphoserine phosphatase (PSP, SerB). PSPs belong to the L-2-haloacid dehalogenase-like protein superfamily. PSP is involved in serine metabolism; serine is synthesized from phosphoglycerate through sequential reactions catalyzed by 3-phosphoglycerate dehydrogenase (SerA), 3-phosphoserine aminotransferase (SerC), and SerB. Members of this CD belong to the superfamily of ACT regulatory domains.
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