Reaction: ATP + L-seryl-tRNASec = ADP + O-phospho-L-seryl-tRNASec
Other name(s): PSTK; phosphoseryl-tRNA[Ser]Sec kinase; phosphoseryl-tRNASec kinase
Systematic name: ATP:L-seryl-tRNASec O-phosphotransferase
Comments: In archaea and eukarya selenocysteine formation is achieved by a two-step process: O-phosphoseryl-tRNASec kinase (PSTK) phosphorylates the endogenous L-seryl-tRNASec to O-phospho-L-seryl-tRNASec, and then this misacylated amino acid-tRNA species is converted to L-selenocysteinyl-tRNASec by EC 18.104.22.168 (Sep-tRNA:Sec-tRNA synthase).
Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, PDB, CAS registry number: 91273-83-5
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2. Sherrer, R.L., O'Donoghue, P. and Soll, D. Characterization and evolutionary history of an archaeal kinase involved in selenocysteinyl-tRNA formation. Nucleic Acids Res. 36 (2008) 1187-1199. [PMID: 18174226]
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