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EC 2.7.1.164 Details

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EC number

2.7.1.164

Accepted name

O-phosphoseryl-tRNA^Sec kinase

Reaction

ATP + L-seryl-tRNA^Sec = ADP + O-phospho-L-seryl-tRNA^Sec

Other name(s)

PSTK, phosphoseryl-tRNA[Ser]Sec kinase, phosphoseryl-tRNA^Sec kinase

Systematic name

ATP:L-seryl-tRNA^Sec O-phosphotransferase

CAS registry number

91273-83-5

Comment

In archaea and eukarya selenocysteine formation is achieved by a two-step process: O-phosphoseryl-tRNA^Sec kinase (PSTK) phosphorylates the endogenous L-seryl-tRNA^Sec to O-phospho-L-seryl-tRNA^Sec, and then this misacylated amino acid-tRNA species is converted to L-selenocysteinyl-tRNA^Sec by EC 2.9.1.2 (Sep-tRNA:Sec-tRNA synthase).

History

created 2009

EC Tree

1 Oxidoreductases

1.1 Acting on the CH-OH group of donors

1.2 Acting on the aldehyde or oxo group of donors

1.3 Acting on the CH-CH group of donors

1.4 Acting on the CH-NH₂ group of donors

1.5 Acting on the CH-NH group of donors

1.6 Acting on NADH or NADPH

1.7 Acting on other nitrogenous compounds as donors

1.8 Acting on a sulfur group of donors

1.9 Acting on a heme group of donors

1.10 Acting on diphenols and related substances as donors

1.11 Acting on a peroxide as acceptor

1.12 Acting on hydrogen as donor

1.13 Acting on single donors with incorporation of molecular oxygen (oxygenases)

1.14 Acting on paired donors, with incorporation or reduction of molecular oxygen

1.15 Acting on superoxide as acceptor

1.16 Oxidizing metal ions

1.17 Acting on CH or CH₂ groups

1.18 Acting on iron-sulfur proteins as donors

1.19 Acting on reduced flavodoxin as donor

1.20 Acting on phosphorus or arsenic in donors

1.21 Catalysing the reaction X-H + Y-H = X-Y

1.21.1 With NAD⁺ or NADP⁺ as acceptor

1.21.3 With oxygen as acceptor

1.21.4 With a disulfide as acceptor

1.21.98 With other, known, physiological acceptors

1.21.99 With unknown physiological acceptors

1.22 Acting on halogen in donors

1.23 Reducing C-O-C group as acceptor

1.97 Other oxidoreductases

1.98 Enzymes using H₂ as reductant (deleted subclass)

1.99 Other enzymes using O₂ as oxidant (deleted subclass)

2 Transferases

3 Hydrolases

3.1 Acting on ester bonds

3.2 Glycosylases

3.3 Acting on ether bonds

3.4 Acting on peptide bonds (peptidases)

3.5 Acting on carbon-nitrogen bonds, other than peptide bonds

3.6 Acting on acid anhydrides

3.6.1 In phosphorus-containing anhydrides

3.6.2 In sulfonyl-containing anhydrides

3.6.3 Acting on acid anhydrides to catalyse transmembrane movement of substances

3.6.4 Acting on acid anhydrides to facilitate cellular and subcellular movement

3.6.4.1 myosin ATPase

3.6.4.2 dynein ATPase

3.6.4.3 microtubule-severing ATPase

3.6.4.4 plus-end-directed kinesin ATPase

3.6.4.5 minus-end-directed kinesin ATPase

3.6.4.6 vesicle-fusing ATPase

3.6.4.7 peroxisome-assembly ATPase

3.6.4.8 proteasome ATPase

3.6.4.9 chaperonin ATPase

3.6.4.10 non-chaperonin molecular chaperone ATPase

3.6.4.11 nucleoplasmin ATPase

3.6.4.12 DNA helicase

3.6.4.13 RNA helicase

3.6.5 Acting on GTP to facilitate cellular and subcellular movement

3.7 Acting on carbon-carbon bonds

3.8 Acting on halide bonds

3.9 Acting on phosphorus-nitrogen bonds

3.10 Acting on sulfur-nitrogen bonds

3.10.1 Acting on sulfur-nitrogen bonds (only sub-subclass identified to date)

3.11 Acting on carbon-phosphorus bonds

3.12 Acting on sulfur-sulfur bonds

3.13 Acting on carbon-sulfur bonds