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EC 3.6.3.44 Details
EC number
3.6.3.44
Accepted name
xenobiotic-transporting ATPase
Reaction
ATP + H2O + xenobioticin = ADP + phosphate + xenobioticout
Other name(s)
multidrug-resistance protein, MDR protein, P-glycoprotein, pleiotropic-drug-resistance protein, PDR protein, steroid-transporting ATPase, ATP phosphohydrolase (steroid-exporting)
Systematic name
ATP phosphohydrolase (xenobiotic-exporting)
Comment
ABC-type (ATP-binding cassette-type) ATPase, characterized by the presence of two similar ATP-binding domains. Does not undergo phosphorylation during the transport process. The enzyme from Gram-positive bacteria and eukaryotic cells export a number of drugs, with unusual specificity, covering various groups of unrelated substances, while ignoring some that are closely related structurally. Several distinct enzymes may be present in a single eukaryotic cell. Many of them transport glutathione—drug conjugates. Some also show some ’flippase’ (phospholipid-translocating ATPase; EC 3.6.3.1) activity.
History
created 2000 (EC 3.6.3.45 incorporated 2006), modified 2006, deleted 2018
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EC Tree
1 Oxidoreductases
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
3.6.1.1 inorganic diphosphatase
3.6.1.2 trimetaphosphatase
3.6.1.3 adenosinetriphosphatase
3.6.1.4 created 1961, deleted 1965
3.6.1.5 apyrase
3.6.1.6 nucleoside diphosphate phosphatase
3.6.1.7 acylphosphatase
3.6.1.8 ATP diphosphatase
3.6.1.9 nucleotide diphosphatase
3.6.1.10 endopolyphosphatase
3.6.1.11 exopolyphosphatase
3.6.1.12 dCTP diphosphatase
3.6.1.13 ADP-ribose diphosphatase
3.6.1.14 adenosine-tetraphosphatase
3.6.1.15 nucleoside-triphosphate phosphatase
3.6.1.16 CDP-glycerol diphosphatase
3.6.1.17 bis(5′-nucleosyl)-tetraphosphatase (asymmetrical)
3.6.1.18 FAD diphosphatase
3.6.1.19 nucleoside-triphosphate diphosphatase
3.6.1.20 5′-acylphosphoadenosine hydrolase
3.6.1.21 ADP-sugar diphosphatase
3.6.1.22 NAD+ diphosphatase
3.6.1.23 dUTP diphosphatase
3.6.1.24 nucleoside phosphoacylhydrolase
3.6.1.25 triphosphatase
3.6.1.26 CDP-diacylglycerol diphosphatase
3.6.1.27 undecaprenyl-diphosphate phosphatase
3.6.1.28 thiamine-triphosphatase
3.6.1.29 bis(5′-adenosyl)-triphosphatase
3.6.1.30 m7G(5′)pppN diphosphatase
3.6.1.31 phosphoribosyl-ATP diphosphatase
3.6.1.32 created 1984, deleted 2000
3.6.1.33 created 1984, deleted 2000
3.6.1.34 created 1984, deleted 2000
3.6.1.35 created 1984, deleted 2000
3.6.1.36 created 1984, deleted 2000
3.6.1.37 created 1984, deleted 2000
3.6.1.38 created 1984, deleted 2000
3.6.1.39 thymidine-triphosphatase
3.6.1.40 guanosine-5′-triphosphate,3′-diphosphate phosphatase
3.6.1.41 bis(5′-nucleosyl)-tetraphosphatase (symmetrical)
3.6.1.42 guanosine-diphosphatase
3.6.1.43 dolichyldiphosphatase
3.6.1.44 oligosaccharide-diphosphodolichol diphosphatase
3.6.1.45 UDP-sugar diphosphatase
3.6.1.46 created 2000, deleted 2003
3.6.1.47 created 2000, deleted 2003
3.6.1.48 created 2000, deleted 200
3.6.1.49 created 2000, deleted 2003
3.6.1.50 created 2000, deleted 2003
3.6.1.51 created 2000, deleted 2003
3.6.1.52 diphosphoinositol-polyphosphate diphosphatase
3.6.1.53 Mn2+-dependent ADP-ribose/CDP-alcohol diphosphatase
3.6.1.54 UDP-2,3-diacylglucosamine diphosphatase
3.6.1.55 8-oxo-dGTP diphosphatase
3.6.1.56 2-hydroxy-dATP diphosphatase
3.6.1.57 UDP-2,4-diacetamido-2,4,6-trideoxy-β-L-altropyranose hydrolase
3.6.1.58 8-oxo-dGDP phosphatase
3.6.1.59 5′-(N7-methyl 5′-triphosphoguanosine)-[mRNA] diphosphatase
3.6.1.60 diadenosine hexaphosphate hydrolase (AMP-forming)
3.6.1.61 diadenosine hexaphosphate hydrolase (ATP-forming)
3.6.1.62 5′-(N7-methylguanosine 5′-triphospho)-[mRNA] hydrolase
3.6.1.63 α-D-ribose 1-methylphosphonate 5-triphosphate diphosphatase
3.6.1.64 inosine diphosphate phosphatase
3.6.1.65 (d)CTP diphosphatase
3.6.1.66 XTP/dITP diphosphatase
3.6.1.67 dihydroneopterin triphosphate diphosphatase
3.6.1.68 geranyl diphosphate phosphohydrolase
3.6.1.69 8-oxo-(d)GTP phosphatase
3.6.1.70 guanosine-5′-diphospho-5′-[DNA] diphosphatase
3.6.1.71 adenosine-5′-diphospho-5′-[DNA] diphosphatase
3.6.1.72 DNA-3′-diphospho-5′-guanosine diphosphatase
3.6.1.73 inosine/xanthosine triphosphatase
3.6.1.74 mRNA 5′-phosphatase
3.6.1.75 diacylglycerol diphosphate phosphatase
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
3.11 Acting on carbon-phosphorus bonds
3.12 Acting on sulfur-sulfur bonds
3.13 Acting on carbon-sulfur bonds
4 Lyases
5 Isomerases
6 Ligases
7 Translocases