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1.11.1.11: L-ascorbate peroxidase

This is an abbreviated version!
For detailed information about L-ascorbate peroxidase, go to the full flat file.

Word Map on EC 1.11.1.11

Reaction

2 L-ascorbate +

H2O2
+ 2 H+ = 2 monodehydroascorbate + 2 H2O

Synonyms

Am-pAPX1, APEX2, APOX, APX, APX 1, APX 2, APX1, APX2, APX3, APX4, APX5, APX6, APX7, APx8, APXS, APXT, ascorbate peroxidase, ascorbate peroxidase 1, ascorbate peroxidase 2, ascorbate peroxidase 3, ascorbate peroxidase 4, ascorbate peroxidase 5, ascorbate peroxidase 6, ascorbate peroxidase 7, ascorbate peroxidase 8, ascorbate peroxidase6, ascorbic acid peroxidase, At1g07890, AT1G77490, AT3G09640, AT4G08390, AT4G32320, AT4G35000, AT4G35970, AtAPx08, AtAPX1, AtAPX2, AtAPX3, AtAPX5, AtAPX6, AtSAPX, AtstAPX, AtTAPX, cAPX, cAPX 2, CmstAPX, CrAPX4, CreAPX1, CreAPX2, CreAPX4, CreAPXheme, CsAPX1, cytoplasmic ascorbate peroxidase 1, cytosolic ascorbate peroxidase, GhAPX1, glyoxysomal APX, HvAPX1, L-ascorbate peroxidase, L-ascorbate peroxidase 3, L-ascorbate peroxidase 5, L-ascorbate peroxidase 6, L-ascorbate peroxidase, heme-containing, L-ascorbic acid peroxidase, L-ascorbic acid-specific peroxidase, LmAPX, MaAPX1, OsAPx1, OsAPx2, OsAPx3, OsAPx4, OsAPx5, OsAPx6, OsAPx7, OsAPx8, OsAPXa, OsAPXb, pAPX, Pavirv00022559m, peroxidase, ascorbate, peroxisomal ascorbate peroxidase, PgAPX1, PHYPA_001206, PHYPA_001884, PHYPA_021776, PHYPA_024580, PHYPA_024582, Potri.002G081900, Potri.004G174500, Potri.005G112200, Potri.005G161900, Potri.005G179200, Potri.006G089000, Potri.006G132200, Potri.006G254500, Potri.009G015400, Potri.009G134100, Potri.016G084800, PpAPX, PpAPX-S, PpAPX2, PpAPX2.1, PpAPX2.2, PpAPX3, PpAPX6-related, PtAPX-S.1, PtAPX-S.2, PtAPX-TL29, PtAPX.3, PtAPX1.1, PtAPX1.2, PtAPX2, PtAPX3, PtAPX5, PtAPX5-like, PtAPX6 related, PtotAPX, RcAPX, sAPX, stromal APX, stromal ascorbate peroxidase, stromal ascorbate peroxidases, TaAPX, tAPX, thylakoid ascorbate peroxidase, thylakoid membrane-bound ascorbate peroxidases, thylakoid-bound ascorbate peroxidase

ECTree

     1 Oxidoreductases
         1.11 Acting on a peroxide as acceptor
             1.11.1 Peroxidases
                1.11.1.11 L-ascorbate peroxidase

Activating Compound

Activating Compound on EC 1.11.1.11 - L-ascorbate peroxidase

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ACTIVATING COMPOUND
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
IMAGE
methyl jasmonate
knockout mutant plants lacking Apx1 show high sensitivity to wounding and methyl jasmonate treatment. In the leaves of wild-type plants, H2O2 accumulates only in the vicinity of the wound, while in the leaves of the knockout mutant plants it accumulates extensively from damaged to undamaged regions. During methyl jasmonate treatment, the levels of H2O2 are much higher in the leaves of Apx1 knockout plants
nitric oxide
-
causes an increase in the total enzymatic activity of ascorbate peroxidase. The nitric oxide-induced changes in ascorbate peroxidase enzymatic activity are coupled to altered nodule H2O2 content. Enzymatic activity of the largest isoform, Apx1 is upregulated by 11% in response to 5 microM of nitric oxide donor DETA/NO and 21% in response to 10 microM DETA/NO. 5 microM of DETA/NO increase the enzymatic activity of the second largest isoform Apx2 by about 57%. Treatment of nodulated soybean with 5 microM DETA/NO upregulates the smallest nodule isoform Apx3 enzymatic activity by 228% compared to untreated controls
phenanthrene
-
exposure to 0.5 microM phenanthrene results in significant increase in the levels of both enzymatic and non-enzymatic antioxidants, with the levels of total glutathione and ascorbate doubling, the activitiy of APOX increasing by 2fold after 72 h of exposure to phenanthrene
additional information
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