Ascorbate peroxidase
From Proteopedia
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== Structural highlights == | == Structural highlights == | ||
| - | The heme-containing active site of APX contains a His residue which coordinates with the heme and confers stability to the Fe state in the heme. | + | The heme-containing active site of APX contains a His residue (H163 in soybean) which coordinates with the heme and confers stability to the Fe state in the heme. |
==3D structures of ascorbate peroxidase== | ==3D structures of ascorbate peroxidase== | ||
Revision as of 10:40, 5 November 2015
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Contents |
Function
Ascorbate peroxidase (APX) catalyzes the conversion of ascorbate and hydrogen peroxide to dehydroascorbate and water thus detoxifying hydrogen peroxide. APX is involved in the glutathione-ascorbate cycle. APX is accumulated in plants in response to heat and drought stress. APX contains a heme group.
Relevance
APX is part of plants antioxidant defense. APX converts H2O2 to water using ascorbate as an electron donor. APX is used in electron microscopy as a genetic tag which can be stained independently of light activation.
Structural highlights
The heme-containing active site of APX contains a His residue (H163 in soybean) which coordinates with the heme and confers stability to the Fe state in the heme.
3D structures of ascorbate peroxidase
Updated on 05-November-2015
