Protein Name:
DNA topoisomerase I, mitochondrial
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UniprotKB/SwissProt ID: Q8R4U6 (Q8R4U6)
Gene Name:
Top1mt
Organism: Mus musculus (Mouse)
Function: Releases the supercoiling and torsional tension of DNA introduced during duplication of mitochondrial DNA by transiently cleaving and rejoining one strand of the DNA duplex. Introduces a single-strand break via transesterification at a target site in duplex DNA. The scissile phosphodiester is attacked by the catalytic tyrosine of the enzyme, resulting in the formation of a DNA-(3'-phosphotyrosyl)-enzyme intermediate and the expulsion of a 5'-OH DNA strand. The free DNA strand then rotates around the intact phosphodiester bond on the opposing strand, thus removing DNA supercoils. Finally, in the religation step, the DNA 5'-OH attacks the covalent intermediate to expel the active-site tyrosine and restore the DNA phosphodiester backbone (By similarity)
Other Modifications: View all modification sites in dbPTM
Protein Subcellular Localization: Mitochondrion
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Graphical Visualization of S-nitrosylation Sites:
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The S-nitrosylation sites of Q8R4U6
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| No. |
Position |
S-nitrosylated Peptide |
Secondary Structure of S-nitrosylated Peptide |
Solvent Accessibility of nitrosylated Site |
PubMed ID |
| 1 |
333 |
EEGETADTVG C CSLRVEHIRL |
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