Recombinant Topoisomerase I, Mitochondrial (TOP1MT) [rTOP1MT/488]



DNA topoisomerases are nuclear enzymes that regulate the topological structure of DNA in eukaryotic cells by transiently breaking and rejoining DNA strands. Due to their roles in DNA replication, recombination, and transcription, DNA topoisomerases have been identified as targets of numerous anticancer drugs. Mitochondrial Topo I (DNA topoisomerase I, mitochondrial) is a 601 amino acid protein that primarily acts to relieve DNA strain that may occur during duplication of mitochondrial DNA. As a type IB topoisomerase, mitochondrial Topo I requires a divalent metal, either, calcium or magnesium, as well as an alkaline pH for optimal activity.

Product Properties & Targets

Species Reactivity
Cellular Localization
Light Chain
Gene Name
Positive Control
brain or fetal liver tissue., MCF-7 or A431 cells. Jurkat cell lysate. Human heart, Skeletal muscle
Recombinant full-length human TOP1MT protein
Alternate Names
DNA topoisomerase I, mitochondrial, DNA topoisomerase I; TOP1MT; Topoisomerase I mitochondrial; Type IB Topoisomerase

Database Links

Entrez Gene ID

Additional Information

Human Gene Symbol
Chromosome Location
Mol. Weight of Antigen


  • 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).

Known Applications & Suggested Dilutions

  • Flow Cytometry (0.5-1ug/million cells)
  • ,Immunofluorescence (0.5-1ug/ml)
  • Western Blot (0.5-2ug/ml)
  • ,Immunohistochemistry (Formalin-fixed) (1-2ug/ml for 30 minutes at RT),(Staining of formalin-fixed tissues requires heating tissue sections in 10mM Tris with 1mM EDTA, pH 9.0, for 45 min at 95 &degC followed by cooling at RT for 20 minutes),Optimal dilution for a specific application should be determined.

Key References

  • Zhang, H., et al. 2001. Proc. Natl. Acad. Sci. USA 98: 10608-10613.
  • Zhang, H., et al. 2007. Biochimie 89: 474-481.

Storage & Stability

Antibody with azide - store at 2 to 8 °C. Antibody without azide - store at -20 to -80 °C. Antibody is stable for 24 months. Non-hazardous. No MSDS required.


This antibody is available for research use only and is not approved for use in diagnosis.

Supplied as

200ug/ml of Ab purified from Bioreactor Concentrate by Protein A/G. Prepared in 10mM PBS with 0.05% BSA & 0.05% azide. Also available WITHOUT BSA & azide at 1.0mg/ml.


There are no warranties, expressed or implied, which extend beyond this description. Company is not liable for any personal injury or economic loss resulting from this product.


There are no reviews yet.

Be the first to review “Topoisomerase I, Mitochondrial (TOP1MT)”

Your email address will not be published. Required fields are marked *

Recombinant mouse monoclonal antibodies and recombinant rabbit monoclonals to support your research

Shop Primary Antibodies