Topo I (C651-765) (C terminal domain) human
SIGMA/SRP2032 - recombinant, expressed in insect cells, ≥80% (SDS-PAGE)
Synonym: TOPI
Product Type: Chemical
assay | ≥80% (SDS-PAGE) |
biological source | human |
color | clear colorless |
concentration | 500 μg/mL |
form | frozen liquid |
mol wt | ~15.2 kDa |
NCBI accession no. | NM_003286 ![]() ![]() |
packaging | pkg of 5 μg |
recombinant | expressed in insect cells |
shipped in | dry ice |
storage condition | avoid repeated freeze/thaw cycles |
storage temp. | −70°C |
UniProt accession no. | P11387 ![]() ![]() |
Biochem/physiol Actions: | Human DNA topoisomerase I catalyzes the relaxation of both positive and negative supercoils without the requirement of energy. In addition to DNA replication and transcriptional activation, DNA topoisomerase I also plays a major role in pre-mRNA splicing, recombination, chromatin remodeling and other DNA or RNA templating activities. The C terminal domain of DNA topoisomerase I spanning from amino acids 713 to 765 is highly conserved and connected to the core domain by a poorly conserved linker domain (residues 636-713). An active site tyrosine has been characterized at position 723. Mutation of this tyrosine to phenylalanine at position 723 causes topo I to preferentially bind the supercoiled DNA rather than relaxed DNA in the mixture of supercoiled and relaxed DNA. |
Physical form: | Clear and colorless frozen liquid solution |
Preparation Note: | Use a manual defrost freezer and avoid repeated freeze-thaw cycles. While working, please keep sample on ice. |
RIDADR | NONH for all modes of transport |
WGK Germany | WGK 1 |
Flash Point(F) | Not applicable |
Flash Point(C) | Not applicable |
Purity | ≥80% (SDS-PAGE) |
Storage Temp. | −70°C |
UNSPSC | 12352200 |