Topoisomerase I Antibody

Product: CHIR-99021 (trihydrochloride)

Topoisomerase I Antibody Summary

Immunogen
The immunogen for this product maps to a region between residue 100 and 150 of human DNA topoisomerase I using the numbering given in entry NP_003277.1 (GeneID 7150).
Predicted Species
Rat (100%), Porcine (100%), Primate (100%), Bovine (100%), Chinese Hamster (100%), Rhesus Macaque (100%), Rabbit (100%). Backed by our 100% Guarantee.
Clonality
Polyclonal
Host
Rabbit
Gene
TOP1
Purity
Immunogen affinity purified
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Applications/Dilutions

Dilutions
  • Western Blot 1:2000-1:10000
  • Immunoprecipitation 2-5 ug/mg lysate
Application Notes
The observed molecular weight of the protein may vary from the listed predicted molecular weight due to post translational modifications, post translation cleavages, relative charges, and other experimental factors.
Theoretical MW
91 kDa.
Disclaimer note: The observed molecular weight of the protein may vary from the listed predicted molecular weight due to post translational modifications, post translation cleavages, relative charges, and other experimental factors.
Publications
Read Publications using
NBP1-30481 in the following applications:

  • WB
    2 publications

Reactivity Notes

Based on 100% sequence identity, this antibody is predicted to react with Orangutan, Gorilla, Chimpanzee, White-tufted-ear marmoset, Green monkey, Crab-eating macaque, African elephant, Small-eared galago and Northern white-cheeked gibbon.

Packaging, Storage & Formulations

Storage
Store at 4C. Do not freeze.
Buffer
TBS and 0.1% BSA
Preservative
0.09% Sodium Azide
Concentration
0.2 mg/ml
Purity
Immunogen affinity purified

Alternate Names for Topoisomerase I Antibody

  • DNA topoisomerase 1
  • DNA topoisomerase I
  • EC 5.99.1.2
  • TOPI
  • topoisomerase (DNA) I
  • type I DNA topoisomerase

Background

Topoisomerases are nuclear enzymes involved in a variety of cellular activities such as chromosome condensation, DNA replication, transcription, recombination and segregation at mitosis. Human topoisomerase I is a 100kD protein capable of relaxing positively and negatively supercoiled DNA by performing a transient single stranded nick which is then religated at the end of the reaction. It has been shown that the enzyme is located in regions of the genome that are undergoing active RNA synthesis, where it probably reduces superhelical stresses in the DNA, enabling RNA polymerase to function properly. Both DNA topoisomerases I and II have been found to be targets of autoantibodies in the sera of patients with certain autoimmune diseases such as systemic lupus erythematosus and also of some anti tumor drugs and antibiotics. Elevated levels of DNA topoisomerase I, detected by transfer assays, have been demonstrated in colorectal tumors compared with normal colon mucosa as a result of increased transcription or mRNA stability.

PMID: 8773443