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Key Documents

SRP2034

Sigma-Aldrich

Topo I (N1-197) (NTD) human

recombinant, expressed in insect cells, ≥85% (SDS-PAGE)

Sinónimos:

TOPI

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About This Item

UNSPSC Code:
12352202
NACRES:
NA.26

biological source

human

recombinant

expressed in insect cells

assay

≥85% (SDS-PAGE)

form

frozen liquid

mol wt

~25.3 kDa

packaging

pkg of 5 μg

storage condition

avoid repeated freeze/thaw cycles

concentration

1000 μg/mL

color

clear colorless

NCBI accession no.

UniProt accession no.

shipped in

dry ice

storage temp.

−70°C

Gene Information

human ... TOP1(7150)

Biochem/physiol Actions

Human DNA topoisomerase I is the best studied of the DNA topoisomerase family. It 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, cell cycle and other gene regulatory pathways during cell growth and development. The N-terminal 214 amino acids of topoisomerase I comprise a highly charged N-terminal domain (NTD) involved in protein-protein interactions with a number of cellular proteins, including SV40 T antigen, nucleolin, SR proteins, p53 and other transcription factors.

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.

Storage Class

10 - Combustible liquids

wgk_germany

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable


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D Gai et al.
Journal of virology, 74(11), 5224-5232 (2000-05-09)
Topoisomerase I (topo I) is required for releasing torsional stress during simian virus 40 (SV40) DNA replication. Recently, it has been demonstrated that topo I participates in initiation of replication as well as in elongation. Although T antigen and topo
Yinghui Mao et al.
Proceedings of the National Academy of Sciences of the United States of America, 99(3), 1235-1240 (2002-01-24)
The nonconserved, hydrophilic N-terminal domain of eukaryotic DNA topoisomerase I (topo I) is dispensable for catalytic activity in vitro but essential in vivo. There are at least five putative nuclear localization signals and a nucleolin-binding signal within the first 215
P Haluska et al.
Nucleic acids research, 26(7), 1841-1847 (1998-05-30)
We have attempted to identify human topoisomerase I-binding proteins in order to gain information regarding the cellular roles of this protein and the cytotoxic mechanisms of the anticancer drug camptothecin, which specifically targets topoisomerase I. In the course of this

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