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Merck
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Key Documents

SRP2034

Sigma-Aldrich

Topo I (N1-197) (NTD) human

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

Synonyme(s) :

TOPI

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About This Item

Code UNSPSC :
12352202
Nomenclature NACRES :
NA.26

Source biologique

human

Produit recombinant

expressed in insect cells

Pureté

≥85% (SDS-PAGE)

Forme

frozen liquid

Poids mol.

~25.3 kDa

Conditionnement

pkg of 5 μg

Conditions de stockage

avoid repeated freeze/thaw cycles

Concentration

1000 μg/mL

Couleur

clear colorless

Numéro d'accès NCBI

NM_003286

Numéro d'accès UniProt

P11387

Conditions d'expédition

dry ice

Température de stockage

−70°C

Informations sur le gène

human ... TOP1(7150)

Actions biochimiques/physiologiques

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.

Forme physique

Clear and colorless frozen liquid solution

Notes préparatoires

Use a manual defrost freezer and avoid repeated freeze-thaw cycles. While working, please keep sample on ice.

Code de la classe de stockage

10 - Combustible liquids

Classe de danger pour l'eau (WGK)

WGK 1

Point d'éclair (°F)

Not applicable

Point d'éclair (°C)

Not applicable

Certificats d'analyse (COA)

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Consulter la Bibliothèque de documents

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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