Recombinant D. melanogaster DNA topoisomerase 3-beta(Top3beta), partial

Drosophila melanogaster

Top3beta

Top3beta; TOP3; CG3458; DNA topoisomerase 3-beta; EC 5.6.2.1; DNA topoisomerase III beta

Type IA topoisomerase family

Releases the supercoiling and torsional tension of DNA introduced during the DNA replication and transcription 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-(5'-phosphotyrosyl)-enzyme intermediate and the expulsion of a 3'-OH DNA strand. The free DNA strand than undergoes passage around the unbroken strand thus removing DNA supercoils. Finally, in the religation step, the DNA 3'-OH attacks the covalent intermediate to expel the active-site tyrosine and restore the DNA phosphodiester backbone. Weakly relaxes negative supercoils and displays a distinct preference for binding single-stranded DNA.

KEGG: Dmel_CG3458; STRING: 7227.FBpp0070891; UniGene: Dm.2946

Recombinant Protein

Yeast; E. coli; Baculovirus; Mammalian cell

Partial

>85% (SDS-PAGE)

The following tags are available. N-terminal His-tagged Tag-Free

Lyophilized powder

Tris/PBS-based buffer, 6% Trehalose, pH 8.0

We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Please reconstitute protein in deionized sterile water to a concentration of 0.1-1.0 mg/mL.We recommend to add 5-50% of glycerol (final concentration) and aliquot for long-term storage at -20 °C/-80 °C. Our default final concentration of glycerol is 50%. Customers could use it as reference.

Delivery time may differ from different purchasing ways or locations, please kindly consult us for specific delivery times.

Store at -20 °C/-80 °C upon receipt, aliquoting is necessary for multiple use.

The shelf life is related to many factors, including storage state, buffer ingredients, storage temperature, and the stability of the protein itself. Generally, the shelf life of liquid form is 6 months at -20 °C/-80 °C. The shelf life of lyophilized form is 12 months at -20 °C/-80 °C.

Repeated freezing and thawing are not recommended.

This product is for research use only and is not approved for use in humans or in clinical diagnosis. Store working aliquots at 4 °C for up to one week.