Topoisomerase I Recombinant Protein | TOP1 recombinant protein

Recombinant Topoisomerase I (TOP1)

Cat. Num. AAA2029560

• Applications: SDS-Page, Western Blot, ELISA, Immunoprecipitation
• Purity: >95%
• Synonyms: Topoisomerase I; Recombinant Topoisomerase I (TOP1); TOP1 recombinant protein

• Host: Host: E Coli; Source: Prokaryotic expression
• Purity/Purification: >95%
• Form/Format: Supplied as lyophilized form in PBS, pH7.4, containing 5% trehalose, 0.01% sarcosyl.
• Concentration: 9.4 (varies by lot)
• Sequence: The target protein is fused with two N-terminal Tags, His-tag and T7-tag, its sequence is listed below.; MGSSHHHHHH SSGLVPRGSH MASMTGGQQM GRGSEF- MSGDHLHNDS QIEADFRLND SHKHKDKHKD REHRHKEHKK EKDREKSKHS NSEHKDSEKK HKEKEKTKHK DGSSEKHKDK HKDRDKEKRK EEKVRASGDA KIKKEKENGF SSPPQIKDEP EDDGYFVPPK EDIKPLKRPR DEDDADYKPK KIKTEDTKKE KKRKLEEEED GKLKKPKNKD KDKKVPEPDN KKKKPKKEEE QKWKWWEEER YPEGIKWKFL EHKGPVFAPP YEPLPENVKFYYDGKVMKLS
• Sequence Length: 870

• Applicable Applications for TOP1 recombinant protein: SDS-PAGE, Western Blot (WB), ELISA (EIA), Immunoprecipitation (IP)
• Predicted Molecular Mass: 34.0kDa
• Accurate Molecular Mass (KD): 40kDa
• Endotoxin: <1.0EU per 1ug (determined by the LAL method)
• Expression System: Prokaryotic expression
• Tag: two N-terminal Tags, His-tag and T7-tag
• Organism Species: Homo sapiens (Human)
• Fragment: Met1~Ser250
• Usage: Reconstitute in sterile PBS, pH7.2-pH7.4.
• Preparation and Storage: Storage: Avoid repeated freeze/thaw cycles. Store at 2-8 degree C for one month. Aliquot and store at -80 degree C for 12 months.; Stability Test: The thermal stability is described by the loss rate of the targetprotein. The loss rate was determined by accelerated thermal degradation test, that is, incubate the protein at 37 degree C for 48h, and no obvious degradation andprecipitation were observed. The loss of this protein is less than 5% within the expiration date under appropriate storage condition.

SDS-Page

NCBI and Uniprot Product Information

• NCBI GI #: 787856383
• Molecular Weight: 96,934 Da
• NCBI Official Full Name: topoisomerase I
• UniProt Protein Name: DNA topoisomerase 1
• Protein Family: Topoisomerase I damage affected protein
• UniProt Gene Name: topA
• UniProt Entry Name: A0A0D5Y2K4_9PSED

Uniprot Description

Releases the supercoiling and torsional tension of DNA, which is 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 then 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.