Original Article

Bacterial Expression of TMTP1-Fused L-Asparaginase for Targeting Leukemia and Metastatic Tumor Cells

Abstract

L-asparaginase is recognized as a first-line anticancer drug for acute lymphoblastic leukemia (ALL); however, low-substrate specificity and exhibiting glutaminase activity cause various off-target toxicities on normal cells. In the following study, we functionalized wild-type asparaginase with the TMTP1 targeting peptide which specifically targets a variety of hematological and metastatic cancer cells. The peptide sequence was genetically added to the N-terminal end of the asparaginase using the restriction endonuclease-free cloning method. Wild-type and engineered asparaginases were expressed in E. coli and purified by Nickel affinity chromatography column. The in vitro activity of both types of enzymes was evaluated by Nessler’s method. The sequencing results showed that the TMTP1 sequence was added in the correct frame to the asparaginase. Wild-type and TMTP1-fused asparaginases were produced in a soluble state with the specific activity of 172 U/mg and 153 U/mg, respectively. The evidence from this study suggests that TMTP1-fused asparaginase could preserve its solubility and activity compared to the wild-type species and can be proposed for future research in anticancer therapies.

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Files
IssueVol 61 No 4 (2023) QRcode
SectionOriginal Article(s)
DOI https://doi.org/10.18502/acta.v61i4.13173
Keywords
L-asparaginase TMTP1 targeting peptide Acute lymphoblastic leukemia Restriction endonuclease-free cloning
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Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
How to Cite
1.
Kheirandish MH, Tollabi M, Davami F, Rahmani B, Hashemi Aval NS, Behroozi J, Zarei Jaliani H. Bacterial Expression of TMTP1-Fused L-Asparaginase for Targeting Leukemia and Metastatic Tumor Cells. Acta Med Iran. 2023;61(4):223-228.