Journal article

High Yield Production of a Soluble Human Interleukin-3 Variant from E. coli with Wild-Type Bioactivity and Improved Radiolabeling Properties

Timothy R Hercus, Emma F Barry, Mara Dottore, Barbara J McClure, Andrew I Webb, Angel F Lopez, Ian G Young, James M Murphy



Human interleukin-3 (hIL-3) is a polypeptide growth factor that regulates the proliferation, differentiation, survival and function of hematopoietic progenitors and many mature blood cell lineages. Although recombinant hIL-3 is a widely used laboratory reagent in hematology, standard methods for its preparation, including those employed by commercial suppliers, remain arduous owing to a reliance on refolding insoluble protein expressed in E. coli. In addition, wild-type hIL-3 is a poor substrate for radio-iodination, which has been a long-standing hindrance to its use in receptor binding assays. To overcome these problems, we developed a method for expression of hIL-3 in E. coli as a soluble..

View full abstract


Awarded by National Health and Medical Research Council of Australia (NHMRC)

Awarded by Australian Research Council fellowship

Awarded by NHMRC IRIISS grant

Funding Acknowledgements

This work was supported by National Health and Medical Research Council of Australia (NHMRC) grants (1033368 and 565217); an Australian Research Council fellowship (FT100100100) to JMM; with additional support from the Victorian State Government Operational Infrastructure Support and NHMRC IRIISS grant (361646). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.