Expression and purification of 15 kDa granulysin utilizing an insect cell secretion system

Michael W. Finn, Carol Clayberger*, Alan M. Krensky

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Granulysin is an antimicrobial and proinflammatory protein expressed in activated human T cells and natural killer cells. A single mRNA produces the 15 kDa isoform which is then cleaved at the amino and carboxy termini to produce the 9 kDa isoform. Recombinant 9 kDa granulysin has been studied in detail but little is known about the function of the 15 kDa isoform, and no protocol has been published describing expression and purification of this form. Two commercially available preparations of the recombinant 15 kDa granulysin contain tags that may affect function. Here we describe for the first time a method to produce 15 kDa granulysin as a secreted protein from insect cells. The 15 kDa granulysin is purified using a HiTrap Heparin column and a Resource S column. A typical a yield of purified 15 kDa granulysin is 0.6 mg/L of insect cell supernatant.

Original languageEnglish (US)
Pages (from-to)70-74
Number of pages5
JournalProtein Expression and Purification
Volume75
Issue number1
DOIs
StatePublished - Jan 1 2011

Keywords

  • Granulysin
  • Insect cell expression
  • Monocytes
  • NK-cells
  • Recombinant protein
  • T cells

ASJC Scopus subject areas

  • Biotechnology

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