Cloning, expression, and purification of HIV-2 gp125 |
| |
Authors: | Samer Sourial Anette Wärnmark Charlotta Nilsson Ewa Björling Adnane Achour Robert A. Harris |
| |
Affiliation: | Microbiology and Tumor Biology Center, Karolinska Institutet, S-171 77, Stockholm, Sweden. samer.sourial@mtc.ki.se |
| |
Abstract: | The envelope of the human immunodeficiency virus (HIV) is the main target for neutralizing antibodies. We report the cloning, purification, and characterization of two recombinant forms of the envelope glycoprotein gp125 from a primary HIV-2SBL-6669 isolate. Both constructs were truncated at the N- and C-termini, and in the gp125Δv1v2 construct the variable V1 and V2 loops were deleted. The recombinant glycoproteins were stably expressed in Chinese hamster ovarian cells, producing soluble gp125 and gp125Δv1v2 at molecular weights of 74.2 and 56.9 kDa, respectively, and were purified from cell culture supernatants in a single step using Galanthus nivalis lectin chromatography. Circular dichroism analysis indicated a similar secondary structure for gp125 and gp125Δv1v2, and both proteins were recognized by HIV-2 serum antibodies in surface plasmon resonance assays. The high yield and purity of these constructs makes them suitable for structural and functional analyses, as well as vaccine studies. |
| |
Keywords: | HIV envelope surface unit lectin viral glycoprotein |
本文献已被 PubMed SpringerLink 等数据库收录! |
|