Research group: Combinatorial protein engineering Nord, K., Gunneriusson, E., Uhlén, M. and Nygren, P.-Å. (2000) "Ligands selected from combinatorial libraries of protein a for use in affinity capture of apolipoprotein A-1 and Taq DNA polymerase" J. Biotechnol. 80, 45-54. Lehtiö, J., Teeri, T. and Nygren, P.-Å. (2000) "Alpha-amylase inhibitors selected from a combinatorial library of a cellulose binding domain scaffold" Proteins: Struct. Funct. Gen. 41, 316-322 Principal Investigator (PI ): Prof. PerÅke Nygren Danielsen S., Eklund, M., Deussen, H.-J., Gräslund, T., Nygren, P.-Å. and Borchert, T. [2001] "In vitro selection of enzymatically active lipase variants from phage libraries using a mechanism-based inhibitor" Gene 272, 267-274. Personnel: Malin Eklund, Olof Nord, Erik Forsén, Nina Bandmann Karlström, A. and Nygren, P.-Å. [2001] "Dual labeling of a binding protein allows for specific fluorescence detection of native protein" J. Anal. Biochem. 295, 22-30. Description: Our research group has a focus on the use and development of combinatorial protein engineering principles to provide new tools for a variety of biotechnology applications, with an emphasis on affinity technology, including protein expression, purification, detection and biomolecular recognition. A core technology is an in-house developed platform for the generation of tailormade affinity proteins, denoted affibodies. These are isolated by different powerful in-house-developed in vitro or in vivo selection principles from large collections (libraries) constructed by combinatorial mutagenesis of a small and robust protein domain used as scaffold. Such "artificial antibodies" are at present explored for use in a variety of applications, incl. bioseparation, diagnostics, self-assembly and therapy. Combinatorial principles are also employed for gene expression cassette design to facilitate high-throughput production of recombinant proteins. Nord, K., Nord, O., Uhlén, M., Kelley, B., Ljungqvist, C. and Nygren, P.Å. (2001) “Recombinant human factor VIII-specific affinity ligands selected from phage-displayed combinatorial libraries of protein A" Eur. J. Biochem. 268, 4269-4277. Bandmann, N., Van Alstine, J., Veide, A. and Nygren, P.-Å. (2002) "Functional selection of phage displayed peptides for improved aqueous two phase partitioning of recombinant proteins" J. Biotechnology 93, 1-14. Rönnmark, J., Hansson, M., Nguyen, T., Uhlén, M., Robert, A., Ståhl, S. and Nygren, P.-Å. (2002) "Construction and characterization of affibody-Fc chimeras produced in Escherichia coli" J. Immunol. Meth. 261, 199-211. M. Eklund, Axelsson, L., Uhlén, M and Nygren, P.-Å. (2002) "Antiidiotypic protein domains selected from Protein A-based affibody libraries" Prot. Struct. Funct. Gen.48, 454-462. Rönnmark, J., Grönlund, H. Uhlén, M. and Nygren, P.-Å. (2002) "Human immunoglobulin A (IgA)-specific ligands from combinatorial engineering of protein A" Eur. J. Biochem. 269, 2647-2655. Henning, P., Magnusson, M. K., Gunneriusson, E., Hong, S. S., Boulanger, P., Nygren, P.-Å. and Lindholm, L. (2002) "Genetic modification of adenovirus 5 tropism by a novel class of ligands based on a three-helix bundle scaffold derived from staphylococcal protein A." Human Gene Therapy 13, 1427-1439. Rönnmark, J, Kampf, C., Asplund, A., Höidén-Guthenberg, Wester, K., IM, Pontén, F., Uhlén, M. and Nygren, P.-Å. (2003)"Affibody-galactosidase immunoconjugates produced as soluble fusion proteins in the E. coli cytosol". J. Immunol. Meth. 281, 149-160. Högbom, M., Eklund, M., Nygren, P.-Å. and Nordlund P. (2003) "Crystal structure of an in vitro evolved affibody-protein complex" Proc. Natl. Acad. Sci. U.S.A. 100, 3191-3196. Wahlberg, E., Lendel, C., Helgstrand, M., Allard, P., Dincbas-Renqvist, V., Hedqvist, A., Berglund, H., Nygren, P.-Å. and Härd, T. (2003) "An affibody in complex with a target protein: structure and coupled folding" Proc. Natl. Acad. Sci. U.S.A. 100, 3185-3190. Nord, N., Uhlén, M. and Nygren, P.-Å. (2003) "Microbead display of proteins by cell-free expression of anchored DNA" J. Biotechnology 106, 1-13. Sandström, K., Xu, Z., Forsberg, G. and Nygren, P.-Å. (2003) "Inhibition of the CD28-CD80 co-stimulation signal by a CD28-binding ligand developed by combinatorial protein engineering". Protein Engineering 6, 691-697. Nord, K., Gunneriusson, E., Ringdahl, J., Ståhl, S., Uhlén, M. and Nygren, P.-Å. (1997) "Binding proteins selected from libraries of an -helical bacterial receptor domain" Nature Biotechnology 15, 772-777. Eklund, M., Sandström K., Teeri, T. and Nygren, P.-Å. (2004) "Sitespecific and reversible anchoring of active proteins onto cellulose using a cellulosome-like complex" J. Biotechnol. In press. Nygren, P.-Å. and Uhlén, M. (1997) "Scaffolds for engineering novel binding sites in proteins" Curr. Opin. Struct. Biol. 7, 463-469. Hansson, M., Ringdahl, J., Robert, A., Power, U., Goetsch, L., Nguyen, T., Uhlén, M., Ståhl, S. and Nygren, P.-Å. (1999) "An in vitro selected binding protein (affibody) shows conformation-dependent recognition of the respiratory syncytial virus (RSV) G protein. Immunotechnology 4, 237-252. Gunneriusson, E., Nord, K., Uhlén, M. and Nygren, P.-Å. (1999) "Affinity maturation of a Taq DNA polymerase specific affibody by helix shuffling" Protein Engineering 12, 873-878. Legendre, D., Laraki, N., Gräslund, T., Björnvad, M. E., Bouchet, M., Nygren, P.-Å., Borchert, T. V. and Fastrez, J. (2000) “Display of active subtilisin 309 on phage: Analysis of parameters influencing the selection of subtilisin variants with changed substrate specificity from libraries using phosphonylating inhibitors” J. Mol. Biol. 296, 87-102. 1 2