Effects of protein engineering and rational mutagenesis on crystal lattice of single chain antibody fragments


Creative Commons License

KALYONCU UZUNLAR S., Hyun J., Pai J. C., Johnson J. L., Entzminger K., Jain A., ...Daha Fazla

PROTEINS-STRUCTURE FUNCTION AND BIOINFORMATICS, cilt.82, sa.9, ss.1884-1895, 2014 (SCI-Expanded, Scopus) identifier identifier

Özet

Protein crystallization is dependent upon and sensitive to, the interamolecular contacts that assist in ordering proteins into a three-dimensional lattice. Here we used protein engineering and mutagenesis to affect the crystallization of single chain antibody fragments (scFvs) that recognize the EE epitope (EYMPME) with high affinity. These hypercrystallizable scFvs are under ones. Guided by analyses of intermolecular crystal lattice contacts, two second-generation anti-EE scFvs were produced, which from the parent scFv framework remained unchanged through the processes of protein with installed EE tags. Surprisingly, although noncomplementarity determining region (CDR) lattice residues from the parent scFv framework remained unchanged through the processes of protein engineering and rational design, crystal lattices of the derivative scFvs differ. Comparison of energy calculations and the experimentally-determined lattice interactions for this basis set provides insight into the complexity of the forces driving crystal lattice choice and demonstrates the availability of multiple well-ordered surface features in our scFvs capable of forming versatile crystal contacts.