Difference between revisions of "Part:BBa K3090001"

Revision as of 08:35, 16 October 2019

single chain variable fragment (scFv(P5))

scFv(P5) is chimeric molecule in which several groups of residues important for antigen binding in the poorly stable anti-hen egg lysozyme (HEL) scFv(D1.3) were progressively grafted onto the scFv(F8) scaffoldis to maintain cytoplasmic stability and specificity.

Usage and Biology

Only a few antibodies have proved to possess naturally both high in vitro thermodynamic stability and the capacity to be functionally expressed in the cytosol milieu. Among these, the scFv(F8), deriving from a monoclonal antibody raised against the coat protein of the plant virus AMCV, has been expressed as a functional molecule in the cytoplasm of Escherichia coli, yeast,and plants. Denaturation/renaturation studies indicate that this molecule has high in vitro stability and is capable of refolding to a functional form under reducing conditions. Based on the scFv(F8) scaffold, antigen binding residues in the complementarity determining regions (CDRs) of anti-hen egg white lysozyme (HEL) D1.3 monoclonal antibody was grafted to scFv(F8) to make this part "scFv(F8)".

Sequence and Features

Characterization

scFv(P5) with N-terminal CPP(BBa_K3090000)is expressed in E.coli and purified using Ni-NTA affinity column.

References

1. Tavladoraki, P., Benvenuto, E., Trinca, S., De Martinis, D., Cattaneo, A. & Galeffi, P. (1993). Transgenic plants expressing a functional single-chain Fv antibody are specifically protected from virus attack. Nature, 366, 469–472.

2. Donini M, Morea V, Desiderio A, Pashkoulov D, Villani ME, Tramontano A, Benvenuto E. Engineering stable cytoplasmic intrabodies with designed specificity. J Mol Biol. 2003 Jul 4;330(2):323-32.

3. Bhat, T. N., Bentley, G. A., Boulot, G., Greene, M. I., Tello, D., Dall’Acqua, W. et al. (1994). Bound water molecules and conformational stabilization help mediate an antigen–antibody association. Proc. Natl Acad. Sci. USA, 91, 1089–1093