Biosynthetic Antibody Binding Sites: Development of a Single-chain Fv Model Based on Antidinitrophenol IgA Myeloma MOPC 315
Overview
Affiliations
The functional antigen binding region of antidinitrophenol mouse IgA myeloma MOPC 315 has been produced as a single-chain Fv (sFv) protein in E. coli. Recombinant 315 proteins included sFv alone, a bifunctional fusion protein with amino-terminal fragment B (FB) of staphylococcal protein A, and a two-chain 315 Fv fragment. Successful refolding of the 315 sFv required formation of disulfide bonds while the polypeptide was in a denatured state, as previously observed for the parent Fv fragment. Affinity-purified recombinant 315 proteins showed full recovery of specific activity, with values for Ka,app of 1.5 to 2.2 x 10(6) M-1, equivalent to the parent 315 Fv fragment. As observed for natural 315 Fv, the sFv region of active FB-sFv315 fusion protein was resistant to pepsin treatment, whereas inactive protein was readily degraded. These experiments will allow the application of protein engineering to the 315 single-chain Fv; such studies can advance structure-function studies of antibody combining sites and lead to an improved understanding of single-chain Fv proteins.
Nakayashiki N, Yoshikawa K, Nakamura K, Hanai N, Okamoto K, Okamoto S Jpn J Cancer Res. 2000; 91(10):1035-43.
PMID: 11050475 PMC: 5926257. DOI: 10.1111/j.1349-7006.2000.tb00882.x.
Savage P, Rowlinson-Busza G, Verhoeyen M, Spooner R, So A, Windust J Br J Cancer. 1993; 68(4):738-42.
PMID: 8398702 PMC: 1968604. DOI: 10.1038/bjc.1993.420.
A universal antibody-derived targeting agent.
Spooner R, Deonarain M, Savage P, Epenetos A Cell Biophys. 1993; 22(1-3):225-42.
PMID: 7889540 DOI: 10.1007/BF03033875.
Antigen recognition and targeted delivery by the single-chain Fv.
Huston J, Tai M, McCartney J, Keck P, Oppermann H Cell Biophys. 1993; 22(1-3):189-224.
PMID: 7889539 DOI: 10.1007/BF03033874.
Huston J, Cohen C, Maratea D, Fields F, Tai M, Juffras R Biophys J. 1992; 62(1):87-91.
PMID: 1600106 PMC: 1260494. DOI: 10.1016/S0006-3495(92)81788-5.