Send to

Choose Destination
J Mol Biol. 1995 Aug 25;251(4):471-6.

Immunoglobulin mutant library genetically screened for folding stability exploiting bacterial signal transduction.

Author information

Institut für Molekulare Genetik, Göttingen, F.R.G.


A model repertoire of variants of immunoglobulin kappa variable domain REIv with different folding stabilities was generated by oligonucleotide-directed randomization of position 29, a key conserved residue of hypervariable loop 1. Fused to ToxR', the membrane-anchored cytoplasmic domain of the Vibrio cholerae ToxR transcription activator, different members of the library induce different levels of transcription from the ctx promoter in Escherichia coli. Differences in transcription activation correlate positively with folding stabilities of the corresponding REIv domains. Since conformationally stabilized REIv derivatives elicit a dark red colony phenotype on EMB-lactose indicator plates, this procedure constitutes a genetic screen for immunoglobulin folding stability.

[Indexed for MEDLINE]

Supplemental Content

Full text links

Icon for Elsevier Science
Loading ...
Support Center