A phage display vector optimized for the generation of human antibody combinatorial libraries and the molecular cloning of monoclonal antibody fragments

Laura Solforosi, Nicasio Mancini, Filippo Canducci, Nicola Clementi, Giuseppe Andrea Sautto, Roberta Antonia Diotti, Massimo Clementi, Roberto Burioni

Research output: Contribution to journalArticle

Abstract

A novel phagemid vector, named pCM, was optimized for the cloning and display of antibody fragment (Fab) libraries on the surface of filamentous phage. This vector contains two long DNA "stuffer" fragments for easier differentiation of the correctly cut forms of the vector. Moreover, in pCM the fragment at the heavy-chain cloning site contains an acid phosphatase-encoding gene allowing an easy distinction of the Escherichia coli cells containing the unmodified form of the phagemid versus the heavy-chain fragment coding cDNA. In pCM transcription of heavy-chain Fd/gene III and light chain is driven by a single lacZ promoter. The light chain is directed to the periplasm by the ompA signal pep-tide, whereas the heavy-chain Fd/coat protein III is trafficked by the pelB signal peptide. The phagemid pCM was used to generate a human combinatorial phage display antibody library that allowed the selection of a monoclonal Fab fragment antibody directed against the nucleoprotein (NP) of Influenza A virus.

Original languageEnglish
Pages (from-to)289-294
Number of pages6
JournalNew Microbiologica
Volume35
Issue number3
Publication statusPublished - 2012

Keywords

  • Combinatorial antibody library
  • Human monoclonal antibody fragments (mFabs)
  • Phage display
  • Phagemid vector

ASJC Scopus subject areas

  • Microbiology (medical)

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