Journal
ELIFE
Volume 5, Issue -, Pages -Publisher
ELIFE SCIENCES PUBLICATIONS LTD
DOI: 10.7554/eLife.16228
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Funding
- Groupe de Recherche of the Claudius Regaud Institute (GRICR)
- LABEX CelTisPhyBio through IDEX [11-LBX-0038, ANR-10-IDEX-0001-02 PSL]
- Institut Curie
- CNRS
- ANR BiotecS [ANR-09-BIOT-005]
- AVIESAN (Project TAbIP)
- Fondation pour la Recherche Medicale (FRM)
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In vitro selection of antibodies allows to obtain highly functional binders, rapidly and at lower cost. Here, we describe the first fully synthetic phage display library of humanized llama single domain antibody (NaLi-H1: Nanobody Library Humanized 1). Based on a humanized synthetic single domain antibody (hs2dAb) scaffold optimized for intracellular stability, the highly diverse library provides high affinity binders without animal immunization. NaLi-H1 was screened following several selection schemes against various targets (Fluorescent proteins, actin, tubulin, p53, HP1). Conformation antibodies against active RHO GTPase were also obtained. Selected hs2dAb were used in various immunoassays and were often found to be functional intrabodies, enabling tracking or inhibition of endogenous targets. Functionalization of intrabodies allowed specific protein knockdown in living cells. Finally, direct selection against the surface of tumor cells produced hs2dAb directed against tumor-specific antigens further highlighting the potential use of this library for therapeutic applications.
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