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@ARTICLE{MllerSchiffmann:2682,
author = {Müller-Schiffmann, A. and Petsch, B. and Leliveld, S. R.
and Muyrers, J. and Salwierz, A. and Mangels, Ch. and
Schwarzinger, St. and Riesner, D. and Stitz, L. and Korth,
C.},
title = {{C}omplementarity determining regions of an anti-prion
protein sc{F}v fragment orchestrate conformation specificity
and antiprion activity},
journal = {Molecular immunology},
volume = {46},
issn = {0161-5890},
address = {Oxford},
publisher = {Pergamon Press},
reportid = {PreJuSER-2682},
pages = {532 - 540},
year = {2009},
note = {This work was funded by a grant from the
Forschungskommission of the University of Dusseldorf Medical
School (to R.L.), a grant from the VW foundation (to CX and
S.S.), a grant from the TSE-Program Baden-Wuerttemberg
(729.59-7/1; to L.S.), a grant from the DFG (GRK1033; to
CK), and a grant from the FP6, EU Research Commission
Anteprion (LSHB-C7-2006-019090; to CX and L.S.).},
abstract = {The prion protein, PrP, exists in several stable
conformations, with the presence of one conformation,
PrP(Sc), associated with transmissible neurodegenerative
diseases. Targeting PrP by high-affinity ligands has been
proven to be an effective way of preventing peripheral prion
infections. Here, we have generated bacterially expressed
single chain fragments of the variable domains (scFv) of a
monoclonal antibody in Escherichia coli, originally raised
against purified PrP(Sc) that recognizes both PrP(C) and
PrP(Sc). This scFv fragment had a dissociation constant
(K(D)) with recombinant PrP of 2 nM and cleared prions in
ScN2a cells at 4 nM, as demonstrated by a mouse prion
bioassay. A peptide corresponding to the complementarity
determining region 3 of the heavy chain (CDR3H) selectively
bound PrP(Sc) but had lost antiprion activity. However,
synthesis and application of an improved peptide mimicking
side chain topology of CDR3H while exhibiting increased
protease resistance, a retro-inverso d-peptide of CDR3H,
still bound PrP(Sc) and reinstated antiprion activity. We
conclude that (1) scFvW226 is so far the smallest
polypeptide with bioassay confirmed antiprion activity, and
(2) differential conformation specificity and bioactivity
can be regulated by orchestrating the participation of
different CDRs.},
keywords = {Amino Acid Sequence / Animals / Antibody Affinity:
immunology / Cell Line / Complementarity Determining
Regions: immunology / Complementarity Determining Regions:
metabolism / Mice / Mice, Knockout / Molecular Sequence Data
/ Peptides: chemistry / Peptides: immunology / Peptides:
metabolism / PrPC Proteins: immunology / PrPC Proteins:
metabolism / PrPSc Proteins: immunology / PrPSc Proteins:
metabolism / Protein Conformation / Complementarity
Determining Regions (NLM Chemicals) / Peptides (NLM
Chemicals) / PrPC Proteins (NLM Chemicals) / PrPSc Proteins
(NLM Chemicals) / J (WoSType)},
cin = {INB-2},
ddc = {570},
cid = {I:(DE-Juel1)VDB805},
pnm = {Funktion und Dysfunktion des Nervensystems},
pid = {G:(DE-Juel1)FUEK409},
shelfmark = {Biochemistry $\&$ Molecular Biology / Immunology},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:18973947},
UT = {WOS:000263429500004},
doi = {10.1016/j.molimm.2008.07.023},
url = {https://juser.fz-juelich.de/record/2682},
}