Peptide ligands that bind IgM antibodies and block interaction with antigen.
We have selected a peptide-display phage library on IgM Abs and identified a panel of phage-expressing peptides that bind to IgM Abs in general, but not to Abs of other classes. A synthetic peptide corresponding to one of the displayed peptide sequences also binds to IgM Abs. The peptides bind to both soluble pentameric Abs and to monomeric cell-surface IgM. The phage-displayed and synthetic peptides inhibit the binding of IgM Abs to Ag. These peptides may create confounding artifacts when IgM Abs are used for epitope mapping studies. Nonetheless, the peptides may have both experimental and therapeutic utility.
Glee
P M
PM
Department of Microbiology, Montana State University, Bozeman 59717, USA. umbpg@montana.edu
Pincus
S H
SH
McNamer
D K
DK
Smith
M J
MJ
Burritt
J B
JB
Cutler
J E
JE
D000818:Animals; D000941:Antigens / Q000276:immunology* / Q000378:metabolism*; D017104:Bacteriophage M13 / Q000737:chemistry / Q000276:immunology / Q000378:metabolism; D001666:Binding Sites, Antibody; D001667:Binding, Competitive / Q000276:immunology; D003167:Complement Activation / Q000276:immunology; D007075:Immunoglobulin M / Q000737:chemistry / Q000378:metabolism*; D008024:Ligands; D051379:Mice; D009842:Oligopeptides / Q000276:immunology / Q000378:metabolism* / Q000494:pharmacology; D019151:Peptide Library; D011947:Receptors, Antigen, B-Cell / Q000378:metabolism; D014764:Viral Proteins / Q000276:immunology / Q000378:metabolism* / Q000494:pharmacology
D000941:Antigens; D007075:Immunoglobulin M; D008024:Ligands; D009842:Oligopeptides; D019151:Peptide Library; D011947:Receptors, Antigen, B-Cell; D014764:Viral Proteins