Neutralization of multiple staphylococcal superantigens by a single-chain protein consisting of affinity-matured, variable domain repeats.
Staphylococcus aureus secretes various toxins that act as superantigens by stimulating a large fraction of the host's T cells. Toxin binding to variable domains of T cell receptor beta chains (Vbeta) leads to massive release of inflammatory molecules and potentially to toxic shock syndrome (TSS). Previously, we generated soluble forms of different Vbeta domains with a high affinity for binding superantigens. However, a broader spectrum antagonist is required for the neutralization of multiple toxins. In the present study, we expressed Vbeta domains in tandem as a single-chain protein and neutralized the clinically important superantigens staphylococcal enterotoxin B and TSS toxin-1 with a single agent.
Yang
Xi
X
Department of Biochemistry, University of Illinois, Urbana, Illinois 61801, USA.
Buonpane
Rebecca A
RA
Moza
Beenu
B
Rahman
A K M Nur-ur
AK
Wang
Ningyan
N
Schlievert
Patrick M
PM
McCormick
John K
JK
Sundberg
Eric J
EJ
Kranz
David M
DM
D000942:Antigens, Bacterial / Q000276:immunology*; D001427:Bacterial Toxins / Q000276:immunology; D004768:Enterotoxins / Q000276:immunology; D011948:Receptors, Antigen, T-Cell / Q000235:genetics / Q000276:immunology*; D013211:Staphylococcus aureus / Q000276:immunology*; D018089:Superantigens / Q000276:immunology*
D000942:Antigens, Bacterial; D001427:Bacterial Toxins; D004768:Enterotoxins; D011948:Receptors, Antigen, T-Cell; D018089:Superantigens; C030107:enterotoxin F, Staphylococcal; C031818:enterotoxin B, staphylococcal