The antisense homology box: a new motif within proteins that encodes biologically active peptides.
Amphiphilic peptides approximately fifteen amino acids in length and their corresponding antisense peptides exist within protein molecules. These regions (termed antisense homology boxes) are separated by approximately fifty amino acids. Because many sense-antisense peptide pairs have been reported to recognize and bind to each other, antisense homology boxes may be involved in folding, chaperoning and oligomer formation of proteins. The antisense homology box-derived peptide CALSVDRYRAVASW, a fragment of human endothelin A receptor, proved to be a specific inhibitor of endothelin peptide (ET-1) in a smooth muscle relaxation assay. The peptide was able to block endotoxin-induced shock in rats as well. Our finding of endothelin receptor inhibitor among antisense homology box-derived peptides indicates that searching proteins for this new motif may be useful in finding biologically active peptides.
Baranyi
L
L
Choju Medical Institute, Noyori Fukushimura Hospital, Toyohashi, Japan.
Campbell
W
W
Ohshima
K
K
Fujimoto
S
S
Boros
M
M
Okada
H
H
D000595:Amino Acid Sequence; D000818:Animals; D003198:Computer Simulation; D016373:DNA, Antisense / Q000235:genetics*; D015195:Drug Design; D016232:Endothelins / Q000037:antagonists & inhibitors; D004731:Endotoxins / Q000633:toxicity; D006801:Humans; D008958:Models, Molecular; D018832:Molecular Chaperones / Q000737:chemistry / Q000235:genetics; D008969:Molecular Sequence Data; D009131:Muscle, Smooth, Vascular / Q000187:drug effects; D010446:Peptide Fragments / Q000737:chemistry* / Q000235:genetics / Q000494:pharmacology; D011485:Protein Binding; D011487:Protein Conformation; D017510:Protein Folding; D017434:Protein Structure, Tertiary; D051381:Rats; D044022:Receptor, Endothelin A; D017466:Receptors, Endothelin / Q000737:chemistry / Q000235:genetics; D017386:Sequence Homology, Amino Acid; D012772:Shock, Septic / Q000139:chemically induced / Q000517:prevention & control; D013329:Structure-Activity Relationship
D016373:DNA, Antisense; D016232:Endothelins; D004731:Endotoxins; D018832:Molecular Chaperones; D010446:Peptide Fragments; D044022:Receptor, Endothelin A; D017466:Receptors, Endothelin