Cleavage specificity of the serine protease of Aeromonas sobria, a member of the kexin family of subtilases.
Subtilisin-like proteases have been grouped into six families based on a sequence of the catalytic domain. One of the six is the kexin family, of which furin is a representative protease. All members of the kexin family, except one, are from eukaryotes. The one prokaryotic protease is a serine protease of Aeromonas sorbria (ASP). Here, we examined the substrate specificity of ASP based on the cleavage of short peptides. The results showed that ASP preferentially cleaves the peptide bond following two basic residues, one of which is Lys, but not the bond following a single basic residue. This indicates that the tertiary structure around the catalytic domain of ASP resembles, but is not identical to that of furin. Prekallikrein was cleaved into four fragments by ASP, indicating that the protein must be cleaved at specific sequences.
Department of Pharmacogenetics, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan.
Hidetomo
H
Kobayashi
Eizo
E
Takahashi
Keiji
K
Oguma
Yoshio
Y
Fujii
Hiroyasu
H
Yamanaka
Tomoe
T
Negishi
Sakae
S
Arimoto-Kobayashi
Takao
T
Tsuji
Keinosuke
K
Okamoto
D000333:Aeromonas / Q000737:chemistry* / Q000201:enzymology*; D000595:Amino Acid Sequence; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D002853:Chromatography, Liquid / Q000379:methods; D045683:Furin / Q000378:metabolism; D006801:Humans; D013058:Mass Spectrometry / Q000379:methods; D019151:Peptide Library; D011288:Prekallikrein / Q000378:metabolism; D012697:Serine Endopeptidases / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism*; D013379:Substrate Specificity
D019151:Peptide Library; D011288:Prekallikrein; D012697:Serine Endopeptidases; D045683:Furin