Zusammenfassung
Die reaktiven Zentren und C-terminalen Sequenzen dreier Trypsin-Chymotrypsin-Inhibitoren aus Bockshornkleesamen (TFI-B2, TFI-N2 und TFIA8) wurden durch chemische Modifizierung sowie Abbau der nativen und enzymatisch modifizierten Inhibitoren mit Carboxypeptidase bestimmt. TFI-B2 enthält Lysin im trypsin- und Leucin im chymotrypsin-reaktiven Zentrum sowie-(Lys)-Phe-Leu-Ile als C-terminale Sequenz. TFI-N2 hat Arginin im trypsin- und Leucin im chymotrypsin-reaktiven Zentrum sowie-(Tyr)-Lys-Ile-Leu im C-Terminus. TFI-A8 enthält zwei Arginine, eines in jedem der beiden reaktiven Zentren. Mindestens eines dieser Zentren, obgleich hauptsächlich gegen Trypsin gerichtet, kann auch in geringerem Umfang Chymotrypsin binden. Die C-terminale Sequenz von TFI-A8 ist-(Leu)-Phe-Ile-Arg. Diese Ergebnisse bestätigen, daß alle drei Bockshornklee-Inhibitoren zur Familie der Bowman-Birk-Proteinaseinhibitoren gehören.
Summary
The reactive sites and the C-terminal sequences of three trypsin chymotrypsin inhibitors from fenugreek seeds (TFI-B2, TFI-N2, and TFI-A8) were determined by chemical modification and carboxypeptidase degradation of native und enzymatically modified inhibitors. TFI-B2 contained lysine and leucine in the trypsin- and chymotrypsin-reactive sites, respectively, and -(Lys)-Phe-Leu-Ile was the C-terminal sequence. TFI-N2 possessed arginine and leucine in the trypsinand chymotrypsin-reactive sites, respectively, and -(Tyr)-Lys-Ile-Leu at the C-terminus. TFI-A8 contained two arginines, one in each of the two reactive sites. At least one of these sites, although mainly directed against trypsin, could also bind some chymotrypsin. -(Leu)-Phe-Ile-Arg was found to be the C-terminus in TFI-A8. These results confirmed that all three fenugreek inhibitors belong to the Bowman-Birk proteinase inhibitor family.
References
Weder JKP; Haussner K (1989) Fenugreek proteinase inhibitors: isolation, characterization, and significance. In: FECS, Working Party on Food Chem (eds) Agriculture, food chemistry and the consumer, Proc EURO FOOD CHEM V, Versailles/France Sept 27–29, 1989, vol 1. INRA, Paris, pp 52–56
Weder JKP, Haußner K (1991) Z Lebensm Unters Forsch 192:455–459
Weder JKP, Haußner K (1991) Z Lebensm Unters Forsch (in press)
Haussner K, Weder JKP (1989) Specific and sensitive detection of proteinase inhibitors after electrophoresis. In: FECS, Working Party on Food Chem (eds) Agriculture, food chemistry and the consumer, Proc EURO FOOD CHEM V, Versailles/France Sept 27–29, 1989, vol 1. INRA, Paris, pp 185–189
Weder JKP, Mueller R (1989) J Food Biochem 13:81–103
Mueller R, Weder JKP (1989) J Food Biochem 13:39–63
Krahn J, Stevens FC (1970) Biochemistry 9:2646–2652
Goerg A, Postel W, Westermeier R (1982) Z Lebensm Unters Forsch 174:282–285
Blakesley RW, Boezi JA (1977) Anal Biochem 82:580–582
Uriel J, Berges J (1968) Nature (London) 218:578–580
Hirs CHW (1967) Performic acid oxidation. In: Colowick SP, Kaplan NO (eds) Methods Enzymol 11. Academic Press, New York, pp 197–199
Hayashi R, Moore S, Stein WH (1973) J Biol Chem 248:2296–2302
Beyreuther K, Böhmer H, Dimroth P (1978) Eur J Biochem 87:101–110
Liener IE, Kakade ML (1980) Protease inhibitors. In: Liener IE (ed) Toxic constituents of plant foodstuffs, 2nd edn. Academic Press, New York, pp 7–71
Laskowski Jr M, Kato I (1980) Annu Rev Biochem 49:593–626
Ikenaka T, Norioka S (1986) Bowman-Birk family serine proteinase inhibitors. In: Barrett AJ, Salvesen G (eds) Proteinase inhibitors. Elsevier, Amsterdam, pp 361–374
Belitz H-D, Weder JKP (1990) Food Rev Int 6:151–211
Weder JKP (1991) Plant protease inhibitors: chemical and kinetic aspects. In: Oliveira B, Sgarbieri VC (eds) Lectins and inhibitors of pancreatic proteases and amylases, Proc 1st Braz Congr Proteins, Campinas/SP (Brazil) March 4–9, 1990, vol 1. Editora UNICAMP, Campinas, pp 29–55 (in press)
Hory H-D, Weder JKP (1976) Z Lebensm Unters Forsch 162:349–356
Weder JKP, Kahleyß R (unpublished)
Norioka S, Ikenaka T (1984) J Biochem (Tokyo) 96:1155–1164
Odani S, Ikenaka T (1977) J Biochem (Tokyo) 82:1523–1531
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Weder, J.K.P., Haußner, K. Inhibitors of human and bovine trypsin and chymotrypsin in fenugreek (Trigonella foenum-graecum L.) seeds. Z Lebensm Unters Forch 193, 242–246 (1991). https://doi.org/10.1007/BF01199974
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DOI: https://doi.org/10.1007/BF01199974