Abstract
A preparative method for purification of a novel protease from the psychrotolerant Gram-negative microorganism Serratia proteamaculans (PSP) was developed using affinity chromatography on BPTI-Sepharose. It yielded electrophoretically homogeneous PSP preparation of 60 kD. The PSP properties (temperature and pH stability, high catalytic efficiency) indicate that this enzyme can be defined as a psychrophilic protease. Inhibitory analysis together with substrate specificity indicates that the studied PSP exhibits properties of serine trypsin-like and Zn-dependent protease.
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Abbreviations
- ATEE:
-
Nα-acetyl-L-tyrosine ethyl ester
- BAPNA:
-
Nα-benzoyl-DL-arginine p-nitroanilide
- BPTI:
-
bovine pancreatic trypsin inhibitor
- DFP:
-
diisopropylfluorophosphate
- DMSO:
-
dimethylsulfoxide
- DTDP:
-
4,4′-dithiodipyridine
- PMSF:
-
phenylmethylsulfonyl fluoride
- PSP:
-
Serratia proteamaculans protease
- STI:
-
soybean trypsin inhibitor
- TLCK:
-
Nα-p-tosyl-L-lysyl-chloromethyl-ketone
- Z-Lys-S-Bzl:
-
Nα-benzyloxycarbonyl-L-lysine thiobenzyl ester
- buffer A:
-
0.1 M Tris-HCl, pH 8.0, 50 mM CaCl2
- buffer B:
-
0.1 M Tris-HCl, pH 8.0
- buffer C:
-
0.1 M Tris-HCl, pH 9.0, 50 mM CaCl2, 1 mM MgCl2
- buffer D:
-
10 mM Hepes-KOH, pH 7.5, 1 mM MgCl2
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Original Russian Text © A. G. Mikhailova, V. V. Likhareva, R. F. Khairullin, N. L. Lubenets, L. D. Rumsh, I. V. Demidyuk, S. V. Kostrov, 2006, published in Biokhimiya, 2006, Vol. 71, No. 5, pp. 697–706.
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Mikhailova, A.G., Likhareva, V.V., Khairullin, R.F. et al. Psychrophilic trypsin-type protease from Serratia proteamaculans . Biochemistry (Moscow) 71, 563–570 (2006). https://doi.org/10.1134/S0006297906050166
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DOI: https://doi.org/10.1134/S0006297906050166