title: [Affinity chromatography of subtilisin on a sorbent with epsilon-aminocapronyl-alanyl-alanyl-D-leucylamide. Detection of a serine protease with unusual properties].
abstract: A biospecific sorbent obtained by attachment of epsilon-aminocapronyl-L-alanyl-L-alanyl-D-leucylamide to CNBr-activated Sepharose 4B has been used for affinity chromatography of various samples of subtilisin BPN', e.g. subtilisin A ("Serva"), Nagarse, A-50. Two active components were isolated from subtilisin A (Serva"), the major component corresponding to subtilisin BPN' and the minor component (SII) being a serine proteinase with low molecular weight (about 10000). The molecular weight and amino acid composition of SII as well as the kinetic parameters of its action on peptide substrates (p-nitroanilides of N-benzyloxycarbonyl-Gly-Gly-Leu, -Ala-Ala-Leu, -Gly-Gly-Phe, -Ala-Ala-Phe. The low molecular weight proteinase possesses a high affinity for the leucine residue in P1 position and alanine in P2 and P3 positions. The specificity of this proteinase differs from that of the main component.
mesh_terms: D002846:Chromatography, Affinity; D010450:Endopeptidases / Q000302:isolation & purification* / Q000378:metabolism; D007700:Kinetics; D008970:Molecular Weight; D013379:Substrate Specificity; D013381:Subtilisins / Q000302:isolation & purification* / Q000378:metabolism
chemical_list: D010450:Endopeptidases; D013381:Subtilisins
vernacular_title: Affinnaia khromatografiia subtil3ina na sorbente, sodepzhashchem amid epsilon-aminokapronil-alanil-alanil-D-leitsina. Obnaruzhenie serinovoĭ proteina3y s neobychnymi svoĭstvami.