3.4.14.4 C113S mutation of the cysteine residue 707596 3.4.14.4 C130S mutant, only existence of dimeric form 707596 3.4.14.4 C130S the mutant exhibits comparable enzymatic activity to the wild type protein -, 698782 3.4.14.4 C147A activity similar to wild type 649555 3.4.14.4 C176A 25-35% of wild type activity, resistant against p-chloro-mercuri-benzoate and N-ethylmaleimide 649555 3.4.14.4 C176E no enzymic activity 649555 3.4.14.4 C176G no enzymic activity 649555 3.4.14.4 C19A activity similar to wild type 649555 3.4.14.4 C450S residues Gly383 and Glu320 form significantly less hydrogen bonds with substrate Arg-Arg-2-naphthylamide than in the wild type enzyme 754693 3.4.14.4 C509A activity similar to wild type 649555 3.4.14.4 C518S mutation of the cysteine residue 707596 3.4.14.4 C519A activity similar to wild type 649555 3.4.14.4 C626S mutation of the cysteine residue 707596 3.4.14.4 C639S mutant, resistance against p-hydroxy-mercuribenzoate 707596 3.4.14.4 C654A activity similar to wild type 649555 3.4.14.4 C701A activity similar to wild type 649555 3.4.14.4 D372A residue Asp372 plays a crucial role in the large scale interdomain closure. During the MD simulation time, the variant remains more open than the wild type protein. Apparently, Ala is not as efficient as Asp in establishing the interdomain interactions 732223 3.4.14.4 D496G mutation in S2 subsite, mutant has lost selectivity due to the increase of the Km value. Mutant shows significantly decreased binding of peptides with N-terminal arginine, and of tynorphin 731407 3.4.14.4 G313A mutation detected in human cancer, strong decrease in activity. Mutation significantly increases the enzyme flexibility, particularly that of the binding site including the H450ELLGH455 motif, and influences the substrate interactions with the catalytic His568 755384 3.4.14.4 G313W mutation detected in human cancer, almost abolishes activity 755384 3.4.14.4 H450Y no activity 36186 3.4.14.4 H455Y no activity 36186 3.4.14.4 H578D mutation 122fold lowers the catalytic efficiency for Arg-Arg 2-naphthylamide hydrolysis, and 14fold decreases affinity for hydroxamate inhibitor Tyr-Phe-NHOH 732012 3.4.14.4 K638L mutation slightly increases the specificity constant for Arg-Arg 2-naphthylamide hydrolysis. The affinity for Tyr-Phe-NHOH, and activity for the substrates with uncharged P2 side chains such as Ala-Ala-, Ala-Arg- and Phe-Arg 2-naphthylamide are dramatically reduced 732012 3.4.14.4 Leu453del activity of mutant Cu(II)-del-DPP III, in which Leu453 is deleted from the metal-binding motif, is only 1-2% of the enzyme activity of del-DPP. The EPR spectra of Cu(II) del-DPP III do not change in the presence of excess Lys-Ala-beta-naphthylamide. The deletion of Leu453 from the HELLGH motif of rat DPP III leads to a complete loss of flexibility in the ligand geometry around the cupric ions 731219 3.4.14.4 additional information design of recombinant enzymes withh binding of Ets-1/Elk-1 proteins to binding motifs, increased enzyme expression 708494 3.4.14.4 additional information DPPIII6His, construct with hexahistidine 707596 3.4.14.4 Q451A no activity 36186 3.4.14.4 Q451D no activity 36186 3.4.14.4 Q508A no activity 36186 3.4.14.4 R510K mutation detected in human cancer, substitution mildly decreases enzyme activity for Arg-Arg-2-naphtylamide substrate 755384 3.4.14.4 R510Q mutation detected in human cancer, strong decrease in activity 755384 3.4.14.4 R510W mutation detected in human cancer, almost abolishes activity. Mutation significantly increases the enzyme flexibility, particularly that of the binding site including the H450ELLGH455 motif, and influences the substrate interactions with the catalytic His568 755384 3.4.14.4 R582Q mutant exhibits an order of magnitude higher activity with all four dipeptide derivatives examined, compared to the wild type, due to a change in the H-bond networking in the R582Q variant active-site region 732012 3.4.14.4 S504G mutation in S2 subsite, mutant does not show decreased binding of peptides with N-terminal arginine 731407 3.4.14.4 W300F mutant with slight increase in activity compared to wild-type enzyme 707660 3.4.14.4 W300L mutant with higher activity compared to wild-type enzyme 707660 3.4.14.4 Y318F the potential functional role of the well-conserved tyrosine 318 residue in the active center of human DPP III is investigated 683209 3.4.14.4 Y395F the potential functional role of the well-conserved tyrosine 395 residue in the active center of human DPP III is investigated 683209 3.4.14.4 Y644F the potential functional role of the well-conserved tyrosine 644 residue in the active center of human DPP III is investigated 683209