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A classical enzyme active center motif lacks catalytic competence until modulated electrostatically.
The cysteine proteinase superfamily is a source of natural structural variants of value in the investigation of mechanism. It has long been considered axiomatic that catalytic competence of theseExpand
The activity of the tissue inhibitors of metalloproteinases is regulated by C-terminal domain interactions: a kinetic analysis of the inhibition of gelatinase A.
The cloning and expression of the full-length tissue inhibitor of metalloproteinase 2 (TIMP-2), delta 187-194TIMP-2, and delta 128-194TIMP-2 and the purification of these inhibitors and a cleavedExpand
Comparative studies on the 5-aminolaevulinic acid dehydratases from Pisum sativum, Escherichia coli and Saccharomyces cerevisiae.
5-Aminolaevulinic acid dehydratase (ALAD) is an essential enzyme in most organisms, catalysing an inaugural step in the tetrapyrrole biosynthetic pathway, the Knorr-type condensation reaction of twoExpand
A reporter group delivery system with both absolute and selective specificity for thiol groups and an improved fluorescent probe containing the 7-nitrobenzo-2-oxa-1,3-diazole moiety.
1. 4-(N-2-Aminoethyl2'-pyridyl disulphide)-7-nitrobenzo-2-oxa-1,3-diazole (compound I) was synthesized and evaluated as a fluorescent labelling reagent for thiol groups. 2. The design of compound (I)Expand
Demonstration that 1-trans-epoxysuccinyl-L-leucylamido-(4-guanidino) butane (E-64) is one of the most effective low Mr inhibitors of trypsin-catalysed hydrolysis. Characterization by kinetic analysis
1-trans-Epoxysuccinyl-L-leucylamido(4-guanidino)butane (E-64) was shown to inhibit beta-trypsin by a reversible competitive mechanism; this contrasts with the widely held view that E-64 is aExpand
Structural insights into substrate specificity and the anti beta-elimination mechanism of pectate lyase.
Pectate lyases harness anti beta-elimination chemistry to cleave the alpha-1,4 linkage in the homogalacturonan region of plant cell wall pectin. We have studied the binding of five pecticExpand
Mechanism of the reaction of papain with substrate-derived diazomethyl ketones. Implications for the difference in site specificity of halomethyl ketones for serine proteinases and cysteine
The reactions of papain (EC with substrate-derived diazomethyl ketones reported by Leary, Larsen, Watanabe & Shaw [Biochemistry (1977) 16, 5857--5861] are unusual in that (i) these reagentsExpand
Reactions of papain and of low-molecular-weight thiols with some aromatic disulphides. 2,2'-Dipyridyl disulphide as a convenient active-site titrant for papain even in the presence of other thiols.
1. The u.v.-spectral characteristics of 5,5'-dithiobis-(2-nitrobenzoic acid) (Nbs(2)), 2,2'-dipyridyl disulphide (2-Py-S-S-2-Py), 4,4'-dipyridyl disulphide (4-Py-S-S-4-Py), 5-mercapto-2-nitrobenzoicExpand
Characterization of retinaldehyde dehydrogenase 3.
RALDH3 (retinal dehydrogenase 3) was characterized by kinetic and binding studies, protein engineering, homology modelling, ligand docking and electrostatic-potential calculations. The majorExpand
A necessary modification to the preparation of papain from any high-quality latex of Carica papaya and evidence for the structural integrity of the enzyme produced by traditional methods.
A method of preparation of papain (EC from relatively soluble types of latex of Carica papaya, including spray-dried latex produced by a controlled and relatively mild process, was devised.Expand