A possible alternative mechanism for the oxidation of formaldehyde to formate
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We describe two general methodologies, based on filter-sandwich assays, for isolating enzymic activities from a large repertoire of protein variants expressed in the cytoplasm of E. coli cells. The enzymes are released by the freezing and thawing of bacter ...
The emergence of drug-resistant variants is a serious side effect assocd. with acquired immune deficiency syndrome therapies based on inhibition of human immunodeficiency virus type 1 protease (HIV-1 PR). In these variants, compensatory mutations, usually ...
We present a new antibody-directed enzyme prodrug therapy strategy (ADEPT) based on a post-proline cleaving endopeptidase and prodrugs, in which cytotoxic moieties are linked to a proline-contg. peptide. Human prolyl endopeptidase was expressed in Escheric ...
In this issue of Chem. & Biol., the groups of Tawfik and Griffiths present fluorescence-activated cell sorting of double emulsions as a generally applicable screen for enzyme activity. This novel methodol. increases the throughput of a typical enzyme scree ...
Structure and dynamics of substrate binding (cefotaxime) to the catalytic pocket of the mononuclear zinc-beta-lactamase from Bacillus cereus are investigated by molecular dynamics simulations. The calculations, which are based on the hydrogen-bond pattern ...
Vibrio and Aeromonas spp. secrete an unusual 35-kDa lipase that shares several properties with mammalian lecithin-cholesterol acyltransferase. The Aeromonas hydrophila lipase contains two cysteine residues that form an intramolecular disulfide bridge. Here ...
Combinatorial mutagenesis was used to investigate the role of three key residues in cytochrome c peroxidase (CCP) from Saccharomyces cerevisiae, Arg48, Trp51, and Trp191, in control of the reactivity and selectivity of the heme-contg. enzyme. Libraries wer ...
Telomerase, a ribonucleoprotein acting as a reverse transcriptase, has been identified as a target for cancer drug discovery. The synthetic, non-nucleosidic compound, BIBR1532, is a potent and selective telomerase inhibitor capable of inducing senescence i ...
Poly(A) polymerase was purified 22,000-fold to homogeneity from a whole cell extract of Saccharomyces cerevisiae with a yield of 22%. The enzyme is a monomeric polypeptide with a denatured molecular weight of 63,000. Incorporation of labeled ATP into acid- ...
The aim of the invention is to improve existing amperometric sensors used to measure the quantity of a component present in a solution. This aim is reached by using a sensor provided with a measuring electrode (20) having at least one current collector (37 ...