Comparison of substituted 2-nitrophenol degradation by enzyme extracts and intact cells
摘要:
The first catabolic pathway enzyme, nitrophenol oxygenase, transforms o-nitrophenol (ONP) to catechol. Thirteen of 16 substituted nitrophenols tested were actively transformed by both enzyme preparations and intact cells yielding a wide range of K(m) (K(s)) and V(max). Individual chemicals in binary mixtures demonstrated competitive inhibition. Chemical and physical characteristics (electron withdrawal, size, and position of substitution on the 2-nitrophenol ring) affected degradation kinetics. The strongest correlations were between K(m) or V(max) values and electron withdrawal, though there was also evidence for effects relating to position and size of substitution on the aromatic ring. Kinetic parameters determined for enzyme preparations did not correlate to those determined for intact cells. Though enzyme reactivity ultimately determined whether a given chemical would be transformed, the transformation by intact cells was apparently affected by factors other than those directly impacting the initial catabolic enzyme.
[EN] GLUCAGON ANTAGONISTS/INVERSE AGONISTS<br/>[FR] ANTAGONISTES DE GLUCAGON/AGONISTES INVERSES
申请人:NOVO NORDISK AS
公开号:WO2000039088A1
公开(公告)日:2000-07-06
Non-peptide compounds comprising a central hydrazide motif and methods for the synthesis thereof. The compounds act to antagonize the action of the glucagon peptide hormone.
非肽类化合物包括中心腙基团和其合成方法。这些化合物的作用是拮抗葡萄糖肽激素的作用。
2-SUBSTITUTED CEPHEM COMPOUNDS
申请人:GLAXO GROUP LIMITED
公开号:US20150299223A1
公开(公告)日:2015-10-22
The present invention relates to 2-substituted cephem compounds of Formula (I) having a quaternary ammonium group on the 3-side chain, preferably together with a cathechol group, or pharmaceutically acceptable salts thereof, which exhibit potent antimicrobial spectrum against a variety of bacteria including Gram negative bacteria and/or Gram positive bacteria, corresponding pharmaceutical compositions, methods of making, treatment methods for bacterial infections or uses thereof.
Inhibitors of Hepatitis C virus NS3 serine protease
申请人:VERTEX PHARMACEUTICALS INCORPORATED
公开号:EP2314598A1
公开(公告)日:2011-04-27
The present invention relates to compounds, methods and pharmaceutical compositions for inhibiting proteases, particularly serine proteases, and more particularly HCV NS3 proteases. The compounds, and the compositions and_methods that utilize them, can be used, either alone or in combination to inhibit viruses, particularly HCV virus.
Inhibitors de serine proteases, especially of the NS3 protease of the hepatitis C virus
申请人:VERTEX PHARMACEUTICALS INCORPORATED
公开号:EP2409985A2
公开(公告)日:2012-01-25
The present invention relates to compounds, methods and pharmaceutical compositions for inhibiting proteases, particularly serine proteases, and more particularly HCV NS3 proteases. The compounds, and the compositions and methods that utilize them, can be used, either alone or in combination to inhibit viruses, particularly HCV virus.
NOVEL CEPHEM COMPOUND HAVING CATECHOL OR PSEUDO-CATECHOL STRUCTURE
申请人:Shionogi & Co., Ltd.
公开号:EP2703406A1
公开(公告)日:2014-03-05
The present invention provides a novel compound which has a wide antimicrobial spectrum, and in particular exhibits potent antimicrobial activity against beta-lactamase producing Gram negative bacteria. Specifically, the present invention provides a compound of the formula (I):
wherein each symbol is as defined in the specification,
or an amino-protected compound when the amino group is present on the ring in the 7-side chain, or a pharmaceutically acceptable salt thereof, and a pharmaceutical composition comprising the same.