with only a handful of biocatalysts available to this end. We have increased the spectrum of carboxylate-reducing enzymes (CARs) with the sequence of a fungal CAR fromNeurosporacrassa OR74A (NcCAR). NcCAR was efficiently expressed in E. coli using an autoinduction protocol at low temperature. It was purified and characterized in vitro, revealing a broad substrate acceptance, a pH optimum at pH 5.5-6
羧酸的酶促还原还处于初期,只有少数几种生物催化剂可用于此目的。我们已经利用来自神经孢霉OR74A(NcCAR)的真菌CAR的序列增加了羧酸盐还原酶(CARs)的谱图。NcCAR在低温下使用自动诱导方案在大肠杆菌中有效表达。对其进行了纯化和体外表征,显示了广泛的底物接受性,最适pH值为5.5-6.0,Tm为45°C和副产物焦磷酸盐的抑制作用(可通过添加焦磷酸酶来缓解)。NcCAR的合成效用已在使用大肠杆菌K-12 MG1655 RARE菌株进行全细胞生物转化中得到证实,目的是抑制过度还原为不想要的酒精。由戊酸(30 mM)以克规模制备芳香化合物胡椒醛,分离出的产率为92%,纯度> 98%。这对应于1.5g / L / h的生产率。
Piperidinyl derivates as modulators of chemokine receptor activity
申请人:——
公开号:US20040209879A1
公开(公告)日:2004-10-21
The invention provides compounds of formula (I), in which m, n, X, Y, R
1
, R
2
and R
3
are as defined in the specification; processes for their preparation; pharmaceutical compositions containing them; and their use in therapy.
1
Method and composition for controlling the growth of microorganisms
申请人:The Research Foundation of State University of New York
公开号:US04358443A1
公开(公告)日:1982-11-09
The composition comprises certain 5-alkylsalicylanilides and more particularly comprises the compounds encompassed by the following generic formula: ##STR1## Where Z is a substituted phenyl ring of from 6 to 30 carbon atoms including substituents, and R is a substituted or unsubstituted n-alkyl or phenyl group of from 4 to 30 carbon atoms including substituents. The preferred compositions of the invention have a partition coefficient greater than 4 and the substituted moieties in the phenyl ring of the Z group have a combined overall electron withdrawing effect on the phenyl ring of the Z group. The method of the invention comprises contacting a microorganism affected by the above composition with a sufficient concentration of the above composition for a sufficient time to inhibit the growth of the microorganism. The above compositions are effective antiseptics against a wide range of microorganisms, especially bacteria, and the compositions surprisingly are effective against microorganisms prevalent in dental plaque.