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Immunological demonstration of a unique 34-dihydroxyphenylacetate 23-dioxygenase in soil Arthrobacter strains.

机译:在土壤节杆菌菌株中独特的34-二羟基苯乙酸23-二加氧酶的免疫学证明。

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摘要

Many bacteria biosynthesize 3,4-dihydroxyphenylacetate 2,3-dioxygenases for growth on aromatic acids, but gram-negative organisms have been most extensively studied. A gram-positive strain containing 2,3-dioxygenase activity was identified as Arthrobacter strain Mn-1. The 2,3-dioxygenase from strain Mn-1 was purified to homogeneity by fast protein liquid chromatography with a Mono Q anion-exchange column. Rabbit polyclonal antidioxygenase antibodies were prepared. Ouchterlony double-diffusion and Western blotting (immunoblotting) protocols were used to probe the distribution of the Mn-1 dioxygenase antigen in soil bacteria. Fourteen 2,3-dioxygenase-containing Bacillus and Pseudomonas strains did not contain immunologically cross-reactive proteins. Six of eight Arthrobacter strains contained 2,3-dioxygenase activity, and all of them produced cross-reactive proteins. The data presented here suggest that a unique type of dioxygenase is geographically widespread but is taxonomically confined to Arthrobacter soil bacteria.
机译:许多细菌生物合成3,4-二羟基苯乙酸2,3-二加氧酶以在芳香酸上生长,但是革兰氏阴性生物得到了最广泛的研究。含有2,3-二加氧酶活性的革兰氏阳性菌株被鉴定为节杆菌菌株Mn-1。通过带有Mono Q阴离子交换柱的快速蛋白质液相色谱,将菌株Mn-1中的2,3-二加氧酶纯化至均质。制备了兔多克隆抗双加氧酶抗体。使用双菌落扩散和蛋白质印迹(免疫印迹)方法来检测Mn-1双加氧酶抗原在土壤细菌中的分布。十四个包含2,3-二加氧酶的芽孢杆菌和假单胞菌菌株不包含免疫交叉反应蛋白。八株节杆菌菌株中的六株具有2,3-二加氧酶活性,并且它们全部产生交叉反应蛋白。这里提供的数据表明,独特类型的双加氧酶在地理上广泛分布,但在分类学上仅限于节杆菌土壤细菌。

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