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由小肠结肠炎耶尔森菌高致病性岛编码的Irp9能够将分支酸转化为水杨酸,即耶尔森菌素的前体。

Irp9, encoded by the high-pathogenicity island of Yersinia enterocolitica, is able to convert chorismate into salicylate, the precursor of the siderophore yersiniabactin.

作者信息

Pelludat Cosima, Brem Daniela, Heesemann Jürgen

机构信息

Institut für Mikrobiologie, D-BIOL, ETHZ, 8092 Zürich, Switzerland.

出版信息

J Bacteriol. 2003 Sep;185(18):5648-53. doi: 10.1128/JB.185.18.5648-5653.2003.

Abstract

The Irp9 protein of Yersinia enterocolitica participates in the synthesis of salicylate, the precursor of the siderophore yersiniabactin. In Pseudomonas species, salicylate synthesis is mediated by two enzymes: isochorismate synthase and isochorismate pyruvate-lyase. Both enzymes are required for complementation of a Yersinia irp9 mutant. However, irp9 is not able to complement Escherichia coli entC for the production of enterobactin, which requires isochorismate as a precursor. These results suggest that Irp9 directly converts chorismate into salicylate.

摘要

小肠结肠炎耶尔森菌的Irp9蛋白参与了铁载体耶尔森菌素的前体水杨酸盐的合成。在假单胞菌属中,水杨酸盐的合成由两种酶介导:异分支酸合酶和异分支酸丙酮酸裂解酶。这两种酶都是小肠结肠炎耶尔森菌irp9突变体互补所必需的。然而,Irp9不能互补大肠杆菌entC以产生以异分支酸作为前体的肠杆菌素。这些结果表明,Irp9直接将分支酸转化为水杨酸盐。

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