Posttranslational modification of indoleamine 2,3-dioxygenase

研究成果: Article査読

16 被引用数 (Scopus)

抄録

Protein posttranslational modifications (PTMs) perform essential roles in the biological regulation of a cell. PTMs are extremely important because they can change a protein's physical or chemical properties, conformation, activity, cellular location, or stability. In fact, most proteins are altered by the addition or removal of a chemical moiety on either an amino acid or the protein's N- or C-terminus. Some PTMs can be added and removed dynamically as a mechanism for reversibly controlling protein function. Thus, identifying the PTM sites is critical to fully understand the biological roles of any given protein. Mass spectrometry (MS) is a widely used analytical strategy to identify PTMs. We have used an automated two-dimensional liquid chromatography (LC) system coupled with electrospray ionization quadrupole ion-trap MS to identify PTMs for indoleamine 2,3-dioxygenase 1 (IDO1), one of the tryptophan catabolic enzymes. IDO1 promotes immune tolerance by suppressing local T-cell responses under various physiological and pathophysiological conditions, such as pregnancy in mammals, tumor resistance, autoimmunity, and chronic inflammation. Although many studies have demonstrated the biological importance of IDO activity, the PTMs of IDO enzymes remain largely unknown. Only a few important PTMs of IDO1 have been found, such as nitration, N-terminal acetylation, and phosphorylation. In this review, we analyze the PTMs of IDO1 using our twodimensional LC-MS/MS system, and provide an overview of our current understanding.

本文言語English
ページ(範囲)1777-1782
ページ数6
ジャーナルAnalytical and Bioanalytical Chemistry
403
7
DOI
出版ステータスPublished - 06-2012
外部発表はい

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Biochemistry

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