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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Enzymology

Background:

  • Protein phosphorylation typically occurs on oxygen atoms (Ser, Thr, Tyr).
  • Phosphoramidation on nitrogen atoms (His, Lys, Arg) is less understood due to modification instability and analytical challenges.
  • Enzyme activities for N-phosphoramidate formation/hydrolysis were noted in the 1950s, but enzymes are only recently characterized.

Purpose of the Study:

  • To review current knowledge on enzymes that hydrolyze protein N-phosphoramidates.
  • To discuss the structure, activities, and biological roles of these enzymes.
  • To highlight chemical tools used for investigating N-phosphoramidate modifications.

Main Methods:

  • Literature review of existing research on N-phosphoramidate-hydrolyzing enzymes.
  • Analysis of enzyme structures, activities, and biological functions.
  • Examination of chemical and biochemical tools used in the field.

Main Results:

  • Several enzymes responsible for N-phosphoramidate hydrolysis have been identified and functionally characterized.
  • Novel research tools have facilitated recent advancements in understanding these modifications.
  • The biological significance of N-phosphoramidates is increasingly being revealed.

Conclusions:

  • Enzymes hydrolyzing protein N-phosphoramidates are critical for regulating these modifications.
  • Continued research, aided by advanced tools, is essential for fully understanding their roles.
  • This area of post-translational modification holds significant potential for future discoveries.