STRUCTURE THE PROLINE UTILIZATION A PROLINE DEHYDROGENASE DOMAIN (PUTA86-630) INACTIVATED WITH N-PROPARGYLGLYCINE OXIDOREDUCTASE, PROLINE UTILIZATION A, PUTA, FLAVOENZYME, MECHANISM-BASED INACTIVATION, DNA-BINDING, FAD, FLAVOPROTEIN, MULTIFUNCTIONAL ENZYME, NAD, PROLINE METABOLISM, REPRESSOR, TRANSCRIPTION, TRANSCRIPTION REGULATION 3ITG