A multicentric consortium study demonstrates that dimethylarginine dimethylaminohydrolase 2 is not a dimethylarginine dimethylaminohydrolase

Vinitha N. Ragavan, Pramod C. Nair, Natalia Jarzebska, Ramcharan Singh Angom, Luana Ruta, Elisa Bianconi, Silvia Grottelli, Natalia D. Tararova, Daniel Ryazanskiy, Steven R. Lentz, Sara Tommasi, Jens Martens-Lobenhoffer, Toshiko Suzuki-Yamamoto, Masumi Kimoto, Elena Rubets, Sarah Chau, Yingjie Chen, Xinli Hu, Nadine Bernhardt, Peter M. SpiethNorbert Weiss, Stefan R. Bornstein, Debabrata Mukhopadhyay, Stefanie M. Bode-Böger, Renke Maas, Ying Wang, Antonio Macchiarulo, Arduino A. Mangoni, Barbara Cellini, Roman N. Rodionov

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Abstract

Dimethylarginine dimethylaminohydrolase 1 (DDAH1) protects against cardiovascular disease by metabolising the risk factor asymmetric dimethylarginine (ADMA). However, the question whether the second DDAH isoform, DDAH2, directly metabolises ADMA has remained unanswered. Consequently, it is still unclear if DDAH2 may be a potential target for ADMA-lowering therapies or if drug development efforts should focus on DDAH2’s known physiological functions in mitochondrial fission, angiogenesis, vascular remodelling, insulin secretion, and immune responses. Here, an international consortium of research groups set out to address this question using in silico, in vitro, cell culture, and murine models. The findings uniformly demonstrate that DDAH2 is incapable of metabolising ADMA, thus resolving a 20-year controversy and providing a starting point for the investigation of alternative, ADMA-independent functions of DDAH2.

Original languageEnglish
Article number3392
Number of pages16
JournalNature Communications
Volume14
Issue number1
DOIs
Publication statusPublished - 9 Jun 2023

Keywords

  • Enzyme mechanisms
  • Hydrolases
  • Metabolism
  • Molecular modelling

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