Download MendeleyThe YdiU Domain Modulates Bacterial Stress Signaling through Mn 2+ -Dependent UMPylation.
Yang, Y., Yue, Y., Song, N., Li, C., Yuan, Z., Wang, Y., Ma, Y., Li, H., Zhang, F., Wang, W., Jia, H., Li, P., Li, X., Wang, Q., Ding, Z., Dong, H., Gu, L., Li, B.(2020) Cell Rep 32: 108161-108161
- PubMed: 32966796
- DOI: https://doi.org/10.1016/j.celrep.2020.108161
- Primary Citation of Related Structures:
6LNA - PubMed Abstract:
Sensing stressful conditions and adjusting the cellular metabolism to adapt to the environment are essential activities for bacteria to survive in variable situations. Here, we describe a stress-related protein, YdiU, and characterize YdiU as an enzyme that catalyzes the covalent attachment of uridine-5'-monophosphate to a protein tyrosine/histidine residue, an unusual modification defined as UMPylation. Mn 2+ serves as an essential co-factor for YdiU-mediated UMPylation. UTP and Mn 2+ binding converts YdiU to an aggregate-prone state facilitating the recruitment of chaperones. The UMPylation of chaperones prevents them from binding co-factors or clients, thereby impairing their function. Consistent with the recent finding that YdiU acts as an AMPylator, we further demonstrate that the self-AMPylation of YdiU padlocks its chaperone-UMPylation activity. A detailed mechanism is proposed based on the crystal structures of Apo-YdiU and YdiU-AMPNPP-Mn 2+ and on molecular dynamics simulation models of YdiU-UTP-Mn 2+ and YdiU-UTP-peptide. In vivo data demonstrate that YdiU effectively protects Salmonella from stress-induced ATP depletion through UMPylation.
Organizational Affiliation:
Key Laboratory of Rare and Uncommon Diseases, Department of Microbiology, Institute of Basic Medicine, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, Shandong 250062, China; School of Medicine and Life Sciences, University of Jinan-Shandong Academy of Medical Sciences, Jinan, Shandong 250062, China.
