PMID- 30408515 OWN - NLM STAT- MEDLINE DCOM- 20200226 LR - 20200226 IS - 1873-3913 (Electronic) IS - 0898-6568 (Linking) VI - 53 DP - 2019 Jan TI - Nitric oxide mediated redox regulation of protein homeostasis. PG - 348-356 LID - S0898-6568(18)30268-7 [pii] LID - 10.1016/j.cellsig.2018.10.019 [doi] AB - Nitric oxide is a versatile diffusible signaling molecule, whose biosynthesis by three NO synthases (NOS) is tightly regulated at transcriptional and posttranslational levels, availability of co-factors, and calcium binding. Above normal levels of NO have beneficial protective effects for example in the cardiovascular system, but also contribute to the pathophysiology in the context of inflammatory diseases, and to aging and neurodegeneration in the nervous system. The effect specificity relies on the functional and spatial specificity of the NOS isoenzymes, and on the duality of two major signaling mechanisms (i) activation of soluble guanylycylase (sGC)-dependent cGMP production and (ii) direct S-nitrosylation of redox sensitive cysteines of susceptible proteins. The present review summarizes the functional implications of S-nitrosylation in the context of proteostasis, and focuses on two NO target proteins, heat shock cognate of 70 kDa (Hsc70/HSPA8) and the ubiquitin 2 ligase (UBE2D), because both are modified on functionally critical cysteines and are key regulators of chaperone mediated and assisted autophagy and proteasomal protein degradation. SNO modifications of these candidates are associated with protein accumulations and adoption of a senescent phenotype of neuronal cells suggesting that S-nitrosylations of protein homeostatic machineries contribute to aging phenomena. CI - Copyright (c) 2018 Elsevier Inc. All rights reserved. FAU - Tegeder, Irmgard AU - Tegeder I AD - Institute of Clinical Pharmacology, Goethe University Hospital Frankfurt, Theodor Stern Kai 7, 60590 Frankfurt, Germany. Electronic address: tegeder@em.uni-frankfurt.de. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Review DEP - 20181105 PL - England TA - Cell Signal JT - Cellular signalling JID - 8904683 RN - 0 (HSC70 Heat-Shock Proteins) RN - 0 (Ubiquitin) RN - 31C4KY9ESH (Nitric Oxide) RN - EC 2.3.2.27 (Ubiquitin-Protein Ligases) SB - IM MH - Aging MH - Animals MH - HSC70 Heat-Shock Proteins/metabolism MH - Humans MH - Nitric Oxide/*metabolism MH - Oxidation-Reduction MH - *Proteostasis MH - Ubiquitin/metabolism MH - Ubiquitin-Protein Ligases/metabolism OTO - NOTNLM OT - Aging OT - Chaperone OT - Nitric oxide OT - Nitrosylation OT - Proteostasis OT - Ubiquitin EDAT- 2018/11/09 06:00 MHDA- 2020/02/27 06:00 CRDT- 2018/11/09 06:00 PHST- 2018/10/09 00:00 [received] PHST- 2018/10/27 00:00 [revised] PHST- 2018/10/29 00:00 [accepted] PHST- 2018/11/09 06:00 [pubmed] PHST- 2020/02/27 06:00 [medline] PHST- 2018/11/09 06:00 [entrez] AID - S0898-6568(18)30268-7 [pii] AID - 10.1016/j.cellsig.2018.10.019 [doi] PST - ppublish SO - Cell Signal. 2019 Jan;53:348-356. doi: 10.1016/j.cellsig.2018.10.019. Epub 2018 Nov 5.