Posttranslational Modifications: Regulation of Nitrogen Utilization and Signaling

Regulation of Sirtuin Function by Posttranslational Modifications

Sirtuins are homologs of the yeast silencing information regulator 2 protein, an NAD(+)-dependent (histone) deacetylase. In mammals seven different sirtuins, SIRT1-7, have been identified, which share a common catalytic core domain but possess distinct N- and C-terminal extensions. This core domain elicits NAD(+)-dependent deacetylase and in some cases also ADP-ribosyltransferase, demalonylase,...

Spatiotemporal regulation of posttranslational modifications in the DNA damage response.

A timely and accurate cellular response to DNA damage requires tight regulation of the action of DNA damage response (DDR) proteins at lesions. A multitude of posttranslational modifications (PTMs) of chromatin and chromatin-associated proteins coordinates the recruitment of critical proteins that dictate the appropriate DNA repair pathway and enable the actual repair of lesions. Phosphorylatio...

Regulation of Ryanodine Receptor Ion Channels Through Posttranslational Modifications.

Cysteine oxidative posttranslational modifications: emerging regulation in the cardiovascular system.

In the cardiovascular system, changes in oxidative balance can affect many aspects of cellular physiology through redox-signaling. Depending on the magnitude, fluctuations in the cell's production of reactive oxygen and nitrogen species can regulate normal metabolic processes, activate protective mechanisms, or be cytotoxic. Reactive oxygen and nitrogen species can have many effects including t...

SnapShot: p53 Posttranslational Modifications

P ho sp ho ry la ti o n N-Terminal: S6, S9, S15, T18, S20 ATM, DNAPK, • CK1 ERKs, ATR, p38 • kinase, mTOR, Chk1/Chk2, JNK, MAPKAP2, Hipk4 Activated by DNA damage, UV light, ionizing radiation, replicative senes• cence, or phosphatidylcholines. N-terminal phosphorylation causes p53 stabilization by inhibiting the p53• MDM2 interaction. Knockin mice carrying separate analogs to human Ser18/ • Ser...