Novel Phosphorylation Sites and Reduced Phosphorylation Levels in Human Cardiac MyBP-C from Failing Hearts
نویسندگان
چکیده
منابع مشابه
Active Inhibitor-1 Maintains Protein Hyper-Phosphorylation in Aging Hearts and Halts Remodeling in Failing Hearts
Impaired sarcoplasmic reticulum calcium cycling and depressed contractility are key characteristics in heart failure. Defects in sarcoplasmic reticulum function are characterized by decreased SERCA2a Ca-transport that is partially attributable to dephosphorylation of its regulator phospholamban by increased protein phosphatase 1 activity. Inhibition of protein phosphatase 1 through activation o...
متن کاملPKA Phosphorylation Dissociates FKBP12.6 from the Calcium Release Channel (Ryanodine Receptor) Defective Regulation in Failing Hearts
The ryanodine receptor (RyR)/calcium release channel on the sarcoplasmic reticulum (SR) is the major source of calcium (Ca2+) required for cardiac muscle excitation-contraction (EC) coupling. The channel is a tetramer comprised of four type 2 RyR polypeptides (RyR2) and four FK506 binding proteins (FKBP12.6). We show that protein kinase A (PKA) phosphorylation of RyR2 dissociates FKBP12.6 and r...
متن کاملEvolution of Human Phosphorylation Sites
Phosphorylation of proteins plays key roles in many intracellular signal pathways [3]. Gain or loss of phosphorylation sites of proteins during evolution may result in changes in signal transduction pathways. For example, FOXP2, a gene involved in speech and language, was reported to gain a potential target site for phosphorylation in humans after the human-chimpanzee divergence [2]. Here, we r...
متن کاملIncreased cardiac myocyte progenitors in failing human hearts.
BACKGROUND Increasing evidence, derived mainly from animal models, supports the existence of endogenous cardiac renewal and repair mechanisms in adult mammalian hearts that could contribute to normal homeostasis and the responses to pathological insults. METHODS AND RESULTS Translating these results, we isolated small c-kit+ cells from 36 of 37 human hearts using primary cell isolation techni...
متن کاملHeme levels are increased in human failing hearts.
OBJECTIVES The goal of this study was to characterize the regulation of heme and non-heme iron in human failing hearts. BACKGROUND Iron is an essential molecule for cellular physiology, but in excess it facilitates oxidative stress. Mitochondria are the key regulators of iron homeostasis through heme and iron-sulfur cluster synthesis. Because mitochondrial function is depressed in failing hea...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Biophysical Journal
سال: 2012
ISSN: 0006-3495
DOI: 10.1016/j.bpj.2011.11.3038