JCI table of contents: Sept. 4, 2007

... built of many repeating units known as sarcomeres. As the proteins of the sarcomere are therefore crucial for muscle contraction, their synthesis, assembly, ... myopathy and hypertrophic cardiomyopathy because degradation of their sarcomere proteins by the ubiquitin proteasome system was reduced. Inhibitors of ...

Gene Mutations for Rare Heart Disease Also Found in Kids

... which can lead to sudden death. About 3 percent to 4 percent of adults have the condition. Most of the genes implicated in cardiac hypertrophy encode sarcomere proteins, which help the heart tighten and relax to pump blood. "Cardiac hypertrophy increases your risk of all types of negative cardiovascular ...

The structural basis of familial hypertrophic cardiomyopathy is revealed

... a structural basis for the change in function of the mutant myosin. Dr. Hanein illustrates how the conformational instability within the sarcomere affects ability of the heart to function properly and may lead to compensatory hypertrophy in cardiac muscle tissue, which is a trademark phenotype ...

Sarcomere in Biological News

Media highlights in the Dec. 15 issue of Biophysical Journal

... Shin'ichi Ishiwata, Waseda University Keywords: ADP-bound cross-bridges; cooperativity; dextran; lattice spacing; length-dependent activation; sarcomere Muscle is one of the most important organs in biological system, yet its regulatory mechanism is still not fully revealed because of its complex ...

The giant protein titin helps build muscles

... detailed image of the connections between the proteins they discovered that telethonin links the tails in a unique way that may give some clues to sarcomere assembly. The Gautel lab used advanced microscope techniques to watch the molecules link to each other in live cells. "We knew that telethonin ...

Sarcomere in Biological Technology

Amgen Exercises Option for Exclusive License to Cytokinetics' Cardiac Contractility Program That Includes CK-1827452

... structure composed of cardiac myosin, actin and a set of regulatory proteins, and is the fundamental unit of muscle contraction in the heart. The sarcomere represents one of the most thoroughly characterized protein machines in human biology. Current inotropic agents, such as beta-adrenergic receptor ...

Sarcomere in Biological Definition

Myosin

... cells (sometimes known as "muscle fibers"). Within the cells are myofibrils ; the basic unit of a the contractile apparatus of a myofibril is the sarcomere , which is composed of three different filament systems, the thin filaments assembled by actin proteins, the thick filament system consisting ...

Sarcomere in Biological Dictionary

Sarcomere

... A sarcomere (Greek sárx = "flesh", méros = ... and titin give stability and structure to the sarcomere . ... sarcomere ( ) n. One of the segments into which a fibril ...

Myofibrils

... in transversely cut cells. ... Spontaneous oscillation of tension and sarcomere length in skeletal myofibrils . ... Single myofibrils were isolated ... ... 3. myofibril - cylindrical bundle of myofilaments (proteins) ... sarcomere - segment of myofibril ... an array of myofibrils that are ...

Muscle

... Muscle ... Skeletal muscle fibers are also multinucleated, with the cell's nuclei located ... section of skeletal muscle is called a sarcomere ... Muscle , tissue or organ of the animal body characterized by the ability to ... Muscle - Wikipedia, the free encyclopedia ... ...

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