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Hypophosphatemia is an electrolyte disorder in which there is a low level of phosphate in the blood. [1] Symptoms may include weakness, trouble breathing, and loss of appetite. [1]
The cause of cramping is unknown, but may be related to elevated lactate, increased calcium signaling across the sarcoplasmic reticulum caused by membrane instability from reduced levels of ATP, or increased levels of free adenosine. [9] Muscle weakness
Some people with a metabolic myopathy never develop symptoms due to the body's ability to produce enough ATP through alternative pathways (e.g. the majority of those with AMP-deaminase deficiency are asymptomatic [1] [21]). H 2 O + ATP → H + + ADP + P i + energy → muscle contraction [22] ATP is needed for muscle contraction by two processes:
Pyruvate kinase deficiency is an inherited metabolic disorder of the enzyme pyruvate kinase which affects the survival of red blood cells. [ 4 ] [ 5 ] Both autosomal dominant and recessive inheritance have been observed with the disorder; classically, and more commonly, the inheritance is autosomal recessive .
With ATP production deficient in mitochondria, there is an over-reliance on anaerobic glycolysis which leads to lactic acidosis either at rest or exercise-induced. [ 2 ] Primary mitochondrial myopathies are inherited, while secondary mitochondrial myopathies may be inherited (e.g. Duchenne's muscular dystrophy) [ 3 ] or environmental (e.g ...
Most useful ATP analogs cannot be hydrolyzed as ATP would be; instead, they trap the enzyme in a structure closely related to the ATP-bound state. Adenosine 5′-(γ-thiotriphosphate) is an extremely common ATP analog in which one of the gamma-phosphate oxygens is replaced by a sulfur atom; this anion is hydrolyzed at a dramatically slower rate ...
According to the Cleveland Clinic, some of the top symptoms of vitamin D deficiency in adults are fatigue, muscle weakness, and low mood, which can lead to feeling down and exhausted. So does it ...
HFI is caused by a deficiency of aldolase B. [5] A deficiency of aldolase B results in an accumulation of fructose-1-phosphate, and trapping of phosphate (fructokinase requires adenosine triphosphate (ATP)). The downstream effects of this enzyme block are the inhibition of glucose production and reduced regeneration of ATP. [5]