A compound (in particular, a phosphagen) of l-arginine with phosphoric acid containing the phosphoamide bond; a source of energy in the contraction of muscle in invertebrates, corresponding to phosphocreatine in the muscles of vertebrates. Compare: phosphocreatine.
Synonym(s): arginine phosphate
Farlex Partner Medical Dictionary © Farlex 2012
References in periodicals archive ?
Through its function as a catalyst for the hydrolysis of phosphoarginine to yield ATP, AK could contribute to the energetic requirement for the active transport of ions during osmoregulation (Towle & Weihrauch 2001, Holt & Kinsey 2002).
This increase on day 1 may be due to the regeneration of ATP through the action of the adenylate kinase enzyme, or to the utilization of the phosphoarginine phosphagen in a reaction catalyzed by the arginine kinase enzyme, as has been reported for other species, such as the abalone Haliotis discus (Watanabe et al., 1992) and the scallop Zygochlamys patagonica (Massa et al, 2001).
The attacking nucleophile need not be a nucleotide, because phosphoarginine and phosphogluconate can also cap an RNA catalyst.
Arginine kinase belongs to a class of kinases that plays a role in the maintenance of ATP levels by the phosphorylation of phosphoarginine in a wide variety of invertebrates, which then serves as a high energy source from which ATP can be rapidly replenished (Uda et al.
Force production during escape responses by Placopecten magelanicus is a sensitive indicator of handling stress: comparison with adductor muscle adenylate energy charge and phosphoarginine levels.
Phosphoarginine is commonly referred to as a phosphagen and represents an intermediate storage and transport form of energy in a wide variety of invertebrates.