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Myosin, light chain 12B, regulatory

MLC20
The activity of nonmuscle myosin II (see MYH9; MIM 160775) is regulated by phosphorylation of a regulatory light chain, such as MRLC2. This phosphorylation results in higher MgATPase activity and the assembly of myosin II filaments (Iwasaki et al., 2001 [PubMed 11942626]).[supplied by OMIM, Mar 2008] (from NCBI)
Top mentioned proteins: 20-kDa, Rhodopsin, myosin light chain kinase, V1a, RhoA
Papers on MLC20
Attenuated platelet aggregation in patients with septic shock is independent from the activity state of myosin light chain phosphorylation or a reduction in Rho kinase-dependent inhibition of myosin light chain phosphatase.
New
Wilson et al., Adelaide, Australia. In Intensive Care Med Exp, 31 Dec 2015
Platelets contract when Ca(2+)-dependent myosin light chain kinase (MLCK) phosphorylates Ser19 of myosin light chain (MLC20), promoting actin-myosin cross-bridge cycling.
The Signaling Mechanism of Contraction Induced by ATP and UTP in Feline Esophageal Smooth Muscle Cells.
New
Sohn et al., Seoul, South Korea. In Mol Cells, 31 Aug 2015
Phosphorylation of MLC20 was determined by western blot analysis.
Bimodal effect of Oxidative Stress in Internal Anal Sphincter (IAS) Smooth Muscle.
New
Rattan et al., Jefferson, United States. In Am J Physiol Gastrointest Liver Physiol, 02 Aug 2015
This was evident by the increase in RhoA/ROCK in the particulate fractions, in ROCK activity, and in the levels of p(Thr696)-MYPT1 and p(Thr18/Ser19)-MLC20. Conversely, higher concentrations of LY83583 produced inhibitory effects on RhoA/ROCK.
A novel function of nuclear nonmuscle myosin regulatory light chain in promotion of xanthine oxidase transcription after myocardial ischemia/reperfusion.
New
Peng et al., Changsha, China. In Free Radic Biol Med, 30 Jun 2015
Nuclear myosin regulates gene transcription and this novel function might be modulated through phosphorylation of the myosin regulatory light chain (p-MLC20).
Inhibition of myosin light chain kinase reduces NADPH oxidase-mediated oxidative injury in rat brain following cerebral ischemia/reperfusion.
New
Luo et al., Changsha, China. In Naunyn Schmiedebergs Arch Pharmacol, May 2015
At the end of experiments, neurological function, infarct volume, cellular apoptosis, activities of MLCK and NOX, messenger RNA (mRNA) and protein expression of NOX (NOX1-NOX4), phosphorylation level of myosin regulatory light chain (MLC20) and hydrogen peroxide (H2O2) level were determined.
Inhibition of RhoA-dependent pathway and contraction by endogenous hydrogen sulfide in rabbit gastric smooth muscle cells.
New
Murthy et al., Richmond, United States. In Am J Physiol Cell Physiol, Apr 2015
The aim of this study was to analyze the expression of CSE and H2S function in the regulation of MLCP activity, 20-kDa regulatory light chain of myosin II (MLC20) phosphorylation, and contraction in isolated gastric smooth muscle cells.
The importance of complete tissue homogenization for accurate stoichiometric measurement of myosin light chain phosphorylation in airway smooth muscle.
New
Seow et al., Vancouver, Canada. In Can J Physiol Pharmacol, Feb 2015
The standard method for measuring the phosphorylation of the regulatory myosin light chain (MLC20) in smooth muscle is extraction of the light chain using a urea extraction buffer, urea-glycerol gel electrophoresis of the soluble portion of the extract (supernatant) and Western blot analysis.
The Effects of Lactobacillus acidophilus on the Intestinal Smooth Muscle Contraction through PKC/MLCK/MLC Signaling Pathway in TBI Mouse Model.
New
Zhu et al., Chongqing, China. In Plos One, Dec 2014
Mechanistically, the decreased concentration of MLCK, phospho-MLC20 and phospho-MYPT1 and increased concentration of MLCP and PKC were observed after TBI, and these events mediated by TBI were efficiently prevented by Lactobacillus acidophilus application.
Perinatal nicotine exposure increases angiotensin II receptor-mediated vascular contractility in adult offspring.
Zhang et al., Loma Linda, United States. In Plos One, 2013
KEY FINDINGS: Nicotine treatment enhanced Angitension II (Ang II)-induced vasoconstriction and 20-kDa myosin light chain phosphorylation (MLC20-P) levels.
Role of various kinases in muscarinic M3 receptor-mediated contraction of longitudinal muscle of rat colon.
Grider et al., In J Smooth Muscle Res, 2013
Phosphorylation of myosin light chain (MLC20) by MLC kinase (MLCK) is a prerequisite for contraction in both circular and longitudinal muscle cells.
Role of serine-threonine phosphoprotein phosphatases in smooth muscle contractility.
Review
Chan et al., Newcastle, Australia. In Am J Physiol Cell Physiol, 2013
The degree of phosphorylation of myosin light chain 20 (MLC20) is a major determinant of force generation in smooth muscle.
Myosin regulatory light chain diphosphorylation slows relaxation of arterial smooth muscle.
GeneRIF
Walsh et al., Calgary, Canada. In J Biol Chem, 2012
Findings conclude that phosphorylation at Thr(18) decreases the rates of LC(20) dephosphorylation and smooth muscle relaxation compared with LC(20) phosphorylated exclusively at Ser(19).
Phosphorylation of myosin II regulatory light chain controls its accumulation, not that of actin, at the contractile ring in HeLa cells.
GeneRIF
Hosoya et al., Hiroshima, Japan. In Exp Cell Res, 2012
phosphorylated MRLC temporally controls its own accumulation, but not that of actin, in cultured mammalian cells.
Diphosphorylated but not monophosphorylated myosin II regulatory light chain localizes to the midzone without its heavy chain during cytokinesis.
GeneRIF
Hosoya et al., Hiroshima, Japan. In Biochem Biophys Res Commun, 2012
These results suggest that 2P-MRLC has a role different from that of 1P-MRLC at the midzone, and is not a subunit of myosin II.
Analysis of the role of Ser1/Ser2/Thr9 phosphorylation on myosin II assembly and function in live cells.
GeneRIF
Egelhoff et al., Cleveland, United States. In Bmc Cell Biol, 2010
The study data show that manipulation of the activation sites (Thr18/Ser19) significantly alters myosin II function in a number of these assays while manipulation of the putative inhibitory sites (Ser1/Ser2/Thr9) does not.
Prefrontal cortex shotgun proteome analysis reveals altered calcium homeostasis and immune system imbalance in schizophrenia.
GeneRIF
Turck et al., São Paulo, Brazil. In Eur Arch Psychiatry Clin Neurosci, 2009
Using shotgun mass spectrometry, we found this protein differentially expressed in the dorsolateral prefrontal cortex from patients with schizophrenia.
Role of non-kinase activity of myosin light-chain kinase in regulating smooth muscle contraction, a review dedicated to Dr. Setsuro Ebashi.
Review
Kohama et al., Maebashi, Japan. In Biochem Biophys Res Commun, 2008
The kinase activity is mediated by the catalytic domain that phosphorylates the myosin light-chain of 20kDa (MLC20), activating smooth muscle myosin to interact with actin.
Sensitized airway smooth muscle plasticity and hyperreactivity: a review.
Review
Fust et al., Winnipeg, Canada. In Can J Physiol Pharmacol, 2007
Nevertheless, we did find that content and total activity of smooth muscle myosin light chain kinase (smMLCK) and the abundance of its message were greater; this would explain the increased MLC20 phosphorylation.
Signaling for contraction and relaxation in smooth muscle of the gut.
Review
Murthy, Richmond, United States. In Annu Rev Physiol, 2005
Phosphorylation of Ser19 on the 20-kDa regulatory light chain of myosin II (MLC20) by Ca2+/calmodulin-dependent myosin light-chain kinase (MLCK) is essential for initiation of smooth muscle contraction.
Signal-transduction pathways that regulate smooth muscle function I. Signal transduction in phasic (esophageal) and tonic (gastroesophageal sphincter) smooth muscles.
Review
Biancani et al., Providence, United States. In Am J Physiol Gastrointest Liver Physiol, 2005
The steps linking activation of PKC to myosin light chain (MLC20) phosphorylation and contraction, however, have not been clearly defined for LES, Eso, or other smooth muscles.
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