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Information on EC 2.7.11.18 - myosin-light-chain kinase and Organism(s) Rattus norvegicus and UniProt Accession P20689

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IUBMB Comments
Requires Ca2+ and calmodulin for activity. The 20-kDa light chain from smooth muscle myosin is phosphorylated more rapidly than any other acceptor, but light chains from other myosins and myosin itself can act as acceptors, but more slowly.
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This record set is specific for:
Rattus norvegicus
UNIPROT: P20689
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Word Map
The taxonomic range for the selected organisms is: Rattus norvegicus
The expected taxonomic range for this enzyme is: Eukaryota, Bacteria
Synonyms
mlck, myosin light chain kinase, myosin light-chain kinase, mlc kinase, smooth muscle myosin light chain kinase, smmlck, nmmlck, myosin kinase, cmlck, skmlck, more
SYNONYM
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
myosin light chain kinase
-
myosin light chain kinase, skeletal muscle
-
Ca2+-dependent kinase myosin light chain kinase
-
calcium/calmodulin-dependent myosin light chain kinase
-
-
-
-
cMLKCk
-
cardiac myosin light chain kinase
kinase, myosin light-chain (phosphorylating)
-
-
-
-
MLC kinase
-
-
MLC-kinase
-
-
myosin kinase
-
-
-
-
myosin light chain kinase
myosin light chain protein kinase
-
-
-
-
myosin light-chain kinase
-
-
-
-
obscurin-associated kinase
-
-
obscurin-MLCK-like kinase
-
-
skMLCK
-
skeletal muscle myosin light chain kinase
smMLCK
-
smooth muscle myosin light chain kinase
smooth-muscle-myosin-light-chain kinase
-
-
-
-
REACTION TYPE
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
phospho group transfer
-
-
-
-
SYSTEMATIC NAME
IUBMB Comments
ATP:[myosin light chain] O-phosphotransferase
Requires Ca2+ and calmodulin for activity. The 20-kDa light chain from smooth muscle myosin is phosphorylated more rapidly than any other acceptor, but light chains from other myosins and myosin itself can act as acceptors, but more slowly.
CAS REGISTRY NUMBER
COMMENTARY hide
51845-53-5
-
SUBSTRATE
PRODUCT                       
REACTION DIAGRAM
ORGANISM
UNIPROT
COMMENTARY
(Substrate) hide
LITERATURE
(Substrate)
COMMENTARY
(Product) hide
LITERATURE
(Product)
Reversibility
r=reversible
ir=irreversible
?=not specified
ATP + myosin light chain
ADP + myosin light chain phosphate
show the reaction diagram
ATP + myosin light chain
ADP + phosphorylated myosin light chain
show the reaction diagram
-
-
-
?
ATP + light chain myosin II
ADP + phosphorylated light chain myosin II
show the reaction diagram
-
-
-
-
?
ATP + myosin light chain
ADP + myosin light chain phosphate
show the reaction diagram
ATP + myosin regulatory light chain
ADP + myosin regulatory light chain phosphate
show the reaction diagram
-
-
-
-
?
ATP + obscurin
ADP + obscurin phosphate
show the reaction diagram
-
-
-
-
?
ATP + [myosin light chain]
ADP + [myosin light chain] phosphate
show the reaction diagram
additional information
?
-
NATURAL SUBSTRATE
NATURAL PRODUCT
REACTION DIAGRAM
ORGANISM
UNIPROT
COMMENTARY
(Substrate) hide
LITERATURE
(Substrate)
COMMENTARY
(Product) hide
LITERATURE
(Product)
REVERSIBILITY
r=reversible
ir=irreversible
?=not specified
ATP + myosin light chain
ADP + myosin light chain phosphate
show the reaction diagram
activated MLCK then phosphorylates the regulatory myosin light chains, triggering cross-bridge cycling and contraction, myosin light chain phosphorylation is increased under these conditions, suggesting that contraction would be potentiated by ablation of AMPK
-
-
?
ATP + myosin light chain
ADP + phosphorylated myosin light chain
show the reaction diagram
-
-
-
?
ATP + light chain myosin II
ADP + phosphorylated light chain myosin II
show the reaction diagram
-
-
-
-
?
ATP + myosin light chain
ADP + myosin light chain phosphate
show the reaction diagram
ATP + obscurin
ADP + obscurin phosphate
show the reaction diagram
-
-
-
-
?
ATP + [myosin light chain]
ADP + [myosin light chain] phosphate
show the reaction diagram
additional information
?
-
COFACTOR
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
IMAGE
Calmodulin
METALS and IONS
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
Ca2+
dependent on
INHIBITOR
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
IMAGE
ML-9
-
i.e. 1-(5-chloronaphthalene-1-sulfonyl)-1H-hexahydro-1,4-diazepine, inhibits MLCK and paracellular permeability increases in several intestinal epithelial models
phosphorylation
-
-
-
RKKYKYRRK-NH2
-
-
W-7
-
calmodulin/enzyme-specific inhibitor, attenuates cell migration in vivo
additional information
-
ACTIVATING COMPOUND
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
IMAGE
Calmodulin
dependent on
Calmodulin
additional information
-
KM VALUE [mM]
SUBSTRATE
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
IMAGE
0.073
ATP
-
30°C, pH 7.5
0.000002
Calmodulin
-
30°C, pH 7.5
0.018
myosin light chain
-
30°C, pH 7.5
additional information
additional information
-
SPECIFIC ACTIVITY [µmol/min/mg]
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
additional information
-
-
pH OPTIMUM
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
TEMPERATURE OPTIMUM
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
22 - 24
assay at
30
-
assay at
ORGANISM
COMMENTARY hide
LITERATURE
UNIPROT
SEQUENCE DB
SOURCE
SOURCE TISSUE
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
SOURCE
skeletal muscle
Manually annotated by BRENDA team
an embryonic thoracic aorta cell line
Manually annotated by BRENDA team
-
lateral
Manually annotated by BRENDA team
small resistance mesenteric artery
Manually annotated by BRENDA team
-
cMLCK is exclusively expressed in cardic muscle, smMLCK expresses in almost every tissue, including cardiac muscles
Manually annotated by BRENDA team
-
primary cell culture
Manually annotated by BRENDA team
-
ventricle
Manually annotated by BRENDA team
-
myofibroblast-like stellate cell line, previously called Ito cells, lipocytes, or fat-storing cells
Manually annotated by BRENDA team
-
smMLCK expresses in almost every tissue, including liver
Manually annotated by BRENDA team
-
a prostate cancer cell line
Manually annotated by BRENDA team
-
expression of obscurin-MLCK-like kinase is restricted to muscles in the myonucleus
Manually annotated by BRENDA team
-
expression analysis, overview
Manually annotated by BRENDA team
-
cultured hippocampal neurons
Manually annotated by BRENDA team
-
smMLCK expresses in almost every tissue, including plaeta
Manually annotated by BRENDA team
-
smMLCK expresses in almost every tissue, including spleen
Manually annotated by BRENDA team
-
smMLCK expresses in almost every tissue, including thymus
Manually annotated by BRENDA team
additional information
LOCALIZATION
ORGANISM
UNIPROT
COMMENTARY hide
GeneOntology No.
LITERATURE
SOURCE
-
exclusively
Manually annotated by BRENDA team
-
associated
Manually annotated by BRENDA team
-
of lateral amygdala
Manually annotated by BRENDA team
GENERAL INFORMATION
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
malfunction
physiological function
UNIPROT
ENTRY NAME
ORGANISM
NO. OF AA
NO. OF TRANSM. HELICES
MOLECULAR WEIGHT[Da]
SOURCE
SEQUENCE
LOCALIZATION PREDICTION?
MYLK2_RAT
610
0
65816
Swiss-Prot
other Location (Reliability: 1)
MOLECULAR WEIGHT
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
130000
short MLCK isozyme
136000
-
x * 136000, SDS-PAGE, enzyme from smooth muscle
138000
-
x * 138000, SDS-PAGE
220000
long MLCK isozyme
additional information
SUBUNIT
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
additional information
-
different molecular weights may be due to high sensitivity to proteolysis during purification
POSTTRANSLATIONAL MODIFICATION
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
phosphoprotein
-
PAK phosphorylation of MLCK by p21- activated kinase, a kinase activated by the Rho family of GTPases, can inhibit MLCK activity
PROTEIN VARIANTS
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
additional information
GENERAL STABILITY
ORGANISM
UNIPROT
LITERATURE
protease inhibitors stabilize during purification
-
repeated freeze-thawing decreases activity
-
STORAGE STABILITY
ORGANISM
UNIPROT
LITERATURE
-70°C, 1% bovine serum albumin, more than 2 months
-
PURIFICATION (Commentary)
ORGANISM
UNIPROT
LITERATURE
purified to homogeneity from a number of vertebrate muscles and partially purified from non-muscle tissues
-
CLONED (Commentary)
ORGANISM
UNIPROT
LITERATURE
isolation of cDNA
gene Myl12b, analysis of MLCK, L-type (CaV1.2), P/Q-type (CaV2.1), and T-type (CaV3.1) voltage-dependent Ca2+ channels and RPL32 mRNA expression by real-time quantitative-PCR
sequence and expression analysis and comparison, overview
-
EXPRESSION
ORGANISM
UNIPROT
LITERATURE
expression of myosin light chain kinase protein is rapidly increased by angiotensin II
-
REF.
AUTHORS
TITLE
JOURNAL
VOL.
PAGES
YEAR
ORGANISM (UNIPROT)
PUBMED ID
SOURCE
Roush, C.L.; Kennelly, P.J.; Glaccum, M.B.; Helfman, D.M.; Scott, J.D.; Krebs, E.G.
Isolation of the cDNA encoding rat skeletal muscle myosin light chain kinase. Sequence and tissue distribution
J. Biol. Chem.
263
10510-10516
1988
Rattus norvegicus (P20689)
Manually annotated by BRENDA team
Gallagher, P.J.; Herring, B.P.; Griffin, S.A.; Stull, J.T.
Molecular characterization of a mammalian smooth muscle myosin light chain kinase [published erratum appears in J Biol Chem 1992 May 5;267(13):9450]
J. Biol. Chem.
266
23936-23944
1991
Bos taurus, Gallus gallus, Oryctolagus cuniculus, Oryctolagus cuniculus (P29294), Rattus norvegicus
Manually annotated by BRENDA team
Bissonnette, M.; Kuhn, D.; de Lanerolle, P.
Purification and characterization of myosin light-chain kinase from the rat pancreas
Biochem. J.
258
739-747
1989
Rattus norvegicus
Manually annotated by BRENDA team
Conti, M.A.; Adelstein, R.S.
Purification and properties of myosin light chain kinases
Methods Enzymol.
196
34-47
1991
Bos taurus, Oryctolagus cuniculus, Homo sapiens, Meleagris gallopavo, Rattus norvegicus, Sus scrofa
Manually annotated by BRENDA team
Stull, J.T.; Nunnally, M.H.; Michnoff, C.H in
Calmoduline-dependent protein kinases
The Enzymes, 3rd. Ed. (Boyer, P. D. , Krebs, E. G. , eds. )
17
113-166
1986
Bos taurus, Canis lupus familiaris, Cavia porcellus, Gallus gallus, Homo sapiens, Meleagris gallopavo, Rattus norvegicus
-
Manually annotated by BRENDA team
Van Lierop, J.E.; Wilson, D.P.; Davis, J.P.; Tikunova, S.; Sutherland, C.; Walsh, M.P.; Johnson, J.D.
Activation of smooth muscle myosin light chain kinase by calmodulin. Role of Lys30 and Gly40
J. Biol. Chem.
277
6550-6558
2002
Gallus gallus, Rattus norvegicus
Manually annotated by BRENDA team
Yanase, M.; Ikeda, H.; Ogata, I.; Matsui, A.; Noiri, E.; Tomiya, T.; Arai, M.; Inoue, Y.; Tejima, K.; Nagashima, K.; Nishikawa, T.; Shibata, M.; Ikebe, M.; Rojkind, M.; Fujiwara, K.
Functional diversity between Rho-kinase- and MLCK-mediated cytoskeletal actions in a myofibroblast-like hepatic stellate cell line
Biochem. Biophys. Res. Commun.
305
223-228
2003
Rattus norvegicus
Manually annotated by BRENDA team
Gu, L.Z.; Hu, W.Y.; Antic, N.; Mehta, R.; Turner, J.R.; de Lanerolle, P.
Inhibiting myosin light chain kinase retards the growth of mammary and prostate cancer cells
Eur. J. Cancer
42
948-957
2006
Mus musculus, Rattus norvegicus
Manually annotated by BRENDA team
Zhu, H.; Zhang, X.; Zuo, L.; Zhou, Q.; Gui, S.; Wei, W.; Wang, Y.
Expression of myosin light chain kinase in kidney of streptozotocin-induced diabetic rats
Int. J. Mol. Sci.
7
510-518
2006
Rattus norvegicus
-
Manually annotated by BRENDA team
Tokuoka, H.; Goda, Y.
Myosin light chain kinase is not a regulator of synaptic vesicle trafficking during repetitive exocytosis in cultured hippocampal neurons
J. Neurosci.
26
11606-11614
2006
Rattus norvegicus
Manually annotated by BRENDA team
Lamprecht, R.; Margulies, D.S.; Farb, C.R.; Hou, M.; Johnson, L.R.; LeDoux, J.E.
Myosin light chain kinase regulates synaptic plasticity and fear learning in the lateral amygdala
Neuroscience
139
821-829
2006
Rattus norvegicus
Manually annotated by BRENDA team
Horman, S.; Morel, N.; Vertommen, D.; Hussain, N.; Neumann, D.; Beauloye, C.; El Najjar, N.; Forcet, C.; Viollet, B.; Walsh, M.P.; Hue, L.; Rider, M.H.
AMP-activated protein kinase phosphorylates and desensitizes smooth muscle myosin light chain kinase
J. Biol. Chem.
283
18505-18512
2008
Mus musculus, Gallus gallus (P11799), Gallus gallus, Rattus norvegicus (P20689)
Manually annotated by BRENDA team
Borisov, A.B.; Raeker, M.O.; Russell, M.W.
Developmental expression and differential cellular localization of obscurin and obscurin-associated kinase in cardiac muscle cells
J. Cell. Biochem.
103
1621-1635
2008
Homo sapiens, Mus musculus, Rattus norvegicus
Manually annotated by BRENDA team
Fajmut, A.; Brumen, M.
MLC-kinase/phosphatase control of Ca2+ signal transduction in airway smooth muscles
J. Theor. Biol.
252
474-481
2008
Rattus norvegicus
Manually annotated by BRENDA team
Feighery, L.M.; Cochrane, S.W.; Quinn, T.; Baird, A.W.; OToole, D.; Owens, S.E.; ODonoghue, D.; Mrsny, R.J.; Brayden, D.J.
Myosin light chain kinase inhibition: correction of increased intestinal epithelial permeability in vitro
Pharm. Res.
25
1377-1386
2008
Homo sapiens, Mus musculus, Mus musculus C57BL/6, Rattus norvegicus
Manually annotated by BRENDA team
Han, Y.J.; Hu, W.Y.; Piano, M.; de Lanerolle, P.
Regulation of myosin light chain kinase expression by angiotensin II in hypertension
Am. J. Hypertens.
21
860-865
2008
Rattus norvegicus
Manually annotated by BRENDA team
Takashima, S.
Phosphorylation of myosin regulatory light chain by myosin light chain kinase, and muscle contraction
Circ. J.
73
208-213
2009
Rattus norvegicus
Manually annotated by BRENDA team
Suzuki, T.; Nishimukai, M.; Takechi, M.; Taguchi, H.; Hamada, S.; Yokota, A.; Ito, S.; Hara, H.; Matsui, H.
The nondigestible disaccharide epilactose increases paracellular Ca absorption via Rho-associated kinase- and myosin light chain kinase-dependent mechanisms in rat small intestines
J. Agric. Food Chem.
58
1927-1932
2010
Rattus norvegicus
Manually annotated by BRENDA team
Martinsen, A.; Dessy, C.; Morel, N.
Regulation of calcium channels in smooth muscle: new insights into the role of myosin light chain kinase
Channels
8
402-413
2014
Rattus norvegicus (D3ZFU9), Rattus norvegicus Wistar (D3ZFU9)
Manually annotated by BRENDA team
Li, L.; Wu, X.; Yue, H.Y.; Zhu, Y.C.; Xu, J.
Myosin light chain kinase facilitates endocytosis of synaptic vesicles at hippocampal boutons
J. Neurochem.
138
60-73
2016
Rattus norvegicus (P18666)
Manually annotated by BRENDA team