- Catalog number
- A01697-2
- Size / count
- 100 µg/Vial
- Dry ice
- No
- Hazardous
- No
- Discontinued
- No
- Background
- Myosin light chain kinase, smooth muscle also known as kinase-related protein (KRP) or telokin is an enzyme that in humans is encoded by the MYLK gene. This gene, a muscle member of the immunoglobulin gene superfamily, encodes myosin light chain kinase which is a calcium/calmodulin dependent enzyme. This kinase phosphorylates myosin regulatory light chains to facilitate myosin interaction with actin filaments to produce contractile activity. This gene encodes both smooth muscle and nonmuscle isoforms. In addition, using a separate promoter in an intron in the 3' region, it encodes telokin, a small protein identical in sequence to the C-terminus of myosin light chain kinase, that is independently expressed in smooth muscle and functions to stabilize unphosphorylated myosin filaments. A pseudogene is located on the p arm of chromosome 3. Four transcript variants that produce four isoforms of the calcium/calmodulin dependent enzyme have been identified as well as two transcripts that produce two isoforms of telokin.
- Synonyms
- Myosin light chain kinase, smooth muscle; MLCK; smMLCK; Kinase-related protein; KRP; Telokin; Myosin light chain kinase, smooth muscle, deglutamylated form; MYLK; MLCK; MLCK1; MYLK1
- Gene Name
- MYLK
- Gene ID
- 4638
- UniProt
- Q15746
- Host
- Rabbit
- Reactivity
- Human, Rat
- Cross Reactivity
- No cross-reactivity with other proteins.
- Immunogen
- E. coli-derived human MYLK recombinant protein (Position: D1441-D1709) .
- Clonality
- Polyclonal
- Tissue Specificity
- Smooth muscle and non-muscle isozymes are expressed in a wide variety of adult and fetal tissues and in cultured endothelium with qualitative expression appearing to be neither tissue- nor development-specific. Non-muscle isoform 2 is the dominant splice variant expressed in various tissues. Telokin has been found in a wide variety of adult and fetal tissues. Accumulates in well differentiated enterocytes of the intestinal epithelium in response to tumor necrosis factor (TNF) .
- Applications
- ELISA, ICC/IF, IHC, WB
- Field of Research
- Cardiovascular, Contractility, Cytoskeleton, Cytoskeleton/ECM, Motor Proteins, Myosin, Protein Phosphorylation, Ser/Thr Kinases, Signal Transduction
- Purification
- Immunogen affinity purified.
- Concentration
- Adding 0.2 ml of distilled water will yield a concentration of 500 μg/ml.
- Form
- Lyophilized
- Reconstitution
- Add 0.2ml of distilled water will yield a concentration of 500ug/ml.
- Function
- Calcium/calmodulin-dependent myosin light chain kinase implicated in smooth muscle contraction via phosphorylation of myosin light chains (MLC) . Also regulates actin-myosin interaction through a non-kinase activity. Phosphorylates PTK2B/PYK2 and myosin light-chains. Involved in the inflammatory response (e.g. apoptosis, vascular permeability, leukocyte diapedesis), cell motility and morphology, airway hyperreactivity and other activities relevant to asthma. Required for tonic airway smooth muscle contraction that is necessary for physiological and asthmatic airway resistance. Necessary for gastrointestinal motility. Implicated in the regulation of endothelial as well as vascular permeability, probably via the regulation of cytoskeletal rearrangements. In the nervous system it has been shown to control the growth initiation of astrocytic processes in culture and to participate in transmitter release at synapses formed between cultured sympathetic ganglion cells. Critical participant in signaling sequences that result in fibroblast apoptosis. Plays a role in the regulation of epithelial cell survival. Required for epithelial wound healing, especially during actomyosin ring contraction during purse-string wound closure. Mediates RhoA- dependent membrane blebbing. Triggers TRPC5 channel activity in a calcium-dependent signaling, by inducing its subcellular localization at the plasma membrane. Promotes cell migration (including tumor cells) and tumor metastasis. PTK2B/PYK2 activation by phosphorylation mediates ITGB2 activation and is thus essential to trigger neutrophil transmigration during acute lung injury (ALI) . May regulate optic nerve head astrocyte migration. Probably involved in mitotic cytoskeletal regulation. Regulates tight junction probably by modulating ZO-1 exchange in the perijunctional actomyosin ring. Mediates burn-induced microvascular barrier injury; triggers endothelial contraction in the development of microvascular hyperpermeability by phosphorylating MLC. Essential for intestinal barrier dysfunction. Mediates Giardia spp.-mediated reduced epithelial barrier function during giardiasis intestinal infection via reorganization of cytoskeletal F-actin and tight junctional ZO-1. Necessary for hypotonicity-induced Ca (2+) entry and subsequent activation of volume-sensitive organic osmolyte/anion channels (VSOAC) in cervical cancer cells. Responsible for high proliferative ability of breast cancer cells through anti-apoptosis.
- References & Citations
- 1. Entrez Gene: MYLK myosin, light chain kinase. 2. Connell LE, Helfman DM (2007) . Myosin light chain kinase plays a role in the regulation of epithelial cell survival. J. Cell. Sci. 119 (Pt 11) : 2269–81.
- Storage Conditions
- Store at -20°C for one year from date of receipt. After reconstitution, at 4°C for one month. It can also be aliquotted and stored frozen at -20°C for six months. Avoid repeated freeze-thaw cycles.
- Calculated Molecular Weight
- 211 kDa
- Observed Molecular Weight
- 135 kDa
- Specificity
- No cross reactivity with other proteins.
- Gene Name Synonym
- Myosin light chain kinase
- Subcellular Location
- Cytoplasm. Cell projection, lamellipodium. Cleavage furrow. Cytoplasm, cytoskeleton. Localized to stress fibers during interphase and to the cleavage furrow during mitosis.
- Isotype
- Rabbit IgG
- Contents
- Each vial contains 4mg Trehalose, 0.9mg NaCl and 0.2mg Na2HPO4.
