Product Details

Purity

≥ 95% as determined by SDS-PAGE.

Endotoxin

Less than 1.0 EU/ug as determined by LAL method.

Activity

Measured by its binding ability in a functional ELISA. Immobilized Mouse Mertk at 2 μg/mL can bind anti-MERTK recombinant antibody（CSB-RA621519A1HU）, the EC₅₀ is 19.22-25.80 ng/mL.

Target Names

Mertk

Uniprot No.

Q60805

Alternative Names

(Proto-oncogene c-Mer)(Receptor tyrosine kinase MerTK)

Molecular Characterization

Species

Mus musculus (Mouse)

Source

Mammalian cell

Expression Region

19-497aa

Target Protein Sequence

GGTAEKWEETELDQLFSGPLPGRLPVNHRPFSAPHSSRDQLPPPQTGRSHPAHTAAPQVTSTASKLLPPVAFNHTIGHIVLSEHKNVKFNCSINIPNTYQETAGISWWKDGKELLGAHHSITQFYPDEEGVSIIALFSIASVQRSDNGSYFCKMKVNNREIVSDPIYVEVQGLPYFIKQPESVNVTRNTAFNLTCQAVGPPEPVNIFWVQNSSRVNEKPERSPSVLTVPGLTETAVFSCEAHNDKGLTVSKGVHINIKVIPSPPTEVHILNSTAHSILVSWVPGFDGYSPLQNCSIQVKEADRLSNGSVMVFNTSASPHLYEIQQLQALANYSIAVSCRNEIGWSAVSPWILASTTEGAPSVAPLNITVFLNESNNILDIRWTKPPIKRQDGELVGYRISHVWESAGTYKELSEEVSQNGSWAQIPVQIHNATCTVRIAAITKGGIGPFSEPVNIIIPEHSKVDYAPSSTPAPGNTDSM

Mol. Weight

55.0 kDa

Protein Length

Partial

Tag Info

C-terminal 10xHis-tagged

Form

Lyophilized powder
Note: We will preferentially ship the format that we have in stock, however, if you have any special requirement for the format, please remark your requirement when placing the order, we will prepare according to your demand.

Buffer

Lyophilized from a 0.2 μm filtered 20 mM Tris-HCl, 0.5 M NaCl, 6% Trehalose, pH 8.0

Reconstitution

We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Please reconstitute protein in deionized sterile water to a concentration of 0.1-1.0 mg/mL.We recommend to add 5-50% of glycerol (final concentration) and aliquot for long-term storage at -20°C/-80°C. Our default final concentration of glycerol is 50%. Customers could use it as reference.

Troubleshooting and FAQs

Protein FAQs

Storage Condition

Store at -20°C/-80°C upon receipt, aliquoting is necessary for mutiple use. Avoid repeated freeze-thaw cycles.

Shelf Life

The shelf life is related to many factors, storage state, buffer ingredients, storage temperature and the stability of the protein itself.
Generally, the shelf life of liquid form is 6 months at -20°C/-80°C. The shelf life of lyophilized form is 12 months at -20°C/-80°C.

Lead Time

Basically, we can dispatch the products out in 3-7 working days after receiving your orders. Delivery time may differ from different purchasing way or location, please kindly consult your local distributors for specific delivery time.

Notes

Repeated freezing and thawing is not recommended. Store working aliquots at 4°C for up to one week.

Datasheet & COA

Please contact us to get it.

Description

MerTK plays a central role in efferocytosis and microglial phagocytosis, making it a key target in neuroscience and innate immunity research. This recombinant mouse MerTK encompasses the extracellular domain (aa 19–497), preserving the ligand-binding Ig-like and fibronectin type III regions critical for receptor-ligand interaction studies. Mammalian cell expression ensures native-like glycosylation and proper folding, as confirmed by functional ELISA demonstrating binding to an anti-MerTK recombinant antibody with an EC50 of 19.22–25.80 ng/mL—validated performance that supports use in ligand-binding assays, blocking antibody screening, therapeutic antibody epitope mapping, and affinity characterization by SPR or BLI. With purity exceeding 95% by SDS-PAGE and endotoxin levels below 1.0 EU/μg, this C-terminal His-tagged construct satisfies the quality criteria typical for drug discovery inhibitor screening and as a positive control in binding assays.

Target Background

Function

Receptor tyrosine kinase that transduces signals from the extracellular matrix into the cytoplasm by binding to several ligands including LGALS3, TUB, TULP1 or GAS6. Regulates many physiological processes including cell survival, migration, differentiation, and phagocytosis of apoptotic cells (efferocytosis). Ligand binding at the cell surface induces autophosphorylation of MERTK on its intracellular domain that provides docking sites for downstream signaling molecules. Following activation by ligand, interacts with GRB2 or PLCG2 and induces phosphorylation of MAPK1, MAPK2, FAK/PTK2 or RAC1. MERTK signaling plays a role in various processes such as macrophage clearance of apoptotic cells, platelet aggregation, cytoskeleton reorganization and engulfment. Functions in the retinal pigment epithelium (RPE) as a regulator of rod outer segments fragments phagocytosis. Plays also an important role in inhibition of Toll-like receptors (TLRs)-mediated innate immune response by activating STAT1, which selectively induces production of suppressors of cytokine signaling SOCS1 and SOCS3.

Gene References into Functions

These results suggest that MerTK inhibition impaired phagocytic function of the retina PMID: 29310530
MerTK does not play an essential role in the phagocytosis of S. aureus but attenuates inflammation induced by staphylococcal LTA through blocking NF-kappaB activation. PMID: 28528507
Tumor macrophage expression of Mertk is a therapeutic target to prevent tumor recurrence following radiation therapy. PMID: 27602953
Hypercapnic Acidosis Regulates Mer Tyrosine Kinase Receptor Shedding and Activity. PMID: 29286859
GC B cell-intrinsic sensing of self-RNA, but not self-DNA, from dead cells in GCs drives enhanced GC responses in Mer(-/-) mice. Mer loss in dendritic cells promotes enhanced T cell activation and proinflammatory cytokine production. Mer immunoregulatory signaling in APCs regulates B cell selection and autoimmunity. The phagocytic and immunomodulatory functions of Mer regulate GC responses preventing autoimmunity. PMID: 29118245
this study shows that viral infection sensitizes fetal membranes by MERTK Inhibition PMID: 28916522
Monocyte-induced MerTK cleavage on proreparative MHCII(LO) cardiac macrophages is a novel contributor to myocardial ischemic reperfusion injury. PMID: 28851810
evidence that proteolytic cleavage of the macrophage efferocytosis receptor c-Mer tyrosine kinase (MerTK) reduces efferocytosis and promotes plaque necrosis and defective resolution. PMID: 28067670
these results suggest, for the first time, that MerTK is an intracellular negative feedback regulator that inhibits the inflammatory response of lipoteichoic acid -stimulated macrophages PMID: 27419619
the reciprocal activation of Axl and Mer receptor tyrosine kinases has a major impact on the outcome of renal inflammation. PMID: 27527599
Reduced transcription of Mertk, rather than differences in MERTK protein structure, determines the reduced efficiency of apoptotic cell clearance in the Aath4a(DBA/DBA) mice, which, in turn, contributes to their increased susceptibility to atherosclerosis. PMID: 28473436
Axl, Mertk and Tyro3 receptors are not required for Zika virus entry and infection. PMID: 28423319
Signaling through the Mer proto-oncogene tyrosine kinase (MerTK) receptor in cultured macrophages and in sterile inflammation in vivo promotes specialized proresolving mediator (SPM) biosynthesis by a mechanism involving an increase in the cytoplasmic:nuclear ratio of a key SPM biosynthetic enzyme, 5-lipoxygenase. PMID: 27199481
These studies define the clearance of infected, apoptotic neutrophils by dendritic cells and Mer receptor signaling as central to the early immune evasion strategies of L. major. PMID: 26658192
Tyro3 gene dosage modulates Mertk-associated retinal degeneration, provide strong evidence for a direct role for TYRO3 in RPE phagocytosis, and suggest that an eQTL can modify a recessive Inherited photoreceptor degenerations. PMID: 26656104
Activation of Mertk synergized with interferon-beta to tighten cell junctions and prevent virus transit across brain microvascular endothelial cells. PMID: 26523970
results establish TAM receptors as both controllers of microglial physiology and potential targets for therapeutic intervention in central nervous system disease PMID: 27049947
Loss of Mertk alters expression of micrornas in retinal pigment epithelial cells. PMID: 25604732
These results suggest that TAM receptors support NSCs survival, proliferation and differentiation by regulating expression of neurotrophins, especially the nerve growth factor. PMID: 25514676
Mertk deficiency affects not only phagocytosis but also cell shape and migration PMID: 25617898
The results indicate that Axl and Mer receptors cooperatively regulate the systemic immune tolerance to male germ cell antigens. PMID: 25403570
Enhanced Mer signaling during the recovery phase increases the abundance and activity of LXR to inactivate the inflammatory response in macrophages PMID: 25714463
nuclear receptor agonists increase MerTK and Axl expression on plaque-associated immune cells, consequently licensing their phagocytic activity and promoting plaque clearance. PMID: 25904803
Mertk expression is required for optimal B-cell antigen presentation, which is, in turn, required in this model for optimal T cell activation and subsequent T cell-dependent B cell differentiation. PMID: 24768065
adiponectin elicited Mer expression and Mer-dependent efferocytosis in macrophages similar to cells stimulated with C1q. PMID: 24942043
Optimal TAM signaling requires coincident TAM ligand engagement of both its receptor and the phospholipid phosphatidylserine regulating TAM receptor tyrosine kinases Tyro3, Axl, and Mer and their ligands Gas6 and Protein S. PMID: 25265470
data suggest that MerTK cleavage contributes to the acute regulation of RPE phagocytosis by limiting POS binding to the cell surface. PMID: 25538233
Inhibition of the Gas6 receptor Mer or therapeutic targeting of Gas6 by warfarin reduced myeloma burden and improved survival in a systemic model of myeloma. PMID: 25102945
Mer mediates quiescence and chemotherapy resistance in a CNS co-culture model and causes CNS infiltration in immunodeficient mice. PMID: 25428221
Data indicate that TAM receptor tyrosine kinases Axl and Mer had distinct roles as phagocytic receptors. PMID: 25194421
Data indicate that MerTK, a receptor kinase, was essential for the engulfment of pyrenocytes by the central macrophages at erythroblastic islands. PMID: 24659633
Data collectively and directly link efferocytosis to wound healing in the heart and identify Mertk as a significant link between acute inflammation resolution and organ function. PMID: 23836795
the engulfment of apoptotic cells by resident peritoneal macrophages proceeds in two steps: binding to Tim4, a PtdSer receptor, followed by MerTK-mediated cell engulfment PMID: 24515440
Axl and Mer (TAM) receptor tyrosine kinases (RTKs) developed persistent inflammatory liver damage resembling AIH. Tyro3(-/-)Axl(-/-)Mer(-/-) triple mutant (TAM(-/-)) mice exhibited chronic hepatitis PMID: 23799121
Adult brain neurogenesis is reduced in the hippocampus of the Tyro3-/-Axl-/-Mertk-/- triple-knockout & Axl-/-Mertk-/- double-knockout mouse brains, but not in single Mertk-/- knockouts. PMID: 24244024
Chronic systemic inflammation and autoimmune disorders in the Tyro3, Axl and Mertk knockout mice cause neuronal damage and death. PMID: 23840307
studies reveal a novel role for astrocytes in mediating synapse elimination in the developing and adult brain, identify MEGF10 and MERTK as critical proteins in the synapse remodelling underlying neural circuit refinement PMID: 24270812
Data indicate the two phagocytic proteins, Mer receptor tyrosine kinase (MerTK) and Milk fat globule EGF-like factor 8 (MFG-E8), were transiently up-regulated by macrophages/microglia after focal brain ischemia in vivo. PMID: 24101459
Data indicate that azoxymethane (AOM) and dextran sulfate sodium (DSS)-induced inflammation-associated cancer is exacerbated in mice lacking Axl and Mer receptor tyrosine kinases. PMID: 23878224
MerTK signaling may suppress antitumor immunity through suppression of CD8+ T lymphocyte proliferation. PMID: 23867499
Mer deficiency in knockout mice results in long-term accumulation of apoptotic cells primarily in germinal centers and not in the T cell zone, marginal zone, or red pulp areas of the spleen. PMID: 23319738
Results demonstrate that Protein S and Gas6 function as independent, bona fide Mer ligands, and are, to a first approximation, interchangeable with respect to Mer-driven phagocytosis in the retina. PMID: 23259948
Mer of the TAM-family receptors is responsible for mediating transcriptional HGF production through a RhoA-dependent pathway. PMID: 22740630
These results suggest that tubby is a ligand to facilitate microglial phagocytosis through MerTK for the maintenance of CNS homeostasis. PMID: 22884297
Inhibiting Mer receptor tyrosine kinase suppresses STAT1, SOCS1/3, and NF-kappaB activation and enhances inflammatory responses in lipopolysaccharide-induced acute lung injury. PMID: 22427680
Novel insight into the mechanism of TAM RTKs (Tyro3, Axl, Mer receptor tyrosine kinases)in regulating male fertility. PMID: 19602523
A TRIF-mediated pattern recognition receptor signaling cascade requires NADPH oxidase to activate PKCdelta and then p38, culminating in ADAM17-mediated proteolysis of MerTK. PMID: 21828049
TNF family members play a role in protecting photoreceptors of Mertk(nmf12) homozygotes from cell death. PMID: 21436282
ERG from mer(kd) mice of different ages showed inner retinal dysfunction in mer(kd) mice. This and faster degeneration in mer(kd) mice may produce retinal environment unresponsive to neuroprotection from subretinal electrical stimulation. PMID: 21467171
disrupted expression leads to enhanced marginal zone B-cell responses PMID: 20822883

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Subcellular Location

Membrane; Single-pass type I membrane protein.

Protein Families

Protein kinase superfamily, Tyr protein kinase family, AXL/UFO subfamily

Tissue Specificity

Expressed predominantly in the hematopoietic lineages: macrophages, NK cells, NKT cells, dendritic cells and platelets.

Database Links

KEGG: mmu:17289

STRING: 10090.ENSMUSP00000014505

UniGene: Mm.239655

Code	CSB-MP723346MO
Abbreviation	Recombinant Mouse Mertk protein, partial (Active)
MSDS	MSDS Datasheet
Size	$148
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Image	(Tris-Glycine gel) Discontinuous SDS-PAGE (reduced) with 5% enrichment gel and 15% separation gel. Activity Measured by its binding ability in a functional ELISA. Immobilized Mouse Mertk at 2 μg/ml can bind anti-MERTK recombinant antibody（CSB-RA621519A1HU）, the EC₅₀ is 19.22-25.80 ng/mL. Biological Activity Assay
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Recombinant Mouse Tyrosine-protein kinase Mer (Mertk), partial (Active)

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