Human LGR4 / Leucine-rich repeat-containing G-protein coupled receptor 4 ELISA Kit

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SKU:
HUFI01052
Product Type:
ELISA Kit
Size:
96 Assays
Uniprot:
Q9BXB1
Sensitivity:
46.875pg/ml
Range:
78.125-5000pg/ml
ELISA Type:
Sandwich ELISA, Double Antibody
Synonyms:
LGR4, Leucine-rich repeat-containing G-protein coupled receptor 4, GPR48, GPR48G protein-coupled receptor 48, G-protein coupled receptor 48, leucine-rich repeat containing G protein-coupled receptor 4
Reactivity:
Human
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Description

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Human LGR4 / Leucine-rich repeat-containing G-protein coupled receptor 4 ELISA Kit

LGR4 is a G-protein coupled receptor that binds R-spondins and activates the Wnt signalling pathway. The activation of the Wnt signalling pathway is required for the proper development of many body organs. The Assay Genie LGR4 ELISA is a highly sensitive assay for the quantitative measurement of LGR4 in serum, blood, plasma, cell culture supernatant and tissue samples.

Product Name:Human LGR4 / Leucine-rich repeat-containing G-protein coupled receptor 4 ELISA Kit
Product Code:HUFI01052
Size:96 Assays
Alias:LGR4, Leucine-rich repeat-containing G-protein coupled receptor 4, GPR48, GPR48G protein-coupled receptor 48, G-protein coupled receptor 48, leucine-rich repeat containing G protein-coupled receptor 4
Detection method:Sandwich ELISA, Double Antibody
Application:This immunoassay kit allows for the in vitro quantitative determination of Human LGR4 concentrations in serum plasma and other biological fluids.
Sensitivity:46.875pg/ml
Range:78.125-5000pg/ml
Storage:4°C for 6 months
Note:For Research Use Only
Recovery:Matrices listed below were spiked with certain level of Human LGR4 and the recovery rates were calculated by comparing the measured value to the expected amount of Human LGR4 in samples.
MatrixRecovery range(%)Average(%)
serum(n=5)91-10297
EDTA plasma(n=5)87-10593
UFH plasma(n=5)87-9490
Linearity:The linearity of the kit was assayed by testing samples spiked with appropriate concentration of Human LGR4 and their serial dilutions. The results were demonstrated by the percentage of calculated concentration to the expected.
Sample1:21:41:8
serum(n=5)88-102%91-102%92-104%
EDTA plasma(n=5)87-99%83-96%83-101%
UFH plasma(n=5)81-100%82-98%80-100%
CV(%):Intra-Assay: CV<8%
Inter-Assay: CV<10%
ComponentQuantityStorage
ELISA Microplate (Dismountable)8×12 strips4°C for 6 months
Lyophilized Standard24°C/-20°C
Sample/Standard Dilution Buffer20ml4°C
Biotin-labeled Antibody(Concentrated)120ul4°C (Protect from light)
Antibody Dilution Buffer10ml4°C
HRP-Streptavidin Conjugate(SABC)120ul4°C (Protect from light)
SABC Dilution Buffer10ml4°C
TMB Substrate10ml4°C (Protect from light)
Stop Solution10ml4°C
Wash Buffer(25X)30ml4°C
Plate Sealer5-

Other materials and equipment required:

  • Microplate reader with 450 nm wavelength filter
  • Multichannel Pipette, Pipette, microcentrifuge tubes and disposable pipette tips
  • Incubator
  • Deionized or distilled water
  • Absorbent paper
  • Buffer resevoir
UniprotQ9BXB1
UniProt Protein Function:LGR4: a leucine-rich repeat-containing G-protein-coupled receptor. Receptor for R-spondins, potent stimulators of adult stem cell proliferation. A Wnt receptor component that enhances Wnt signaling by soluble R-spondin proteins. Plays an essential role during homeostasis of the adult mouse intestine.
UniProt Protein Details:Protein type:GPCR, family 1; Membrane protein, integral; Membrane protein, multi-pass; Receptor, GPCR

Chromosomal Location of Human Ortholog: 11p14.1

Cellular Component: integral to plasma membrane; plasma membrane

Molecular Function:G-protein coupled receptor activity; protein binding; transmembrane receptor activity

Biological Process: bone mineralization; bone remodeling; circadian regulation of gene expression; negative regulation of cytokine secretion; negative regulation of toll-like receptor signaling pathway; osteoblast differentiation; spermatogenesis

Disease: Bone Mineral Density Quantitative Trait Locus 17

NCBI Summary:The protein encoded by this gene is a G-protein coupled receptor that binds R-spondins and activates the Wnt signaling pathway. This Wnt signaling pathway activation is necessary for proper development of many organs of the body. [provided by RefSeq, Oct 2016]
UniProt Code:Q9BXB1
NCBI GenInfo Identifier:212286375
NCBI Gene ID:55366
NCBI Accession:Q9BXB1.2
UniProt Secondary Accession:Q9BXB1,Q8N537, Q9NYD1, A6NCH3, G5E9B3,
UniProt Related Accession:Q9BXB1
Molecular Weight:104kDa
NCBI Full Name:Leucine-rich repeat-containing G-protein coupled receptor 4
NCBI Synonym Full Names:leucine rich repeat containing G protein-coupled receptor 4
NCBI Official Symbol:LGR4
NCBI Official Synonym Symbols:GPR48; BNMD17
NCBI Protein Information:leucine-rich repeat-containing G-protein coupled receptor 4
UniProt Protein Name:Leucine-rich repeat-containing G-protein coupled receptor 4
UniProt Synonym Protein Names:G-protein coupled receptor 48
Protein Family:Leucine-rich repeat-containing G-protein coupled receptor
UniProt Gene Name:LGR4

*Note: Protocols are specific to each batch/lot. For the correct instructions please follow the protocol included in your kit.

Before adding to wells, equilibrate the SABC working solution and TMB substrate for at least 30 min at 37°C. When diluting samples and reagents, they must be mixed completely and evenly. It is recommended to plot a standard curve for each test.

StepProtocol
1.Set standard, test sample and control (zero) wells on the pre-coated plate respectively, and then, record their positions. It is recommended to measure each standard and sample in duplicate. Wash plate 2 times before adding standard, sample and control (zero) wells!
2.Aliquot 0.1ml standard solutions into the standard wells.
3.Add 0.1 ml of Sample / Standard dilution buffer into the control (zero) well.
4.Add 0.1 ml of properly diluted sample ( Human serum, plasma, tissue homogenates and other biological fluids.) into test sample wells.
5.Seal the plate with a cover and incubate at 37 °C for 90 min.
6.Remove the cover and discard the plate content, clap the plate on the absorbent filter papers or other absorbent material. Do NOT let the wells completely dry at any time. Wash plate X2.
7.Add 0.1 ml of Biotin- detection antibody working solution into the above wells (standard, test sample & zero wells). Add the solution at the bottom of each well without touching the side wall.
8.Seal the plate with a cover and incubate at 37°C for 60 min.
9.Remove the cover, and wash plate 3 times with Wash buffer. Let wash buffer rest in wells for 1 min between each wash.
10.Add 0.1 ml of SABC working solution into each well, cover the plate and incubate at 37°C for 30 min.
11.Remove the cover and wash plate 5 times with Wash buffer, and each time let the wash buffer stay in the wells for 1-2 min.
12.Add 90 µl of TMB substrate into each well, cover the plate and incubate at 37°C in dark within 10-20 min. (Note: This incubation time is for reference use only, the optimal time should be determined by end user.) And the shades of blue can be seen in the first 3-4 wells (with most concentrated standard solutions), the other wells show no obvious color.
13.Add 50 µl of Stop solution into each well and mix thoroughly. The color changes into yellow immediately.
14. Read the O.D. absorbance at 450 nm in a microplate reader immediately after adding the stop solution.

When carrying out an ELISA assay it is important to prepare your samples in order to achieve the best possible results. Below we have a list of procedures for the preparation of samples for different sample types.

Sample TypeProtocol
SerumIf using serum separator tubes, allow samples to clot for 30 minutes at room temperature. Centrifuge for 10 minutes at 1,000x g. Collect the serum fraction and assay promptly or aliquot and store the samples at -80°C. Avoid multiple freeze-thaw cycles.

If serum separator tubes are not being used, allow samples to clot overnight at 2-8°C. Centrifuge for 10 minutes at 1,000x g. Remove serum and assay promptly or aliquot and store the samples at -80°C. Avoid multiple freeze-thaw cycles.

PlasmaCollect plasma using EDTA or heparin as an anticoagulant. Centrifuge samples at 4°C for 15 mins at 1000 × g within 30 mins of collection. Collect the plasma fraction and assay promptly or aliquot and store the samples at -80°C. Avoid multiple freeze-thaw cycles. Note: Over haemolysed samples are not suitable for use with this kit.
Urine & Cerebrospinal FluidCollect the urine (mid-stream) in a sterile container, centrifuge for 20 mins at 2000-3000 rpm. Remove supernatant and assay immediately. If any precipitation is detected, repeat the centrifugation step. A similar protocol can be used for cerebrospinal fluid.
Cell culture supernatantCollect the cell culture media by pipette, followed by centrifugation at 4°C for 20 mins at 1500 rpm. Collect the clear supernatant and assay immediately.
Cell lysatesSolubilize cells in lysis buffer and allow to sit on ice for 30 minutes. Centrifuge tubes at 14,000 x g for 5 minutes to remove insoluble material. Aliquot the supernatant into a new tube and discard the remaining whole cell extract. Quantify total protein concentration using a total protein assay. Assay immediately or aliquot and store at ≤ -20 °C.
Tissue homogenatesThe preparation of tissue homogenates will vary depending upon tissue type. Rinse tissue with 1X PBS to remove excess blood & homogenize in 20ml of 1X PBS (including protease inhibitors) and store overnight at ≤ -20°C. Two freeze-thaw cycles are required to break the cell membranes. To further disrupt the cell membranes you can sonicate the samples. Centrifuge homogenates for 5 mins at 5000xg. Remove the supernatant and assay immediately or aliquot and store at -20°C or -80°C.
Tissue lysatesRinse tissue with PBS, cut into 1-2 mm pieces, and homogenize with a tissue homogenizer in PBS. Add an equal volume of RIPA buffer containing protease inhibitors and lyse tissues at room temperature for 30 minutes with gentle agitation. Centrifuge to remove debris. Quantify total protein concentration using a total protein assay. Assay immediately or aliquot and store at ≤ -20 °C.
Breast MilkCollect milk samples and centrifuge at 10,000 x g for 60 min at 4°C. Aliquot the supernatant and assay. For long term use, store samples at -80°C. Minimize freeze/thaw cycles.
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