Mouse STUB1(E3 ubiquitin-protein ligase CHIP)ELISA Kit  (MOES01788)

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ELISA Kit Technical ManualMSDS

Mouse STUB1(E3 ubiquitin-protein ligase CHIP)ELISA Kit 

This ELISA kit uses Sandwich-ELISA as the method. The micro ELISA plate provided in this kit has been pre-coated with an antibody specific to Mouse STUB1 . Standards or samples are added to the appropriate micro ELISA plate wells and combined with the specific antibody. Then a biotinylated detection antibody specific for Mouse STUB1 and Avidin-Horseradish Peroxidase (HRP) conjugate are added to each micro plate well successively and incubated. Free components are washed away. The substrate solution is added to each well. Only those wells that contain Mouse STUB1, biotinylated detection antibody and Avidin-HRP conjugate will appear blue in color. The enzyme-substrate reaction is terminated by adding Stop Solution and the color turns yellow. The optical density (OD) is measured spectrophotometrically at a wavelength of 450 nm ± 2 nm. The OD value is proportional to the concentration of Mouse STUB1. The concentration of Mouse STUB1 in samples can be calculated by comparing the OD of the samples to the standard curve.

Assay typeSandwich
Assay time4.5h
Detection MethodColormetric
Detection Range0.16-10 ng/mL
Sensitivity0.10 ng/mL
Sample Volume Required Per Well100uL
Sample TypeSerum, plasma and other biological fluids


This kit recognizes Mouse STUB1 in samples. No significant cross-reactivity or interference between Mouse STUB1 and analogues was observed.

Typical Data

As the OD values of the standard curve may vary according to the conditions of the actual assay performance (e.g. operator, pipetting technique, washing technique or temperature effects), the operator should establish a standard curve for each test. Typical standard curve and data is provided below for reference only.

O.D Average Corrected


Intra-assay Precision (Precision within an assay): 3 samples with low, mid range and high level Mouse STUB1 were tested 20 times on one plate, respectively.

Inter-assay Precision (Precision between assays): 3 samples with low, mid range and high level Mouse STUB1 were tested on 3 different plates, 20 replicates in each plate.

Intra-assay Precision Inter-assay Precision
Mean (ng/mL)0.540.923.660.491.013.71
Standard deviation0.
C V (%)5.565.433.016.123.963.23


The recovery of Mouse STUB1 spiked at three different levels in samples throughout the range of the assay was evaluated in various matrices.

Sample Type Range (%) Average Recovery (%)
Serum (n=5)95-111101
EDTA plasma (n=5)89-9994
Cell culture media (n=5)95-107101


Samples were spiked with high concentrations of Mouse STUB1 and diluted with Reference Standard & Sample Diluent to produce samples with values within the range of the assay.

Serum (n=5) EDTA plasma (n=5) Cell culture media (n=5)
1:2Range (%)87-10095-10985-99
Average (%)9410191
1:4Range (%)91-10987-10083-96
Average (%)999288
1:8Range (%)92-10580-9486-100
Average (%)988793
1:16Range (%)90-10581-9484-98
Average (%)978690

Kit Components & Storage

An unopened kit can be stored at 4'C for 1 month. If the kit is not used within 1 month, store the items separately according to the following conditions once the kit is received.

Item Specifications Storage
Micro ELISA Plate(Dismountable)8 wells X12 strips-20'C, 6 months
Reference Standard2 vials
Concentrated Biotinylated Detection Ab (100X)1 vial, 120 uL
Concentrated HRP Conjugate (100X)1 vial, 120 uL-20'C(shading light), 6 months
Reference Standard & Sample Diluent1 vial, 20 mL4'C, 6 months
Biotinylated Detection Ab Diluent1 vial, 14 mL
HRP Conjugate Diluent1 vial, 14 mL
Concentrated Wash Buffer (25X)1 vial, 30 mL
Substrate Reagent1 vial, 10 mL4'C(shading light)
Stop Solution1 vial, 10 mL4'C
Plate Sealer5 pieces
Product Description1 copy
Certificate of Analysis1 copy

Mouse STUB1(E3 ubiquitin-protein ligase CHIP)ELISA Kit  (MOES01788) Assay procedure

    1. Set standard, test sample and control (zero) wells on the pre-coated plate and record theirpositions. It is recommended to measure each standard and sample in duplicate. Note: addall solutions to the bottom of the plate wells while avoiding contact with the well walls. Ensuresolutions do not foam when adding to the wells.
    2. Aliquot 100µl of standard solutions into the standard wells.
    3. Add 100µl of Sample / Standard dilution buffer into the control (zero) well.
    4. Add 100µl of properly diluted sample (serum, plasma, tissue homogenates and otherbiological fluids) into test sample wells.
    5. Cover the plate with the sealer provided in the kit and incubate for 90 min at 37°C.
    6. Aspirate the liquid from each well, do not wash. Immediately add 100µL of BiotinylatedDetection Ab working solution to each well. Cover the plate with a plate seal and gently mix.Incubate for 1 hour at 37°C.
    7. Aspirate or decant the solution from the plate and add 350µL of wash buffer to each welland incubate for 1-2 minutes at room temperature. Aspirate the solution from each well andclap the plate on absorbent filter paper to dry. Repeat this process 3 times. Note: a microplatewasher can be used in this step and other wash steps.
    8. Add 100µL of HRP Conjugate working solution to each well. Cover with a plate seal andincubate for 30 min at 37°C.
    9. Aspirate or decant the solution from each well. Repeat the wash process for five times asconducted in step 7.
    10. Add 90µL of Substrate Reagent to each well. Cover with a new plate seal and incubate forapproximately 15 min at 37°C. Protect the plate from light. Note: the reaction time can beshortened or extended according to the actual color change, but not by more than 30min.
    11. Add 50 µL of Stop Solution to each well. Note: Adding the stop solution should be done inthe same order as the substrate solution.
    12. Determine the optical density (OD value) of each well immediately with a microplate readerset at 450 nm.

Mouse STUB1(E3 ubiquitin-protein ligase CHIP)ELISA Kit  (MOES01788) Protein Information

UniProt Protein Function:CHIP: E3 ubiquitin-protein ligase which targets misfolded chaperone substrates towards proteasomal degradation. Collaborates with ATXN3 in the degradation of misfolded chaperone substrates: ATXN3 restricting the length of ubiquitin chain attached to STUB1/CHIP substrates and preventing further chain extension. Ubiquitinates NOS1 in concert with Hsp70 and Hsp40. Modulates the activity of several chaperone complexes, including Hsp70, Hsc70 and Hsp90. Mediates transfer of non-canonical short ubiquitin chains to HSPA8 that have no effect on HSPA8 degradation. Mediates polyubiquitination of DNA polymerase beta (POLB) at 'Lys-41', 'Lys-61' and 'Lys-81', thereby playing a role in base-excision repair: catalyzes polyubiquitination by amplifying the HUWE1/ARF- BP1-dependent monoubiquitination and leading to POLB-degradation by the proteasome. Mediates polyubiquitination of CYP3A4. Ubiquitinates EPHA2 and may regulate the receptor stability and activity through proteasomal degradation. Homodimer. Interacts with BAG2, and with the E2 ubiquitin conjugating enzymes UBE2D1, UBE2D2 and UBE2D3. Interacts with the C-terminal domains of HSPA8 and HSPA1A. Detected in a ternary complex containing STUB1, HSPA1A and HSPBP1. Interacts with MKKS. Interacts with DYX1C1 and POLB. Interacts (via TPR repeats) with HSP90AA1. Interacts (when monoubiquitinated) with ATXN3. Interacts with UBE2W. Interacts (via the U-box domain) with the UBE2V2- UBE2N heterodimer; the complex has a specific 'Lys-63'-linked polyubiquitination activity. Interacts with DNAJB6. Highly expressed in skeletal muscle, heart, pancreas, brain and placenta. Detected in kidney, liver and lung. 2 isoforms of the human protein are produced by alternative splicing.
UniProt Protein Details:

Protein type:EC; Ubiquitin conjugating system; EC 6.3.2.-; Ligase; Adaptor/scaffold; Ubiquitin ligase

Cellular Component: nucleoplasm; intermediate filament cytoskeleton; endoplasmic reticulum; ubiquitin conjugating enzyme complex; cytoplasm; plasma membrane; ubiquitin ligase complex; nuclear inclusion body

Molecular Function:protein binding, bridging; protein homodimerization activity; coenzyme F420-2 alpha-glutamyl ligase activity; ribosomal S6-glutamic acid ligase activity; ubiquitin-protein ligase activity; misfolded protein binding; Hsp70 protein binding; Hsp90 protein binding; protein binding; enzyme binding; G-protein-coupled receptor binding; TPR domain binding; heat shock protein binding; ubiquitin protein ligase binding; UDP-N-acetylmuramoylalanyl-D-glutamyl-2,6-diaminopimelate-D-alanyl-D-alanine ligase activity; coenzyme F420-0 gamma-glutamyl ligase activity; SMAD binding; kinase binding; ligase activity

Biological Process: ubiquitin-dependent protein catabolic process; proteasomal ubiquitin-dependent protein catabolic process; protein autoubiquitination; protein polyubiquitination; protein folding; unfolded protein response; protein maturation; misfolded or incompletely synthesized protein catabolic process; protein ubiquitination; ubiquitin-dependent SMAD protein catabolic process; DNA repair; positive regulation of protein ubiquitination; positive regulation of ubiquitin-protein ligase activity; positive regulation of proteasomal ubiquitin-dependent protein catabolic process; regulation of glucocorticoid metabolic process; negative regulation of protein binding; response to DNA damage stimulus

UniProt Code:Q9WUD1
NCBI GenInfo Identifier:9789907
NCBI Gene ID:56424
NCBI Accession:NP_062693.1
UniProt Secondary Accession:Q9WUD1,Q9DCJ0,
UniProt Related Accession:Q9WUD1
Molecular Weight:34,909 Da
NCBI Full Name:STIP1 homology and U box-containing protein 1
NCBI Synonym Full Names:STIP1 homology and U-Box containing protein 1
NCBI Official Symbol:Stub1  
NCBI Official Synonym Symbols:Chip; AW046544; 0610033N24Rik; 2210017D18Rik; 2310040B03Rik  
NCBI Protein Information:STIP1 homology and U box-containing protein 1
UniProt Protein Name:STIP1 homology and U box-containing protein 1
UniProt Synonym Protein Names:Carboxy terminus of Hsp70-interacting protein
Protein Family:STIP1 homology and U box-containing protein
UniProt Gene Name:Stub1  
UniProt Entry Name:CHIP_MOUSE
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