Rat GSK3 alpha/GSK3a ELISA Kit- High Sensitivity

Product Name:	Rat Gsk3a (Glycogen synthase kinase-3 alpha) ELISA Kit
Product Code:	RTFI00111
Size:	96 Assays
Target:	Rat Gsk3a
Alias:	Gsk3a, Glycogen synthase kinase-3 alpha
Reactivity:	Rat
Detection Method:	Sandwich ELISA, Double Antibody
Sensitivity:	0.375ng/ml
Range:	0.625-40ng/ml
Storage:	4°C for 6 months
Note:	For Research Use Only

Recovery:

Matrices listed below were spiked with certain level of Rat Gsk3a and the recovery rates were calculated by comparing the measured value to the expected amount of Rat Gsk3a in samples.

Matrix	Recovery range(%)	Average(%)
serum(n=5)	86-105	94
EDTA plasma(n=5)	92-101	97
UFH plasma(n=5)	87-105	95

Linearity:

The linearity of the kit was assayed by testing samples spiked with appropriate concentration of Rat Gsk3a and their serial dilutions. The results were demonstrated by the percentage of calculated concentration to the expected.

Sample	1:2	1:4	1:8
serum(n=5)	86-103%	88-105%	89-104%
EDTA plasma(n=5)	83-99%	83-95%	93-100%
UFH plasma(n=5)	81-97%	86-100%	84-99%

Intra-Assay:

CV <8%

Inter-Assay:

CV <10%

Uniprot:

P18265

UniProt Protein Function:	GSK3A: a proline-directed protein kinase of the GSK family. Implicated in the control of several regulatory proteins including glycogen synthase, Myb, and c-Jun. GSK3 and GSK3 have similar functions. GSK3 phophorylates tau, the principal component of neurofibrillary tangles in Alzheimer disease and is required for maximal production of amyloid plaque peptides by secretase. A GSK3 promoter SNP effects progression of bipolar disorder. The GSK3 inhibitor, lithium, is used to treat bipolar disorder and is seen to block plaque formation. GSK3 generally opposes the action of insulin, and GSK3 hyperactivity is thought to contribute to insulin resistant (type II) diabetes. GSK3 also negatively regulates cardiac hypertrophy. A tumor suppressor role is indicated by the oncogenic potential of stabilized -catenin mutants that lack GSK3 phosphorylation sites. Inhibitor: AR-A014418
UniProt Protein Details:	Protein type:EC 2.7.11.1; EC 2.7.11.26; Protein kinase, CMGC; Kinase, protein; Protein kinase, Ser/Thr (non-receptor); CMGC group; GSK family; GSK subfamily Chromosomal Location of Human Ortholog: 19q13.2 Cellular Component: beta-catenin destruction complex; cytosol Molecular Function:protein serine/threonine kinase activity; protein binding; tau-protein kinase activity; ATP binding Biological Process: glycogen metabolic process; proteasomal ubiquitin-dependent protein catabolic process; genetic imprinting; nerve growth factor receptor signaling pathway; negative regulation of insulin receptor signaling pathway; protein amino acid phosphorylation; negative regulation of transferase activity; positive regulation of cAMP biosynthetic process; negative regulation of glycogen biosynthetic process; epidermal growth factor receptor signaling pathway; nervous system development; negative regulation of TOR signaling pathway; cell migration; phosphoinositide-mediated signaling; Wnt receptor signaling pathway; fibroblast growth factor receptor signaling pathway; unfolded protein response; positive regulation of peptidyl-serine phosphorylation; negative regulation of glucose import; cellular protein metabolic process; unfolded protein response, activation of signaling protein activity; cellular response to insulin stimulus; regulation of systemic arterial blood pressure; insulin receptor signaling pathway; positive regulation of protein catabolic process; innate immune response; positive regulation of transcription from RNA polymerase II promoter; positive regulation of heart contraction
NCBI Summary:	This gene encodes a multifunctional Ser/Thr protein kinase that is implicated in the control of several regulatory proteins including glycogen synthase, and transcription factors, such as JUN. It also plays a role in the WNT and PI3K signaling pathways, as well as regulates the production of beta-amyloid peptides associated with Alzheimer's disease. [provided by RefSeq, Oct 2011]
UniProt Code:	P18265
NCBI GenInfo Identifier:	49574532
NCBI Gene ID:	2931
NCBI Accession:	NP_063937.2
UniProt Secondary Accession:	P18265,P49841, Q2NL51, Q9WV60, P18265 P18266,
UniProt Related Accession:	P49840
Molecular Weight:	51kDa
NCBI Full Name:	glycogen synthase kinase-3 alpha
NCBI Synonym Full Names:	glycogen synthase kinase 3 alpha
NCBI Official Symbol:	GSK3A
NCBI Protein Information:	glycogen synthase kinase-3 alpha
UniProt Protein Name:	Glycogen synthase kinase-3 alpha
UniProt Synonym Protein Names:	Serine/threonine-protein kinase GSK3A
Protein Family:	Glycogen synthase kinase
UniProt Gene Name:	GSK3A
UniProt Entry Name:	GSK3A_HUMAN

Step	Procedure
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 Type	Protocol
Serum:	If 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 clotovernight at 2-8°C. Centrifuge for 10 minutes at 1,000x g. Removeserum and assay promptly or aliquot and store the samples at-80°C. Avoid multiple freeze-thaw cycles.
Plasma:	Collect plasma using EDTA or heparin as an anti-coagulant. Centrifuge samples at 4°C for 15 mins at 1000 Ã— 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 Fluid:	Collect 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 Supernatant:	Collect 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 Lysates:	Solubilize 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 Homogenates:	The preparation of tissue homogenates will vary depending upon tissue type. Rinse tissue with 1X PBS to remove excess blood & homogenizein 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 Lysates:	Rinse 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 Milk:	Collect 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.