Human CACNA1A ELISA Kit (HUFI01231)

Product Name:	Human CACNA1A ELISA Kit
Product Code:	HUFI01231
Size:	96 Assays
Alias:	CACNA1A, Voltage-dependent P, Q-type calcium channel subunit alpha-1A, Voltage-gated calcium channel subunit alpha Cav2.1, Brain calcium channel I, BI, Calcium channel, L type, alpha-1 polypeptide isoform 4
Detection method:	Sandwich ELISA, Double Antibody
Application:	This immunoassay kit allows for the in vitro quantitative determination of Human CACNA1A concentrations in serum plasma and other biological fluids.
Sensitivity:	0.094ng/ml
Range:	0.156-10ng/ml
Storage:	4°C for 6 months
Note:	For Research Use Only

Recovery:

Matrices listed below were spiked with certain level of Human CACNA1A and the recovery rates were calculated by comparing the measured value to the expected amount of Human CACNA1A in samples.

Matrix	Recovery range(%)	Average(%)
serum(n=5)	86-105	93
EDTA plasma(n=5)	88-99	93
UFH plasma(n=5)	85-104	95

Linearity:

The linearity of the kit was assayed by testing samples spiked with appropriate concentration of Human CACNA1A 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)	85-95%	85-101%	93-100%
EDTA plasma(n=5)	83-94%	84-96%	87-101%
UFH plasma(n=5)	93-99%	89-99%	87-99%

CV(%):

Intra-Assay: CV<8%
Inter-Assay: CV<10%

Component	Quantity	Storage
ELISA Microplate (Dismountable)	8×12 strips	4°C for 6 months
Lyophilized Standard	2	4°C/-20°C
Sample/Standard Dilution Buffer	20ml	4°C
Biotin-labeled Antibody(Concentrated)	120ul	4°C (Protect from light)
Antibody Dilution Buffer	10ml	4°C
HRP-Streptavidin Conjugate(SABC)	120ul	4°C (Protect from light)
SABC Dilution Buffer	10ml	4°C
TMB Substrate	10ml	4°C (Protect from light)
Stop Solution	10ml	4°C
Wash Buffer(25X)	30ml	4°C
Plate Sealer	5	-

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

Uniprot

O00555

UniProt Protein Function:	CACNA1A: Voltage-sensitive calcium channels (VSCC) mediate the entry of calcium ions into excitable cells and are also involved in a variety of calcium-dependent processes, including muscle contraction, hormone or neurotransmitter release, gene expression, cell motility, cell division and cell death. The isoform alpha-1A gives rise to P and/or Q-type calcium currents. P/Q-type calcium channels belong to the 'high-voltage activated' (HVA) group and are blocked by the funnel toxin (Ftx) and by the omega-agatoxin- IVA (omega-Aga-IVA). They are however insensitive to dihydropyridines (DHP), and omega-conotoxin-GVIA (omega-CTx-GVIA). Defects in CACNA1A are the cause of spinocerebellar ataxia type 6 (SCA6). Spinocerebellar ataxia is a clinically and genetically heterogeneous group of cerebellar disorders. Patients show progressive incoordination of gait and often poor coordination of hands, speech and eye movements, due to degeneration of the cerebellum with variable involvement of the brainstem and spinal cord. SCA6 is mainly caused by expansion of a CAG repeat in the coding region of CACNA1A. There seems to be a correlation between the repeat number and earlier onset of the disorder. Defects in CACNA1A are the cause of familial hemiplegic migraine type 1 (FHM1); also known as migraine familial hemiplegic 1 (MHP1). FHM1, a rare autosomal dominant subtype of migraine with aura, is associated with ictal hemiparesis and, in some families, progressive cerebellar atrophy. Defects in CACNA1A are the cause of episodic ataxia type 2 (EA2); also known as acetazolamide-responsive hereditary paroxysmal cerebellar ataxia (APCA). EA2 is an autosomal dominant disorder characterized by acetozolamide- responsive attacks of ataxia, migraine-like symptoms, interictal nystagmus, and cerebellar atrophy. Belongs to the calcium channel alpha-1 subunit (TC 1.A.1.11) family. CACNA1A subfamily. 7 isoforms of the human protein are produced by alternative splicing.
UniProt Protein Details:	Protein type:Membrane protein, multi-pass; Channel, calcium; Membrane protein, integral Chromosomal Location of Human Ortholog: 19p13 Cellular Component: cell projection; cell soma; dendrite; cytoplasm; plasma membrane; integral to membrane; voltage-gated calcium channel complex; nucleus Molecular Function:voltage-gated calcium channel activity; protein binding; syntaxin binding; metal ion binding; high voltage-gated calcium channel activity Biological Process: cell death; vestibular nucleus development; musculoskeletal movement, spinal reflex action; gamma-aminobutyric acid secretion; regulation of axonogenesis; adult walking behavior; receptor clustering; cellular chloride ion homeostasis; synaptic transmission; behavioral response to pain; elevation of cytosolic calcium ion concentration; synaptogenesis; neurotransmitter metabolic process; negative regulation of neuron apoptosis; neuromuscular process controlling balance; cell growth; cerebellum maturation; synaptic transmission, glutamatergic; rhythmic synaptic transmission; regulation of acetylcholine secretion; dendrite morphogenesis; calcium ion-dependent exocytosis of neurotransmitter; glucose metabolic process; transmission of nerve impulse; spinal cord motor neuron differentiation; regulation of calcium ion-dependent exocytosis; cerebellar molecular layer development; calcium ion-dependent exocytosis; membrane depolarization; sulfur amino acid metabolic process; cerebellar Purkinje cell differentiation; energy reserve metabolic process; neuromuscular synaptic transmission; hormone metabolic process; regulation of insulin secretion; negative regulation of hormone biosynthetic process; gamma-aminobutyric acid signaling pathway Disease: Spinocerebellar Ataxia 6; Migraine, Familial Hemiplegic, 1; Episodic Ataxia, Type 2
UniProt Code:	O00555
NCBI GenInfo Identifier:	6166047
NCBI Gene ID:
NCBI Accession:	O00555.2
Molecular Weight:
NCBI Full Name:	Voltage-dependent P/Q-type calcium channel subunit alpha-1A
UniProt Protein Name:	Voltage-dependent P/Q-type calcium channel subunit alpha-1A
UniProt Synonym Protein Names:	Brain calcium channel I; BI; Calcium channel, L type, alpha-1 polypeptide isoform 4; Voltage-gated calcium channel subunit alpha Cav2.1
UniProt Gene Name:	CACNA1A
UniProt Entry Name:	CAC1A_HUMAN

*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.

Step	Protocol
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 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.
Plasma	Collect 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 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 & 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 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.

Human CACNA1A ELISA Kit (HUFI01231)

Description