CAMK2A/CAMK2D Antibody

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BT1798102
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Description

CAMK2A Antibody Overview

CAMK2A (Calcium/Calmodulin-Dependent Protein Kinase II Alpha) is a key regulator of long-term potentiation (LTP) and memory formation. While the provided search results focus on CAMK2D, CAMK2A’s importance is highlighted in neurodevelopmental studies:

  • Functional Role: CAMK2A knockout mice exhibit impaired hippocampal LTP and spatial learning deficits .

  • Pathogenic Variants: Large chromosomal deletions encompassing CAMK2A are linked to intellectual disability (ID) .

  • Antibody Applications: Though not explicitly detailed in the provided sources, CAMK2A antibodies are widely used in neuroscience research for Western blot (WB), immunohistochemistry (IHC), and immunofluorescence (IF) to study synaptic mechanisms.

CAMK2D Antibody: Key Research Tool

CAMK2D (Calcium/Calmodulin-Dependent Protein Kinase II Delta) is expressed in cardiac and skeletal muscle, with emerging roles in neurodevelopment . The anti-CAMK2D antibody ab181052 (Abcam) is a well-validated reagent:

Validation Data for ab181052

ParameterDetails
Host SpeciesRabbit (Recombinant Monoclonal)
ApplicationsWB, IHC-P, IF
ReactivitiesHuman, Mouse, Rat
Observed Band Size50 kDa (vs. predicted 56 kDa)
Knockout ValidationLoss of signal in CAMK2D knockout HEK-293T and HAP1 cell lines
Key Citations30+ publications, including studies on cardiac hypertrophy

Key Research Findings Using CAMK2D Antibodies

  • Cardiac Anomalies: CAMK2D is implicated in cardiac hypertrophy and arrhythmias, with overexpression linked to pathological calcium signaling .

  • Neurodevelopmental Role: Heterozygous CAMK2D variants were identified in individuals with developmental delays, expanding its known functions beyond cardiac tissue .

  • Subcellular Localization: CAMK2D is membrane-associated, influencing calcium-dependent signaling pathways .

Comparative Analysis of CAMK2A and CAMK2D

FeatureCAMK2ACAMK2D
Primary TissueBrain (neurons)Heart, skeletal muscle
Key FunctionsSynaptic plasticity, memory consolidationCardiac contractility, neurodevelopment
Associated DisordersIntellectual disability, epilepsyCardiomyopathy, neurodevelopmental delays
Antibody AvailabilityWell-established (not detailed in sources)Validated in WB, IHC (e.g., ab181052)

Critical Applications of CAMK2D Antibodies

  • Western Blot: Detects CAMK2D at ~50 kDa in human, mouse, and rat tissues (e.g., cardiac muscle lysates) .

  • Immunohistochemistry: Labels CAMK2D in formalin-fixed paraffin-embedded (FFPE) tissues, such as thyroid carcinoma and cardiac muscle .

  • Functional Studies: Used to confirm CAMK2D knockout in cell lines (e.g., HAP1, HEK-293T) .

Research Implications and Gaps

  • CAMK2A: Further studies are needed to characterize CAMK2A-specific antibodies in disease models, given its strong association with neurodevelopmental disorders .

  • CAMK2D: The antibody ab181052 has enabled discoveries in cardiac and neuronal pathologies, though its cross-reactivity with other isoforms requires careful interpretation .

Product Specs

Buffer
The antibody is supplied in a liquid solution containing 50% glycerol, 0.5% bovine serum albumin (BSA), and 0.02% sodium azide as a preservative.
Form
Liquid
Lead Time
Our standard lead time for dispatching orders is 1-3 business days following order receipt. Delivery time may vary depending on your location and preferred shipping method. For specific delivery timelines, please contact your local distributor.
Target Names
CAMK2A/CAMK2D
Uniprot No.
Q9UQM7 Q13557

Q&A

How to Select CAMK2A/CAMK2D Antibodies for Neurological Research

Question: What experimental factors should guide the selection of CAMK2A or CAMK2D antibodies in neurodevelopmental studies?

Answer:

Antibody selection for CAMK2 isoforms requires rigorous evaluation of isoform specificity, application compatibility, and cross-reactivity potential. Below is a structured approach:

FactorCAMK2ACAMK2D
Isoform SpecificityPrioritize antibodies targeting unique regions (e.g., N-terminal domains)Use antibodies validated against delta-specific epitopes (e.g., C-terminal)
Cross-ReactivityConfirm absence of binding to CAMK2B/C/G via peptide competition assays Test for cross-reactivity with alpha/beta isoforms using knockout models
ApplicationsIdeal for Western blot (WB) and immunofluorescence (IF) in neuronal culturesSuitable for WB, IHC-P, and IP in tissue samples
Validation MethodsUse CAMK2A knockout cell lines (e.g., HEK-293T) to confirm specificity Validate via peptide blocking or knockout lysates

Example Protocol: For studying CAMK2A in neuronal differentiation, choose an antibody with:

  • Documented use in human/mouse neuronal cultures.

  • Absence of CAMK2B/C/G cross-reactivity confirmed via immunogen homology analysis (BLAST).

  • Supporting data from neuronal lysate WB (e.g., observed band ~59–64 kDa) .

Troubleshooting Cross-Reactivity Between CAMK2 Isoforms

Question: How to resolve ambiguous immunoblot signals when using CAMK2A/D antibodies in heteromeric kinase studies?

Answer:

CAMK2 isoforms share high sequence homology (~60–90%), leading to potential cross-reactivity. Below are advanced troubleshooting strategies:

StepMethodExpected Outcome
1. Peptide CompetitionIncubate antibody with immunizing peptide (e.g., CAMK2D C-terminal) Reduced signal intensity if epitope-specific binding occurs
2. Knockout ValidationCompare wild-type vs. CAMK2A/CAMK2D knockout cell lysates Loss of signal in knockout confirms isoform-specific binding
3. Isoform-Specific MarkersCo-stain with isoform-specific secondary antibodies (e.g., CAMK2B) Discern heteromeric complex composition via multiplexed imaging

Case Study: A study of CAMK2A in synaptic plasticity reported conflicting results between WB and IF. Resolution involved:

  • WB: Testing lysates from CAMK2A knockout neurons to confirm antibody specificity .

  • IF: Using structurally distinct CAMK2D antibodies (e.g., N-terminal vs. C-terminal epitopes) .

Optimizing Antibody Dilution for Quantitative WB

Question: How to standardize CAMK2A/CAMK2D antibody dilutions for reproducible quantification in neurodegeneration models?

Answer:

Dilution optimization requires systematic titration and normalization:

ParameterRecommendationRationale
Starting Dilution1:500–1:1000 for WB; 1:200–1:500 for IF Balances signal-to-noise ratio and epitope accessibility
Titration ProtocolTest 5 dilutions (e.g., 1:200, 1:400, 1:800, 1:1600, 1:3200)Identifies linear detection range for densitometry
NormalizationUse β-actin or GAPDH as loading controls; include CAMK2 isoform KO lysatesCompensates for sample variability; confirms isoform specificity

Quantitative Example: For measuring CAMK2D phosphorylation in ischemia-reperfusion injury models :

  • Dilution Curve: Plot band intensity vs. dilution to determine optimal linear range.

  • Phospho-Specific Validation: Confirm antibody does not cross-react with non-phosphorylated CAMK2D using dephosphorylated lysates.

Interpreting Conflicting Data from CAMK2 Antibodies in Neurological Disorders

Question: How to reconcile discrepancies between CAMK2A/D antibody results in animal models vs. human patient samples?

Answer:

Discrepancies often stem from isoform expression divergence or antibody epitope accessibility differences. Below is a framework for analysis:

VariableAnimal ModelsHuman SamplesResolution Strategy
Isoform DominanceCAMK2A predominant in rodent neurons CAMK2D expressed in human cortical neuronsUse isoform-specific antibodies
Epitope MaskingFixed in formalin for IHC-PFresh-frozen tissue for WBOptimize antigen retrieval methods
Post-Translational ModificationsPhosphorylation patterns differ between speciesHuman-specific phosphorylation sitesValidate with phospho-specific antibodies

Case Analysis: A study reported CAMK2A upregulation in Alzheimer’s mouse models but not in human brains. Resolution involved:

  • Species-Specific Validation: Testing antibodies on human-specific CAMK2A splice variants.

  • Sample Preparation: Comparing detergent solubility of human vs. mouse CAMK2A in lysates .

Designing CAMK2 Holoenzyme Assembly Studies with Antibodies

Question: How to use CAMK2A/CAMK2D antibodies to study holoenzyme assembly dynamics in synaptic plasticity?

Answer:

CAMK2 holoenzymes form tetrameric structures; antibody-based approaches can analyze subunit composition:

Experimental ApproachMethodologyAntibody ApplicationExpected Outcome
Co-IP ExperimentsImmunoprecipitate CAMK2A; detect co-purified CAMK2DUse CAMK2A antibody for IP; CAMK2D antibody for WBIdentify heteromeric complexes
Proximity Ligation AssaysDetect physical proximity of CAMK2A/D subunitsUse CAMK2A and CAMK2D antibodies conjugated to PLA probesQuantify subunit interactions in situ
Live-Cell ImagingTrack CAMK2A/D localization during LTP inductionFluorescently labeled CAMK2A/D antibodiesMonitor holoenzyme reorganization

Advanced Protocol: For studying CAMK2A/CAMK2D interactions in neuronal activity-dependent clustering:

  • Stimulate Neurons: Induce LTP via glutamate or NMDA receptor activation.

  • Fixation and Staining: Use permeabilization-free protocols to preserve membrane-bound complexes.

  • Image Analysis: Quantify co-localization using Pearson’s correlation coefficients.

Validating Antibody Specificity in CAMK2 Knockout Models

Question: What methods ensure CAMK2A/CAMK2D antibody specificity in gene-edited cellular models?

Answer:

Knockout (KO) validation is critical for eliminating false positives:

Validation StepProcedureInterpretationSource
KO Lysate ComparisonCompare WT vs. CAMK2A/CAMK2D KO lysates via WBAbsence of band in KO confirms specificity
Peptide CompetitionPre-incubate antibody with immunizing peptide>50% signal reduction indicates epitope specificity
Isoform-Specific WBResolve isoforms via SDS-PAGE (CAMK2A: ~59 kDa, CAMK2D: ~64 kDa)Band size consistency across replicates confirms target identity

Example Workflow: For validating a CAMK2D antibody in cardiac research :

  • KO Cell Line: Use CAMK2D knockout HEK-293T lysates (ab267322) .

  • Multiplexing: Co-stain with anti-GAPDH to confirm equal loading.

  • Quantification: Normalize CAMK2D signal to GAPDH in WT vs. KO.

Analyzing CAMK2 Isoform Expression in Heterogeneous Tissue Samples

Question: How to account for tissue-specific CAMK2A/CAMK2D expression variability in multi-organ studies?

Answer:

Tissue heterogeneity requires isoform-specific quantification strategies:

Tissue TypeCAMK2A DominanceCAMK2D DominanceAntibody Recommendations
BrainSynaptic terminals Neuronal nuclei Use CAMK2A for synaptic studies; CAMK2D for nuclear signaling
HeartMyocyte junctions Myocyte cytoplasm Validate cardiac CAMK2D antibodies via IHC-P
Skeletal MuscleMinimal expression High expression Use CAMK2D antibodies with muscle-specific validation

Advanced Protocol: For profiling CAMK2A/D in neurodevelopmental disorders:

  • Laser Microdissection: Isolate cell populations (e.g., neurons vs. astrocytes).

  • Single-Cell qPCR: Correlate mRNA with protein levels using isoform-specific antibodies.

Resolving Antibody Cross-Reactivity in CAMK2 Phosphorylation Studies

Question: How to distinguish phosphorylated CAMK2A from CAMK2D in kinase activity assays?

Answer:

Phosphorylation-specific antibodies require stringent validation:

StrategyMethodOutcomeExample
Phospho-Epitope BlockingPre-treat lysates with non-phosphorylated peptideEliminates non-specific binding to phosphorylated residuesCAMK2D Thr287 phosphorylation
2D Gel ElectrophoresisSeparate isoforms by pI and MWResolves phosphorylated CAMK2A from CAMK2DHuman neuronal lysate analysis
MutagenesisUse CAMK2A/D mutants lacking phosphorylation sitesConfirm antibody specificity for phospho formsKinase-dead CAMK2D mutants

Case Study: A study detected overlapping CAMK2A/D phosphorylation signals. Resolution involved:

  • Isoform Separation: 2D gel electrophoresis to resolve CAMK2A (pI ~5.2) from CAMK2D (pI ~5.8) .

  • Phosphatase Treatment: Use λ-phosphatase to dephosphorylate lysates and confirm antibody specificity .

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