PLCG1 (Ab-771) Antibody

What is PLCG1 and what cellular functions does it serve?

PLCG1 (Phospholipase C gamma 1) is a critical signaling enzyme that mediates the production of two important second messenger molecules: diacylglycerol (DAG) and inositol 1,4,5-trisphosphate (IP3) . These second messengers play crucial roles in intracellular signaling cascades by regulating calcium mobilization and protein kinase C activation.

PLCG1 becomes activated primarily in response to ligand-mediated activation of receptor-type tyrosine kinases, including PDGFRA, PDGFRB, FGFR1, FGFR2, FGFR3, FGFR4, and EGFR . Upon activation, PLCG1 catalyzes the hydrolysis of phosphatidylinositol 4,5-bisphosphate (PIP2) to generate DAG and IP3.

Functionally, PLCG1 plays important roles in:

• Regulation of intracellular calcium mobilization

• Actin reorganization and cell migration

• T-cell receptor signaling and IL-2 gene expression

• Guanine nucleotide exchange for DNM1 in endocytosis

What applications is PLCG1 (Ab-771) Antibody suitable for?

PLCG1 (Ab-771) Antibody has been validated for several research applications:

When using this antibody for Western blotting, researchers should note that the target protein appears at approximately 148-155 kDa . For immunohistochemistry applications, appropriate antigen retrieval methods are recommended for optimal staining results .

What species reactivity does this antibody exhibit?

PLCG1 (Ab-771) Antibody demonstrates consistent reactivity across three main species:

• Human

• Mouse

• Rat

This cross-reactivity is due to the high conservation of the target epitope (the region containing and surrounding Y771) across these species. The sequence P-D-Y-G-A is preserved in human, mouse, and rat PLCG1 proteins .

This multi-species reactivity allows researchers to use the same antibody across different experimental models, facilitating comparative studies between human samples and rodent models. The antibody has been experimentally validated in these species through Western blot, IHC, and other applications .

What is the difference between phosphorylated and non-phosphorylated PLCG1 (Ab-771) antibodies?

The key distinction between these antibodies lies in their specificity for the phosphorylation state of the tyrosine 771 (Y771) residue in PLCG1:

Using non-phosphorylated antibodies, researchers can quantify total PLCG1 expression, while phospho-specific antibodies detect activated forms resulting from receptor tyrosine kinase signaling . This allows for comprehensive monitoring of both PLCG1 expression and its activation state in response to various stimuli.

How should I properly store and handle PLCG1 (Ab-771) Antibody?

Proper storage and handling of PLCG1 (Ab-771) Antibody is crucial for maintaining its activity and specificity:

Storage recommendations:

• Long-term storage: -20°C or -80°C

• Avoid repeated freeze-thaw cycles by preparing small aliquots

• Some suppliers recommend storage at 4°C for short-term use

Handling guidelines:

• The antibody is typically supplied in liquid form

• Buffer composition: Phosphate buffered saline (without Mg²⁺ and Ca²⁺), pH 7.4, 150mM NaCl, 0.02% sodium azide, and 50% glycerol

• Allow the antibody to equilibrate to room temperature before opening

• When diluting, use appropriate buffers as recommended in protocols

Stability information:

• Typical shelf life: One year from dispatch when stored properly

• Monitor for signs of degradation such as precipitation or loss of activity

Following these guidelines will help ensure consistent antibody performance and extend its useful life in experimental applications.

What controls should I include when working with PLCG1 (Ab-771) Antibody?

When working with PLCG1 (Ab-771) Antibody, implementing appropriate controls ensures reliable and interpretable results:

Positive controls:

• Cell lines known to express PLCG1 (widely distributed across cell types)

• For phospho-Y771 detection: Cells stimulated with growth factors like EGF or PDGF

• Jurkat T cells express PLCG1 and could serve as a positive control

• 3T3 cells have been used for Western blot validation

Negative controls:

• If available, PLCG1 knockout or knockdown cells (such as the J.gamma1 cell line)

• For phospho-specific antibodies: Unstimulated cells or cells treated with phosphatase

• Primary antibody omission control to check for non-specific binding

Specificity controls:

• Peptide competition assay using the immunizing peptide (P-D-Y-G-A)

• If using phospho-specific antibody, competition with both phosphorylated and non-phosphorylated peptides

• Comparing signals from both phospho-specific and total PLCG1 antibodies

Loading and transfer controls:

• Housekeeping proteins (β-actin, GAPDH) to ensure equal loading

• For phosphorylation studies: Reprobing with total PLCG1 antibody after stripping

These controls collectively ensure that observed signals are specific and biologically relevant.

What is the significance of the Y771 phosphorylation site in PLCG1?

The tyrosine 771 (Y771) residue represents one of several important phosphorylation sites in PLCG1 that regulate its activity and function:

Signaling significance:

• Y771 phosphorylation occurs in response to activation of receptor tyrosine kinases (RTKs) like PDGFR, EGFR, and FGFR

• While Y783 is often considered the primary activation site, Y771 phosphorylation contributes to the full activation of PLCG1

• Y771 phosphorylation may influence the conformation of PLCG1, affecting its binding to other signaling proteins

Functional impact:

• Contributes to the catalytic activity of PLCG1 in hydrolyzing PIP2 to generate DAG and IP3

• May regulate protein-protein interactions involving PLCG1

• Phosphorylation at tyrosine sites causes conformational changes that allow PLCG1's SH3 domain to interact with other proteins

Research implications:

• Monitoring Y771 phosphorylation provides insights into RTK signaling activation

• Comparing phosphorylation patterns across multiple sites (Y771, Y783, Y1253) provides a more comprehensive understanding of PLCG1 regulation

• Understanding site-specific phosphorylation helps in developing targeted therapeutic approaches

How can I use PLCG1 (Ab-771) Antibody to study receptor tyrosine kinase signaling pathways?

PLCG1 (Ab-771) Antibody can be a valuable tool for studying receptor tyrosine kinase (RTK) signaling through multiple experimental approaches:

Activation dynamics studies:

• Time-course experiments: Treat cells with RTK ligands (EGF, PDGF, FGF) and monitor Y771 phosphorylation over time

• Dose-response analyses: Determine the concentration-dependent effects of growth factors

• Dual phosphorylation analysis: Compare Y771 phosphorylation with other sites (Y783, Y1253)

Pathway dissection:

• Inhibitor studies: Use specific RTK inhibitors to determine which receptors signal through Y771 phosphorylation

• Combination with other pathway markers: Analyze PLCG1 Y771 phosphorylation alongside ERK, Akt, and other RTK effectors

• siRNA/CRISPR approaches: Knockdown/knockout specific RTKs to determine their contribution to PLCG1 activation

Co-localization and protein interaction studies:

• Immunoprecipitation of PLCG1 followed by RTK detection

• Proximity ligation assays (PLA) to detect close association of PLCG1 with activated RTKs

• Immunofluorescence co-localization of PLCG1 with RTKs at the membrane upon stimulation

Physiological response correlation:

• Link Y771 phosphorylation to calcium mobilization using calcium imaging techniques

• Correlate PLCG1 activation with cell migration, proliferation, or differentiation

• Study actin reorganization in relation to PLCG1 activation

What is the relationship between PLCG1 phosphorylation and its interaction with Akt?

Research has revealed an interesting relationship between PLCG1 phosphorylation and Akt interaction:

PLCG1-Akt interaction mechanism:

• Studies have identified a novel interaction between PLCG1 and Akt

• This interaction is mediated by the binding of PLCG1's SH3 domain to Akt proline-rich motifs

• Phosphorylation of PLCG1 at Y783 appears to cause conformational changes that enable this interaction

• While Y783 is explicitly mentioned in relation to the Akt interaction, Y771 phosphorylation might also contribute to these conformational changes

Functional consequences:

• The PLCG1-Akt interaction results in phosphorylation of PLCG1 at S1248 by Akt

• This interaction enhances EGF-stimulated cell motility

• It represents a critical point of cross-talk between the PLCG1 and PI3K-Akt signaling pathways

Experimental approaches to study this relationship:

• Compare the ability of Y771F and Y783F PLCG1 mutants to interact with Akt

• Use both phospho-Y771 and phospho-Y783 antibodies to determine the phosphorylation sequence

• Employ proximity ligation assays to visualize PLCG1-Akt interactions in relation to Y771 phosphorylation status

This bidirectional relationship between PLCG1 and Akt represents an important regulatory mechanism in RTK signaling .

How can I optimize Western blot conditions when using PLCG1 (Ab-771) Antibody?

For optimal Western blot results with PLCG1 (Ab-771) Antibody, consider these protocol recommendations:

Sample preparation:

• Lyse cells in buffer containing phosphatase inhibitors if detecting phosphorylated forms

• Use freshly prepared samples when possible, or store at -80°C with protease inhibitors

• Denature samples at 95-100°C for 5 minutes in standard Laemmli buffer

Gel electrophoresis and transfer:

• Use 7-8% acrylamide gels for optimal resolution of the 148-155 kDa PLCG1 protein

• Consider longer run times for better separation from other high molecular weight proteins

• Transfer to PVDF or nitrocellulose membranes (0.45 μm pore size recommended for large proteins)

Blocking and antibody incubation:

• Block with 5% BSA in TBS-T for phospho-specific detection; 5% milk in TBS-T for total protein

• Recommended primary antibody dilution: 1:500-1:1000

• Incubate overnight at 4°C for maximum sensitivity

• Use thorough washing steps: 3-5 washes with TBS-T for 5-10 minutes each

Detection systems:

• HRP-conjugated anti-rabbit secondary antibodies work well at 1:2000-1:5000 dilution

• Enhanced chemiluminescence (ECL) reagents are suitable for visualization

• For phospho-specific detection, consider using more sensitive ECL substrates

Expected results:

• PLCG1 should appear as a distinct band at approximately 148-155 kDa

• For phospho-specific antibodies, signal intensity should increase following stimulation with growth factors

How can I validate the specificity of PLCG1 (Ab-771) Antibody?

Validating antibody specificity is crucial for ensuring reliable experimental results. For PLCG1 (Ab-771) Antibody, consider these validation approaches:

Molecular verification:

• Western blot analysis to confirm detection of a protein at the expected molecular weight (148-155 kDa)

• Comparison with other validated PLCG1 antibodies targeting different epitopes

• Peptide competition assay using the immunizing peptide (P-D-Y-G-A)

Genetic approaches:

• Testing in PLCG1 knockout or knockdown models (like the J.gamma1 cell line)

• Overexpression systems: Comparing signal in cells overexpressing PLCG1 versus control cells

• Site-directed mutagenesis of Y771 to phenylalanine (Y771F) to confirm phospho-specificity

Physiological validation:

• Stimulus-response testing: Treatment with growth factors (EGF, PDGF) should increase phospho-Y771 signal

• Inhibitor studies: Pretreatment with RTK inhibitors should reduce phospho-Y771 signal

• Phosphatase treatment: Sample dephosphorylation should eliminate phospho-Y771 signal

Cross-reactivity assessment:

• Testing for signal in species beyond the claimed reactivity

• Evaluating potential cross-reactivity with other PLC family members (like PLCG2)

• Immunoprecipitation followed by mass spectrometry to identify all proteins recognized

Reconstitution experiments in PLC-γ1-deficient cell lines like P98 or J.gamma1 can be particularly valuable for confirming antibody specificity and exploring functional consequences of PLCG1 phosphorylation .

How does PLCG1 (Ab-771) Antibody compare to antibodies targeting other phosphorylation sites?

PLCG1 contains multiple tyrosine phosphorylation sites, with Y771 and Y783 being among the most studied. Comparing antibodies against these sites provides complementary information:

Functional significance comparison:

• Y783 phosphorylation is considered a primary activation marker for PLCG1; directly linked to enzymatic activation by Syk

• Y771 phosphorylation contributes to PLCG1 activation but may have distinct roles in protein-protein interactions

• Y783 phosphorylation appears particularly important for allowing PLCG1 to interact with Akt through conformational changes

Research strategy recommendations:

• Using both antibodies in parallel provides more comprehensive insights into PLCG1 activation status

• For studying general PLCG1 activation, Y783 antibodies might be preferred

• For studying specific RTK signaling pathways that preferentially phosphorylate Y771, the Ab-771 antibody would be more appropriate

• Using multiple phospho-specific antibodies provides the most complete picture of PLCG1 activation dynamics

How can I use both phosphorylated and non-phosphorylated PLCG1 antibodies in my research?

Using both phosphorylated and non-phosphorylated PLCG1 antibodies provides a comprehensive view of PLCG1 biology:

Experimental design strategies:

• Parallel detection: Run duplicate samples to detect total and phosphorylated PLCG1 separately

• Sequential detection: Strip and reprobe membranes to detect both forms on the same samples

• Normalization approach: Express phospho-PLCG1 relative to total PLCG1 to account for expression differences

Temporal activation studies:

• Time-course experiments: Monitor phosphorylation kinetics following stimulus application

• Recovery phases: Track dephosphorylation after stimulus removal

• Oscillation patterns: Some signaling pathways show cyclical activation patterns

Multi-site phosphorylation analysis:

• Compare phosphorylation at Y771 with other sites like Y783 and S1248

• Determine whether different stimuli preferentially activate specific phosphorylation sites

• Investigate the sequence of phosphorylation events

Subcellular distribution studies:

• Immunofluorescence to determine if phosphorylated PLCG1 localizes differently than total PLCG1

• Subcellular fractionation followed by Western blot to quantify distribution patterns

Quantitative considerations:

• Phosphorylation efficiency: Calculate the percentage of total PLCG1 that becomes phosphorylated

• Pathway saturation: Determine stimulus levels required for maximum phosphorylation

• Signal integration: Assess how multiple phosphorylation events collectively regulate function

This dual-antibody approach provides the most complete picture of PLCG1 regulation in cellular signaling networks.