At4g13570 Antibody

What exactly is At4g13570 and what protein does it code for in plants?

At4g13570 is a gene ID associated with the ATP synthase beta subunit in Arabidopsis thaliana. Specifically, this gene corresponds to components of ATP synthase complexes found in both chloroplasts and mitochondria. The gene product is crucial for energy metabolism in plants, being part of the F-type ATP synthase that catalyzes ATP synthesis during photosynthetic and respiratory processes .

The protein encoded by At4g13570 functions as part of the catalytic core of ATP synthase, with chloroplastic ATP synthase subunit beta (AtCg00480) having an expected molecular weight of approximately 53.9 kDa in Arabidopsis thaliana. The mitochondrial ATP synthase subunit beta-1 (At5g08670) serves a similar function in mitochondrial energy production .

How are antibodies against At4g13570 typically generated for research applications?

Antibodies targeting At4g13570 protein products are typically generated using synthetic peptide immunogens. The standard approach involves conjugating a synthetic peptide derived from conserved regions of beta subunits of F-type ATP synthases to a carrier protein such as KLH (Keyhole Limpet Hemocyanin). This conjugated immunogen is then used to immunize rabbits to produce polyclonal antibodies that recognize the target protein .

The peptide sequence used for immunization is carefully selected from conserved regions across multiple species, allowing the resulting antibodies to function as "global antibodies" with reactivity across plant, algal, and sometimes bacterial F-type ATP synthases. This cross-reactivity makes these antibodies particularly valuable for comparative studies across different organisms .

What are the key applications for At4g13570 antibodies in plant research?

At4g13570 antibodies serve multiple critical functions in plant molecular biology research:

• Western blot analysis: Used at dilutions of 1:2000-1:5000 for quantifying ATP synthase beta subunit expression levels, with an expected molecular weight of approximately 53.9 kDa in Arabidopsis thaliana .

• Blue Native-PAGE (BN-PAGE): Applied at 1:5000 dilution for studying native protein complexes and ATP synthase assembly .

• Immunofluorescence (IF): Utilized at 1:100 dilution for subcellular localization studies to visualize ATP synthase distribution within plant cells .

• Ultrastructure Expansion Microscopy (U-ExM): Employed at 1:2500 dilution for high-resolution imaging of ATP synthase positioning within organelles .

These applications allow researchers to investigate energy metabolism, organelle development, and stress responses in plants by tracking changes in ATP synthase expression and localization.

Which plant species have confirmed reactivity with commercially available At4g13570 antibodies?

Commercial antibodies against the ATP synthase beta subunit have demonstrated confirmed reactivity across a wide range of plant species. The available data indicates extensive cross-reactivity, making these antibodies valuable tools for comparative studies:

This broad cross-reactivity stems from the highly conserved nature of ATP synthase beta subunits across plant species .

What considerations should be made when optimizing Western blot protocols using At4g13570 antibodies?

When optimizing Western blot protocols with At4g13570 antibodies, several methodological considerations can improve results:

Sample preparation considerations:

• ATP synthase complexes are membrane-associated proteins requiring effective solubilization. Use of appropriate detergents (typically 1-2% SDS) is crucial for complete extraction.

• Samples should be prepared with protease inhibitors to prevent degradation of the target protein.

• Heat samples at 95°C for 5 minutes in loading buffer containing reducing agents to ensure complete denaturation.

Electrophoresis and transfer optimization:

• Use 10-12% acrylamide gels for optimal resolution of the ~53.9 kDa target protein.

• Transfer to PVDF membranes may yield better results than nitrocellulose due to the hydrophobic nature of membrane proteins.

• Extended transfer times (90-120 minutes) or lower amperage overnight transfers may improve transfer efficiency of membrane-associated proteins.

Detection recommendations:

• The recommended antibody dilution range of 1:2000-1:5000 should be empirically optimized for each experimental system .

• Blocking with 5% non-fat dry milk in TBS-T is generally effective, but BSA may sometimes reduce background.

• Extended primary antibody incubation (overnight at 4°C) often yields more specific signals.

The antibody detects the expected molecular weight of 53.9 kDa in Arabidopsis thaliana, 51.7 kDa in Synechocystis PCC 6803, and 53.7 kDa in Spinacia oleracea, reflecting slight variations in protein size across species .

How can researchers differentiate between chloroplastic and mitochondrial ATP synthase beta subunits when using these antibodies?

Differentiating between chloroplastic and mitochondrial ATP synthase beta subunits presents a methodological challenge since the available At4g13570 antibodies recognize both forms. Researchers can employ several approaches to distinguish between these isoforms:

Subcellular fractionation:

• Isolate chloroplasts and mitochondria using differential centrifugation or percoll gradient methods.

• Perform Western blot analysis on these purified organelle fractions to identify the distinct forms.

• The chloroplastic ATP synthase subunit beta (AtCg00480) and mitochondrial ATP synthase subunit beta-1 (At5g08670) can be distinguished by their slightly different migration patterns on SDS-PAGE.

Immunofluorescence co-localization:

• Use the At4g13570 antibody (1:100 dilution) alongside organelle-specific markers.

• Co-stain with chloroplast markers (e.g., anti-Rubisco) or mitochondrial markers (e.g., anti-COX2).

• Confocal microscopy analysis will reveal distinct localization patterns.

Blue Native-PAGE analysis:

• The chloroplastic and mitochondrial ATP synthase complexes have different molecular weights and migration patterns in native gels.

• Use the antibody at 1:5000 dilution for BN-PAGE to visualize the distinct complexes.

• This approach allows analysis of intact ATP synthase complexes from different organelles .

These techniques allow researchers to determine the relative abundance and distribution of chloroplastic versus mitochondrial ATP synthase beta subunits under various experimental conditions.

What approaches can resolve inconsistent results when using At4g13570 antibodies in different experimental systems?

When confronting inconsistent results with At4g13570 antibodies across different experimental systems, researchers should implement a systematic troubleshooting approach:

Verification of antibody functionality:

• Always include positive controls from well-characterized species (e.g., Arabidopsis thaliana, Spinacia oleracea) with confirmed reactivity .

• Consider testing antibody from different lots or sources if persistent problems occur.

• Verify recognition pattern through preliminary titration experiments across a range of antibody concentrations.

Sample preparation optimization:

• ATP synthase complexes are sensitive to extraction conditions. Test multiple extraction buffers with different detergent compositions and concentrations.

• For recalcitrant samples, consider non-denaturing extraction for native protein confirmation followed by denaturing methods.

• Ensure complete protein denaturation through extended heating (5-10 minutes) in sample buffer containing adequate SDS and reducing agents.

Cross-validation approaches:

• Use orthogonal methods to confirm results (e.g., if Western blot is inconsistent, validate with immunofluorescence).

• Consider using mass spectrometry to confirm protein identity in bands recognized by the antibody.

• For novel species, sequence comparison of the ATP synthase beta subunit with known reactive species can predict likelihood of antibody recognition.

Statistical handling of variability:

• When working with semi-quantitative analyses, increase biological replicates (minimum n=3) to account for natural variation.

• Apply appropriate statistical tests (typically ANOVA with post-hoc analysis) to determine if observed differences are significant.

• Consider normalization to multiple housekeeping proteins rather than a single reference.

Implementation of these methodological refinements can significantly improve consistency across experimental systems and increase confidence in results obtained with At4g13570 antibodies.

How can At4g13570 antibodies be integrated into transcriptome-based studies of plant energy metabolism?

Integrating At4g13570 antibodies into transcriptome-based studies creates powerful multi-omics approaches for investigating plant energy metabolism:

Correlation of transcript and protein levels:

• Use transcriptome data to identify differential expression of ATP synthase genes under experimental conditions.

• Apply Western blotting with At4g13570 antibodies (1:2000-1:5000 dilution) to quantify corresponding protein levels.

• This combined approach reveals potential post-transcriptional regulation mechanisms affecting ATP synthase complex assembly.

In transcriptome studies similar to those performed by Axelos et al. (1992), significant changes in gene expression have been documented across thousands of genes. For instance, in the comparison between habituated and non-habituated Arabidopsis callus cultures, SAM analysis identified 440 up-regulated genes and 405 down-regulated genes . The integration of protein-level analysis using At4g13570 antibodies can validate whether these transcriptional changes translate to altered ATP synthase protein levels.

Temporal dynamics investigation:

• Design time-course experiments measuring both transcript levels via RT-qPCR or RNA-seq and protein levels via immunoblotting.

• This approach reveals timing differences between transcriptional changes and protein accumulation.

• Particularly valuable for studying stress responses where energy metabolism adaptation is critical.

Tissue-specific expression analysis:

• Combine in situ hybridization for mRNA localization with immunofluorescence using At4g13570 antibodies (1:100 dilution).

• This dual approach localizes both transcript and protein within tissue contexts.

• Especially useful for developmental studies and heterogeneous tissues with differential energy requirements.

As shown in the transcriptome analysis by Axelos et al., different experimental conditions can result in vastly different numbers of differentially expressed genes:

Integrating protein-level analysis with such transcriptome data provides crucial insights into which transcriptional changes result in functional alterations to energy metabolism .

What methodologies can effectively employ At4g13570 antibodies to study plant responses to environmental stresses?

Environmental stresses significantly impact plant energy metabolism, making At4g13570 antibodies valuable tools for studying stress responses through several methodological approaches:

Quantitative western blot analysis of stress responses:

• Subject plants to specific stresses (drought, salinity, temperature extremes, pathogen exposure).

• Harvest tissues at defined time points and perform western blotting with At4g13570 antibodies (1:2000-1:5000 dilution).

• Quantify changes in ATP synthase beta subunit levels normalized to appropriate loading controls.

• This approach reveals how energy generation capacity changes during stress adaptation.

Subcellular relocalization studies:

• Use immunofluorescence (1:100 antibody dilution) to track potential stress-induced changes in ATP synthase localization or organization.

• Apply confocal microscopy for high-resolution imaging of potential organelle morphology changes.

• This methodology can reveal how stress affects the structural integrity and organization of energy-producing organelles.

Blue Native-PAGE analysis of complex integrity:

• Apply BN-PAGE with At4g13570 antibodies (1:5000 dilution) to assess ATP synthase complex assembly status under stress.

• This approach determines whether stress conditions affect the integrity of ATP synthase complexes rather than just protein levels.

• Particularly informative for understanding mechanism-level impacts of stress on energy production machinery.

Comparative analysis across stress-tolerant variants:

• Compare ATP synthase responses in stress-tolerant vs. susceptible varieties of the same species.

• This approach can identify energy metabolism adaptations contributing to stress resilience.

• Particularly valuable for crop improvement research targeting enhanced stress tolerance.

These methodological approaches with At4g13570 antibodies provide deep insights into how plants modulate their energy production systems to cope with environmental challenges, connecting molecular-level changes to physiological adaptations.

How should researchers interpret cross-reactivity patterns when studying novel plant species?

When studying novel plant species with At4g13570 antibodies, cross-reactivity interpretation requires systematic analysis:

Evolutionary conservation assessment:

• ATP synthase beta subunits are highly conserved across species, explaining the broad cross-reactivity observed with At4g13570 antibodies .

• For novel species, perform sequence alignments of the ATP synthase beta subunit against confirmed reactive species.

• Higher sequence identity (>70%) in the antibody epitope region strongly predicts successful cross-reactivity.

Molecular weight variation analysis:

• ATP synthase beta subunits show slight molecular weight variations across species: 53.9 kDa in Arabidopsis thaliana, 51.7 kDa in Synechocystis PCC 6803, and 53.7 kDa in Spinacia oleracea .

• For novel species, expect similar variation based on the predicted protein size from genomic data.

• Minor shifts in apparent molecular weight (±2-3 kDa) are typically acceptable and reflect species-specific differences rather than non-specific binding.

Specificity confirmation methods:

• For definitive validation in novel species, perform peptide competition assays by pre-incubating the antibody with the immunogenic peptide before application.

• Disappearance of the signal confirms specific binding to the ATP synthase beta subunit.

• For species with genome information, knockout/knockdown studies provide additional validation of antibody specificity.

Cross-validation with multiple experimental approaches:

• Confirm western blot results with immunofluorescence localization to expected subcellular compartments (chloroplasts, mitochondria).

• Consistency across multiple experimental methods significantly strengthens confidence in cross-reactivity interpretation.

These interpretation guidelines help researchers confidently extend the use of At4g13570 antibodies to novel plant species while maintaining scientific rigor.

What insights can At4g13570 antibody studies provide about plant cell habituation processes?

Studies using At4g13570 antibodies can yield significant insights into plant cell habituation processes, particularly in relation to energy metabolism reprogramming:

Energy metabolism shifts during habituation:

• Habituation involves adaptive changes allowing plant cells to grow without normally required hormones.

• Using At4g13570 antibodies to quantify ATP synthase levels in habituated versus non-habituated cells reveals alterations in energy production capacity.

• This approach can elucidate whether energy metabolism reprogramming is a key component of the habituation process.

In transcriptome studies of habituated Arabidopsis callus cultures, comparison between habituated cells (T87 - BA) and non-habituated cells (FC + BA) revealed 440 up-regulated genes and 405 down-regulated genes . Many of these changes may reflect altered energy requirements during habituation, which can be validated at the protein level using At4g13570 antibodies.

Organelle dynamics during habituation:

• Immunofluorescence studies with At4g13570 antibodies (1:100 dilution) can track changes in chloroplast and mitochondrial morphology and abundance during habituation.

• These analyses reveal whether habituation involves remodeling of energy-producing organelles.

• Particularly informative when combined with markers for organelle division or autophagy.

Comparative protein complex composition:

• Blue Native-PAGE with At4g13570 antibodies (1:5000 dilution) allows comparison of ATP synthase complex composition in habituated versus non-habituated cells.

• This approach can identify potential alterations in complex assembly or stability during habituation.

• May reveal novel adaptive mechanisms in energy production machinery.

The transcriptome analysis data below highlights the scale of global gene expression changes during habituation, providing context for targeted ATP synthase studies:

These transcriptome-level changes provide a framework for targeted investigation of ATP synthase remodeling during habituation using At4g13570 antibodies .

How can researchers effectively combine At4g13570 antibody data with other protein markers for comprehensive energy metabolism studies?

Combining At4g13570 antibody data with other protein markers creates powerful multi-parameter analyses of plant energy metabolism:

Coordinated energy pathway analysis:

• Pair At4g13570 antibodies with markers for other components of energy metabolism pathways:

  • Photosynthetic markers: PsbA (D1), PsaA, Rubisco

  • Respiratory markers: Cytochrome c oxidase, alternative oxidase

  • Metabolic enzymes: Phosphoglycerate kinase, pyruvate dehydrogenase

• This multi-protein approach provides a comprehensive view of energy pathway coordination and regulation.

• Particularly valuable for understanding how plants balance different energy-generating systems under changing conditions.

Organelle-specific stress response profiling:

• Combine At4g13570 antibodies with markers for organelle stress:

  • Chloroplast stress: HSP70B, ELIP

  • Mitochondrial stress: mtHSP70, AOX1

  • ROS markers: SOD, APX

• This approach reveals how energy production systems respond to specific organelle stress conditions.

• Helps distinguish between generic stress responses and energy metabolism-specific adaptations.

Protein-protein interaction networks:

• Use At4g13570 antibodies in co-immunoprecipitation studies to identify protein interaction partners.

• Apply to different physiological conditions to map dynamic changes in the ATP synthase interactome.

• This approach can uncover novel regulatory mechanisms controlling energy production.

Temporal dynamics of multi-protein responses:

• Design time-course experiments measuring multiple protein markers alongside At4g13570.

• Analyze temporal sequences of protein abundance changes to identify regulatory hierarchies.

• Particularly informative for understanding signaling cascades that ultimately affect energy metabolism.

These integrated approaches transcend single-protein studies to provide systems-level insights into plant energy metabolism regulation and adaptation.

What approaches can overcome sample preparation challenges for membrane-associated At4g13570 proteins?

ATP synthase complexes are membrane-associated proteins that present unique extraction and preparation challenges. Several methodological approaches can optimize sample preparation:

Extraction buffer optimization:

• For optimal ATP synthase extraction, use buffers containing adequate detergent concentrations:

  • For native applications: 1-2% digitonin or 0.5-1% n-dodecyl β-D-maltoside (DDM)

  • For denaturing applications: 2% SDS or 1% Triton X-100 with 0.5% sodium deoxycholate

• Include protease inhibitor cocktail to prevent degradation during extraction.

• Buffer pH between 7.4-8.0 typically preserves ATP synthase integrity while allowing efficient extraction.

Membrane fraction enrichment protocols:

• For enhanced detection sensitivity, prepare chloroplast or mitochondrial membrane fractions:

  • Homogenize tissue in isolation buffer (330 mM sorbitol, 50 mM HEPES-KOH pH 7.5, 2 mM EDTA)

  • Filter through miracloth and centrifuge at 1,000 × g for 5 minutes

  • Recover organelles from the pellet and lyse in hypotonic buffer

  • Centrifuge at 20,000 × g to pellet membrane fractions

  • Resuspend membranes in appropriate buffer for downstream applications

• This approach concentrates ATP synthase complexes and removes potentially interfering soluble proteins.

Cryogenic grinding optimization:

• For recalcitrant tissues (woody stems, seeds), cryogenic grinding significantly improves extraction:

  • Flash-freeze tissue in liquid nitrogen

  • Grind to fine powder while maintaining frozen state

  • Add pre-warmed (37°C) extraction buffer directly to frozen powder

  • Mix immediately to prevent protein degradation

• This method maximizes cell disruption while minimizing protein degradation.

Sample storage recommendations:

• Store extracted protein samples at -80°C with 10% glycerol as cryoprotectant.

• Avoid repeated freeze-thaw cycles, as they significantly reduce ATP synthase detection.

• For longer-term storage, aliquot samples before freezing to prevent multiple freeze-thaw cycles.

These optimized sample preparation methods significantly improve the detection and analysis of At4g13570 proteins across various experimental applications.

How can researchers optimize immunofluorescence protocols for subcellular localization of At4g13570 proteins?

Optimizing immunofluorescence protocols for ATP synthase localization requires careful attention to fixation, permeabilization, and detection parameters:

Fixation optimization:

• Test multiple fixation methods to preserve ATP synthase epitopes while maintaining cellular architecture:

  • Paraformaldehyde (4%) for 20-30 minutes preserves most epitopes while maintaining structure

  • Glutaraldehyde (0.1-0.5%) combined with paraformaldehyde improves membrane structure preservation

  • Methanol fixation (-20°C, 10 minutes) can provide superior results for some applications

• Always prepare fixatives fresh and maintain proper pH (7.2-7.4) for optimal epitope preservation.

Permeabilization balancing:

• Carefully balance permeabilization to allow antibody access while preserving membrane structures:

  • For leaf tissues: 0.1-0.3% Triton X-100 for 10-15 minutes

  • For cultured cells: 0.05-0.1% Triton X-100 for 5-10 minutes

  • Alternative: 0.05-0.1% saponin maintains membrane structure while allowing antibody access

• Excessive permeabilization disrupts organelle membranes and reduces signal specificity.

Signal amplification strategies:

• Implement signal amplification for improved detection of low-abundance targets:

  • Tyramide signal amplification can enhance signal while maintaining specificity

  • Use of high-sensitivity detection systems (PMT settings, high-QE cameras)

  • Sequential antibody application can enhance signal over traditional methods

• At recommended 1:100 antibody dilution, incubation overnight at 4°C often provides optimal signal-to-noise ratio .

Multi-parameter imaging approaches:

• Combine At4g13570 antibody with organelle markers for precise localization:

  • MitoTracker dyes for mitochondria co-localization

  • Chlorophyll autofluorescence for chloroplast co-localization

  • Additional antibodies against organelle markers (using spectrally distinct fluorophores)

• Use spectral unmixing to separate overlapping fluorescence signals.

For advanced applications, the antibody has been successfully used in Ultrastructure Expansion Microscopy (U-ExM) at 1:2500 dilution, allowing super-resolution imaging of ATP synthase distribution within organelles .

These optimized protocols significantly improve detection sensitivity and specificity in immunofluorescence applications with At4g13570 antibodies.

How might At4g13570 antibodies contribute to understanding plant adaptation to climate change?

At4g13570 antibodies offer significant potential for climate change adaptation research through several innovative approaches:

Temperature stress adaptation mechanisms:

• Use At4g13570 antibodies to quantify ATP synthase responses to incremental temperature changes mimicking climate warming scenarios.

• Compare ATP synthase complex stability across plant varieties with different temperature tolerances.

• This approach helps identify energy metabolism adaptations that confer resilience to temperature fluctuations.

Drought response energy reconfiguration:

• Apply At4g13570 antibodies to track ATP synthase remodeling during progressive water limitation and recovery.

• Compare responses across drought-tolerant and susceptible varieties.

• This methodology reveals how energy production systems adapt to water-limited conditions, informing drought-tolerance breeding strategies.

Elevated CO₂ response investigations:

• Use immunoblotting and BN-PAGE with At4g13570 antibodies to analyze ATP synthase responses to elevated atmospheric CO₂.

• This approach helps understand how increased carbon fixation potential affects energy production machinery.

• Particularly relevant for predicting crop responses to rising atmospheric CO₂ levels.

Multiple stress interaction studies:

• Apply At4g13570 antibodies in factorial experimental designs combining multiple climate-related stresses (heat, drought, elevated CO₂).

• This approach reveals how plants prioritize energy metabolism adjustments under complex stress scenarios.

• Provides insights more relevant to field conditions than single-stress studies.

Comparative analysis across climate gradients:

• Compare ATP synthase responses in the same species collected across natural climate gradients.

• This approach identifies adaptive energy metabolism traits that have evolved in response to different climatic conditions.

• Particularly valuable for identifying genetic resources for climate resilience breeding.

These research directions using At4g13570 antibodies can significantly advance our understanding of how plant energy systems adapt to changing climatic conditions, with important implications for crop improvement and ecosystem management under climate change.

What emerging technologies might enhance the research applications of At4g13570 antibodies?

Several emerging technologies have the potential to dramatically expand research applications of At4g13570 antibodies:

Single-cell proteomics integration:

• Combine At4g13570 antibodies with emerging single-cell proteomic techniques.

• This approach would reveal cell-to-cell variation in ATP synthase expression within plant tissues.

• Particularly valuable for understanding energy metabolism heterogeneity across different cell types and developmental stages.

Super-resolution microscopy applications:

• Expand on existing Ultrastructure Expansion Microscopy (U-ExM) applications with other super-resolution techniques:

  • STORM/PALM imaging for nanoscale visualization of ATP synthase distribution

  • 3D-SIM for volumetric analysis of ATP synthase organization within organelles

  • STED microscopy for live-cell imaging of ATP synthase dynamics

• These approaches would reveal previously inaccessible details of ATP synthase organization and dynamics.

Multiplexed antibody imaging systems:

• Implement emerging multiplexed antibody imaging technologies with At4g13570 antibodies:

  • Cyclic immunofluorescence (CycIF) for sequential imaging of multiple proteins

  • DNA-barcoded antibody systems for highly multiplexed imaging

  • Mass cytometry for simultaneous detection of dozens of proteins

• These technologies would enable comprehensive mapping of energy metabolism protein networks.

Microfluidic-based live cell analysis:

• Integrate At4g13570 antibodies with emerging microfluidic live-cell imaging platforms.

• Develop membrane-permeable fluorescent antibody derivatives for live-cell applications.

• This approach would enable real-time monitoring of ATP synthase dynamics in response to environmental stimuli.

Machine learning integration for image analysis:

• Apply emerging machine learning algorithms to analyze complex immunofluorescence datasets.

• Develop automated pipelines for quantifying ATP synthase distribution patterns across large image datasets.

• This computational approach would enable high-throughput phenotyping of energy metabolism traits across large plant populations.