OFUT23 Antibody

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Description

Antibody Structure and Function

Antibodies are Y-shaped glycoproteins composed of two heavy chains and two light chains, connected by disulfide bonds . Their structure includes:

  • Variable regions (V_H and V_L): Recognize specific antigens via complementarity-determining regions (CDRs).

  • Constant regions (C_H and C_L): Mediate interactions with immune effector cells via the Fc region .

Antibody Characterization Approaches

If OFUT23 Antibody were a novel reagent, its characterization would likely follow methods described in studies like those by Ayoubi et al. (2023) :

  • KO cell lines: Used as controls to validate antibody specificity in Western blotting and immunofluorescence .

  • Recombinant antibodies: Often outperform monoclonal/polyclonal antibodies in assays .

  • Fc region analysis: Critical for understanding effector functions (e.g., FcRn binding for IgG half-life) .

Example of Antibody Assay Data

A comparable antibody, such as those targeting FGF23, demonstrates the importance of standardized assays. Table 1 (below) illustrates typical assay parameters for FGF23 antibodies :

Assay NameDetection LimitAntibodies UsedSample Type
LIAISON® FGF 235 pg/mL3 monoclonal antibodies (N/C-terminal)EDTA plasma
Human FGF-23 ELISA15.6 pg/mLRecombinant antibodiesSerum/plasma
MedFrontier CLEIA10 pg/mL2 mouse monoclonal antibodiesSerum

Research Challenges and Recommendations

The development of OFUT23 Antibody would face challenges similar to those highlighted in antibody characterization studies :

  • Specificity validation: Requires orthogonal methods (e.g., mass spectrometry, CRISPR-edited controls).

  • Cross-reactivity: Must be tested against homologous proteins or isoforms.

  • Stability testing: Includes thermal stability, freeze-thaw cycles, and long-term storage conditions.

Product Specs

Buffer
Preservative: 0.03% Proclin 300
Constituents: 50% Glycerol, 0.01M Phosphate Buffered Saline (PBS), pH 7.4
Form
Liquid
Lead Time
Made-to-order (14-16 weeks)
Synonyms
OFUT23 antibody; GT65 antibody; At3g05320 antibody; T12H1.29 antibody; O-fucosyltransferase 23 antibody; O-FucT-23 antibody; EC 2.4.1.- antibody; O-fucosyltransferase family protein antibody
Target Names
OFUT23
Uniprot No.

Target Background

Database Links

KEGG: ath:AT3G05320

STRING: 3702.AT3G05320.1

UniGene: At.40691

Protein Families
Glycosyltransferase GT65R family
Subcellular Location
Membrane; Single-pass type II membrane protein.

Q&A

What is the primary mechanism of action for OFUT23 Antibody in experimental models?

OFUT23 Antibody functions through specific binding to its target antigen, similar to how antibodies like FGF-23 bind to their respective targets. The mechanism involves complementarity-determining regions (CDRs) that create a binding interface with the target epitope. This interaction depends on both the position and orientation of amino acids, particularly the side chains extending from the protein backbone .

In experimental settings, OFUT23 Antibody can be used to detect, neutralize, or precipitate its target protein. When studying proliferation mechanisms, researchers can establish dose-dependent relationships between the antibody and cellular responses, as demonstrated with FGF-23 antibody in NIH-3T3 mouse embryonic fibroblast cells .

The binding specificity is primarily determined by the antibody's paratope structure, with critical residues (hotspots) concentrated at the variable heavy (VH) and variable light (VL) interfaces creating a concave surface that recognizes specific epitopes on the target protein .

How can researchers validate OFUT23 Antibody specificity before implementing it in critical experiments?

Validation of OFUT23 Antibody requires a systematic approach involving multiple complementary methods:

  • Western blot analysis using positive and negative control samples

  • Knockout/knockdown validation to confirm signal absence when the target is removed

  • Immunoprecipitation followed by mass spectrometry for binding partner verification

  • Peptide competition assays to confirm epitope specificity

  • Paratope alanine scanning to identify critical binding residues

For the alanine scanning approach, systematic mutation of CDR residues to alanine followed by binding analysis can identify the residues essential for antigen recognition. This method revealed, for example, that certain antibodies have key residues concentrated at the VH-VL interface that significantly impact binding when mutated .

Additionally, researchers should perform epitope alanine scanning by mutating exposed residues on the target protein to identify the specific binding interface, as demonstrated in studies with FGF23-Burosumab interactions .

What are the optimal storage and handling conditions for maintaining OFUT23 Antibody stability?

For optimal performance and longevity of OFUT23 Antibody preparations:

  • Store concentrated stock solutions at -20°C or -80°C for long-term stability

  • Aliquot antibody solutions before freezing to avoid repeated freeze-thaw cycles

  • For working solutions, store at 4°C for no more than two weeks

  • Include protein stabilizers such as BSA (0.1-1%) in diluted solutions

  • Avoid exposure to extreme pH conditions or organic solvents

  • Protect from direct light exposure, especially for conjugated antibodies

When reconstituting lyophilized antibody preparations, use the appropriate buffer as recommended in product documentation. Similar to other research antibodies, using a reconstitution calculator can help achieve the desired concentration with precision .

Proper handling during experimental procedures is equally important - maintain samples on ice when possible, and avoid repeated vigorous mixing that can lead to protein denaturation.

What control samples should be included when using OFUT23 Antibody in experimental designs?

A comprehensive control strategy for OFUT23 Antibody experiments should include:

  • Positive control: Sample known to express the target protein

  • Negative control: Sample confirmed not to express the target protein

  • Isotype control: Non-specific antibody of the same isotype and concentration

  • Secondary antibody-only control: To assess non-specific binding of detection reagents

  • Blocking peptide control: To demonstrate binding specificity via competition

When evaluating antibody effects in functional assays, include a neutralization control, similar to the approach used for FGF-23 antibody where antibody-mediated neutralization was measured as a function of increasing antibody concentration .

For quantitative analysis, standard curves using recombinant target protein at known concentrations should be included to enable accurate quantification of experimental samples.

How should researchers optimize OFUT23 Antibody concentration for western blotting protocols?

Optimization of OFUT23 Antibody concentration for western blotting requires a systematic titration approach:

  • Begin with a broad concentration range (e.g., 0.1-10 μg/ml) based on manufacturer recommendations

  • Perform sequential dilutions with 2-3 fold increments

  • Maintain constant protein loading and transfer conditions across test blots

  • Evaluate signal-to-noise ratio at each concentration

  • Select the minimal concentration that provides consistent specific signal

Antibody ConcentrationSignal IntensityBackgroundSignal-to-Noise RatioRecommendation
10 μg/mlVery StrongHighLowToo concentrated
5 μg/mlStrongModerateModerateMay be suitable
1 μg/mlModerateLowHighOptimal for most samples
0.5 μg/mlWeak-ModerateVery LowModerateMay be suitable for abundant targets
0.1 μg/mlWeakMinimalLowToo dilute for most applications

Include optimization of blocking conditions, incubation times, and washing protocols alongside antibody concentration titration. Similar to approaches used in FGF-23 antibody characterization, concentration optimization is critical for achieving reliable and reproducible results .

What considerations should guide selection of detection systems when using OFUT23 Antibody in immunohistochemistry?

Selection of appropriate detection systems for OFUT23 Antibody in immunohistochemistry should be guided by:

  • Sensitivity requirements:

    • Chromogenic detection (HRP/DAB) for routine applications

    • Tyramide signal amplification for low-abundance targets

    • Polymer-based detection systems for improved sensitivity without background

  • Multiplexing needs:

    • Fluorescent secondary antibodies for multi-target visualization

    • Sequential chromogenic methods for multiple targets

    • Spectral unmixing systems for highly multiplexed applications

  • Tissue characteristics:

    • Account for autofluorescence when selecting fluorophores

    • Consider tissue-specific background with different detection chemistries

    • Optimize antigen retrieval methods based on fixation conditions

  • Quantification requirements:

    • Linear range considerations for quantitative analysis

    • Dynamic range of detection system relative to expression levels

    • Standardization options for cross-sample comparison

When developing protocols, systematically compare detection systems while holding other variables constant. This approach parallels optimization strategies used in epitope mapping studies where detection sensitivity directly impacts the ability to characterize binding interfaces .

How can researchers design antibody-based experiments to identify protein interaction partners of OFUT23 targets?

For identifying protein interaction partners of targets recognized by OFUT23 Antibody:

  • Co-immunoprecipitation (Co-IP) approach:

    • Use OFUT23 Antibody to precipitate the target protein complex

    • Analyze precipitates using mass spectrometry to identify binding partners

    • Validate interactions using reciprocal Co-IP with antibodies against identified partners

    • Include appropriate controls (IgG control, lysate input)

  • Proximity labeling strategies:

    • Conjugate OFUT23 Antibody to biotin ligase (BioID) or peroxidase (APEX)

    • Apply to samples with active target protein complexes

    • Induce proximity-dependent biotinylation

    • Purify biotinylated proteins for identification

  • Protein crosslinking followed by immunoprecipitation:

    • Apply membrane-permeable crosslinkers to stabilize transient interactions

    • Precipitate complexes using OFUT23 Antibody

    • Analyze crosslinked partners after reversal of crosslinks

This methodological approach builds on principles used in characterizing antibody-antigen interfaces, where specific binding interactions reveal structural and functional relationships between proteins .

What computational modeling approaches can predict OFUT23 Antibody binding to novel targets?

Advanced computational methods for modeling OFUT23 Antibody interactions include:

  • Deep generative models:

    • Joint modeling of sequences and structures of CDRs using diffusion probabilistic models

    • Implementation of equivariant neural networks that account for both position and orientation of amino acids

    • Conditioning models on 3D structures of the antigen to predict binding compatibility

  • Structure-guided design approaches:

    • Molecular docking to predict antibody-antigen complexes

    • Evaluation of binding interfaces using metrics like buried surface area and chemical complementarity

    • Analysis of interface residue contributions using computational tools like PISA

  • Optimization algorithms:

    • Sampling multiple binding poses using Monte Carlo simulations

    • Ranking poses based on correlation with experimental data

    • Refinement of structures using molecular dynamics simulations

The DiffAb model represents a state-of-the-art approach to antibody design, enabling sequence-structure co-design, fix-backbone sequence design, and antibody optimization. This model generates CDR candidates iteratively in sequence-structure space, allowing constraints to be imposed on the sampling process .

How can researchers determine binding kinetics and affinity parameters for OFUT23 Antibody?

For precise characterization of OFUT23 Antibody binding kinetics and affinity:

  • Surface Plasmon Resonance (SPR) analysis:

    • Immobilize target antigen on a sensor chip at controlled density

    • Flow OFUT23 Antibody at multiple concentrations

    • Measure association rate constant (kon), dissociation rate constant (koff)

    • Calculate equilibrium dissociation constant (KD = koff/kon)

  • Bio-Layer Interferometry (BLI):

    • Immobilize antibody or antigen on biosensor tips

    • Monitor real-time binding without microfluidics requirements

    • Calculate kinetic parameters through curve fitting

  • Isothermal Titration Calorimetry (ITC):

    • Measure heat changes during binding reactions

    • Determine thermodynamic parameters (ΔH, ΔS, ΔG)

    • Calculate binding stoichiometry and affinity constants

High-affinity antibodies like Burosumab exhibit KD values in the range of 10^-11 M, which requires sensitive instrumentation and careful experimental design to accurately measure .

TechniquePrimary AdvantagesLimitationsData Output
SPRReal-time kinetics, Low sample consumptionSurface effects may alter bindingkon, koff, KD
BLINo microfluidics, Easy setupLower sensitivity than SPRkon, koff, KD
ITCSolution-phase, Thermodynamic dataRequires larger sample amountsKD, ΔH, ΔS, n

What methods can be applied to identify critical binding residues in the OFUT23 Antibody paratope?

To identify critical binding residues in the OFUT23 Antibody paratope:

  • Alanine scanning mutagenesis:

    • Systematically substitute each CDR residue with alanine

    • Express mutant antibodies and test binding using ELISA

    • Identify residues that cause significant reduction in binding when mutated

    • Classify residues as hotspots if mutation causes >10-fold decrease in binding

  • Hydrogen-deuterium exchange mass spectrometry (HDX-MS):

    • Compare deuterium uptake patterns in free versus antigen-bound antibody

    • Identify regions with reduced exchange rates upon binding

    • Map protected regions to antibody structure

  • X-ray crystallography or Cryo-EM:

    • Determine high-resolution structure of antibody-antigen complex

    • Analyze contact residues at the binding interface

    • Measure interatomic distances to identify key interactions

In studies with other antibodies, paratope alanine scanning identified critical residues like Y33 in HCDR1 and D95 in HCDR3 that caused >100-fold decrease in binding when mutated to alanine , demonstrating the power of this approach for identifying key binding determinants.

How can epitope mapping inform OFUT23 Antibody applications in both research and diagnostic contexts?

Epitope mapping provides critical insights for OFUT23 Antibody applications:

  • In research applications:

    • Enables rational design of experiments targeting specific protein domains

    • Informs structural biology studies by identifying functionally important regions

    • Facilitates development of competing or non-competing antibody panels

    • Guides antibody engineering for enhanced specificity or affinity

  • In diagnostic applications:

    • Ensures epitope conservation across clinically relevant variants

    • Identifies epitopes that correlate with disease states or biomarker status

    • Enables development of sandwich assays using non-competing antibody pairs

    • Supports specificity validation against related proteins

  • Methodological approaches for epitope mapping:

    • Solvent accessibility calculations to identify exposed residues on target proteins

    • Systematic mutation of surface residues to alanine and binding analysis

    • Peptide array screening with overlapping peptides spanning the target protein

    • Hydrogen-deuterium exchange mass spectrometry

Studies have demonstrated that epitope alanine scanning can identify critical binding residues like H52, R76, F108, H117, and Y124 that often overlap with functionally important interfaces , providing valuable insights for research and diagnostic applications.

What strategies can resolve inconsistent OFUT23 Antibody performance across different experimental systems?

When facing inconsistent OFUT23 Antibody performance, implement this systematic troubleshooting approach:

  • Antibody factors:

    • Verify antibody integrity by SDS-PAGE under reducing/non-reducing conditions

    • Check for aggregation using dynamic light scattering

    • Confirm concentration using absorbance at 280nm with appropriate extinction coefficient

    • Consider testing multiple lots if available

  • Target protein considerations:

    • Verify epitope accessibility in different sample preparation methods

    • Assess target protein expression levels using orthogonal methods

    • Consider post-translational modifications that might affect epitope recognition

    • Test native versus denatured conditions if conformational epitopes are suspected

  • Protocol optimization:

    • Systematically adjust buffer conditions (pH, salt concentration, detergents)

    • Optimize blocking reagents to minimize background

    • Adjust incubation times and temperatures

    • Consider sample preparation variables (fixation, lysis methods)

This approach mirrors troubleshooting strategies used in antibody characterization studies, where systematic parameter adjustment is essential for optimizing experimental conditions .

How can researchers address non-specific binding issues when using OFUT23 Antibody in complex biological samples?

To address non-specific binding with OFUT23 Antibody:

  • Blocking optimization:

    • Test different blocking agents (BSA, casein, commercial blockers)

    • Increase blocking time and/or concentration

    • Include blocking agents in antibody diluent

  • Sample preparation refinement:

    • Pre-clear samples with protein A/G before antibody addition

    • Perform additional purification steps on complex samples

    • Include detergents appropriate for the application

  • Antibody dilution optimization:

    • Perform careful titration to use minimal effective concentration

    • Consider using Fab or F(ab')2 fragments to eliminate Fc-mediated binding

    • Add non-specific IgG from the same species as the antibody

  • Washing optimization:

    • Increase washing stringency gradually

    • Optimize detergent concentration in wash buffers

    • Extend washing times or increase number of washes

Non-specific binding issues can be particularly challenging when working with antibodies that have negatively charged residues in their CDRs, as these may interact with positively charged proteins in complex samples .

What methodological approaches can distinguish between specific binding and background signal in OFUT23 Antibody imaging applications?

For distinguishing specific from non-specific signals in imaging applications:

  • Control-based approaches:

    • Competitive inhibition with excess unlabeled antibody

    • Pre-adsorption with purified antigen

    • Comparison with non-binding control antibody of same isotype

    • Target knockdown/knockout validation samples

  • Signal-processing methods:

    • Spectral unmixing to separate true signal from autofluorescence

    • Background subtraction algorithms

    • Colocalization analysis with independent markers

    • Intensity threshold optimization based on control samples

  • Advanced imaging techniques:

    • Förster resonance energy transfer (FRET) to confirm molecular proximity

    • Fluorescence lifetime imaging (FLIM) to distinguish bound from unbound states

    • Super-resolution microscopy for improved signal discrimination

    • Multi-spectral imaging for autofluorescence removal

These approaches parallel methods used in antibody characterization studies where distinguishing specific binding from background is critical for accurate interpretation of results .

How can conflicting results between different antibody-based detection methods for the same target be reconciled?

When different antibody-based methods yield conflicting results:

  • Epitope accessibility analysis:

    • Determine if different methods expose different epitopes

    • Compare native versus denatured conditions across methods

    • Consider whether sample preparation affects epitope presentation

  • Sensitivity threshold evaluation:

    • Determine detection limits for each method

    • Create standard curves using recombinant protein

    • Compare dynamic range across methodologies

  • Cross-validation strategies:

    • Verify target expression using nucleic acid-based methods

    • Employ orthogonal protein detection approaches

    • Use genetic manipulation to create control samples

  • Integrated data analysis:

    • Develop normalization approaches across methods

    • Apply statistical methods appropriate for each data type

    • Consider developing integrated scoring systems

How can OFUT23 Antibody be engineered to enhance binding affinity or specificity?

Engineering OFUT23 Antibody for enhanced properties involves several methodological approaches:

  • Structure-guided CDR optimization:

    • Use computational modeling to identify suboptimal interactions

    • Introduce mutations to enhance chemical complementarity

    • Apply molecular dynamics simulations to validate stability

  • Directed evolution strategies:

    • Create CDR mutation libraries using site-directed mutagenesis

    • Screen variants using display technologies (phage, yeast, mammalian)

    • Select improved variants through iterative rounds of selection

  • Machine learning approaches:

    • Apply deep learning models like DiffAb for antibody optimization

    • Use diffusion probabilistic models to sample improved antibody variants

    • Generate antibody candidates iteratively in sequence-structure space

  • Affinity maturation methods:

    • Introduce targeted diversity in CDR regions

    • Focus mutations on hotspot residues identified by alanine scanning

    • Apply selection pressure to identify variants with enhanced binding

These approaches have been successfully applied to engineer antibodies with improved properties, as demonstrated in studies using computational approaches to optimize antibody binding .

What considerations guide the development of OFUT23 Antibody pairs for sandwich immunoassays?

Developing effective sandwich immunoassay pairs with OFUT23 Antibody requires:

  • Epitope mapping for pair selection:

    • Identify non-overlapping epitopes on the target protein

    • Select antibodies binding to distinct regions to avoid competition

    • Consider accessibility of epitopes in native protein conformation

  • Optimization of capture antibody:

    • Evaluate orientation (random versus oriented immobilization)

    • Optimize coating concentration and buffer conditions

    • Consider covalent coupling strategies for improved stability

  • Detection antibody considerations:

    • Evaluate different conjugation methods (direct versus indirect detection)

    • Optimize conjugation ratio for labeled antibodies

    • Validate detection antibody specificity in complex matrices

  • Assay performance verification:

    • Determine analytical sensitivity (limit of detection)

    • Assess analytical specificity (cross-reactivity testing)

    • Evaluate precision, accuracy, and linearity

This methodological approach parallels strategies used in diagnostic antibody development, where careful selection and optimization of antibody pairs is critical for assay performance .

How can researchers integrate OFUT23 Antibody data with other multi-omics datasets for systems biology analysis?

Integrating antibody-derived data with multi-omics approaches requires:

  • Data normalization strategies:

    • Apply appropriate transformations for each data type

    • Consider batch correction methods for cross-platform integration

    • Implement missing value imputation where appropriate

  • Correlation analysis approaches:

    • Calculate correlation coefficients between protein and transcript levels

    • Identify protein modules with coordinated expression patterns

    • Correlate protein expression with functional readouts

  • Network integration methods:

    • Construct protein interaction networks centered on OFUT23 target

    • Integrate transcript regulatory networks with protein data

    • Apply algorithms to identify functionally enriched pathways

  • Causal inference approaches:

    • Use directed acyclic graphs to model cause-effect relationships

    • Implement Bayesian network analysis for multi-omics data

    • Validate predictions with targeted intervention experiments

This integrated approach enables deeper biological insights than single-omics analyses, similar to how computational antibody design integrates sequence and structural information to predict optimal binding properties .

What methodological approaches can translate OFUT23 Antibody from research tool to diagnostic application?

Translating OFUT23 Antibody to diagnostic applications requires:

  • Analytical validation:

    • Establish precision metrics (repeatability, intermediate precision, reproducibility)

    • Determine accuracy through recovery and linearity studies

    • Define analytical measuring range and limits of detection/quantification

    • Assess analytical specificity through cross-reactivity testing

  • Clinical validation:

    • Define intended use population and reference intervals

    • Establish clinical sensitivity and specificity

    • Determine positive and negative predictive values

    • Compare performance against established reference methods

  • Standardization considerations:

    • Develop reference standards for calibration

    • Implement quality control procedures

    • Establish lot-to-lot consistency monitoring

    • Create standard operating procedures

  • Regulatory documentation:

    • Compile design history files

    • Prepare risk management documentation

    • Establish design controls and manufacturing controls

    • Address regulatory requirements for specific markets

This methodological approach parallels the rigorous validation processes used in therapeutic antibody development, ensuring that research antibodies can be effectively translated to clinical applications .

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