EMB2271 Antibody

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Description

Introduction to EMB2271 Antibody

EMB2271 Antibody is a research-grade monoclonal antibody targeting the EMB2271 protein in Arabidopsis thaliana (mouse-ear cress). It is utilized in plant molecular biology to study developmental processes, particularly those involving gametogenesis and early embryogenesis. This antibody is commercially available and serves as a critical tool for investigating homologous protein interactions and functional roles in plant models .

Gene and Protein Background

EMB2271 (At4G21130) is a gene in Arabidopsis thaliana encoding a nucleolar WD40-repeat protein. WD40-repeat proteins are structural components involved in protein-protein interactions, often critical for cellular processes such as signal transduction and cell cycle regulation.

Key Functional Relationships

EMB2271 shares 63% identity and 75% similarity with YAO (At4G05410), another Arabidopsis WD40-repeat protein essential for gametophyte development and early embryo formation . While YAO is directly implicated in embryo viability, EMB2271 may act as a functional homolog or regulatory partner, though its exact role remains under investigation.

Role in Plant Development

EMB2271 Antibody is employed to study protein localization and expression patterns during critical developmental stages:

  • Gametogenesis: Investigating EMB2271’s involvement in pollen and ovule development.

  • Early Embryogenesis: Analyzing protein dynamics in zygotic and embryonic cells .

Functional Homology to YAO

While no direct studies on EMB2271 have been published, its high sequence similarity to YAO suggests potential overlapping functions. YAO mutants exhibit defects in zygote elongation and cell division symmetry, leading to embryonic arrest . EMB2271 may participate in analogous pathways, possibly as a component of nucleolar complexes regulating RNA processing or chromatin remodeling.

Experimental Tools

The antibody enables:

  • Protein Detection: Identifying EMB2271 expression in specific tissues or developmental stages.

  • Genetic Interaction Studies: Investigating epistatic relationships with YAO or other WD40-repeat proteins.

Comparative Analysis with Homologous Proteins

EMB2271’s relationship to YAO highlights conserved functional motifs in Arabidopsis WD40-repeat proteins. Below is a comparison of key features:

FeatureYAO (At4G05410)EMB2271 (At4G21130)
Protein FamilyWD40-repeatWD40-repeat
Subcellular LocalizationNucleolusLikely nucleolus
Developmental RoleGametogenesis, embryogenesisPutative gametogenesis
Sequence Identity63% with EMB2271N/A

Data derived from phylogenetic analysis .

Product Specs

Buffer
Preservative: 0.03% Proclin 300
Constituents: 50% Glycerol, 0.01M PBS, pH 7.4
Form
Liquid
Lead Time
Made-to-order (14-16 weeks)
Synonyms
EMB2271 antibody; At4g21130 antibody; F7J7.70 antibody; U3 snoRNP-associated protein-like EMB2271 antibody; Protein EMBRYO DEFECTIVE 2271 antibody; Protein YAO-like antibody
Target Names
EMB2271
Uniprot No.

Target Background

Function
EMB2271 Antibody is a component of a nucleolar small nuclear ribonucleoprotein particle (snoRNP). This antibody is believed to play a role in the processing and modification of pre-ribosomal RNA. It is essential for embryogenesis and may function during late embryogenesis.
Database Links

KEGG: ath:AT4G21130

STRING: 3702.AT4G21130.1

UniGene: At.54451

Protein Families
WD repeat RRP9 family
Subcellular Location
Nucleus, nucleolus.

Q&A

What is the EMB2271 Antibody and what are its primary target mechanisms?

EMB2271 Antibody belongs to the monoclonal antibody class, designed to target specific epitopes with high specificity. Similar to therapeutic antibodies studied in viral research, EMB2271 functions by binding to its target glycoprotein through complementarity-determining regions (CDRs) . The antibody can exhibit multiple protective mechanisms, including direct neutralization, immune cell recruitment, and structural rearrangement of target proteins that facilitates clearance . Understanding these mechanisms requires comprehensive binding studies using techniques such as surface plasmon resonance and epitope mapping.

What isolation methods are most effective for obtaining EMB2271 Antibody?

Single B-cell receptor (BCR) cloning represents the most efficient approach for isolating antibodies like EMB2271. This technique allows for:

  • Rapid production of antigen-specific monoclonal antibodies within weeks

  • Preservation of the natural pairing of heavy (VH) and light chains (VL) from B cells

  • Higher yield of high-affinity antibodies compared to phage display libraries

While traditional hybridoma methods were once standard, single BCR cloning has emerged as the preferred approach for generating research-grade antibodies. This method accurately reflects the natural B cell response during immune reactions, providing a more physiologically relevant antibody product .

What are the optimal storage conditions for maintaining EMB2271 Antibody activity?

Proper storage is critical for maintaining antibody functionality. Based on standard protocols for monoclonal antibodies:

  • Store concentrated antibody (>1 mg/mL) at -80°C for long-term preservation

  • For working solutions, aliquot at -20°C to avoid freeze-thaw cycles

  • Include stabilizing proteins like BSA (0.1-1%) to prevent denaturation

  • Monitor glycosylation patterns regularly as they affect stability and functionality

Validation experiments should be performed after extended storage periods to confirm retained activity, particularly for critical applications.

How can single B-cell screening improve EMB2271 Antibody research?

Single B-cell screening offers several methodological advantages:

  • It provides an unbiased approach for simultaneous analysis of expressed IgH and IgL chain genes

  • It enables isolation of rare antibody-secreting cells with unique properties

  • It facilitates the mapping of the B cell repertoire response to specific antigens

  • It allows for investigation of memory B cell (MBC) behavior following infection or vaccination

This technique is particularly valuable for studying antibody evolution and affinity maturation processes, which can inform the development of improved antibody variants with enhanced specificity or functionality.

What techniques are most effective for analyzing EMB2271 Antibody's glycosylation profile?

Glycosylation significantly impacts antibody function, stability, and immunogenicity. The FDA has highlighted several techniques for glycan profiling:

  • Lectin microarray analysis provides rapid, simple profiling with minimal sample preparation

  • Mass spectrometry offers detailed structural characterization of glycan moieties

  • Capillary electrophoresis with laser-induced fluorescence detection enables quantitative assessment of glycan distributions

When comparing glycosylation profiles between batches of EMB2271 Antibody, researchers should focus on both the glycan composition and the site-specific occupancy, as both factors influence antibody properties.

How do researchers interpret Anti-Drug Antibody (ADA) data when using EMB2271 in experimental models?

ADA analysis for EMB2271 should follow a multi-tiered testing approach:

  • Screening assay: Identify potential ADA-positive samples

  • Confirmatory assay: Verify positive results through competitive inhibition

  • Neutralizing antibody (NAb) assessment: Determine if antibodies interfere with binding functionality

  • Titer determination: Quantify antibody levels through serial dilutions

Data interpretation should consider:

ParameterInterpretationResearch Implication
Treatment-induced ADAPost-baseline titer ≥4-fold greater than baselineMay indicate reduced efficacy over time
Transiently Positive ADAAt least one positive assessment, not persistentMinimal impact on long-term studies
Persistently Positive ADAPositive at ≥2 assessments with ≥16 weeks betweenSignificant concern for chronic applications
NAb IncidenceAt least one positive NAb result at any timepointCritical for function-dependent experiments

ADA development can significantly impact pharmacokinetic parameters, reducing maximum plasma concentration (Cmax) and area under the curve (AUC), particularly when neutralizing antibodies bind to active sites .

What controls should be included in experiments utilizing EMB2271 Antibody?

Robust experimental design requires:

  • Isotype control: Matched antibody of the same class but different specificity

  • Concentration-matched controls: Serial dilutions to establish dose-response relationships

  • Cross-reactivity controls: Testing against related and unrelated targets to confirm specificity

  • Positive and negative sample controls: Known samples that validate assay performance

For protection studies similar to those performed with viral antibodies, time-course experiments should include multiple antibody doses administered at different timepoints relative to challenge, as demonstrated in Marburg virus studies where antibody administration 24 hours post-infection provided complete protection .

How can researchers address contradictory results when using EMB2271 Antibody across different experimental systems?

When facing contradictory results:

  • Validate antibody binding in each system: Different cellular environments may affect epitope accessibility

  • Assess batch variation: Compare lot numbers and request certificate of analysis data

  • Examine buffer compatibility: Ionic strength, pH, and detergents can impact binding

  • Consider post-translational modifications: Target protein modifications may differ between systems

  • Evaluate expression levels: Target abundance can influence apparent antibody effectiveness

Methodologically, researchers should implement standardized protocols with detailed record-keeping of all experimental parameters to isolate variables causing discrepancies.

What structural analysis techniques provide the most insight into EMB2271 Antibody's function?

X-ray crystallography represents a gold standard for structural analysis, as demonstrated in antibody studies against the Lassa virus:

  • Provides atomic-level resolution of antibody-antigen complexes

  • Reveals critical binding residues and conformational changes upon binding

  • Enables structure-guided optimization of antibody properties

The Advanced Photon Source (APS) facility has been particularly valuable for characterizing protective antibodies, allowing researchers to visualize molecular interactions that explain protection mechanisms . For EMB2271, similar approaches would illuminate structure-function relationships crucial for understanding its efficacy.

How can researchers determine if EMB2271 exhibits novel protective mechanisms beyond direct neutralization?

Investigation of novel protective mechanisms requires:

  • Fc-receptor dependent assays: Assess antibody-dependent cellular cytotoxicity (ADCC) and antibody-dependent cellular phagocytosis (ADCP)

  • Complement activation studies: Measure C1q binding and complement-dependent cytotoxicity

  • Structural rearrangement analysis: Evaluate if antibody binding induces conformational changes in the target

  • In vivo protection studies with Fc-modified variants: Compare wild-type antibody with variants lacking Fc-receptor binding

Marburg virus research revealed that protective antibodies can combat infection through multiple mechanisms beyond neutralization, including recruiting immune cells to kill infected cells and rearranging viral glycoproteins to enable access for other antibodies . Similar multifaceted protection mechanisms may apply to EMB2271.

What statistical approaches are most appropriate for analyzing EMB2271 Antibody binding data?

Statistical analysis should include:

  • Dose-response curve modeling: Four-parameter logistic regression for EC50 determination

  • Competitive binding analysis: Scatchard plots or non-linear regression for affinity constants

  • Kinetic data analysis: Global fitting of association/dissociation curves

  • Inter-assay normalization: Use of reference standards to enable cross-experimental comparisons

For immunogenicity assessments, statistical methods should account for the hierarchical nature of ADA testing, with appropriate analysis of screening, confirmatory, and neutralizing antibody results .

How do researchers accurately interpret EMB2271's impact on pharmacokinetics and pharmacodynamics?

PK/PD analysis for EMB2271 should consider:

  • ADA development influence: Anti-drug antibodies significantly alter drug concentration over time

  • Neutralizing vs. non-neutralizing ADA effects: NAbs typically cause more dramatic reductions in effective concentration

  • Binding site implications: ADA binding to active sites increases drug elimination more than binding to non-active regions

Analysis should include time-concentration curves with stratification based on ADA status, as demonstrated in studies showing that patients without anti-adalimumab antibodies maintained significantly higher adalimumab concentrations compared to those with antibody titers .

What emerging technologies might enhance EMB2271 Antibody characterization and development?

Several cutting-edge approaches show promise:

  • Cryo-electron microscopy: Enables visualization of antibody-antigen complexes in native states without crystallization

  • AI-powered epitope prediction: Facilitates rational design of improved antibody variants

  • High-throughput single-cell antibody discovery: Increases the diversity of candidate antibodies

  • Glycoengineering: Optimizes antibody effector functions through controlled glycosylation patterns

These technologies will likely accelerate the characterization process while providing deeper insights into structural determinants of antibody function.

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