PNSL5 Antibody

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Description

Potential Linguistic or Terminological Errors

The term "PNSL5" may represent a typographical error or misinterpretation of established antibody nomenclature. Closest matches include:

Similar TermsContextual RelevanceSource Reference
IgLON5Autoantibody linked to neurodegenerative disorders with tau pathology
PS5Peptidomimetic compound studied for antioxidant properties
Ser5Phosphorylation site on RNA Polymerase II (e.g., RNAPII pS5 antibodies)

A. IgLON5 Antibody

  • Function: Associated with autoimmune encephalopathy and sleep disorders.

  • Clinical Impact: 80% of patients improved with immunotherapy; untreated cases showed high mortality.

  • Key Data:

    • CSF analysis: Noninflammatory in all tested patients .

    • Neuropathology: Tauopathy in hypothalamus/brainstem .

B. RNAPII Phospho-Ser5 Antibodies

  • Role: Marks transcriptionally engaged RNA Polymerase II.

  • Applications:

    • ChIP/ChIP-Seq (5–10 µg per assay) .

    • Western blot detection in irradiated cancer cells (e.g., nasopharyngeal carcinoma) .

Antibody Engineering and Validation

Relevant methodologies for antibody characterization (applicable to hypothetical PNSL5 studies):

ParameterExample from Literature
Specificity TestingsiRNA knockdown confirmed target specificity (Parkin/OCT4 antibodies) .
Neutralization AssaysBroad-spectrum SARS-CoV-2 antibodies (e.g., PW5-535) showed IC<sub>50</sub> values of 0.001–0.006 µg/mL against XBB.1 .
Structural AnalysisCryo-EM resolved epitope binding modes (e.g., ACE2 competition) .

Research Gaps and Recommendations

  • Database Discrepancies: Cross-checked repositories (UniProt, RCSB PDB) show no entries for "PNSL5."

  • Hypothetical Context: If "PNSL5" refers to an uncharacterized epitope, standardized workflows for discovery include:

    1. Phage display/yeast library screening.

    2. High-throughput epitope binning.

    3. Functional validation in disease models (e.g., autoimmune or oncogenic assays).

Product Specs

Buffer
Preservative: 0.03% ProClin 300
Components: 50% Glycerol, 0.01M PBS, pH 7.4
Form
Liquid
Lead Time
14-16 weeks (Made-to-order)
Synonyms
PNSL5 antibody; CYP20-2 antibody; At5g13120 antibody; T19L5_80 antibody; Photosynthetic NDH subunit of lumenal location 5 antibody; chloroplastic antibody; Cyclophilin of 20 kDa 2 antibody; Peptidyl-prolyl cis-trans isomerase CYP20-2 antibody; PPIase CYP20-2 antibody; EC 5.2.1.8 antibody; Rotamase CYP20-2 antibody; Thylakoid lumen PPIase of 20 kDa antibody; TLP20 antibody
Target Names
PNSL5
Uniprot No.

Target Background

Function
NADH dehydrogenase (NDH) shuttles electrons from NAD(P)H:plastoquinone, via FMN and iron-sulfur (Fe-S) centers, to quinones within the photosynthetic and potentially chloroplast respiratory chains. In this species, plastoquinone is considered the enzyme's immediate electron acceptor. The redox reaction is coupled to proton translocation, conserving redox energy as a proton gradient (Probable). Peptidyl-prolyl isomerases (PPIases) accelerate protein folding by catalyzing the cis-trans isomerization of proline imidic peptide bonds in oligopeptides. This protein, along with FKBP13, accounts for all PPIase activity observed in the thylakoid lumen. It modulates the conformation of BZR1, a regulator of flowering.
Gene References Into Functions
  • Studies indicate that Arabidopsis thaliana cytochrome P450 20-2 (AtCYP20-2) is associated with a thylakoid protein complex, the NAD(P)H dehydrogenase (NDH) complex. PMID: 19549520
  • Double mutant plants with disrupted AtCYP20-2 and AtFKBP13 genes exhibited no phenotypic differences compared to wild-type plants; however, peptidyl-prolyl isomerase activity was virtually eliminated from the mutant thylakoid lumen. PMID: 19717822
Database Links

KEGG: ath:AT5G13120

STRING: 3702.AT5G13120.1

UniGene: At.10074

Protein Families
Cyclophilin-type PPIase family
Subcellular Location
Plastid, chloroplast thylakoid membrane; Peripheral membrane protein; Lumenal side.
Tissue Specificity
Ubiquitous.

Q&A

The following FAQs address key research considerations for studying antibodies targeting the NS5 protein (commonly associated with flaviviruses like dengue and West Nile virus), based on current academic literature. The term "PNSL5" does not appear in published research; this guidance assumes a focus on NS5 antibodies given contextual relevance to the provided sources.

Advanced Research Questions

What experimental strategies resolve contradictions between NS5 and structural protein immunoassay results?

  • Longitudinal Serum Analysis: Track antibody levels over time. NS5 antibodies may decline post-infection, while structural protein antibodies persist (e.g., WNV E-protein signals remain detectable >1 year post-infection) .

  • Functional Correlation: Pair serological data with enzymatic assays (e.g., RdRp activity inhibition) to confirm biological relevance of antibodies .

How are conformational epitopes on NS5 characterized structurally?

  • Hybrid Approaches:

    • Phage Display Libraries: Screen against NS5 domains to isolate Fabs targeting specific regions (e.g., DENV3 MTase aa19-30) .

    • X-ray Crystallography/NMR: Resolve antibody-NS5 complexes to identify critical binding residues.

Data Table: Key NS5 Epitopes and Assay Performance

Epitope RegionAssay TypeCross-ReactivityClinical UtilitySource
MTase α-helix (5M1)Peptide ELISAPan-flavivirusDistinguishes DENV/WNV infections
RdRp priming loop (5R3)Phage DisplaySerotype-specificGuides therapeutic antibody development
Full-length NS5MIAModerateDetects recent WNV infections

Methodological Notes

  • Antibody Engineering: Human Fab phage libraries enable isolation of high-affinity antibodies without animal immunization .

  • Assay Validation: Use RNA replication inhibition assays (e.g., RdRp activity) to confirm functional antibody efficacy .

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