unc-62 Antibody
Description
Overview of unc-62
unc-62 is a C. elegans homolog of the Homothorax gene, functioning as a transcriptional co-factor for Hox proteins. It regulates developmental processes and aging through tissue-specific isoforms:
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Isoform 7a: Expressed in the intestine and hypodermis, critical for lifespan modulation .
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Isoform 7b: Neuronal and hypodermal expression, involved in developmental patterning .
Key Mechanisms:
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Yolk Protein Regulation: Activates vitellogenin genes (vit-1 to vit-6), which accumulate to toxic levels in aging worms. RNAi knockdown reduces yolk protein expression by 4–100-fold, extending lifespan .
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Intestinal Health Maintenance: Suppresses age-related intestinal deterioration and aberrant neuronal gene expression (e.g., insulin-like ins-7) .
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Hypodermal Collagen Regulation: Maintains collagen gene expression; knockdown mimics age-related declines .
Lifespan Extension Data:
Intestinal Functions:
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Gene Expression: Knockdown increases somatic intestinal genes (e.g., opt-2) and delays age-related morphological decay .
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Pathway Interaction: Represses ins-7 expression in aged intestines, preventing DAF-16/FOXO inhibition .
Hypodermal Functions:
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Collagen Synthesis: Directly activates 41 collagen genes; knockdown reduces collagen levels, accelerating hypodermal aging .
Developmental vs. Adult Roles
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Developmental Stage: Essential for embryogenesis and neuronal differentiation .
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Adult Stage: Post-reproductive activity limits lifespan by promoting yolk synthesis and aberrant gene expression .
Key Methods:
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RNAi Knockdown: Tissue-specific RNAi strains (e.g., rde-1 rescue) identified intestine and hypodermis as critical for lifespan effects .
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ChIP-seq/qPCR: Validated UNC-62 binding to vit-2 and vit-6 promoters in adults .
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Transcriptomics: RNA-seq revealed 182 differentially expressed genes (67 upregulated, 115 downregulated) upon unc-62 knockdown .
Regulatory Motifs:
Therapeutic Implications
While no antibody targeting UNC-62 is described, its regulatory roles suggest potential strategies:
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Targeted Knockdown: Intestine-specific RNAi could decouple reproductive and somatic aging .
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DAF-16 Activation: unc-62 knockdown enhances DAF-16 activity, a longevity pathway conserved in mammals .
Limitations and Open Questions
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Tissue-specific isoform dynamics in aging.
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Evolutionary conservation of UNC-62’s dual roles in development and aging.
Product Specs
Constituents: 50% Glycerol, 0.01M PBS, pH 7.4
Target Background
** - Embryogenesis: UNC-62 collaborates with CEH-20 and CEH-40, performing overlapping roles during embryogenesis. **
** - Ectoderm Development: UNC-62 is crucial for postembryonic development of the ectoderm, including the Q, V, and P cell lineages. It ensures the invariant patterns of cell division, migration, fusion, and morphogenesis in these cell lineages. **
** - Cell Migration: UNC-62 participates in the mig-13 pathway, promoting anterior migration of neuroblasts in the Q lineage. **
** - Vulva Development: UNC-62 plays a key role in regulating multiple aspects of vulva development. **
** - Gene Regulation: UNC-62 associates with the homeobox protein CEH-60 to regulate gene expression. This includes repressing genes involved in innate immunity and activating genes involved in vitellogenesis. **
** - Lipid Homeostasis: UNC-62 contributes to lipid homeostasis by playing a role in the formation of the cuticle.
1. Different Meis/UNC-62 isoforms act through specific regions of the unc-55 promoter. UNC-62 isoforms differentially regulate the mRNA and protein expression of UNC-55. PMID: 27634571
2. These results illustrate how unc-62 regulation of intestinal gene expression is responsible for limiting lifespan during the normal aging process. PMID: 23468654
3. UNC-62 plays essential roles in regulating cell fate specification & differentiation in the mesodermal M lineage. UNC-62 functions together with CEH-20 in regulating these processes. PMID: 19643105
Q&A
FAQs for unc-62 Antibody Research
Advanced Research Questions
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How to resolve contradictions in UNC-62’s role as both a transcriptional activator and repressor?
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Perform ChIP-seq in stage-specific contexts (L2, L3, young adults) to map temporal binding patterns. In young adults, UNC-62 binds promoters of aging-related genes (e.g., vit-2, vit-6) but represses collagen genes via hypodermal pathways .
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Use motif analysis (e.g., RSAT/WebLogo) to identify co-factor binding sites. The ATTGACA motif is enriched in UNC-62 targets (p<10⁻¹⁵) .
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What methodologies identify UNC-62’s indirect targets in aging pathways?
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How to validate UNC-62’s interaction with daf-16 in longevity regulation?
