Genomic coordinate (human 12:55,723,535 CD63).
Cytoband (human 12q13.2 CD63).
Intraband %= 72.0% CD63
ClinVar = 179 CD63 variants reported.
OMIM’ genes @ 12q13.2 = 22 genes.
Hyperbolic Umbilic Chromosome-12 is 1,200 genes.
Chromosome-12 Cytobands: WG2B2GC_CBG5B2G6 (12/29)
Here I 🎁 present: “Melanoma Type-1 Antigen“, Victor McKusick, Mendelian Inheritance in Man’, 1966. (CD63)
INTRODUCTION.
Here we illustrates the dual, context-dependent roles of the protein CD63 in melanoma progression.
🧬 Dual Roles of CD63
- Intracellular Tumor-Cell CD63: Acts as a tumor suppressor.
- Extracellular CD63-Positive Exosomes: Promotes tumor growth and metastasis.
📊 Control Parameters (Axes)
- Axis a: Tumor-Cell CD63 Expression (Intracellular).
- Axis b: Exosomal CD63 Secretion (Extracellular).
- Axis x: Melanoma State / Metastatic Potential.
⚠️ Cusp Catastrophe Interpretation
- Stable State 1: High tumor-cell CD63 prevents invasion.
- Stable State 2: High exosomal CD63 drives metastasis.
- Transition (Cusp Region): Involves endosomal sorting and membrane trafficking.
- Abrupt Shift: Small trafficking changes cause sudden metastatic spikes.
📝 Key Take-Home Message
- Loss of intracellular CD63 promotes cell invasion.
- Extracellular CD63-positive exosomes remodel the microenvironment.
- Circulating CD63-positive exosomes serve as early biomarkers.
- CD63 is encoded on Chromosome 12q13.2.
