About DDR2
The DDR2 gene (Discoidin Domain Receptor 2) on chromosome 1q23 Mutations in the discoidin and kinase domains of DDR2 occur in ~4% of squamous cell lung cancers and are candidate targets for dasatinib. Key targets include Exons 13–18 (kinase domain) for comprehensive mutation screening.
Mutations: S131R, L239R, G505S, I638F | GC content: 50% | Target exons: Exons 13–18 (kinase domain)
DDR2 Primer Design Challenges
- Moderate GC (50%): Balanced content allows standard PCR conditions but requires careful Tm matching across mutation hotspots
- Discoidin domain interference: The extracellular discoidin domain binds collagen, and mutations affect cell culture amplification efficiency
- Somatic mutation distribution: Mutations spanning both discoidin (exons 2–8) and kinase (exons 13–18) domains require dual-region tiling
Recommended Primer Design Parameters for DDR2
| Parameter | Standard Exons | Optimized Regions |
|---|---|---|
| Primer length | 20–22 nt | 22–25 nt |
| GC content | 45–55% | 50–60% |
| Tm | 58–62°C | 60–65°C |
| Amplicon size | 150–300 bp | 180–350 bp |
| Annealing temp | 58–60°C | 60–64°C (touchdown) |
| PCR additive | Standard | Optional 3–5% DMSO for problematic regions |
Recommended Primer Sequences for DDR2
| Target Region | Forward Primer (5′→3′) | Reverse Primer (5′→3′) | Amplicon |
|---|---|---|---|
| Exon 13 (kinase) | 5′-GGAGCAGACCCACATGAGAA-3′ | 5′-ACTGCCCTCACCTGGTACAT-3′ | 177 bp |
| Exon 16 (activation loop) | 5′-TGCTCCCTCTCCGGATACTA-3′ | 5′-CAGCTGCACTCTGAAGTCCA-3′ | 198 bp |
Key SNPs to Avoid in Primer Binding Sites
When designing DDR2 primers, avoid these clinically significant variants:
- rs137855902 (S131R) — Exon 4 discoidin domain mutation
- rs3731851 (G505S) — Exon 13 kinase domain mutation in SCC
Clinical Validation Required
All DDR2 primers designed with VigyanLLM are for research use only. Clinical diagnostic applications require additional wet-lab validation, Sanger sequencing confirmation, and regulatory approval before patient use.
Design DDR2 Primers Now
Pre-configured with DDR2-specific parameters. Use our primer design, Tm calculator, and GC content tools for optimal results.