About GNA11
The GNA11 gene (G Protein Subunit Alpha 11) on chromosome 19p13 GNA11 Q209 mutations in the Ras-like domain occur in uveal melanoma, blue nevi, and are mutually exclusive with GNAQ mutations. Key targets include Exons 4–7 (Ras-like domain, helical domain) for comprehensive mutation screening.
Mutations: Q209L, Q209P, R183C | GC content: 58% | Target exons: Exons 4–7 (Ras-like domain, helical domain)
GNA11 Primer Design Challenges
- Q209 hotspot: Glutamine 209 mutations in exon 5 ablate GTPase activity causing constitutive Gq signaling
- Elevated GC (58%): The helical domain (exons 6–7) has high GC requiring careful primer Tm optimization
- Mutual exclusivity with GNAQ: Parallel testing for both GNA11 and GNAQ requires comparable primer efficiencies for multiplexing
Recommended Primer Design Parameters for GNA11
| Parameter | Standard Exons | GC-Rich Regions (≥58%) |
|---|---|---|
| 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 | Add 5–10% DMSO or betaine |
Recommended Primer Sequences for GNA11
| Target Region | Forward Primer (5′→3′) | Reverse Primer (5′→3′) | Amplicon |
|---|---|---|---|
| Exon 5 (Q209) | 5′-TGACCTGCCTCAACTGACTC-3′ | 5′-CAGAAGGCAGCTGGACATTG-3′ | 192 bp |
| Exon 4 (R183) | 5′-CTTGCAGTGGGCCTGTATGT-3′ | 5′-GACACAGTCCATGACCTCCC-3′ | 179 bp |
Key SNPs to Avoid in Primer Binding Sites
When designing GNA11 primers, avoid these clinically significant variants:
- rs121913746 (Q209L) — Exon 5 uveal melanoma activating mutation
- rs121913749 (R183C) — Exon 4 GTPase domain in blue nevi
Clinical Validation Required
All GNA11 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 GNA11 Primers Now
Pre-configured with GNA11-specific parameters. Use our primer design, Tm calculator, and GC content tools for optimal results.