F350C
Category 3/4 — Most DruggableUncertain significanceTransmembrane · predictedSource cardInteractive 3D Structure
Bond changes · DynaMut2 interaction analysis
| Interaction type | Wild-type partner | Mutant partner | Status |
|---|---|---|---|
| Hydrogen bond | P346 | P346 | Preserved |
| Hydrogen bond | L347 | L347 | Preserved |
| Hydrogen bond | S353 | S353 | Preserved |
| Hydrogen bond | F354 | F354 | Preserved |
| Hydrogen bond | — | S418 | Gained |
| Polar contact | P346 | P346 | Preserved |
| Polar contact | L347 | L347 | Preserved |
| Polar contact | V348 | V348 | Preserved |
| Polar contact | L352 | — | Lost |
| Polar contact | S353 | S353 | Preserved |
| Polar contact | F354 | F354 | Preserved |
| Polar contact | S418 | S418 | Preserved |
| Polar contact | — | A422 | Gained |
| Aromatic / π | F419 | — | Lost |
| Van der Waals | — | L347 | Gained |
| Van der Waals | V348 | V348 | Preserved |
| Van der Waals | F354 | F354 | Preserved |
| Van der Waals | S418 | S418 | Preserved |
| Hydrophobic | V415 | — | Lost |
| Hydrophobic | F419 | — | Lost |
| Hydrophobic | I427 | — | Lost |
| Hydrophobic | L432 | — | Lost |
Lost / gained / preserved interatomic contacts at the variant residue, from the DynaMut2 (Arpeggio) interaction analysis of the wild-type and energy-minimized mutant structures.
Computational Predictions
Clinical Evidence
Observed at very low frequency in gnomAD.
Full Variant Card
WFS1 Wolframin — F350C Variant Card
Molecular Atlas Pilot · RareResearch.AI · Generated by wolfram-variant-card skill
Phenylalanine → Cysteine at position 350. Transmembrane helix 2. ClinVar Uncertain significance, AlphaMissense 0.860, DynaMut2 ΔΔG -1.26 kcal/mol (destabilising).
Identity
| Field | Value |
|---|---|
| Variant | F350C (p.Phenylalanine350Cysteine) |
| DNA change | c.1049T>G |
| Gene · Protein | WFS1 · Wolframin (890 aa) |
| UniProt | O76024 · WFS1_HUMAN |
| ClinVar accession | VCV003590682 |
| Amino acid change | Phenylalanine (F) → Cysteine (C) |
Structural Context
| Field | Value |
|---|---|
| AlphaFold model | AF-O76024-F1, v6 |
| pLDDT at residue 350 | 93.38 — well-folded |
| Domain | Transmembrane helix 2 |
| Position context | Inside Transmembrane helix 2 · position 350 is bilayer-embedded |
| IDR flag | No — pLDDT above 50 threshold |
UniProt features at this position:
(none catalogued)
Position 350 sits in a transmembrane helix (Transmembrane helix 2). Wolframin has eleven such helices anchoring it in the ER membrane; substitutions inside the bilayer-embedded segments can disrupt helix packing, lipid contacts, and the overall ER topology of the protein. The wild-type residue is large aromatic hydrophobic (phenylalanine); the mutant is thiol (cysteine — disulfide-capable, free -SH). The chemistry shift implies altered local packing, hydrogen-bonding, and/or electrostatics at this site.
Computational Predictions
AlphaMissense
| Field | Value |
|---|---|
| am_pathogenicity | 0.8599 |
| am_class | likely pathogenic |
| Interpretation | Likely pathogenic (threshold 0.564) |
DynaMut2
| Field | Value |
|---|---|
| ΔΔG (kcal/mol) | -1.26 (Destabilising) |
| Job ID | 178092112066 |
| Result URL | https://biosig.lab.uq.edu.au/dynamut2/results_prediction/178092112066 |
Clinical Evidence
| Field | Value |
|---|---|
| Classification | Uncertain significance |
| Review status | criteria provided, single submitter |
| Last evaluated | 2024/01/24 00:00 |
| Inheritance | Autosomal dominant pattern indicated by associated DFNA6/14/38 (WFS1 hearing loss 6). |
| WFS1 variant landscape | F350C is 1 of ~326 pathogenic-spectrum variants in WFS1 (out of 2,243 catalogued in ClinVar) |
- Autosomal dominant nonsyndromic hearing loss 6
- Cataract 41
- Wolfram syndrome 1
- Wolfram-like syndrome
- Type 2 diabetes mellitus
Research Path Decision Tree
ΔΔG < 2 + binding site affected → CATEGORY 3 — docking experiments
ΔΔG 2–4 → CATEGORY 2 — pharmacological chaperones
ΔΔG > 4 → CATEGORY 1 — gene therapy
pLDDT < 50 → CATEGORY 5 — IDR, experimental only
Stable fold + functional site hit → CATEGORY 4 — site-specific docking
Final Schema Categorization
Category 3/4 — Most Druggable
<strong>Category 3/4 — Most Druggable</strong><br/><br/>|ΔΔG|=1.26 < 2 kcal/mol (fold intact) + AlphaMissense 0.860 confirms functional impact. Specific local contacts disrupted — priority for docking and pharmacological chaperone screening.
Why this card matters. Wolframin's fold survives this substitution (|ΔΔG|=1.26 kcal/mol). The pathogenic signal is real — AlphaMissense places it at 0.860. Protein still folds, but a specific local site is broken. Pharmacological chaperones and small-molecule binders are the rational therapeutic vector.
Files in this folder
AF-O76024-F1-model_v6.pdb— AlphaFold structureF350C_molstar_viewer.html— interactive 3D viewer (auto-highlights position 350 with ball-and-stick + neighbors within 5Å)F350C_variant_card.md— this card (source of truth)F350C_variant_card.html— styled printable cardF350C_dynamut2_summary.html— clean offline DynaMut2 result carddynamut2_result.json— structured result datadynamut2_result_page.html— local snapshot of the Biosig result page (asset URLs absolutized)F350C_wildtype_interactions.pse/F350C_mutant_interactions.pse— PyMOL sessions
Generated by wolfram-variant-card skill · RareResearch.AI Molecular Atlas Every assumption documented. Every score sourced.
Feed this card to Wolfram Intelligence
Download the F350C PDF below and upload it to Wolfram Intelligence to generate therapeutic-strategy proposals — guanidinium mimetics, sigma-1 agonist docking, NAC thiol-capping. NAC is already on the bench-testing list.