WFS1 Wolframin — R522M Variant Card

Molecular Atlas Pilot · RareResearch.AI · Generated by wolfram-variant-card skill

Arginine → Methionine at position 522. Cytoplasmic loop 4. ClinVar Uncertain significance, AlphaMissense 0.800, DynaMut2 ΔΔG -0.26 kcal/mol (destabilising).

Identity

Structural Context

UniProt features at this position:

(none catalogued)

Position 522 sits in a connecting loop between transmembrane helices. Loop residues are typically solvent-exposed and often contribute to interhelical contacts or serve as recognition sites for binding partners. The wild-type residue is positively charged (arginine — guanidinium, strong H-bond donor); the mutant is hydrophobic sulfur (methionine). The chemistry shift implies altered local packing, hydrogen-bonding, and/or electrostatics at this site.

Computational Predictions

AlphaMissense

DynaMut2

Clinical Evidence

Inheritance and scope

Uncertain significance — for WFS1-related spectrum (unresolved mode) (dominant or recessive)

ClinVar classifies this variant as Uncertain significance for WFS1-related spectrum (unresolved mode) (dominant or recessive). ClinVar records this under a WFS1-spectrum label that spans both disease families — recessive Wolfram syndrome (biallelic) and the dominant WFS1-related disorders. The label does not resolve which applies, and it is not a severity statement.

Phenotype scope is interpretation of submitted records. The computed values on this card (AlphaMissense, DynaMut2 ΔΔG, pLDDT) are measurements of the model, not of a patient. Presentation cannot be generalised from neighbouring variants: one nucleotide over can present very differently. Structural similarity supports a mechanistic hypothesis, never a phenotype claim.

• WFS1-related disorder
• Inborn genetic diseases

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|=0.26 < 2 kcal/mol (fold intact) + AlphaMissense 0.800 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|=0.26 kcal/mol). The pathogenic signal is real — AlphaMissense places it at 0.800. 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 structure
• R522M_molstar_viewer.html — interactive 3D viewer (auto-highlights position 522 with ball-and-stick + neighbors within 5Å)
• R522M_variant_card.md — this card (source of truth)
• R522M_variant_card.html — styled printable card
• R522M_dynamut2_summary.html — clean offline DynaMut2 result card
• dynamut2_result.json — structured result data
• dynamut2_result_page.html — local snapshot of the Biosig result page (asset URLs absolutized)
• R522M_wildtype_interactions.pse / R522M_mutant_interactions.pse — PyMOL sessions

Generated by wolfram-variant-card skill · RareResearch.AI Molecular Atlas Every assumption documented. Every score sourced.