S551F

Category 3/4 — Most DruggableUncertain significanceCytoplasmic · predictedSource card

Serine → Phenylalanine at position 551 · Transmembrane helix 8 · WFS1 (Wolframin)

Interactive 3D Structure

Wild-type reference

Wild-type S551 — hydrogen bond to L548

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DynaMut2 mutant · S551F

Mutant F551 — hydrogen bond contact to L548 lost

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Bond changes · DynaMut2 interaction analysis

0 lost5 gained4 preserved

Interaction type	Wild-type partner	Mutant partner	Status
Hydrogen bond	I547	I547	Preserved
Hydrogen bond	L548	L548	Preserved
Polar contact	—	S430	Gained
Polar contact	I547	I547	Preserved
Polar contact	L548	L548	Preserved
Van der Waals	—	C429	Gained
Van der Waals	—	S430	Gained
Van der Waals	—	L548	Gained
Hydrophobic	—	C429	Gained

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

DynaMut2 ΔΔG

-0.87kcal/mol

Destabilising — mild

AlphaMissense

0.962

likely pathogenic

AlphaFold pLDDT

model confidence

Schema

Cat 3/4

Category 3/4 — Most Druggable

Clinical Evidence

ClinVar classificationUncertain significance

Review statuscriteria provided, single submitter

Associated conditions—

Population frequency (gnomAD v4)Absent from gnomAD v4

cDNA changec.1652C>T

ClinVar accessionVCV002110404

Last evaluated2025/02/03 00:00

Not observed in ~730k individuals — consistent with a rare allele (ACMG PM2_supporting).

Full Variant Card

WFS1 Wolframin — S551F Variant Card

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

Serine → Phenylalanine at position 551. Transmembrane helix 8. ClinVar Uncertain significance, AlphaMissense 0.962, DynaMut2 ΔΔG -0.87 kcal/mol (destabilising).

Identity

Field	Value
Variant	S551F (p.Serine551Phenylalanine)
DNA change	c.1652C>T
Gene · Protein	WFS1 · Wolframin (890 aa)
UniProt	O76024 · WFS1_HUMAN
ClinVar accession	VCV002110404
Amino acid change	Serine (S) → Phenylalanine (F)

Structural Context

Field	Value
AlphaFold model	AF-O76024-F1, v6
pLDDT at residue 551	85.94 — well-folded
Domain	Transmembrane helix 8
Position context	Inside Transmembrane helix 8 · position 551 is bilayer-embedded
IDR flag	No — pLDDT above 50 threshold

UniProt features at this position:

(none catalogued)

Position 551 sits in a transmembrane helix (Transmembrane helix 8). 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 small polar (serine — hydroxyl); the mutant is large aromatic hydrophobic (phenylalanine). The chemistry shift implies altered local packing, hydrogen-bonding, and/or electrostatics at this site.

Computational Predictions

AlphaMissense

Field	Value
am_pathogenicity	0.9621
am_class	likely pathogenic
Interpretation	Likely pathogenic (threshold 0.564)

DynaMut2

Field	Value
ΔΔG (kcal/mol)	-0.87 (Destabilising)
Job ID	178092097867
Result URL	https://biosig.lab.uq.edu.au/dynamut2/results_prediction/178092097867

Clinical Evidence

Field	Value
Classification	Uncertain significance
Review status	criteria provided, single submitter
Last evaluated	2025/02/03 00:00
Inheritance	Inheritance pattern not specified in ClinVar entry; WFS1 has both AD and AR presentations.
WFS1 variant landscape	S551F is 1 of ~326 pathogenic-spectrum variants in WFS1 (out of 2,243 catalogued in ClinVar)

(no conditions catalogued)

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|=0.87 < 2 kcal/mol (fold intact) + AlphaMissense 0.962 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|=0.87 kcal/mol). The pathogenic signal is real — AlphaMissense places it at 0.962. 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
S551F_molstar_viewer.html — interactive 3D viewer (auto-highlights position 551 with ball-and-stick + neighbors within 5Å)
S551F_variant_card.md — this card (source of truth)
S551F_variant_card.html — styled printable card
S551F_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)
S551F_wildtype_interactions.pse / S551F_mutant_interactions.pse — PyMOL sessions

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

Therapeutic Strategy Handoff · prediction

Feed this card to Wolfram Intelligence

Download the S551F 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.

Download S551F PDF card ↓Strategies are AI-generated predictions, not validated therapeutics.