F340L

Category 3/4 — Most DruggableUncertain significanceTransmembrane · predictedSource card

Phenylalanine → Leucine at position 340 · Cytoplasmic loop 1 · WFS1 (Wolframin)

Interactive 3D Structure

Wild-type reference

Wild-type F340 — hydrogen bond to F344

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DynaMut2 mutant · F340L

Mutant L340 — aromatic / π contact to F344 lost

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Bond changes · DynaMut2 interaction analysis

1 lost2 gained11 preserved

Interaction type	Wild-type partner	Mutant partner	Status
Hydrogen bond	T337	T337	Preserved
Hydrogen bond	F343	F343	Preserved
Hydrogen bond	F344	F344	Preserved
Polar contact	—	N335	Gained
Polar contact	T337	T337	Preserved
Polar contact	I338	I338	Preserved
Polar contact	F343	F343	Preserved
Polar contact	F344	F344	Preserved
Aromatic / π	F344	—	Lost
Van der Waals	T337	T337	Preserved
Van der Waals	I338	I338	Preserved
Van der Waals	—	F344	Gained
Hydrophobic	L336	L336	Preserved
Hydrophobic	F344	F344	Preserved

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

0.32kcal/mol

Stabilising — mild

AlphaMissense

0.803

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)Ultra-rare · AF 0.00014%

cDNA changec.1020C>G

ClinVar accessionVCV000229633

Last evaluated2015/01/29 00:00

Observed at very low frequency in gnomAD.

Full Variant Card

WFS1 Wolframin — F340L Variant Card

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

Phenylalanine → Leucine at position 340. Cytoplasmic loop 1. ClinVar Uncertain significance, AlphaMissense 0.803, DynaMut2 ΔΔG +0.32 kcal/mol (stabilising).

Identity

Field	Value
Variant	F340L (p.Phenylalanine340Leucine)
DNA change	c.1020C>G
Gene · Protein	WFS1 · Wolframin (890 aa)
UniProt	O76024 · WFS1_HUMAN
ClinVar accession	VCV000229633
Amino acid change	Phenylalanine (F) → Leucine (L)

Structural Context

Field	Value
AlphaFold model	AF-O76024-F1, v6
pLDDT at residue 340	69.94 — confident
Domain	Cytoplasmic loop 1
Position context	Loop region · position 340 sits between transmembrane segments, solvent-accessible
IDR flag	No — pLDDT above 50 threshold

UniProt features at this position:

(none catalogued)

Position 340 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 large aromatic hydrophobic (phenylalanine); the mutant is medium hydrophobic (leucine — branched). The chemistry shift implies altered local packing, hydrogen-bonding, and/or electrostatics at this site.

Computational Predictions

AlphaMissense

Field	Value
am_pathogenicity	0.8032
am_class	likely pathogenic
Interpretation	Likely pathogenic (threshold 0.564)

DynaMut2

Field	Value
ΔΔG (kcal/mol)	0.32 (Stabilising)
Job ID	178092116099
Result URL	https://biosig.lab.uq.edu.au/dynamut2/results_prediction/178092116099

Clinical Evidence

Field	Value
Classification	Uncertain significance
Review status	criteria provided, single submitter
Last evaluated	2015/01/29 00:00
Inheritance	Inheritance pattern not specified in ClinVar entry; WFS1 has both AD and AR presentations.
WFS1 variant landscape	F340L 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|=0.32 < 2 kcal/mol (fold intact) + AlphaMissense 0.803 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|=0.32 kcal/mol). The pathogenic signal is real — AlphaMissense places it at 0.803. 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
F340L_molstar_viewer.html — interactive 3D viewer (auto-highlights position 340 with ball-and-stick + neighbors within 5Å)
F340L_variant_card.md — this card (source of truth)
F340L_variant_card.html — styled printable card
F340L_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)
F340L_wildtype_interactions.pse / F340L_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 F340L 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 F340L PDF card ↓Strategies are AI-generated predictions, not validated therapeutics.