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A671=

SynonymousSilentLikely benignLumenal · predicted
Synonymous variant · codon at position 671 · C-terminal ER-lumenal (calcium binding, calmodulin, chaperone) · WFS1 (Wolframin)

Silent — Silent — no amino-acid change

Interactive 3D Structure

Interactive structure
rotate · zoom · variant + 5 Å neighbors
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AlphaFold wild-type wolframin · the variant site near residue 671 (C-terminal ER-lumenal (calcium binding, calmodulin, chaperone)) is highlighted.

Variant Assessment

Variant type
Synonymous
Schema
Silent
Silent — no amino-acid change
Domain
C-terminal ER-lumenal (calcium binding, calmodulin, chaperone)
Status
—

Therapeutic Implication · Silent

No amino-acid change (A671 is unchanged): the codon is altered but the protein sequence is identical to wild-type. No structural, stability or AlphaMissense effect applies. Synonymous variants are typically benign unless they affect splicing or regulatory elements; this one is not adjacent to an exon boundary.

Clinical Evidence

ClinVar classificationBenign/Likely benign
Review statuscriteria provided, multiple submitters, no conflicts
Associated conditionsWolfram syndrome 1
Population frequency (gnomAD v4)Low frequency · AF 0.034%
cDNA changec.2013G>A
Protein consequenceA671=
ClinVar variantNM_006005.3(WFS1):c.2013G>A (p.Ala671=)
ClinVar accessionVCV000166601
Last evaluated2025/11/15 00:00

Observed in the general population.

Classified for2★ documented assertion

ClinVar classifies this variant as Benign/Likely benign for Wolfram syndrome (classic) (autosomal recessive, OMIM 222300). Classic Wolfram syndrome is recessive: a single copy does not produce it, and this classification says nothing about a carrier's own risk.

  • Wolfram syndrome (classic)autosomal recessive · OMIM 222300submitted as: Wolfram syndrome 1
  • 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.

Review status: 2★ multiple submitters, no conflicts. ClinVar "conditions" is the union of all submissions; 0–1★ entries are submitted conditions, not documented phenotypes.

Population frequency
Global (all ancestries)
AF 0.034% · 548 / 1,613,178 alleles
Homozygotes
1
Highest-frequency population
Remaining individuals · AF 0.046%

Highest in Remaining individuals: AF 0.046% (29 of 62,496 alleles), in line with the global figure.

1 homozygote reported in gnomAD v4 (1 European (non-Finnish)). gnomAD excludes individuals with severe pediatric disease, so homozygotes in this dataset argue against a fully penetrant severe recessive phenotype and belong in the clinical picture. This is interpretive signal, not a classification.

Ancestry groupAllele freq.AC / ANHom.Carrier est.
Remaining individuals0.046%29 / 62,4960~1 in 1080
European (non-Finnish)0.040%471 / 1,180,0321~1 in 1250
African / African American0.037%28 / 75,0700~1 in 1340
East Asian0.025%11 / 44,8860~1 in 2040
Admixed American0.010%6 / 60,0280~1 in 5000
South Asian0.0022%2 / 91,0880~1 in 22770
Finnish · under-sampled0.0016%1 / 62,9960—

Source: gnomAD r4, retrieved 2026-08-21. Values are allele frequencies. The carrier estimate is derived from the allele frequency (Hardy-Weinberg, ~2·AF) and is an approximation, not a published figure — where a published carrier frequency exists it outranks this column and is cited on the card.

Therapeutic Strategy Handoff · prediction

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Full Variant Card

A671= — WFS1 Molecular Atlas Card

Variant type: Synonymous (silent) Codon: position 671 (Alanine, A) — amino acid unchanged Domain context: C-terminal ER-lumenal (calcium binding, calmodulin, chaperone)

Schema category: Silent — Silent — no amino-acid change

No amino-acid change (A671 is unchanged): the codon is altered but the protein sequence is identical to wild-type. No structural, stability or AlphaMissense effect applies. Synonymous variants are typically benign unless they affect splicing or regulatory elements; this one is not adjacent to an exon boundary.

Clinical evidence

Inheritance and scope

Benign/Likely benign — for Wolfram syndrome (classic) (autosomal recessive, OMIM 222300)

ClinVar classifies this variant as Benign/Likely benign for Wolfram syndrome (classic) (autosomal recessive, OMIM 222300). Classic Wolfram syndrome is recessive: a single copy does not produce it, and this classification says nothing about a carrier's own risk.

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.

  • Classification: Benign/Likely benign
  • Review status: criteria provided, multiple submitters, no conflicts
  • Associated conditions: Wolfram syndrome 1
  • cDNA change: c.2013G>A
  • ClinVar accession: VCV000166601
  • Last evaluated: 2025/11/15 00:00
  • Submissions: 1

Card generated by wolfram-atlas-batch (synonymous pipeline) on 2026-06-08T02:55:29.711196Z. WFS1: UniProt O76024, AlphaFold v6. Synonymous variants carry no protein-structural effect.