Is TMPRSS6 p.Arg103Ser (c.307C>A) pathogenic?

TMPRSS6 p.Arg103Ser (c.307C>A) is classified Uncertain significance in TMPRSS6 (ClinVar, Single submitter, 1 submitter; last evaluated 2023-05-31). AlphaMissense: ambiguous (0.3451); Absent from gnomAD v4.1; Associated with Inborn genetic diseases.

What condition is associated with TMPRSS6 p.Arg103Ser (c.307C>A)?

TMPRSS6 p.Arg103Ser (c.307C>A) is associated with Inborn genetic diseases (ClinVar).

How common is TMPRSS6 p.Arg103Ser (c.307C>A) in the general population?

TMPRSS6 p.Arg103Ser (c.307C>A) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about TMPRSS6 p.Arg103Ser (c.307C>A)?

AlphaMissense predicts ambiguous (score 0.3451) — an in-silico prediction, not a clinical call.

TMPRSS6 p.Arg103Ser

c.307C>A · rs113803353 · VCV2553807

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

ambiguous

0.3451 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

0/2 damaging

REVEL, SaProt · AlphaMissense no call

Conditions

Inborn genetic diseases

Computational evidence

Protein change
AlphaMissense	0.3451	ambiguous
REVEL	0.23	benign-leaning
SaProt	LLR -7.99	tolerated
⇒ REVEL and SaProt both call this tolerated; AlphaMissense makes no call.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 7.4	GERP 1.5, phastCons 1
Regional constraint	o/e 0.95	unconstrained · MANE · 37 kb · p 0.097 · regional, not allelic
Overall
CADD	22.8	PHRED · no single calibrated threshold — expert panels disagree

AlphaMissense carries the ACMG weight for missense; REVEL and SaProt are independent agreement signals.

⚠ Isoform check: AlphaMissense numbered on a different transcript (AM R112S vs ClinVar R103S) — verify the residue.

Population frequency

gnomAD v4.1 · exomes + genomes

Absent from gnomAD v4.1. Not observed in any sequenced alleles — a rarity signal (ACMG PM2-supporting), not evidence of pathogenicity on its own.

Variant & gene context

Gene: TMPRSS6
Protein: p.Arg103Ser
Coding: c.307C>A
MANE Select: NM_001374504
dbSNP: rs113803353
Type: single nucleotide variant
Location: chr22:37098445 (GRCh38)
Gene constraint: LOEUF 0.821 · pLI <0.01 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
Structure: AlphaFold pLDDT 84.69 · 1 PDB
Residue 103: the sea domain; an α-helix

Full TMPRSS6 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Inborn genetic diseases — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

TMPRSS6 p.Arg103His Uncertain significance ★ ⚠ same residue
TMPRSS6 p.Arg103Cys Conflicting classifications of pathogenicity ★ ⚠ same residue
TMPRSS6 p.Arg103Leu Uncertain significance ★ ⚠ same residue
TMPRSS6 p.Ala164Thr Uncertain significance ★★ ⚠ same condition
TMPRSS6 p.Ala700Val Uncertain significance ★★ ⚠ same condition
TMPRSS6 p.Arg121His Uncertain significance ★★ ⚠ same condition
TMPRSS6 p.Arg251Gln Uncertain significance ★★ ⚠ same condition
TMPRSS6 p.Arg545Trp Uncertain significance ★★ ⚠ same condition

Built on 18 open, versioned datasets — ClinVar, gnomAD, AlphaMissense, REVEL, ClinGen & more — plus Sugi Variant's own cross-source analysis. Source data 2026-01–2026-10, ClinVar 2026-10. Full sources & versions →

Cite Sugi Variant

Gür T. Sugi Variant: A Deterministic Per-Variant Germline Reference from a Knowledge Graph for Humans and AI Agents. 2026. doi:10.5281/zenodo.21509445. This variant: https://sugi.bio/variant/tmprss6-p-arg103ser (accessed [today's date]).

Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown