Is TAT p.Ser75Phe (c.224C>T) pathogenic?

TAT p.Ser75Phe (c.224C>T) is classified Uncertain significance in TAT (ClinVar, Single submitter, 1 submitter; last evaluated 2021-08-27). AlphaMissense: ambiguous (0.3638); Ultra-rare (popmax 0.0567%, amr); Associated with tyrosinemia type II.

What condition is associated with TAT p.Ser75Phe (c.224C>T)?

TAT p.Ser75Phe (c.224C>T) is associated with tyrosinemia type II (ClinVar).

How common is TAT p.Ser75Phe (c.224C>T) in the general population?

TAT p.Ser75Phe (c.224C>T) is ultra-rare (popmax 0.0567%, amr) (gnomAD).

How is Tyrosinemia type 2 inherited?

Typically Autosomal recessive (Orphanet). A genetic counselor can assess individual risk for a family.

What do computational predictors say about TAT p.Ser75Phe (c.224C>T)?

AlphaMissense predicts ambiguous (score 0.3638) — an in-silico prediction, not a clinical call.

TAT p.Ser75Phe

c.224C>T · rs773076331 · VCV1056879

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

ambiguous

0.3638 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0567%, amr)

Conditions

tyrosinemia type II

Computational evidence

Protein change
AlphaMissense	0.3638	ambiguous
REVEL	0.554	indeterminate
SaProt	LLR -10.02	damaging
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 9.8	GERP 1.9, phastCons 1
Regional constraint	o/e 0.92	unconstrained · MANE · 8,268 bp · p 0.051 · regional, not allelic
Overall
CADD	27.1	PHRED · no single calibrated threshold — expert panels disagree

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

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0567% Admixed American · 34/59,950 alleles

Filtering AF 0.0417% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0365%

Overall 0.00211% 34/1,613,874 alleles · ultra-rare

Rarity supports pathogenicity (ACMG PM2); frequency above a disease-specific BA1/BS1 threshold argues against it. A variant frequent in one ancestry group can be near-absent in others, so a single global figure can mislead.

Variant & gene context

Gene: TAT
Protein: p.Ser75Phe
Coding: c.224C>T
MANE Select: NM_000353
dbSNP: rs773076331
Type: single nucleotide variant
Location: chr16:71576192 (GRCh38)
Gene constraint: LOEUF 0.844 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 91.93 · 1 PDB

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

Disease context

tyrosinemia type II — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Tyrosinemia type 2 (Orphanet):

Inheritance: Autosomal recessive
Onset: Adolescent, Childhood, Infancy, Neonatal

Similar variants

TAT p.Ser75= Likely benign ★ same residue
TAT c.707-2A>G Pathogenic/Likely pathogenic ★★ same condition
TAT c.912+1G>A Likely pathogenic ★★ same condition
TAT p.Arg119Trp Pathogenic/Likely pathogenic ★★ same condition
TAT p.Arg297Ter Pathogenic/Likely pathogenic ★★ same condition
TAT p.Arg306Ter Pathogenic/Likely pathogenic ★★ same condition
TAT p.Arg417Gln Pathogenic/Likely pathogenic ★★ same condition
TAT p.Arg417Ter Pathogenic ★★ 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/tat-p-ser75phe (accessed [today's date]).

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