Is PC p.Phe1078= (c.3234T>C) pathogenic?

PC p.Phe1078= (c.3234T>C) is classified Benign/Likely benign in PC (ClinVar, Multiple submitters, 3 submitters; last evaluated 2026-01-27). Ultra-rare (popmax 0.033%, mid); Associated with pyruvate carboxylase deficiency disease.

What condition is associated with PC p.Phe1078= (c.3234T>C)?

PC p.Phe1078= (c.3234T>C) is associated with pyruvate carboxylase deficiency disease (ClinVar).

How common is PC p.Phe1078= (c.3234T>C) in the general population?

PC p.Phe1078= (c.3234T>C) is ultra-rare (popmax 0.033%, mid) (gnomAD).

How is Pyruvate carboxylase deficiency inherited?

Typically Autosomal recessive, Not applicable (Orphanet). A genetic counselor can assess individual risk for a family.

PC p.Phe1078=

c.3234T>C · rs531640812 · VCV1164364

Benign/Likely benign Multiple submitters

Classification

Benign/Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 3 submitters

gnomAD v4.1

Rare

ultra-rare (popmax 0.033%, mid)

Conditions

pyruvate carboxylase deficiency disease

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP -0.97	GERP -4
Overall
CADD	3.043	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.033% Middle Eastern · 2/6,062 alleles

Filtering AF 0.0228% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0196%

Overall 0.00291% 47/1,613,612 alleles · ultra-rare exomes 42/1,461,272 · genomes 5/152,340 · joint denominator

Ancestry group	Frequency	1 in
Middle Easterngrpmax	0.033%	3,031
South Asian	0.0318%	3,141
Remaining individualsnot grpmax-eligible	0.0096%	10,417
African / African-American	0.00266%	37,530
European (non-Finnish)	0.000678%	147,503

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: PC
Protein: p.Phe1078=
Coding: c.3234T>C
MANE Select: NM_001040716
dbSNP: rs531640812
Type: single nucleotide variant
Location: chr11:66849284 (GRCh38)
Gene constraint: LOEUF 0.539 · pLI 0.07 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
Structure: AlphaFold pLDDT 90.53 · 10 PDB
Residue 1078: a β-strand

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

Disease context

pyruvate carboxylase deficiency disease — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Pyruvate carboxylase deficiency (Orphanet):

Inheritance: Autosomal recessive, Not applicable
Onset: Infancy, Neonatal
Prevalence: 1-9 / 1 000 000 (Europe)

Similar variants

PC p.Phe1078del Uncertain significance same residue
PC c.1368+1G>A Likely pathogenic ★★ same condition
PC c.1826-1G>C Likely pathogenic ★★ same condition
PC c.1983-116C>T Likely pathogenic ★★ same condition
PC c.633+2T>C Likely pathogenic ★★ same condition
PC p.Ala610Thr Pathogenic ★★ same condition
PC p.Ala812Asp Likely pathogenic ★★ same condition
PC p.Arg18Ter Pathogenic/Likely 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/pc-p-phe1078 (accessed [today's date]).

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