Is PC p.Pro749= (c.2247C>T) pathogenic?

PC p.Pro749= (c.2247C>T) is classified Likely benign in PC (ClinVar, Single submitter, 1 submitter; last evaluated 2022-07-22). Ultra-rare (popmax 0.0395%, sas); Associated with pyruvate carboxylase deficiency disease.

What condition is associated with PC p.Pro749= (c.2247C>T)?

PC p.Pro749= (c.2247C>T) is associated with pyruvate carboxylase deficiency disease (ClinVar).

How common is PC p.Pro749= (c.2247C>T) in the general population?

PC p.Pro749= (c.2247C>T) is ultra-rare (popmax 0.0395%, sas) (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.Pro749=

c.2247C>T · rs776576677 · VCV1581235

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

ultra-rare (popmax 0.0395%, sas)

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 -6.2	GERP -2.4
Overall
CADD	0.038	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0395% South Asian · 36/91,092 alleles

Filtering AF 0.0293% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0258%

Overall 0.00224% 36/1,609,984 alleles · ultra-rare exomes 34/1,457,736 · genomes 2/152,248 · joint denominator

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.Pro749=
Coding: c.2247C>T
MANE Select: NM_001040716
dbSNP: rs776576677
Type: single nucleotide variant
Location: chr11:66850900 (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 749: an α-helix; the pyruvate carboxyltransferase domain

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 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
PC p.Arg263Ter 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-pro749 (accessed [today's date]).

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