Is PC p.Arg626Gln (c.1877G>A) pathogenic?

PC p.Arg626Gln (c.1877G>A) is classified Uncertain significance in PC (ClinVar, Single submitter, 1 submitter; last evaluated 2019-09-06). AlphaMissense: likely pathogenic (0.9578); Very rare (popmax 0.00329%, sas); Associated with pyruvate carboxylase deficiency disease.

What condition is associated with PC p.Arg626Gln (c.1877G>A)?

PC p.Arg626Gln (c.1877G>A) is associated with pyruvate carboxylase deficiency disease (ClinVar).

How common is PC p.Arg626Gln (c.1877G>A) in the general population?

PC p.Arg626Gln (c.1877G>A) is very rare (popmax 0.00329%, sas) (gnomAD).

How is Pyruvate carboxylase deficiency inherited?

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

What do computational predictors say about PC p.Arg626Gln (c.1877G>A)?

AlphaMissense predicts likely pathogenic (score 0.9578) — an in-silico prediction, not a clinical call.

PC p.Arg626Gln

c.1877G>A · rs780759271 · VCV930540

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely pathogenic

0.9578 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00329%, sas)

Missense predictors

3/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

pyruvate carboxylase deficiency disease

Computational evidence

Protein change
AlphaMissense	0.9578	likely pathogenic
REVEL	0.956	strongly pathogenic-leaning
SaProt	LLR -15.02	damaging
⇒ AlphaMissense, REVEL and SaProt all call this damaging.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 5.9	GERP 2, phastCons 1
Regional constraint	o/e 0.74	unconstrained · MANE · 23 kb · p 3.1e-25 · regional, not allelic
Overall
CADD	33.0	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean damaging — a triage signal, not a reclassification

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

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00329% South Asian · 3/91,092 alleles

Filtering AF 0.000875% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000443%

Overall 0.000682% 11/1,613,952 alleles · very rare

Ancestry group	Frequency	1 in
South Asiangrpmax	0.00329%	30,364
Admixed American	0.00167%	60,012
European (non-Finnish)	0.000593%	168,575

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.Arg626Gln
Coding: c.1877G>A
MANE Select: NM_001040716
dbSNP: rs780759271
Type: single nucleotide variant
Location: chr11:66851895 (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 626: 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 p.Arg626Trp Conflicting classifications of pathogenicity ★ ⚠ same residue
PC p.Arg626= Likely benign ★ 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

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-arg626gln (accessed [today's date]).

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