Is LRPPRC p.Pro406Ser (c.1216C>T) pathogenic?

LRPPRC p.Pro406Ser (c.1216C>T) is classified Uncertain significance in LRPPRC (ClinVar, Single submitter, 1 submitter; last evaluated 2019-03-18). AlphaMissense: likely benign (0.2643); Absent from gnomAD v4.1; Associated with congenital lactic acidosis, Saguenay-Lac-Saint-Jean type.

What condition is associated with LRPPRC p.Pro406Ser (c.1216C>T)?

LRPPRC p.Pro406Ser (c.1216C>T) is associated with congenital lactic acidosis, Saguenay-Lac-Saint-Jean type (ClinVar).

How common is LRPPRC p.Pro406Ser (c.1216C>T) in the general population?

LRPPRC p.Pro406Ser (c.1216C>T) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about LRPPRC p.Pro406Ser (c.1216C>T)?

AlphaMissense predicts likely benign (score 0.2643) — an in-silico prediction, not a clinical call.

LRPPRC p.Pro406Ser

Q: How is Congenital lactic acidosis, Saguenay-Lac-Saint-Jean type inherited?

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

c.1216C>T · rs374749283 · VCV2433524

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.2643 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

1/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

congenital lactic acidosis, Saguenay-Lac-Saint-Jean type

Computational evidence

Protein change
AlphaMissense	0.2643	likely benign
REVEL	0.087	moderately benign-leaning
SaProt	LLR -10.18	damaging
⇒ SaProt calls this damaging; AlphaMissense and REVEL do not.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 2.5	GERP -1.9, phastCons 1
Regional constraint	o/e 1.21	unconstrained · MANE · 107 kb · p 2.9e-18 · regional, not allelic
Overall
CADD	16.97	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

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: LRPPRC
Protein: p.Pro406Ser
Coding: c.1216C>T
MANE Select: NM_133259
dbSNP: rs374749283
Type: single nucleotide variant
Location: chr2:43973840 (GRCh38)
Gene constraint: LOEUF 0.808 · pLI <0.01 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
Structure: AlphaFold pLDDT 77.35 · 2 PDB
Residue 406: an α-helix

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

Disease context

congenital lactic acidosis, Saguenay-Lac-Saint-Jean type — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Congenital lactic acidosis, Saguenay-Lac-Saint-Jean type (Orphanet):

Inheritance: Autosomal recessive
Onset: Infancy, Neonatal

Similar variants

LRPPRC p.Pro406fs Likely pathogenic ★ same residue
LRPPRC p.Pro406Leu Uncertain significance ★ ⚠ same residue
LRPPRC c.1369+1G>C Likely pathogenic ★★ same condition
LRPPRC c.1582+7A>G Likely pathogenic ★★ same condition
LRPPRC c.1677+1G>A Likely pathogenic ★★ same condition
LRPPRC c.1677+1G>T Likely pathogenic ★★ same condition
LRPPRC c.1678-1G>A Likely pathogenic ★★ same condition
LRPPRC c.1735+2T>C 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/lrpprc-p-pro406ser (accessed [today's date]).

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