Is C6 p.Ser442Pro (c.1324T>C) pathogenic?

C6 p.Ser442Pro (c.1324T>C) is classified Uncertain significance in C6 (ClinVar, Multiple submitters, 2 submitters; last evaluated 2023-09-26). AlphaMissense: ambiguous (0.4034); Very rare (popmax 0.00223%, eas); Associated with Inborn genetic diseases.

What condition is associated with C6 p.Ser442Pro (c.1324T>C)?

C6 p.Ser442Pro (c.1324T>C) is associated with Inborn genetic diseases (ClinVar).

How common is C6 p.Ser442Pro (c.1324T>C) in the general population?

C6 p.Ser442Pro (c.1324T>C) is very rare (popmax 0.00223%, eas) (gnomAD).

What do computational predictors say about C6 p.Ser442Pro (c.1324T>C)?

AlphaMissense predicts ambiguous (score 0.4034) — an in-silico prediction, not a clinical call.

C6 p.Ser442Pro

c.1324T>C · rs1286347275 · VCV2569782

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

AlphaMissense

ambiguous

0.4034 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00223%, eas)

Missense predictors

1/2 damaging

REVEL, SaProt · AlphaMissense no call

Conditions

Inborn genetic diseases

Computational evidence

Protein change
AlphaMissense	0.4034	ambiguous
REVEL	0.713	pathogenic-leaning
SaProt	LLR -6.63	tolerated
⇒ REVEL calls this damaging; SaProt does not; AlphaMissense makes no call.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 11	GERP 1.9, phastCons 1
Regional constraint	o/e 1.09	unconstrained · MANE · 60 kb · p 0.0034 · regional, not allelic
Overall
CADD	26.4	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 0.00223% East Asian · 1/44,846 alleles

Filtering AF 0.0005% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000366%

Overall 0.000806% 13/1,613,546 alleles · very rare

Ancestry group	Frequency	1 in
East Asiangrpmax	0.00223%	44,846
African / African-American	0.00134%	74,902
European (non-Finnish)	0.000932%	107,247

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: C6
Protein: p.Ser442Pro
Coding: c.1324T>C
MANE Select: NM_000065
dbSNP: rs1286347275
Type: single nucleotide variant
Location: chr5:41161827 (GRCh38)
Gene constraint: LOEUF 1.008 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 79.72 · 11 PDB
Residue 442: a β-strand; the macpf domain

Full C6 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Inborn genetic diseases — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

C6 p.Ala396Gly Uncertain significance ★★ ⚠ same condition
C6 p.Ala456Thr Uncertain significance ★★ ⚠ same condition
C6 p.Ala500Ser Uncertain significance ★★ ⚠ same condition
C6 p.Arg108His Uncertain significance ★★ ⚠ same condition
C6 p.Arg145His Uncertain significance ★★ ⚠ same condition
C6 p.Arg150His Uncertain significance ★★ ⚠ same condition
C6 p.Arg182Gln Uncertain significance ★★ ⚠ same condition
C6 p.Arg356Gln Uncertain significance ★★ ⚠ 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/c6-p-ser442pro (accessed [today's date]).

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