Is PLCD1 p.Ala222Val (c.665C>T) pathogenic?

PLCD1 p.Ala222Val (c.665C>T) is classified Uncertain significance in PLCD1 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-02-21). AlphaMissense: likely benign (0.1342); Ultra-rare (popmax 0.0134%, eas).

How common is PLCD1 p.Ala222Val (c.665C>T) in the general population?

PLCD1 p.Ala222Val (c.665C>T) is ultra-rare (popmax 0.0134%, eas) (gnomAD).

What do computational predictors say about PLCD1 p.Ala222Val (c.665C>T)?

AlphaMissense predicts likely benign (score 0.1342) — an in-silico prediction, not a clinical call.

PLCD1 p.Ala222Val

c.665C>T · VCV3889967

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.1342 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0134%, eas)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.1342	likely benign
REVEL	0.183	benign-leaning
SaProt	LLR -5.19	tolerated
⇒ AlphaMissense, REVEL and SaProt all call this tolerated.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 5.1	GERP -2.5, phastCons 1
Regional constraint	o/e 0.87	unconstrained · MANE · 22 kb · p 2.1e-05 · regional, not allelic
Overall
CADD	21.4	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean tolerated — 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 0.0134% East Asian · 6/44,884 alleles

Filtering AF 0.00579% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00394%

Overall 0.0013% 21/1,612,512 alleles · ultra-rare exomes 13/1,460,162 · genomes 8/152,350 · joint denominator

Ancestry group	Frequency	1 in
East Asiangrpmax	0.0134%	7,481
African / African-American	0.004%	25,007
Admixed American	0.00333%	30,018
South Asian	0.0033%	30,335
Remaining individualsnot grpmax-eligible	0.0016%	62,362
European (non-Finnish)	0.000508%	196,670

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: PLCD1
Protein: p.Ala222Val
Coding: c.665C>T
MANE Select: NM_006225
Type: single nucleotide variant
Location: chr3:38011339 (GRCh38)
Gene constraint: LOEUF 0.954 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 89.31

Full PLCD1 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

PLCD1 p.Ala222Ser Uncertain significance ★ ⚠ same residue
PLCD1 p.Ala222= Benign ★ same residue
PLCD1 p.Arg530Ter Pathogenic/Likely pathogenic ★★ same type
PLCD1 p.Arg138His Uncertain significance ★★ ⚠ same type
PLCD1 p.Arg476His Uncertain significance ★★ ⚠ same type
PLCD1 p.Arg60Gln Uncertain significance ★★ ⚠ same type
PLCD1 p.Pro417Arg Uncertain significance ★★ ⚠ same type
PLCD1 p.Ser650Ala Uncertain significance ★★ ⚠ same type

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/plcd1-p-ala222val (accessed [today's date]).

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