Is WAS p.Pro181Ser (c.541C>T) pathogenic?

WAS p.Pro181Ser (c.541C>T) is classified Uncertain significance in WAS (ClinVar, Single submitter, 1 submitter; last evaluated 2024-09-19). AlphaMissense: likely benign (0.0688); Absent from gnomAD v4.1; Associated with X-linked severe congenital neutropenia.

What condition is associated with WAS p.Pro181Ser (c.541C>T)?

WAS p.Pro181Ser (c.541C>T) is associated with X-linked severe congenital neutropenia, Wiskott-Aldrich syndrome, thrombocytopenia 1 (ClinVar).

How common is WAS p.Pro181Ser (c.541C>T) in the general population?

WAS p.Pro181Ser (c.541C>T) is absent from gnomAD v4.1 (gnomAD).

How is X-linked severe congenital neutropenia inherited?

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

What do computational predictors say about WAS p.Pro181Ser (c.541C>T)?

AlphaMissense predicts likely benign (score 0.0688) — an in-silico prediction, not a clinical call.

WAS p.Pro181Ser

c.541C>T · VCV3761741

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.0688 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

0/2 damaging

AlphaMissense, SaProt · REVEL no call

Conditions

X-linked severe congenital neutropenia

Computational evidence

Protein change
AlphaMissense	0.0688	likely benign
REVEL	0.489	indeterminate
SaProt	LLR -6.78	tolerated
⇒ AlphaMissense and SaProt both call this tolerated; REVEL makes no call.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 7.6	GERP 1.3, phastCons 1
Regional constraint	o/e 0.56	unconstrained · MANE · 2,597 bp · p 6e-07 · regional, not allelic
Overall
CADD	21.7	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

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: WAS
Protein: p.Pro181Ser
Coding: c.541C>T
MANE Select: NM_000377
Type: single nucleotide variant
Location: chrX:48686116 (GRCh38)
Structure: AlphaFold pLDDT 70.84 · 7 PDB
Residue 181: the 'disordered' region

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

Disease context

X-linked severe congenital neutropenia — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: Wiskott-Aldrich syndrome thrombocytopenia 1

For X-linked severe congenital neutropenia (Orphanet):

Inheritance: X-linked recessive
Onset: Infancy, Neonatal

Similar variants

WAS p.Pro181Leu Uncertain significance ★ ⚠ same residue
WAS c.1339-2A>G Pathogenic/Likely pathogenic ★★ same condition
WAS c.1453+2T>C Pathogenic ★★ same condition
WAS c.273+1G>A Pathogenic ★★ same condition
WAS c.360+1G>A Pathogenic ★★ same condition
WAS c.559+5G>A Pathogenic ★★ same condition
WAS c.777+1G>A Pathogenic ★★ same condition
WAS c.778-6G>A 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/was-p-pro181ser (accessed [today's date]).

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