Is NFKB2 p.Pro423Ser (c.1267C>T) pathogenic?

NFKB2 p.Pro423Ser (c.1267C>T) is classified Uncertain significance in NFKB2 (ClinVar, Single submitter, 1 submitter; last evaluated 2021-09-10). AlphaMissense: likely benign (0.0692); No allele count reported in gnomAD v4.1 (AN 1,519,794); Associated with immunodeficiency, common variable, 10.

What condition is associated with NFKB2 p.Pro423Ser (c.1267C>T)?

NFKB2 p.Pro423Ser (c.1267C>T) is associated with immunodeficiency, common variable, 10 (ClinVar).

How common is NFKB2 p.Pro423Ser (c.1267C>T) in the general population?

NFKB2 p.Pro423Ser (c.1267C>T) is no allele count reported in gnomAD v4.1 (AN 1,519,794) (gnomAD).

What do computational predictors say about NFKB2 p.Pro423Ser (c.1267C>T)?

AlphaMissense predicts likely benign (score 0.0692) — an in-silico prediction, not a clinical call.

NFKB2 p.Pro423Ser

c.1267C>T · rs756080515 · VCV1346389

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.0692 · ACMG-weighted

gnomAD v4.1

Not reported

no allele count reported in gnomAD v4.1 (AN 1,519,794)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

immunodeficiency, common variable, 10

Computational evidence

Protein change
AlphaMissense	0.0692	likely benign
REVEL	0.009	strongly benign-leaning
SaProt	LLR -6.82	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 -0.66	GERP -0.66
Regional constraint	o/e 0.99	unconstrained · MANE · 1,154 bp · p 0.84 · regional, not allelic
Overall
CADD	3.677	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

No allele count reported in gnomAD v4.1 (AN 1,519,794). This is missing data, not an absence: the variant may or may not be present in gnomAD. Rarity (ACMG PM2) and BA1/BS1 cannot be assessed for it.

Variant & gene context

Gene: NFKB2
Protein: p.Pro423Ser
Coding: c.1267C>T
MANE Select: NM_001322934
dbSNP: rs756080515
Type: single nucleotide variant
Location: chr10:102399437 (GRCh38)
Gene constraint: LOEUF 0.308 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 75.94 · 11 PDB
Residue 423: the 'disordered' region

Full NFKB2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

immunodeficiency, common variable, 10 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

NFKB2 p.Arg853Ter Pathogenic ★★ same condition
NFKB2 p.Asp865Gly Pathogenic/Likely pathogenic ★★ same condition
NFKB2 p.Gln871Ter Pathogenic ★★ same condition
NFKB2 c.243+3G>A Uncertain significance ★★ same condition
NFKB2 p.Ala121Thr Uncertain significance ★★ ⚠ same condition
NFKB2 p.Ala363Thr Uncertain significance ★★ ⚠ same condition
NFKB2 p.Ala475Val Uncertain significance ★★ ⚠ same condition
NFKB2 p.Ala572Thr 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/nfkb2-p-pro423ser (accessed [today's date]).

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