Is NBAS p.Arg941Ser (c.2821C>A) pathogenic?

NBAS p.Arg941Ser (c.2821C>A) is classified Uncertain significance in NBAS (ClinVar, Multiple submitters, 2 submitters; last evaluated 2023-09-25). AlphaMissense: likely pathogenic (0.9186); Very rare (popmax 0.00212%, nfe); Associated with Inborn genetic diseases.

What condition is associated with NBAS p.Arg941Ser (c.2821C>A)?

NBAS p.Arg941Ser (c.2821C>A) is associated with Inborn genetic diseases (ClinVar).

How common is NBAS p.Arg941Ser (c.2821C>A) in the general population?

NBAS p.Arg941Ser (c.2821C>A) is very rare (popmax 0.00212%, nfe) (gnomAD).

What do computational predictors say about NBAS p.Arg941Ser (c.2821C>A)?

AlphaMissense predicts likely pathogenic (score 0.9186) — an in-silico prediction, not a clinical call.

NBAS p.Arg941Ser

c.2821C>A · rs374303460 · VCV1368292

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

AlphaMissense

likely pathogenic

0.9186 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00212%, nfe)

Missense predictors

1/2 damaging

AlphaMissense, SaProt · REVEL no call

Conditions

Inborn genetic diseases

Computational evidence

Protein change
AlphaMissense	0.9186	likely pathogenic · top 5% in NBAS
REVEL	0.478	indeterminate
SaProt	LLR -8.50	tolerated
⇒ AlphaMissense calls this damaging; SaProt does not; REVEL makes no call.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 12	GERP 2, phastCons 1
Regional constraint	o/e 1.03	unconstrained · MANE · 394 kb · p 0.09 · regional, not allelic
Overall
CADD	28.4	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 0.00212% European (non-Finnish) · 25/1,180,022 alleles

Filtering AF 0.00145% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00123%

Overall 0.00161% 26/1,613,992 alleles · very rare exomes 24/1,461,856 · genomes 2/152,136 · joint denominator

Ancestry group	Frequency	1 in
European (non-Finnish)grpmax	0.00212%	47,201
Admixed American	0.00167%	59,996

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: NBAS
Protein: p.Arg941Ser
Coding: c.2821C>A
MANE Select: NM_015909
dbSNP: rs374303460
Type: single nucleotide variant
Location: chr2:15415662 (GRCh38)
Gene constraint: LOEUF 0.761 · pLI <0.01 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
Structure: AlphaFold pLDDT 74.42
Residue 941: a UniProt-annotated variant site (in ilfs2; uncertain significance); a UniProt-annotated variant site (found in a patient with a multisystem disease involving liver, eye, immune system, connective tissue and bone; uncertain significance); a UniProt-annotated variant site (found in a patient with a multisystem disease involving liver, eye, immune system, connective tissue and bone; uncertain significance; reduced protein expression levels in fibroblasts); the 'interaction with use1' region

Full NBAS 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

NBAS p.Arg941His Uncertain significance ★★ same residue
NBAS p.Arg941Cys Uncertain significance ★ same residue
NBAS p.Arg941= Likely benign ★ same residue
NBAS p.Ala1568Val Uncertain significance ★★ ⚠ same condition
NBAS p.Ala1645Val Uncertain significance ★★ ⚠ same condition
NBAS p.Ala1795Val Uncertain significance ★★ ⚠ same condition
NBAS p.Ala1941Gly Uncertain significance ★★ ⚠ same condition
NBAS p.Ala195Thr 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/nbas-p-arg941ser (accessed [today's date]).

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