Is BICD2 p.Arg141Leu (c.422G>T) pathogenic?

BICD2 p.Arg141Leu (c.422G>T) is classified Uncertain significance in BICD2 (ClinVar, Multiple submitters, 2 submitters; last evaluated 2025-03-28). AlphaMissense: ambiguous (0.4112); Absent from gnomAD v4.1; Associated with autosomal dominant childhood-onset proximal spinal muscular atrophy with contractures.

How common is BICD2 p.Arg141Leu (c.422G>T) in the general population?

BICD2 p.Arg141Leu (c.422G>T) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about BICD2 p.Arg141Leu (c.422G>T)?

AlphaMissense predicts ambiguous (score 0.4112) — an in-silico prediction, not a clinical call.

BICD2 p.Arg141Leu

Q: What condition is associated with BICD2 p.Arg141Leu (c.422G>T)?

BICD2 p.Arg141Leu (c.422G>T) is associated with autosomal dominant childhood-onset proximal spinal muscular atrophy with contractures (ClinVar).

Q: How is Autosomal dominant childhood-onset proximal spinal muscular atrophy inherited?

Typically Autosomal dominant (Orphanet). A genetic counselor can assess individual risk for a family.

c.422G>T · rs754377478 · VCV1925133

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

AlphaMissense

ambiguous

0.4112 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Conditions

autosomal dominant childhood-onset proximal spinal muscular atrophy with contractures

Computational evidence

Protein change
AlphaMissense	0.4112	ambiguous
REVEL	0.396	indeterminate
SaProt	LLR -9.65	tolerated
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 7.6	GERP 2.7, phastCons 1
Regional constraint	o/e 0.79	unconstrained · MANE · 42 kb · p 0.00095 · regional, not allelic
Overall
CADD	25.3	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

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: BICD2
Protein: p.Arg141Leu
Coding: c.422G>T
MANE Select: NM_001003800
dbSNP: rs754377478
Type: single nucleotide variant
Location: chr9:92729055 (GRCh38)
Gene constraint: LOEUF 0.507 · pLI 0.95 (gnomAD)
Structure: AlphaFold pLDDT 78.89 · 2 PDB
Residue 141: the 'interacts with dynll1, dync1h1, dync1i2, dctn1 and dctn2' region

Full BICD2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

autosomal dominant childhood-onset proximal spinal muscular atrophy with contractures — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Autosomal dominant childhood-onset proximal spinal muscular atrophy (Orphanet):

Inheritance: Autosomal dominant
Onset: Adolescent, Antenatal, Childhood, Infancy, Neonatal
Prevalence: <1 / 1 000 000 (Worldwide)

Similar variants

BICD2 p.Arg141His Uncertain significance ★★ ⚠ same residue
BICD2 p.Arg141Cys Uncertain significance ★ ⚠ same residue
BICD2 p.Arg694Cys Pathogenic/Likely pathogenic ★★ same condition
BICD2 p.Lys734Glu Likely pathogenic ★★ same condition
BICD2 p.Ser107Leu Pathogenic ★★ ⚠ same condition
BICD2 p.Thr703Met Pathogenic/Likely pathogenic ★★ same condition
BICD2 p.Tyr556Ser Likely pathogenic ★★ ⚠ same condition
BICD2 c.1062+5G>A 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/bicd2-p-arg141leu (accessed [today's date]).

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