Is ASPM p.Trp1474Ter (c.4422G>A) pathogenic?

ASPM p.Trp1474Ter (c.4422G>A) is classified Pathogenic in ASPM (ClinVar, Multiple submitters, 3 submitters; last evaluated 2023-04-11). Absent from gnomAD v4.1; Associated with microcephaly 5, primary, autosomal recessive.

What condition is associated with ASPM p.Trp1474Ter (c.4422G>A)?

ASPM p.Trp1474Ter (c.4422G>A) is associated with microcephaly 5, primary, autosomal recessive (ClinVar).

How common is ASPM p.Trp1474Ter (c.4422G>A) in the general population?

ASPM p.Trp1474Ter (c.4422G>A) is absent from gnomAD v4.1 (gnomAD).

ASPM p.Trp1474Ter

c.4422G>A · rs147622433 · VCV234655

Pathogenic Multiple submitters

Classification

Pathogenic

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 3 submitters

Consequence

nonsense (stop-gain)

predicted LoF

gnomAD v4.1

Absent

absent from gnomAD v4.1

Conditions

microcephaly 5, primary, autosomal recessive

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Consequence	nonsense (stop-gain)	predicted loss-of-function
NMD	predicted	premature termination codon in exon 18 of 28
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 4.9	GERP 1.7, phastCons 1
Overall
CADD	37.0	PHRED · no single calibrated threshold — expert panels disagree

Predicted loss-of-function is descriptive, not an applied PVS1 code.

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: ASPM
Protein: p.Trp1474Ter
Coding: c.4422G>A
MANE Select: NM_018136
dbSNP: rs147622433
Type: single nucleotide variant
Location: chr1:197104829 (GRCh38)
Gene constraint: LOEUF 0.766 · pLI <0.01 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)

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

Disease context

microcephaly 5, primary, autosomal recessive — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

ASPM c.2419+2T>C Pathogenic/Likely pathogenic ★★ same condition
ASPM c.2488-1G>C Pathogenic/Likely pathogenic ★★ same condition
ASPM c.2936+5G>A Likely pathogenic ★★ same condition
ASPM c.3082+1G>C Pathogenic/Likely pathogenic ★★ same condition
ASPM c.9084+5G>A Likely pathogenic ★★ same condition
ASPM p.Arg1019Ter Pathogenic ★★ same condition
ASPM p.Arg1271Ter Pathogenic ★★ same condition
ASPM p.Arg1538Ter 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/aspm-p-trp1474ter (accessed [today's date]).

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