Is ASPM p.Ser650Cys (c.1949C>G) pathogenic?

ASPM p.Ser650Cys (c.1949C>G) is classified Uncertain significance in ASPM (ClinVar, Multiple submitters, 7 submitters; last evaluated 2025-06-18). AlphaMissense: likely benign (0.0746); Rare (popmax 0.107%, afr); Associated with Inborn genetic diseases.

What condition is associated with ASPM p.Ser650Cys (c.1949C>G)?

ASPM p.Ser650Cys (c.1949C>G) is associated with Inborn genetic diseases, microcephaly 5, primary, autosomal recessive (ClinVar).

How common is ASPM p.Ser650Cys (c.1949C>G) in the general population?

ASPM p.Ser650Cys (c.1949C>G) is rare (popmax 0.107%, afr) (gnomAD).

What do computational predictors say about ASPM p.Ser650Cys (c.1949C>G)?

AlphaMissense predicts likely benign (score 0.0746) — an in-silico prediction, not a clinical call.

ASPM p.Ser650Cys

c.1949C>G · rs112997359 · VCV157789

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 7 submitters

AlphaMissense

likely benign

0.0746 · ACMG-weighted

gnomAD v4.1

Rare

rare (popmax 0.107%, afr)

Missense predictors

0/2 damaging

AlphaMissense, REVEL

Conditions

Inborn genetic diseases

Computational evidence

Protein change
AlphaMissense	0.0746	likely benign
REVEL	0.019	moderately benign-leaning
⇒ AlphaMissense and REVEL both call this tolerated.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 1.5	GERP 0.2, phastCons 0.96
Regional constraint	o/e 1.01	unconstrained · MANE · 59 kb · p 0.59 · regional, not allelic
Overall
CADD	16.41	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

Grpmax group 0.107% African / African-American · 80/74,936 alleles

Filtering AF 0.0878% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0809%

Overall 0.00659% 106/1,609,238 alleles · rare

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.107%	937
Remaining individualsnot grpmax-eligible	0.0225%	4,452
Middle Eastern	0.0165%	6,044
South Asian	0.00769%	12,996
Admixed American	0.005%	20,001
European (non-Finnish)	8.51e-05%	1,175,684

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: ASPM
Protein: p.Ser650Cys
Coding: c.1949C>G
MANE Select: NM_018136
dbSNP: rs112997359
Type: single nucleotide variant
Location: chr1:197139844 (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

Inborn genetic diseases — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: microcephaly 5, primary, autosomal recessive

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-ser650cys (accessed [today's date]).

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