Is BLM p.Glu140Gly (c.419A>G) pathogenic?

BLM p.Glu140Gly (c.419A>G) is classified Benign in BLM (ClinVar, Multiple submitters, 13 submitters; last evaluated 2026-02-04). AlphaMissense: likely benign (0.0983); Low-frequency (popmax 3.25%, afr); Associated with hereditary neoplastic syndrome.

What condition is associated with BLM p.Glu140Gly (c.419A>G)?

BLM p.Glu140Gly (c.419A>G) is associated with hereditary neoplastic syndrome, Bloom syndrome (ClinVar).

How common is BLM p.Glu140Gly (c.419A>G) in the general population?

BLM p.Glu140Gly (c.419A>G) is low-frequency (popmax 3.25%, afr) (gnomAD).

What do computational predictors say about BLM p.Glu140Gly (c.419A>G)?

AlphaMissense predicts likely benign (score 0.0983) — an in-silico prediction, not a clinical call.

BLM p.Glu140Gly

c.419A>G · rs35886055 · VCV133708

Benign Multiple submitters

Classification

Benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 13 submitters

AlphaMissense

likely benign

0.0983 · ACMG-weighted

gnomAD v4.1

Rare

low-frequency (popmax 3.25%, afr)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

hereditary neoplastic syndrome

Computational evidence

Protein change
AlphaMissense	0.0983	likely benign
REVEL	0.071	moderately benign-leaning
SaProt	LLR -6.50	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 9.3	GERP 2.7, phastCons 1
Regional constraint	o/e 0.96	unconstrained · MANE · 16 kb · p 0.23 · regional, not allelic
Overall
CADD	19.88	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 3.25% African / African-American · 2,442/75,040 alleles

Filtering AF 3.15% ClinGen BA1/BS1 input FAF95, joint · FAF99 3.1%

Overall 0.169% 2,734/1,614,162 alleles · low-frequency

Ancestry group	Frequency	1 in
African / African-Americangrpmax	3.25%	31
Admixed American	0.177%	566
Remaining individualsnot grpmax-eligible	0.17%	590
Middle Eastern	0.0165%	6,062
European (non-Finnish)	0.0061%	16,389
South Asian	0.00549%	18,217
Finnishnot grpmax-eligible	0.00312%	32,012

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: BLM
Protein: p.Glu140Gly
Coding: c.419A>G
MANE Select: NM_000057
dbSNP: rs35886055
Type: single nucleotide variant
Location: chr15:90749687 (GRCh38)
Gene constraint: LOEUF 0.847 · pLI <0.01 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
Structure: AlphaFold pLDDT 61.10 · 16 PDB

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

Disease context

hereditary neoplastic syndrome — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: Bloom syndrome

Similar variants

BLM p.Glu140= Likely benign ★★ same residue
BLM p.Glu140Ter Likely pathogenic ★ same residue
BLM c.1087+1G>A Likely pathogenic ★★ same condition
BLM c.1088-1G>A Likely pathogenic ★★ same condition
BLM c.1220+2T>C Likely pathogenic ★★ same condition
BLM c.1220+2T>G Likely pathogenic ★★ same condition
BLM c.1882+2T>C Likely pathogenic ★★ same condition
BLM c.2074+1G>T Likely 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/blm-p-glu140gly (accessed [today's date]).

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