Is BLM p.Glu377Asp (c.1131G>C) pathogenic?

BLM p.Glu377Asp (c.1131G>C) is classified Conflicting classifications of pathogenicity in BLM (ClinVar, Conflicting submitters, 2 submitters; last evaluated 2025-02-14). AlphaMissense: likely benign (0.0822); Absent from gnomAD v4.1; Associated with hereditary neoplastic syndrome.

What condition is associated with BLM p.Glu377Asp (c.1131G>C)?

BLM p.Glu377Asp (c.1131G>C) is associated with hereditary neoplastic syndrome, Bloom syndrome (ClinVar).

How common is BLM p.Glu377Asp (c.1131G>C) in the general population?

BLM p.Glu377Asp (c.1131G>C) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about BLM p.Glu377Asp (c.1131G>C)?

AlphaMissense predicts likely benign (score 0.0822) — an in-silico prediction, not a clinical call.

BLM p.Glu377Asp

c.1131G>C · rs764842587 · VCV1022490

Conflicting classifications of pathogenicity Conflicting submitters

Classification

Conflicting classifications of pathogenicity

ClinVar

Review

Conflicting submitters ★☆☆☆

ClinVar · 2 submitters

AlphaMissense

likely benign

0.0822 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

hereditary neoplastic syndrome

Computational evidence

Protein change
AlphaMissense	0.0822	likely benign
REVEL	0.034	moderately benign-leaning
SaProt	LLR -6.21	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 -0.17	GERP -5.6, phastCons 0.001
Regional constraint	o/e 0.96	unconstrained · MANE · 16 kb · p 0.23 · regional, not allelic
Overall
CADD	0.031	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: BLM
Protein: p.Glu377Asp
Coding: c.1131G>C
MANE Select: NM_000057
dbSNP: rs764842587
Type: single nucleotide variant
Location: chr15:90760190 (GRCh38)
Gene constraint: LOEUF 0.847 · pLI <0.01 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
Structure: AlphaFold pLDDT 61.10 · 16 PDB
Residue 377: an α-helix; the 'necessary for interaction with spidr' region; the 'necessary for dimerization and homooligomerization' region

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.Glu377= Likely benign ★★ same residue
BLM p.Glu377fs 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-glu377asp (accessed [today's date]).

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