Is BLM p.Val1187Ala (c.3560T>C) pathogenic?

BLM p.Val1187Ala (c.3560T>C) is classified Uncertain significance in BLM (ClinVar, Multiple submitters, 2 submitters; last evaluated 2026-06-03). AlphaMissense: ambiguous (0.5535); Absent from gnomAD v4.1; Associated with hereditary neoplastic syndrome.

What condition is associated with BLM p.Val1187Ala (c.3560T>C)?

BLM p.Val1187Ala (c.3560T>C) is associated with hereditary neoplastic syndrome, Bloom syndrome (ClinVar).

How common is BLM p.Val1187Ala (c.3560T>C) in the general population?

BLM p.Val1187Ala (c.3560T>C) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about BLM p.Val1187Ala (c.3560T>C)?

AlphaMissense predicts ambiguous (score 0.5535) — an in-silico prediction, not a clinical call.

BLM p.Val1187Ala

c.3560T>C · rs2505549360 · VCV2738278

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

AlphaMissense

ambiguous

0.5535 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

2/2 damaging

REVEL, SaProt · AlphaMissense indeterminate

Conditions

hereditary neoplastic syndrome

Computational evidence

Protein change
AlphaMissense	0.5535	ambiguous
REVEL	0.694	pathogenic-leaning
SaProt	LLR -12.72	damaging
⇒ REVEL and SaProt both call this damaging; AlphaMissense is indeterminate.
Splicing
SpliceAI	<0.2	all four deltas below 0.2 · T>G here scores Δ0.55 · evaluated, not missing
Constraint at this position
Conservation	phyloP 7.9	GERP 2.6, phastCons 1
Regional constraint	o/e 0.92	unconstrained · MANE · 46 kb · p 0.035 · regional, not allelic
Overall
CADD	27.1	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.Val1187Ala
Coding: c.3560T>C
MANE Select: NM_000057
dbSNP: rs2505549360
Type: single nucleotide variant
Location: chr15:90804168 (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.Val1187Ile Uncertain significance ★ ⚠ same residue
BLM p.Val1187Leu Uncertain significance ★ ⚠ same residue
BLM p.Val1187= Likely benign ★ 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

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-val1187ala (accessed [today's date]).

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