Is SLMAP p.Ala640Val (c.1919C>T) pathogenic?

SLMAP p.Ala640Val (c.1919C>T) is classified Uncertain significance in SLMAP (ClinVar, Single submitter, 1 submitter; last evaluated 2021-03-14). AlphaMissense: likely benign (0.3212); Very rare (popmax 0.00267%, afr); Associated with Brugada syndrome.

What condition is associated with SLMAP p.Ala640Val (c.1919C>T)?

SLMAP p.Ala640Val (c.1919C>T) is associated with Brugada syndrome (ClinVar).

How common is SLMAP p.Ala640Val (c.1919C>T) in the general population?

SLMAP p.Ala640Val (c.1919C>T) is very rare (popmax 0.00267%, afr) (gnomAD).

How is Brugada syndrome inherited?

Typically Autosomal dominant, Not applicable (Orphanet). A genetic counselor can assess individual risk for a family.

What do computational predictors say about SLMAP p.Ala640Val (c.1919C>T)?

AlphaMissense predicts likely benign (score 0.3212) — an in-silico prediction, not a clinical call.

SLMAP p.Ala640Val

c.1919C>T · rs762174645 · VCV1418370

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.3212 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00267%, afr)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

Brugada syndrome

Computational evidence

Protein change
AlphaMissense	0.3212	likely benign
REVEL	0.154	moderately benign-leaning
SaProt	LLR -7.39	tolerated
⇒ AlphaMissense, REVEL and SaProt all call this tolerated.
Splicing
SpliceAI	<0.2	all four deltas below 0.2 · C>G here scores Δ0.37 · evaluated, not missing
Constraint at this position
Conservation	phyloP 7.7	GERP 2.2, phastCons 1
Regional constraint	o/e 0.85	unconstrained · MANE · 94 kb · p 9.6e-06 · regional, not allelic
Overall
CADD	29.3	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.

⚠ Isoform check: AlphaMissense numbered on a different transcript (AM A623V vs ClinVar A640V) — verify the residue.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00267% African / African-American · 2/74,904 alleles

Filtering AF 0.000763% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000605%

Overall 0.00105% 17/1,613,864 alleles · very rare exomes 15/1,461,746 · genomes 2/152,118 · joint denominator

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.00267%	37,452
European (non-Finnish)	0.00127%	78,663

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: SLMAP
Protein: p.Ala640Val
Coding: c.1919C>T
MANE Select: NM_001377540
dbSNP: rs762174645
Type: single nucleotide variant
Location: chr3:57912600 (GRCh38)
Gene constraint: LOEUF 0.531 · pLI 0.86 (gnomAD)
Structure: AlphaFold pLDDT 77.74 · 3 PDB

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

Disease context

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

For Brugada syndrome (Orphanet):

Inheritance: Autosomal dominant, Not applicable
Onset: Adult, Childhood
Prevalence: 1-5 / 10 000 (Europe)

Similar variants

SLMAP p.Ala640= Likely benign ★★ same residue
SLMAP c.*38C>T Uncertain significance ★★ ⚠ same condition
SLMAP c.*55G>A Uncertain significance ★★ ⚠ same condition
SLMAP c.*70G>A Uncertain significance ★★ ⚠ same condition
SLMAP p.Ala365Asp Uncertain significance ★★ ⚠ same condition
SLMAP p.Ala506Ser Uncertain significance ★★ ⚠ same condition
SLMAP p.Ala597Val Uncertain significance ★★ ⚠ same condition
SLMAP p.Arg136Gln Uncertain significance ★★ ⚠ 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/slmap-p-ala640val (accessed [today's date]).

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