Is TSC2 p.Arg451Lys (c.1352G>A) pathogenic?

TSC2 p.Arg451Lys (c.1352G>A) is classified Conflicting classifications of pathogenicity in TSC2 (ClinVar, Conflicting submitters, 5 submitters; last evaluated 2026-01-04). AlphaMissense: likely benign (0.1029); Very rare (popmax 0.00401%, afr); Associated with tuberous sclerosis.

What condition is associated with TSC2 p.Arg451Lys (c.1352G>A)?

TSC2 p.Arg451Lys (c.1352G>A) is associated with tuberous sclerosis, tuberous sclerosis 2, hereditary neoplastic syndrome (ClinVar).

How common is TSC2 p.Arg451Lys (c.1352G>A) in the general population?

TSC2 p.Arg451Lys (c.1352G>A) is very rare (popmax 0.00401%, afr) (gnomAD).

How is Tuberous sclerosis complex inherited?

Typically Autosomal dominant (Orphanet). A genetic counselor can assess individual risk for a family.

What do computational predictors say about TSC2 p.Arg451Lys (c.1352G>A)?

AlphaMissense predicts likely benign (score 0.1029) — an in-silico prediction, not a clinical call.

TSC2 p.Arg451Lys

c.1352G>A · rs749780677 · VCV647792

Conflicting classifications of pathogenicity Conflicting submitters

Classification

Conflicting classifications of pathogenicity

ClinVar

Review

Conflicting submitters ★☆☆☆

ClinVar · 5 submitters

AlphaMissense

likely benign

0.1029 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00401%, afr)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

tuberous sclerosis

Computational evidence

Protein change
AlphaMissense	0.1029	likely benign
REVEL	0.225	benign-leaning
SaProt	LLR -5.95	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 7.4	GERP 0.81, phastCons 1
Regional constraint	o/e 1.00	unconstrained · MANE · 37 kb · p 0.88 · regional, not allelic
Overall
CADD	24.3	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 0.00401% African / African-American · 3/74,832 alleles

Filtering AF 0.00106% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000495%

Overall 0.000311% 5/1,607,676 alleles · very rare exomes 4/1,455,440 · genomes 1/152,236 · joint denominator

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.00401%	24,944
Admixed American	0.00168%	59,442
Remaining individualsnot grpmax-eligible	0.00161%	62,212

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: TSC2
Protein: p.Arg451Lys
Coding: c.1352G>A
MANE Select: NM_000548
dbSNP: rs749780677
Type: single nucleotide variant
Location: chr16:2062591 (GRCh38)
Gene constraint: LOEUF 0.203 · pLI 1.00 · ClinGen HI 3/3 (gnomAD)
Structure: AlphaFold pLDDT 68.81 · 2 PDB
Residue 451: an α-helix

Full TSC2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

tuberous sclerosis — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: tuberous sclerosis 2 hereditary neoplastic syndrome

For Tuberous sclerosis complex (Orphanet):

Inheritance: Autosomal dominant
Onset: All ages
Prevalence: 1-9 / 100 000 (Taiwan, Province of China)

Similar variants

TSC2 p.Arg451= Conflicting classifications of pathogenicity ★ same residue
TSC2 p.Arg451fs Pathogenic ★★ same residue
TSC2 c.1257+1G>A Pathogenic ★★ same condition
TSC2 c.1258-2A>G Pathogenic ★★ same condition
TSC2 c.1361+1G>A Pathogenic/Likely pathogenic ★★ same condition
TSC2 c.1361+1G>T Pathogenic/Likely pathogenic ★★ same condition
TSC2 c.1362-1G>A Pathogenic ★★ same condition
TSC2 c.138+2T>C 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/tsc2-p-arg451lys (accessed [today's date]).

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