Is TSC2 p.Pro744Ala (c.2230C>G) pathogenic?

TSC2 p.Pro744Ala (c.2230C>G) is classified Uncertain significance in TSC2 (ClinVar, Multiple submitters, 3 submitters; last evaluated 2024-08-19). AlphaMissense: likely benign (0.0868); Absent from gnomAD v4.1; Associated with tuberous sclerosis.

What condition is associated with TSC2 p.Pro744Ala (c.2230C>G)?

TSC2 p.Pro744Ala (c.2230C>G) is associated with tuberous sclerosis, tuberous sclerosis 2, hereditary neoplastic syndrome (ClinVar).

How common is TSC2 p.Pro744Ala (c.2230C>G) in the general population?

TSC2 p.Pro744Ala (c.2230C>G) is absent from gnomAD v4.1 (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.Pro744Ala (c.2230C>G)?

AlphaMissense predicts likely benign (score 0.0868) — an in-silico prediction, not a clinical call.

TSC2 p.Pro744Ala

c.2230C>G · rs1596350020 · VCV664186

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 3 submitters

AlphaMissense

likely benign

0.0868 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

0/2 damaging

AlphaMissense, SaProt · REVEL no call

Conditions

tuberous sclerosis

Computational evidence

Protein change
AlphaMissense	0.0868	likely benign
REVEL	0.434	indeterminate
SaProt	LLR -6.26	tolerated
⇒ AlphaMissense and SaProt both call this tolerated; REVEL makes no call.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 6	GERP 2.1, phastCons 1
Regional constraint	o/e 1.00	unconstrained · MANE · 37 kb · p 0.88 · regional, not allelic
Overall
CADD	22.9	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.

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: TSC2
Protein: p.Pro744Ala
Coding: c.2230C>G
MANE Select: NM_000548
dbSNP: rs1596350020
Type: single nucleotide variant
Location: chr16:2072858 (GRCh38)
Gene constraint: LOEUF 0.203 · pLI 1.00 · ClinGen HI 3/3 (gnomAD)
Structure: AlphaFold pLDDT 68.81 · 2 PDB

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.Pro744Arg Uncertain significance ★★ ⚠ same residue
TSC2 p.Pro744= Benign/Likely benign ★★ same residue
TSC2 p.Pro744Ser Uncertain significance ★ ⚠ same residue
TSC2 p.Pro744Leu Benign ★ same residue
TSC2 p.Pro744fs 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

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-pro744ala (accessed [today's date]).

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