Is TSC2 p.Ser581Arg (c.1743C>G) pathogenic?

TSC2 p.Ser581Arg (c.1743C>G) is classified Uncertain significance in TSC2 (ClinVar, Multiple submitters, 2 submitters; last evaluated 2025-11-21). AlphaMissense: likely pathogenic (0.8603); Absent from gnomAD v4.1; Associated with hereditary neoplastic syndrome.

What condition is associated with TSC2 p.Ser581Arg (c.1743C>G)?

TSC2 p.Ser581Arg (c.1743C>G) is associated with hereditary neoplastic syndrome (ClinVar).

How common is TSC2 p.Ser581Arg (c.1743C>G) in the general population?

TSC2 p.Ser581Arg (c.1743C>G) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about TSC2 p.Ser581Arg (c.1743C>G)?

AlphaMissense predicts likely pathogenic (score 0.8603) — an in-silico prediction, not a clinical call.

TSC2 p.Ser581Arg

c.1743C>G · rs775195398 · VCV1779235

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

AlphaMissense

likely pathogenic

0.8603 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

1/2 damaging

AlphaMissense, SaProt · REVEL no call

Conditions

hereditary neoplastic syndrome

Computational evidence

Protein change
AlphaMissense	0.8603	likely pathogenic
REVEL	0.546	indeterminate
SaProt	LLR -6.53	tolerated
⇒ AlphaMissense calls this damaging; SaProt does not; REVEL makes no call.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 1.3	GERP 1.1, phastCons 1
Regional constraint	o/e 1.00	unconstrained · MANE · 37 kb · p 0.88 · regional, not allelic
Overall
CADD	20.3	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

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.Ser581Arg
Coding: c.1743C>G
MANE Select: NM_000548
dbSNP: rs775195398
Type: single nucleotide variant
Location: chr16:2070482 (GRCh38)
Gene constraint: LOEUF 0.203 · pLI 1.00 · ClinGen HI 3/3 (gnomAD)
Structure: AlphaFold pLDDT 68.81 · 2 PDB
Residue 581: an α-helix

Full TSC2 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

Similar variants

TSC2 p.Ser581Asn Uncertain significance ★★ ⚠ same residue
TSC2 p.Ser581Cys Uncertain significance ★★ ⚠ same residue
TSC2 p.Ser581Ile Uncertain significance ★★ ⚠ same residue
TSC2 p.Ser581= Benign/Likely benign ★★ same residue
TSC2 c.1443+2T>C Pathogenic/Likely pathogenic ★★ same condition
TSC2 c.1443+5G>C Pathogenic/Likely pathogenic ★★ same condition
TSC2 c.1599+1G>A Pathogenic ★★ same condition
TSC2 c.1716+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-ser581arg (accessed [today's date]).

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