Is TERT p.Glu90Asp (c.270G>C) pathogenic?

TERT p.Glu90Asp (c.270G>C) is classified Uncertain significance in TERT (ClinVar, Multiple submitters, 2 submitters; last evaluated 2023-11-16). AlphaMissense: ambiguous (0.5454); Absent from gnomAD v4.1; Associated with dyskeratosis congenita.

What condition is associated with TERT p.Glu90Asp (c.270G>C)?

TERT p.Glu90Asp (c.270G>C) is associated with dyskeratosis congenita, dyskeratosis congenita, autosomal dominant 2 (ClinVar).

How common is TERT p.Glu90Asp (c.270G>C) in the general population?

TERT p.Glu90Asp (c.270G>C) is absent from gnomAD v4.1 (gnomAD).

How is Dyskeratosis congenita inherited?

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

What do computational predictors say about TERT p.Glu90Asp (c.270G>C)?

AlphaMissense predicts ambiguous (score 0.5454) — an in-silico prediction, not a clinical call.

TERT p.Glu90Asp

c.270G>C · rs1751268971 · VCV3238576

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

AlphaMissense

ambiguous

0.5454 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Conditions

dyskeratosis congenita

Computational evidence

Protein change
AlphaMissense	0.5454	ambiguous
REVEL	0.475	indeterminate
SaProt	LLR -8.74	tolerated
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 0.63	GERP 6.4, phastCons 0.99
Regional constraint	o/e 0.60	unconstrained · MANE · 380 bp · p 1.3e-06 · regional, not allelic
Overall
CADD	21.6	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: TERT
Protein: p.Glu90Asp
Coding: c.270G>C
MANE Select: NM_198253
dbSNP: rs1751268971
Type: single nucleotide variant
Location: chr5:1294616 (GRCh38)
Gene constraint: LOEUF 0.593 · pLI <0.01 · ClinGen HI 1/3 (gnomAD)
Structure: AlphaFold pLDDT 80.98 · 32 PDB
Residue 90: the 'rna-interacting domain 1' region; the 'gq motif' region; an α-helix

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

Disease context

dyskeratosis congenita — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: dyskeratosis congenita, autosomal dominant 2

For Dyskeratosis congenita (Orphanet):

Inheritance: Autosomal dominant, Autosomal recessive, X-linked recessive
Onset: Adolescent, Adult, Childhood, Infancy, Neonatal
Prevalence: 1-9 / 1 000 000 (Europe)

Similar variants

TERT c.2130+1G>A Likely pathogenic ★★ same condition
TERT c.2130+2T>G Likely pathogenic ★★ same condition
TERT c.2131-2A>G Likely pathogenic ★★ same condition
TERT c.2286+1G>A Likely pathogenic ★★ same condition
TERT c.3157+1G>T Likely pathogenic ★★ same condition
TERT p.Ala1009Val Likely pathogenic ★★ same condition
TERT p.Ala716Thr Pathogenic/Likely pathogenic ★★ same condition
TERT p.Ala716Val 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/tert-p-glu90asp (accessed [today's date]).

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