Is TERT p.Pro1066= (c.3198C>A) pathogenic?

TERT p.Pro1066= (c.3198C>A) is classified Likely benign in TERT (ClinVar, Single submitter, 1 submitter; last evaluated 2023-11-17). Absent from gnomAD v4.1; Associated with dyskeratosis congenita, autosomal dominant 2.

What condition is associated with TERT p.Pro1066= (c.3198C>A)?

TERT p.Pro1066= (c.3198C>A) is associated with dyskeratosis congenita, autosomal dominant 2, idiopathic pulmonary fibrosis (ClinVar).

How common is TERT p.Pro1066= (c.3198C>A) in the general population?

TERT p.Pro1066= (c.3198C>A) 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.

TERT p.Pro1066=

c.3198C>A · rs2478074260 · VCV2953950

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Absent

absent from gnomAD v4.1

Conditions

dyskeratosis congenita, autosomal dominant 2

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP -2.5	GERP -2.5
Overall
CADD	0.146	PHRED · no single calibrated threshold — expert panels disagree

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.Pro1066=
Coding: c.3198C>A
MANE Select: NM_198253
dbSNP: rs2478074260
Type: single nucleotide variant
Location: chr5:1254465 (GRCh38)
Gene constraint: LOEUF 0.593 · pLI <0.01 · ClinGen HI 1/3 (gnomAD)
Structure: AlphaFold pLDDT 80.98 · 32 PDB
Residue 1066: the 'cte' region; an α-helix

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

Disease context

dyskeratosis congenita, autosomal dominant 2 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: idiopathic pulmonary fibrosis

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 p.Pro1066Ser Uncertain significance ★ ⚠ same residue
TERT p.Pro1066Thr Uncertain significance ★ ⚠ same residue
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

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-pro1066 (accessed [today's date]).

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