Is RTEL1 p.Phe1255= (c.3765C>T) pathogenic?

RTEL1 p.Phe1255= (c.3765C>T) is classified Likely benign in RTEL1 (ClinVar, Single submitter, 1 submitter; last evaluated 2023-06-24). Very rare (popmax 8.48e-05%, nfe); Associated with dyskeratosis congenita, autosomal recessive 5.

What condition is associated with RTEL1 p.Phe1255= (c.3765C>T)?

RTEL1 p.Phe1255= (c.3765C>T) is associated with dyskeratosis congenita, autosomal recessive 5, pulmonary fibrosis and/or bone marrow failure, Telomere-related, 3 (ClinVar).

How common is RTEL1 p.Phe1255= (c.3765C>T) in the general population?

RTEL1 p.Phe1255= (c.3765C>T) is very rare (popmax 8.48e-05%, nfe) (gnomAD).

RTEL1 p.Phe1255=

c.3765C>T · rs749057208 · VCV2931145

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

very rare (popmax 8.48e-05%, nfe)

Conditions

dyskeratosis congenita, autosomal recessive 5

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	<0.2	all four deltas below 0.2 · C>A here scores Δ0.38 · evaluated, not missing
Constraint at this position
Conservation	phyloP 3.1	GERP 1.4, phastCons 1
Overall
CADD	19.32	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 8.48e-05% European (non-Finnish) · 1/1,179,912 alleles

Overall 6.2e-05% 1/1,612,070 alleles · very rare exomes 1/1,459,740 · genomes 0/152,330 · joint denominator

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: RTEL1
Protein: p.Phe1255=
Coding: c.3765C>T
MANE Select: NM_001283009
dbSNP: rs749057208
Type: single nucleotide variant
Location: chr20:63695593 (GRCh38)
Gene constraint: LOEUF 0.661 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 72.64 · 3 PDB

Full RTEL1 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

dyskeratosis congenita, autosomal recessive 5 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: pulmonary fibrosis and/or bone marrow failure, Telomere-related, 3

Similar variants

RTEL1 p.Phe1255Ile Uncertain significance ★ same residue
RTEL1 c.1037+1G>T Likely pathogenic ★★ same condition
RTEL1 c.1192-2A>G Likely pathogenic ★★ same condition
RTEL1 c.1596-1G>A Likely pathogenic ★★ same condition
RTEL1 c.2142-1G>C Likely pathogenic ★★ same condition
RTEL1 c.2265+1G>T Likely pathogenic ★★ same condition
RTEL1 c.2413+1G>A Likely pathogenic ★★ same condition
RTEL1 c.2413+1G>C 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/rtel1-p-phe1255 (accessed [today's date]).

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