Is RTEL1 p.Ala101= (c.303T>C) pathogenic?

RTEL1 p.Ala101= (c.303T>C) is classified Likely benign in RTEL1 (ClinVar, Multiple submitters, 2 submitters; last evaluated 2026-05-27). Very rare (popmax 0.00223%, eas); Associated with pulmonary fibrosis and/or bone marrow failure, Telomere-related, 3.

How common is RTEL1 p.Ala101= (c.303T>C) in the general population?

RTEL1 p.Ala101= (c.303T>C) is very rare (popmax 0.00223%, eas) (gnomAD).

RTEL1 p.Ala101=

Q: What condition is associated with RTEL1 p.Ala101= (c.303T>C)?

RTEL1 p.Ala101= (c.303T>C) is associated with pulmonary fibrosis and/or bone marrow failure, Telomere-related, 3, dyskeratosis congenita, autosomal recessive 5 (ClinVar).

c.303T>C · rs2146150593 · VCV1618256

Likely benign Multiple submitters

Classification

Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

gnomAD v4.1

Rare

very rare (popmax 0.00223%, eas)

Conditions

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

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 -0.69	GERP 0.54, phastCons 0.008
Overall
CADD	8.014	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00223% East Asian · 1/44,878 alleles

Overall 6.84e-05% 1/1,461,654 alleles · very rare

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.Ala101=
Coding: c.303T>C
MANE Select: NM_001283009
dbSNP: rs2146150593
Type: single nucleotide variant
Location: chr20:63661851 (GRCh38)
Gene constraint: LOEUF 0.661 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 72.64 · 3 PDB
Residue 101: the helicase atp-binding domain

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

Disease context

pulmonary fibrosis and/or bone marrow failure, Telomere-related, 3 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: dyskeratosis congenita, autosomal recessive 5

Similar variants

RTEL1 p.Ala101Thr Likely pathogenic ★ ⚠ 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-ala101 (accessed [today's date]).

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