Is PARN p.Glu263Val (c.788A>T) pathogenic?

PARN p.Glu263Val (c.788A>T) is classified Uncertain significance in PARN (ClinVar, Single submitter, 1 submitter; last evaluated 2025-06-04). AlphaMissense: ambiguous (0.3661); Very rare (popmax 0.00406%, afr); Associated with dyskeratosis congenita, autosomal recessive 6.

What condition is associated with PARN p.Glu263Val (c.788A>T)?

PARN p.Glu263Val (c.788A>T) is associated with dyskeratosis congenita, autosomal recessive 6, pulmonary fibrosis and/or bone marrow failure, Telomere-related, 4 (ClinVar).

How common is PARN p.Glu263Val (c.788A>T) in the general population?

PARN p.Glu263Val (c.788A>T) is very rare (popmax 0.00406%, afr) (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 PARN p.Glu263Val (c.788A>T)?

AlphaMissense predicts ambiguous (score 0.3661) — an in-silico prediction, not a clinical call.

PARN p.Glu263Val

c.788A>T · VCV4788117

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

ambiguous

0.3661 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00406%, afr)

Missense predictors

1/2 damaging

REVEL, SaProt · AlphaMissense indeterminate

Conditions

dyskeratosis congenita, autosomal recessive 6

Computational evidence

Protein change
AlphaMissense	0.3661	ambiguous
REVEL	0.127	moderately benign-leaning
SaProt	LLR -11.47	damaging
⇒ SaProt calls this damaging; REVEL does not; AlphaMissense is indeterminate.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 4.1	GERP 0.029, phastCons 1
Regional constraint	o/e 1.03	unconstrained · MANE · 193 kb · p 0.44 · regional, not allelic
Overall
CADD	25.0	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

Grpmax group 0.00406% African / African-American · 3/73,944 alleles

Filtering AF 0.00108% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000499%

Overall 0.00019% 3/1,577,338 alleles · very rare exomes 1/1,425,188 · genomes 2/152,150 · 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: PARN
Protein: p.Glu263Val
Coding: c.788A>T
MANE Select: NM_002582
Type: single nucleotide variant
Location: chr16:14599956 (GRCh38)
Gene constraint: LOEUF 0.918 · pLI <0.01 · ClinGen HI 3/3 (gnomAD)
Structure: AlphaFold pLDDT 81.60 · 3 PDB
Residue 263: an α-helix

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

Disease context

dyskeratosis congenita, autosomal recessive 6 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: pulmonary fibrosis and/or bone marrow failure, Telomere-related, 4

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

PARN p.Glu263Gln Uncertain significance ★★ ⚠ same residue
PARN p.Glu263Leu Uncertain significance ★ same residue
PARN c.1006-2A>G Pathogenic/Likely pathogenic ★★ same condition
PARN c.1405+1G>T Likely pathogenic ★★ same condition
PARN c.1481-1G>A Pathogenic/Likely pathogenic ★★ same condition
PARN c.178-1G>C Likely pathogenic ★★ same condition
PARN c.784-1G>A Likely pathogenic ★★ same condition
PARN c.962+2T>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/parn-p-glu263val (accessed [today's date]).

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