Is PARN p.Ala501Val (c.1502C>T) pathogenic?

PARN p.Ala501Val (c.1502C>T) is classified Uncertain significance in PARN (ClinVar, Single submitter, 1 submitter; last evaluated 2024-07-15). AlphaMissense: likely pathogenic (0.8269); Very rare (popmax 0.000679%, nfe); Associated with dyskeratosis congenita, autosomal recessive 6.

What condition is associated with PARN p.Ala501Val (c.1502C>T)?

PARN p.Ala501Val (c.1502C>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.Ala501Val (c.1502C>T) in the general population?

PARN p.Ala501Val (c.1502C>T) is very rare (popmax 0.000679%, nfe) (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.Ala501Val (c.1502C>T)?

AlphaMissense predicts likely pathogenic (score 0.8269) — an in-silico prediction, not a clinical call.

PARN p.Ala501Val

c.1502C>T · VCV3760592

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely pathogenic

0.8269 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.000679%, nfe)

Missense predictors

1/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

dyskeratosis congenita, autosomal recessive 6

Computational evidence

Protein change
AlphaMissense	0.8269	likely pathogenic
REVEL	0.15	moderately benign-leaning
SaProt	LLR -5.01	tolerated
⇒ AlphaMissense calls this damaging; REVEL and SaProt do not.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 12	GERP 2.2, phastCons 1
Regional constraint	o/e 1.03	unconstrained · MANE · 193 kb · p 0.44 · regional, not allelic
Overall
CADD	27.6	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

Grpmax group 0.000679% European (non-Finnish) · 8/1,178,926 alleles

Filtering AF 0.000292% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000211%

Overall 0.000559% 9/1,610,610 alleles · very rare exomes 9/1,458,438 · genomes 0/152,172 · joint denominator

Ancestry group	Frequency	1 in
Remaining individualsnot grpmax-eligible	0.0016%	62,366
European (non-Finnish)grpmax	0.000679%	147,366

Remaining individuals shows a higher raw frequency than the grpmax group above it. gnomAD excludes bottlenecked groups — Finnish, Ashkenazi Jewish, Amish and “Remaining individuals” — from grpmax, because founder effects make their frequencies unrepresentative for filtering. The table is sorted by frequency, so an excluded group can sit above the grpmax row.

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.Ala501Val
Coding: c.1502C>T
MANE Select: NM_002582
Type: single nucleotide variant
Location: chr16:14482806 (GRCh38)
Gene constraint: LOEUF 0.918 · pLI <0.01 · ClinGen HI 3/3 (gnomAD)
Structure: AlphaFold pLDDT 81.60 · 3 PDB

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.Ala501Ser 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
PARN p.Arg128Ter 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-ala501val (accessed [today's date]).

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