Is PARN p.Ser587= (c.1761C>T) pathogenic?

PARN p.Ser587= (c.1761C>T) is classified Benign/Likely benign in PARN (ClinVar, Multiple submitters, 4 submitters; last evaluated 2026-01-31). Rare (popmax 0.331%, afr); Associated with dyskeratosis congenita, autosomal recessive 6.

What condition is associated with PARN p.Ser587= (c.1761C>T)?

PARN p.Ser587= (c.1761C>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.Ser587= (c.1761C>T) in the general population?

PARN p.Ser587= (c.1761C>T) is rare (popmax 0.331%, afr) (gnomAD).

How is Dyskeratosis congenita inherited?

Typically Autosomal dominant, Autosomal recessive (Orphanet). A genetic counselor can assess individual risk for a family.

PARN p.Ser587=

c.1761C>T · rs148052946 · VCV788348

Benign/Likely benign Multiple submitters

Classification

Benign/Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 4 submitters

gnomAD v4.1

Rare

rare (popmax 0.331%, afr)

Conditions

dyskeratosis congenita, autosomal recessive 6

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 -0.24	GERP -5.1, phastCons 0.003
Overall
CADD	4.269	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.331% African / African-American · 248/74,962 alleles

Filtering AF 0.297% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.284%

Overall 0.0181% 292/1,613,264 alleles · rare exomes 136/1,461,070 · genomes 156/152,194 · joint denominator

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.331%	302
Middle Eastern	0.033%	3,031
Admixed American	0.0283%	3,530
Remaining individualsnot grpmax-eligible	0.0256%	3,904
South Asian	0.0022%	45,533
European (non-Finnish)	0.000594%	168,475

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.Ser587=
Coding: c.1761C>T
MANE Select: NM_002582
dbSNP: rs148052946
Type: single nucleotide variant
Location: chr16:14446991 (GRCh38)
Gene constraint: LOEUF 0.918 · pLI <0.01 · ClinGen HI 3/3 (gnomAD)
Structure: AlphaFold pLDDT 81.60 · 3 PDB
Residue 587: a modified residue (phosphoserine); the 'disordered' region

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 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
PARN p.Arg237Ter 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-ser587 (accessed [today's date]).

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