Is DKC1 p.Ser485= (c.1455C>T) pathogenic?

DKC1 p.Ser485= (c.1455C>T) is classified Likely benign in DKC1 (ClinVar, Single submitter, 1 submitter; last evaluated 2024-04-01). Very rare (popmax 0.00457%, amr); Associated with dyskeratosis congenita.

What condition is associated with DKC1 p.Ser485= (c.1455C>T)?

DKC1 p.Ser485= (c.1455C>T) is associated with dyskeratosis congenita (ClinVar).

How common is DKC1 p.Ser485= (c.1455C>T) in the general population?

DKC1 p.Ser485= (c.1455C>T) is very rare (popmax 0.00457%, amr) (gnomAD).

How is Dyskeratosis congenita inherited?

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

DKC1 p.Ser485=

c.1455C>T · rs782136109 · VCV1152536

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

very rare (popmax 0.00457%, amr)

Conditions

dyskeratosis congenita

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>G here scores Δ0.41 · evaluated, not missing
Constraint at this position
Conservation	phyloP -6	GERP -0.98
Overall
CADD	0.201	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00457% Admixed American · 2/43,720 alleles

Filtering AF 0.000758% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000284%

Overall 0.000835% 10/1,197,386 alleles · very rare

Ancestry group	Frequency	1 in
Admixed Americangrpmax	0.00457%	21,860
South Asian	0.00181%	55,340
European (non-Finnish)	0.000788%	126,891

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: DKC1
Protein: p.Ser485=
Coding: c.1455C>T
MANE Select: NM_001363
dbSNP: rs782136109
Type: single nucleotide variant
Location: chrX:154776303 (GRCh38)
Structure: AlphaFold pLDDT 79.74 · 7 PDB
Residue 485: a modified residue (phosphoserine); the 'disordered' region; the 'nuclear and nucleolar localization' region

Full DKC1 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

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

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

DKC1 p.Ser485Asn Uncertain significance ★ same residue
DKC1 p.Ala353Val Pathogenic ★★ ⚠ same condition
DKC1 p.Asn63Lys Pathogenic/Likely pathogenic ★★ ⚠ same condition
DKC1 p.Thr49Met Pathogenic ★★ ⚠ same condition
DKC1 p.Thr66Ala Pathogenic/Likely pathogenic ★★ ⚠ same condition
DKC1 c.1339-10T>G Uncertain significance ★★ same condition
DKC1 c.16+5G>A Uncertain significance ★★ same condition
DKC1 c.640+3G>A Uncertain significance ★★ 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/dkc1-p-ser485 (accessed [today's date]).

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