Is DRC1 p.Lys686= (c.2058G>A) pathogenic?

DRC1 p.Lys686= (c.2058G>A) is classified Likely benign in DRC1 (ClinVar, Single submitter, 1 submitter; last evaluated 2021-08-13). Very rare (popmax 0.00333%, amr); Associated with primary ciliary dyskinesia.

What condition is associated with DRC1 p.Lys686= (c.2058G>A)?

DRC1 p.Lys686= (c.2058G>A) is associated with primary ciliary dyskinesia (ClinVar).

How common is DRC1 p.Lys686= (c.2058G>A) in the general population?

DRC1 p.Lys686= (c.2058G>A) is very rare (popmax 0.00333%, amr) (gnomAD).

How is Primary ciliary dyskinesia inherited?

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

DRC1 p.Lys686=

c.2058G>A · rs1386352972 · VCV1536091

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

very rare (popmax 0.00333%, amr)

Conditions

primary ciliary dyskinesia

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 0.076	GERP -2.9, phastCons 0.1
Overall
CADD	2.512	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00333% Admixed American · 2/59,994 alleles

Filtering AF 0.000553% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000207%

Overall 0.000248% 4/1,613,976 alleles · very rare exomes 3/1,461,792 · genomes 1/152,184 · joint denominator

Ancestry group	Frequency	1 in
Admixed Americangrpmax	0.00333%	29,997
European (non-Finnish)	0.000169%	589,995

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: DRC1
Protein: p.Lys686=
Coding: c.2058G>A
MANE Select: NM_145038
dbSNP: rs1386352972
Type: single nucleotide variant
Location: chr2:26454785 (GRCh38)
Gene constraint: LOEUF 0.867 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 75.44 · 1 PDB
Residue 686: a UniProt-annotated variant site (in cild21; multiple flagellar abnormalities are present in patient sperm); a UniProt-annotated variant site (in spgf80; no protein detected in a homozygous patient sperm); a UniProt-annotated variant site (in cild21); a UniProt-annotated variant site (in spgf80)

Full DRC1 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

primary ciliary dyskinesia — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Primary ciliary dyskinesia (Orphanet):

Inheritance: Autosomal dominant, Autosomal recessive, X-linked recessive
Onset: Neonatal
Prevalence: 1-5 / 10 000 (Pakistan)

Similar variants

DRC1 p.Lys686Glu Uncertain significance ★ ⚠ same residue
DRC1 p.Lys686Ter Pathogenic same residue
DRC1 p.Gln118Ter Pathogenic/Likely pathogenic ★★ same condition
DRC1 p.Gln337Ter Pathogenic/Likely pathogenic ★★ same condition
DRC1 p.Ser642Ter Pathogenic/Likely pathogenic ★★ same condition
DRC1 p.Ala250Val Uncertain significance ★★ ⚠ same condition
DRC1 p.Ala391Val Uncertain significance ★★ ⚠ same condition
DRC1 p.Ala416Gly 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/drc1-p-lys686 (accessed [today's date]).

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