Is CDC73 p.Ser6Arg (c.18C>A) pathogenic?

CDC73 p.Ser6Arg (c.18C>A) is classified Uncertain significance in CDC73 (ClinVar, Single submitter, 1 submitter; last evaluated 2022-10-20). AlphaMissense: likely pathogenic (0.9908); Absent from gnomAD v4.1; Associated with parathyroid gland carcinoma.

What condition is associated with CDC73 p.Ser6Arg (c.18C>A)?

CDC73 p.Ser6Arg (c.18C>A) is associated with parathyroid gland carcinoma (ClinVar).

How common is CDC73 p.Ser6Arg (c.18C>A) in the general population?

CDC73 p.Ser6Arg (c.18C>A) is absent from gnomAD v4.1 (gnomAD).

How is Parathyroid carcinoma inherited?

Typically Not applicable (Orphanet). A genetic counselor can assess individual risk for a family.

What do computational predictors say about CDC73 p.Ser6Arg (c.18C>A)?

AlphaMissense predicts likely pathogenic (score 0.9908) — an in-silico prediction, not a clinical call.

CDC73 p.Ser6Arg

c.18C>A · rs564726032 · VCV2809114

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely pathogenic

0.9908 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

3/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

parathyroid gland carcinoma

Computational evidence

Protein change
AlphaMissense	0.9908	likely pathogenic
REVEL	0.681	pathogenic-leaning
SaProt	LLR -14.39	damaging
⇒ AlphaMissense, REVEL and SaProt all call this damaging.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 1.9	GERP -0.3, phastCons 1
Regional constraint	o/e 0.57	unconstrained · MANE · 16 kb · p 1.1e-08 · regional, not allelic
Overall
CADD	23.1	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean damaging — a triage signal, not a reclassification

AlphaMissense carries the ACMG weight for missense; REVEL and SaProt are independent agreement signals.

Population frequency

gnomAD v4.1 · exomes + genomes

Absent from gnomAD v4.1. Not observed in any sequenced alleles — a rarity signal (ACMG PM2-supporting), not evidence of pathogenicity on its own.

Variant & gene context

Gene: CDC73
Protein: p.Ser6Arg
Coding: c.18C>A
MANE Select: NM_024529
dbSNP: rs564726032
Type: single nucleotide variant
Location: chr1:193122218 (GRCh38)
Gene constraint: LOEUF 0.42 · pLI 1.00 · ClinGen HI 3/3 (gnomAD)
Structure: AlphaFold pLDDT 73.94 · 21 PDB
Residue 6: a UniProt-annotated variant site (in hrpt2; uncertain significance; found as somatic mutation in a parathyroid carcinoma sample from a patient who also carries a germline mutation causing a splicing defect); an α-helix

Full CDC73 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

parathyroid gland carcinoma — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Parathyroid carcinoma (Orphanet):

Inheritance: Not applicable
Onset: Adult
Prevalence: <1 / 1 000 000 (Europe)

Similar variants

CDC73 p.Ser6Ile Uncertain significance ★★ ⚠ same residue
CDC73 p.Ser6= Likely benign ★★ same residue
CDC73 p.Ser6Gly Conflicting classifications of pathogenicity ★ ⚠ same residue
CDC73 p.Ser6fs Pathogenic ★ same residue
CDC73 p.Ser6Asn Uncertain significance ★ ⚠ same residue
CDC73 c.1030+2T>C Likely pathogenic ★★ same condition
CDC73 c.131+1G>A Pathogenic/Likely pathogenic ★★ same condition
CDC73 c.237+1G>A 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/cdc73-p-ser6arg (accessed [today's date]).

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