Is CDC73 p.Pro275Ser (c.823C>T) pathogenic?

CDC73 p.Pro275Ser (c.823C>T) is classified Uncertain significance in CDC73 (ClinVar, Multiple submitters, 3 submitters; last evaluated 2025-09-20). AlphaMissense: likely benign (0.0637); Very rare (popmax 0.00162%, nfe); Associated with parathyroid gland carcinoma.

What condition is associated with CDC73 p.Pro275Ser (c.823C>T)?

CDC73 p.Pro275Ser (c.823C>T) is associated with parathyroid gland carcinoma, hyperparathyroidism 1, hyperparathyroidism 2 with jaw tumors (ClinVar).

How common is CDC73 p.Pro275Ser (c.823C>T) in the general population?

CDC73 p.Pro275Ser (c.823C>T) is very rare (popmax 0.00162%, nfe) (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.Pro275Ser (c.823C>T)?

AlphaMissense predicts likely benign (score 0.0637) — an in-silico prediction, not a clinical call.

CDC73 p.Pro275Ser

c.823C>T · rs758391256 · VCV1025146

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 3 submitters

AlphaMissense

likely benign

0.0637 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00162%, nfe)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

parathyroid gland carcinoma

Computational evidence

Protein change
AlphaMissense	0.0637	likely benign
REVEL	0.136	moderately benign-leaning
SaProt	LLR -8.40	tolerated
⇒ AlphaMissense, REVEL and SaProt all call this tolerated.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 4.9	GERP 1.8, phastCons 1
Regional constraint	o/e 0.57	unconstrained · MANE · 109 kb · p 8.5e-19 · regional, not allelic
Overall
CADD	21.9	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean tolerated — 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

Grpmax group 0.00162% European (non-Finnish) · 19/1,173,534 alleles

Filtering AF 0.00103% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000834%

Overall 0.00143% 23/1,606,892 alleles · very rare

Ancestry group	Frequency	1 in
Finnishnot grpmax-eligible	0.00625%	16,003
European (non-Finnish)grpmax	0.00162%	61,765

Finnish 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: CDC73
Protein: p.Pro275Ser
Coding: c.823C>T
MANE Select: NM_024529
dbSNP: rs758391256
Type: single nucleotide variant
Location: chr1:193147960 (GRCh38)
Gene constraint: LOEUF 0.42 · pLI 1.00 · ClinGen HI 3/3 (gnomAD)
Structure: AlphaFold pLDDT 73.94 · 21 PDB
Residue 275: the 'interaction with polr2a and paf1' region; the 'disordered' region

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

Also linked: hyperparathyroidism 1 hyperparathyroidism 2 with jaw tumors hereditary neoplastic syndrome

For Parathyroid carcinoma (Orphanet):

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

Similar variants

CDC73 p.Pro275= Likely benign ★★ 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
CDC73 c.423+1G>A Pathogenic ★★ same condition
CDC73 c.513-1G>A Likely pathogenic ★★ same condition
CDC73 p.Arg120Ter Pathogenic ★★ same condition
CDC73 p.Arg126Ter 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/cdc73-p-pro275ser (accessed [today's date]).

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