Is CDC73 p.Thr45= (c.135T>C) pathogenic?

CDC73 p.Thr45= (c.135T>C) is classified Likely benign in CDC73 (ClinVar, Multiple submitters, 2 submitters; last evaluated 2025-03-19). Very rare (popmax 8.96e-05%, nfe); Associated with parathyroid gland carcinoma.

What condition is associated with CDC73 p.Thr45= (c.135T>C)?

CDC73 p.Thr45= (c.135T>C) is associated with parathyroid gland carcinoma, hereditary neoplastic syndrome (ClinVar).

How common is CDC73 p.Thr45= (c.135T>C) in the general population?

CDC73 p.Thr45= (c.135T>C) is very rare (popmax 8.96e-05%, nfe) (gnomAD).

How is Parathyroid carcinoma inherited?

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

CDC73 p.Thr45=

c.135T>C · rs2527289270 · VCV2450570

Likely benign Multiple submitters

Classification

Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

gnomAD v4.1

Rare

very rare (popmax 8.96e-05%, nfe)

Conditions

parathyroid gland carcinoma

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 · T>A here scores Δ0.30 · evaluated, not missing
Constraint at this position
Conservation	phyloP 0.14	GERP -1, phastCons 0.98
Overall
CADD	9.876	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 8.96e-05% European (non-Finnish) · 1/1,115,756 alleles

Overall 7.19e-05% 1/1,391,430 alleles · very rare

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.Thr45=
Coding: c.135T>C
MANE Select: NM_024529
dbSNP: rs2527289270
Type: single nucleotide variant
Location: chr1:193125115 (GRCh38)
Gene constraint: LOEUF 0.42 · pLI 1.00 · ClinGen HI 3/3 (gnomAD)
Structure: AlphaFold pLDDT 73.94 · 21 PDB

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: hereditary neoplastic syndrome

For Parathyroid carcinoma (Orphanet):

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

Similar variants

CDC73 p.Thr45Ala 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
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-thr45 (accessed [today's date]).

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