1-193212398-A-G

Position:

• chr1-193212398-A-G

Variant summary

Our verdict is Likely benign. Variant got -1 ACMG points: 3P and 4B. PM2 PP2 BS2

The NM_024529.5(CDC73):​c.1075A>G​(p.Thr359Ala) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000346 in 1,444,388 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. T359I) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000035 (0 hom.)
• Consequence: CDC73 NM_024529.5 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 8.42

Genes affected

CDC73 (HGNC:16783): (cell division cycle 73) This gene encodes a tumor suppressor that is involved in transcriptional and post-transcriptional control pathways. The protein is a component of the the PAF protein complex, which associates with the RNA polymerase II subunit POLR2A and with a histone methyltransferase complex. This protein appears to facilitate the association of 3' mRNA processing factors with actively-transcribed chromatin. Mutations in this gene have been linked to hyperparathyroidism-jaw tumor syndrome, familial isolated hyperparathyroidism, and parathyroid carcinoma. [provided by RefSeq, Jul 2009]

CDC73 (HGNC:):

ACMG classification

Verdict is Likely_benign. Variant got -1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), CDC73. . Gene score misZ 3.7315 (greater than the threshold 3.09). Trascript score misZ 3.3639 (greater than threshold 3.09). GenCC has associacion of gene with parathyroid gland carcinoma, familial isolated hyperparathyroidism, hyperparathyroidism 2 with jaw tumors, hyperparathyroidism 1.
• BS2: High AC in GnomAdExome4 at 5 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CDC73	NM_024529.5	c.1075A>G	p.Thr359Ala	missense_variant	13/17	ENST00000367435.5	NP_078805.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CDC73	ENST00000367435.5	c.1075A>G	p.Thr359Ala	missense_variant	13/17	1	NM_024529.5	ENSP00000356405.4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000346 AC: 5 AN: 1444388 Hom.: 0 Cov.: 28 AF XY: 0.00000139 AC XY: 1 AN XY: 718660

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000454

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Parathyroid carcinoma Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Sep 26, 2019

In summary, this variant is a novel missense change with uncertain impact on protein function. It has been classified as a Variant of Uncertain Significance. Algorithms developed to predict the effect of missense changes on protein structure and function do not agree on the potential impact of this missense change (SIFT: "Tolerated"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Class C0"). This variant is not present in population databases (ExAC no frequency) and has not been reported in the literature in individuals with a CDC73-related disease. This sequence change replaces threonine with alanine at codon 359 of the CDC73 protein (p.Thr359Ala). The threonine residue is moderately conserved and there is a small physicochemical difference between threonine and alanine. -

Hereditary cancer-predisposing syndrome Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Feb 02, 2023

The p.T359A variant (also known as c.1075A>G), located in coding exon 13 of the CDC73 gene, results from an A to G substitution at nucleotide position 1075. The threonine at codon 359 is replaced by alanine, an amino acid with similar properties. This amino acid position is highly conserved in available vertebrate species. In addition, the in silico prediction for this alteration is inconclusive. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.95
BayesDel_addAF	Pathogenic	0.20	D
BayesDel_noAF	Uncertain	0.050
CADD	Uncertain	24
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.76	D;D;T
Eigen	Uncertain	0.56
Eigen_PC	Uncertain	0.64
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.94	.;D;D
M_CAP	Benign	0.037	D
MetaRNN	Uncertain	0.68	D;D;D
MetaSVM	Benign	-0.58	T
MutationAssessor	Uncertain	2.5	M;M;.
PrimateAI	Pathogenic	0.88	D
PROVEAN	Uncertain	-3.3	.;D;.
REVEL	Uncertain	0.34
Sift	Uncertain	0.010	.;D;.
Sift4G	Uncertain	0.028	.;D;.
Polyphen		0.74	P;P;.
Vest4		0.84
MutPred		0.49		Loss of phosphorylation at T359 (P = 0.0355);Loss of phosphorylation at T359 (P = 0.0355);.;
MVP		0.61
MPC		2.0
ClinPred		0.97	D
GERP RS		6.1
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.81
gMVP		0.72

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs1060500010; hg19: chr1-193181528;