1-193233031-A-T

Position:

• chr1-193233031-A-T

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 3P and 2B. PM2 PP2 BP4_Moderate

The NM_024529.5(CDC73):​c.1193A>T​(p.Gln398Leu) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 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. Q398K) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: CDC73 NM_024529.5 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 6.20

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 Uncertain_significance. 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.
• BP4: Computational evidence support a benign effect (MetaRNN=0.23457107).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CDC73	NM_024529.5	c.1193A>T	p.Gln398Leu	missense_variant	14/17	ENST00000367435.5	NP_078805.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CDC73	ENST00000367435.5	c.1193A>T	p.Gln398Leu	missense_variant	14/17	1	NM_024529.5	ENSP00000356405.4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Parathyroid carcinoma;C1704981:Hyperparathyroidism 2 with jaw tumors;C1840402:Hyperparathyroidism 1 Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Fulgent Genetics, Fulgent Genetics

Feb 02, 2024

- -

Parathyroid carcinoma Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Mar 10, 2016

In summary, this variant is a novel missense change that is not predicted to affect protein function. There is no indication that it causes disease, but the available evidence is currently insufficient to prove that conclusively. Therefore, it has been classified as a Variant of Uncertain Significance. 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. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated, but these predictions have not been confirmed by published functional studies. This sequence change replaces glutamine with leucine at codon 398 of the CDC73 protein (p.Gln398Leu). The glutamine residue is moderately conserved and there is a moderate physicochemical difference between glutamine and leucine. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.075
BayesDel_addAF	Benign	-0.0015	T
BayesDel_noAF	Benign	-0.24
CADD	Uncertain	24
DANN	Uncertain	0.98
DEOGEN2	Uncertain	0.57	D;D;T
Eigen	Benign	-0.32
Eigen_PC	Benign	-0.14
FATHMM_MKL	Uncertain	0.93	D
LIST_S2	Uncertain	0.92	.;D;D
M_CAP	Benign	0.022	T
MetaRNN	Benign	0.23	T;T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	0.63	N;N;.
PrimateAI	Uncertain	0.66	T
PROVEAN	Uncertain	-2.7	.;D;.
REVEL	Benign	0.20
Sift	Uncertain	0.024	.;D;.
Sift4G	Uncertain	0.055	.;T;.
Polyphen		0.017	B;B;.
Vest4		0.36
MutPred		0.53		Gain of catalytic residue at Q398 (P = 0.004);Gain of catalytic residue at Q398 (P = 0.004);.;
MVP		0.62
MPC		1.1
ClinPred		0.90	D
GERP RS		2.7
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.35
gMVP		0.55

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: rs878855088; hg19: chr1-193202161;