3-46883582-C-G

Position:

• chr3-46883582-C-G

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 0P and 2B. BP4_Moderate

The NM_000316.3(PTH1R):​c.23C>G​(p.Pro8Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000504 in 1,387,812 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000050 (0 hom.)
• Consequence: PTH1R NM_000316.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.36

Genes affected

PTH1R (HGNC:9608): (parathyroid hormone 1 receptor) The protein encoded by this gene is a member of the G-protein coupled receptor family 2. This protein is a receptor for parathyroid hormone (PTH) and for parathyroid hormone-like hormone (PTHLH). The activity of this receptor is mediated by G proteins which activate adenylyl cyclase and also a phosphatidylinositol-calcium second messenger system. Defects in this receptor are known to be the cause of Jansen's metaphyseal chondrodysplasia (JMC), chondrodysplasia Blomstrand type (BOCD), as well as enchodromatosis. Two transcript variants encoding the same protein have been found for this gene. [provided by RefSeq, May 2010]

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.11192399).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PTH1R	NM_000316.3	c.23C>G	p.Pro8Arg	missense_variant	3/16	ENST00000449590.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PTH1R	ENST00000449590.6	c.23C>G	p.Pro8Arg	missense_variant	3/16	1	NM_000316.3	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000504 AC: 7 AN: 1387812 Hom.: 0 Cov.: 31 AF XY: 0.00000438 AC XY: 3 AN XY: 684808

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000280

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: 0.00000464

Gnomad4 OTH exome AF: 0.0000173

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000756

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Oct 05, 2023

This sequence change replaces proline, which is neutral and non-polar, with arginine, which is basic and polar, at codon 8 of the PTH1R protein (p.Pro8Arg). The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. This variant has not been reported in the literature in individuals affected with PTH1R-related conditions. An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be tolerated. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.11
BayesDel_addAF	Benign	-0.20	T
BayesDel_noAF	Benign	-0.52
CADD	Uncertain	23
DANN	Benign	0.86
DEOGEN2	Benign	0.32	T;T;.;T;T
Eigen	Benign	-0.34
Eigen_PC	Benign	-0.14
FATHMM_MKL	Uncertain	0.86	D
LIST_S2	Benign	0.76	.;.;T;T;.
M_CAP	Benign	0.0039	T
MetaRNN	Benign	0.11	T;T;T;T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	0.0	N;N;.;N;N
MutationTaster	Benign	0.79	N;N;N;N
PrimateAI	Uncertain	0.63	T
PROVEAN	Benign	-0.89	N;N;N;N;N
REVEL	Benign	0.079
Sift	Benign	0.53	T;T;T;T;T
Sift4G	Benign	0.78	T;T;T;T;T
Polyphen		0.0	B;B;.;B;B
Vest4		0.26
MutPred		0.38		Gain of MoRF binding (P = 0.0037);Gain of MoRF binding (P = 0.0037);Gain of MoRF binding (P = 0.0037);Gain of MoRF binding (P = 0.0037);Gain of MoRF binding (P = 0.0037);
MVP		0.11
MPC		0.43
ClinPred		0.12	T
GERP RS		3.5
Varity_R		0.13
gMVP		0.63

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: rs1257452316; hg19: chr3-46925072;