19-49854442-G-T

Variant names:

• chr19-49854442-G-T
• ENST00000391842.6:c.208G>T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001364748.2(PTOV1):​c.-216G>T variant causes a 5 prime UTR premature start codon gain change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000685 in 1,459,650 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: PTOV1 NM_001364748.2 5_prime_UTR_premature_start_codon_gain
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.752

Genes affected

PTOV1 (HGNC:9632): (PTOV1 extended AT-hook containing adaptor protein) This gene encodes a protein that was found to be overexpressed in prostate adenocarcinomas. The encoded protein was found to interact with the lipid raft protein flotillin-1 and shuttle it from the cytoplasm to the nucleus in a cell cycle dependent manner. Alternative splicing of this gene results in multiple transcript variants. [provided by RefSeq, Feb 2015]

ENSG00000268047 (HGNC:):

MIR4749 (HGNC:41760): (microRNA 4749) microRNAs (miRNAs) are short (20-24 nt) non-coding RNAs that are involved in post-transcriptional regulation of gene expression in multicellular organisms by affecting both the stability and translation of mRNAs. miRNAs are transcribed by RNA polymerase II as part of capped and polyadenylated primary transcripts (pri-miRNAs) that can be either protein-coding or non-coding. The primary transcript is cleaved by the Drosha ribonuclease III enzyme to produce an approximately 70-nt stem-loop precursor miRNA (pre-miRNA), which is further cleaved by the cytoplasmic Dicer ribonuclease to generate the mature miRNA and antisense miRNA star (miRNA*) products. The mature miRNA is incorporated into a RNA-induced silencing complex (RISC), which recognizes target mRNAs through imperfect base pairing with the miRNA and most commonly results in translational inhibition or destabilization of the target mRNA. The RefSeq represents the predicted microRNA stem-loop. [provided by RefSeq, Sep 2009]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.19150677).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PTOV1	NM_001364748.2	c.-216G>T		5_prime_UTR_premature_start_codon_gain_variant	Exon 2 of 13		NP_001351677.1
PTOV1	NM_001364750.2	c.-216G>T		5_prime_UTR_premature_start_codon_gain_variant	Exon 2 of 13		NP_001351679.1
PTOV1	NM_001364747.2	c.253G>T	p.Gly85Cys	missense_variant	Exon 2 of 13		NP_001351676.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PTOV1	ENST00000391842.6	c.208G>T	p.Gly70Cys	missense_variant	Exon 2 of 12	5		ENSP00000375717.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.85e-7 AC: 1 AN: 1459650 Hom.: 0 Cov.: 32 AF XY: 0.00000138 AC XY: 1 AN XY: 726140

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: 0.0000116

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Aug 12, 2021

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.208G>T (p.G70C) alteration is located in exon 2 (coding exon 2) of the PTOV1 gene. This alteration results from a G to T substitution at nucleotide position 208, causing the glycine (G) at amino acid position 70 to be replaced by a cysteine (C). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.12
BayesDel_addAF	Uncertain	0.013	T
BayesDel_noAF	Benign	-0.22
CADD	Benign	18
DANN	Uncertain	0.99
DEOGEN2	Benign	0.022	T;.;.;T;T;T;T
Eigen	Benign	-0.46
Eigen_PC	Benign	-0.48
FATHMM_MKL	Benign	0.53	D
LIST_S2	Benign	0.75	T;T;T;T;.;.;T
M_CAP	Uncertain	0.11	D
MetaRNN	Benign	0.19	T;T;T;T;T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	0.0	.;.;.;N;N;N;.
PrimateAI	Uncertain	0.73	T
PROVEAN	Benign	-1.3	.;.;.;N;.;.;.
REVEL	Benign	0.13
Sift	Uncertain	0.0030	.;.;.;D;.;.;.
Sift4G	Uncertain	0.031	D;D;D;D;D;D;D
Polyphen		0.99	.;.;.;D;D;D;.
Vest4		0.50, 0.49, 0.52, 0.50
MutPred		0.26		.;.;.;Loss of glycosylation at S72 (P = 0.0493);Loss of glycosylation at S72 (P = 0.0493);Loss of glycosylation at S72 (P = 0.0493);.;
MVP		0.70
MPC		0.52
ClinPred		0.53	D
GERP RS		2.0
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.20
gMVP		0.40

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr19-50357699;