rs770938530

Variant names:

• chr19-49854655-C-T
• rs770938530
• ENST00000391842.6:c.313C>T

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The ENST00000391842.6(PTOV1):​c.313C>T​(p.Arg105Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000205 in 1,461,200 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.000021 (0 hom.)
• Consequence: PTOV1 ENST00000391842.6 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.24
• Publications: 3 publications found

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

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PTOV1	NM_001364747.2	c.358C>T	p.Arg120Cys	missense_variant	Exon 3 of 13		NP_001351676.1
PTOV1	NM_001364749.2	c.358C>T	p.Arg120Cys	missense_variant	Exon 3 of 13		NP_001351678.1
PTOV1	NM_001305105.2	c.313C>T	p.Arg105Cys	missense_variant	Exon 3 of 13		NP_001292034.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PTOV1	ENST00000391842.6	c.313C>T	p.Arg105Cys	missense_variant	Exon 3 of 12	5		ENSP00000375717.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.0000160 AC: 4 AN: 250720 AF XY: 0.0000147

Gnomad AFR exome AF: 0.0000619

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.0000544

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000177

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000205 AC: 30 AN: 1461200 Hom.: 0 Cov.: 33 AF XY: 0.0000206 AC XY: 15 AN XY: 726936

African (AFR) AF: 0.0000597 AC: 2 AN: 33476

American (AMR) AF: 0.0000447 AC: 2 AN: 44716

Ashkenazi Jewish (ASJ) AF: 0.0000383 AC: 1 AN: 26130

East Asian (EAS) AF: 0.0000252 AC: 1 AN: 39694

South Asian (SAS) AF: 0.00 AC: 0 AN: 86256

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 52816

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.0000216 AC: 24 AN: 1111958

Other (OTH) AF: 0.00 AC: 0 AN: 60386

GnomAD4 genome Cov.: 32

Alfa AF: 0.0000370 Hom.: 0

Bravo AF: 0.0000340

ExAC AF: 0.0000165 AC: 2

EpiCase AF: 0.00

EpiControl AF: 0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Mar 26, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.313C>T (p.R105C) alteration is located in exon 3 (coding exon 3) of the PTOV1 gene. This alteration results from a C to T substitution at nucleotide position 313, causing the arginine (R) at amino acid position 105 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	Pathogenic	0.59
BayesDel_addAF	Benign	-0.082	T
BayesDel_noAF	Benign	-0.17
CADD	Pathogenic	27
DANN	Pathogenic	1.0
DEOGEN2	Benign	0.026	T;.;.;T;T;T;T
Eigen	Uncertain	0.41
Eigen_PC	Uncertain	0.39
FATHMM_MKL	Benign	0.72	D
LIST_S2	Pathogenic	0.97	D;D;D;D;.;.;D
M_CAP	Pathogenic	0.45	D
MetaRNN	Uncertain	0.45	T;T;T;T;T;T;T
MetaSVM	Benign	-0.77	T
MutationAssessor	Benign	1.4	.;.;.;L;L;L;.
PhyloP100		3.2
PrimateAI	Uncertain	0.59	T
PROVEAN	Benign	-1.6	.;.;.;N;.;.;.
REVEL	Uncertain	0.45
Sift	Benign	0.054	.;.;.;T;.;.;.
Sift4G	Uncertain	0.011	D;D;D;D;D;D;D
Polyphen		1.0	.;.;.;D;D;D;.
Vest4		0.56, 0.57, 0.57, 0.57
MVP		0.71
MPC		0.56
ClinPred		0.89	D
GERP RS		3.8
PromoterAI		-0.021	Neutral
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.12
gMVP		0.40
Mutation Taster		=85/15	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.080		Details are displayed if max score is > 0.2

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

Other links and lift over

dbSNP: rs770938530; hg19: chr19-50357912; COSMIC: COSV55590931; COSMIC: COSV55590931;