3-8753201-G-A

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PP3_ModerateBS2

The NM_000916.4(OXTR):c.946C>T(p.Leu316Phe) variant causes a missense change. The variant allele was found at a frequency of 0.00000479 in 1,461,882 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000048 ( 0 hom. )

Consequence

OXTR
NM_000916.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 3.87

Publications

0 publications found

Variant links:

Genes affected

OXTR (HGNC:8529): (oxytocin receptor) The protein encoded by this gene belongs to the G-protein coupled receptor family and acts as a receptor for oxytocin. Its activity is mediated by G proteins which activate a phosphatidylinositol-calcium second messenger system. The oxytocin-oxytocin receptor system plays an important role in the uterus during parturition. [provided by RefSeq, Jul 2008]

OXTR links:

CAV3 (HGNC:1529): (caveolin 3) This gene encodes a caveolin family member, which functions as a component of the caveolae plasma membranes found in most cell types. Caveolin proteins are proposed to be scaffolding proteins for organizing and concentrating certain caveolin-interacting molecules. Mutations identified in this gene lead to interference with protein oligomerization or intra-cellular routing, disrupting caveolae formation and resulting in Limb-Girdle muscular dystrophy type-1C (LGMD-1C), hyperCKemia or rippling muscle disease (RMD). Alternative splicing has been identified for this locus, with inclusion or exclusion of a differentially spliced intron. In addition, transcripts utilize multiple polyA sites and contain two potential translation initiation sites. [provided by RefSeq, Jul 2008]

CAV3 Gene-Disease associations (from GenCC):

caveolinopathy
Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
autosomal dominant limb-girdle muscular dystrophy type 1C
Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
long QT syndrome 9
Inheritance: AD Classification: MODERATE, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics
rippling muscle disease 2
Inheritance: AD Classification: MODERATE Submitted by: Ambry Genetics
distal myopathy, Tateyama type
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
inherited rippling muscle disease
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
Brugada syndrome
Inheritance: AD Classification: LIMITED Submitted by: Genomics England PanelApp
hypertrophic cardiomyopathy 1
Inheritance: AD Classification: LIMITED Submitted by: PanelApp Australia
long QT syndrome
Inheritance: AD Classification: LIMITED Submitted by: ClinGen

CAV3 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -2 ACMG points.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.855

BS2

High AC in GnomAdExome4 at 7 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
OXTR	NM_000916.4 link	c.946C>T	p.Leu316Phe	missense_variant	Exon 4 of 4	ENST00000316793.8	NP_000907.2	P30559B2R9L7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
OXTR	ENST00000316793.8 link	c.946C>T	p.Leu316Phe	missense_variant	Exon 4 of 4	1	NM_000916.4	ENSP00000324270.2		P30559
CAV3	ENST00000472766.1 link	n.155+19211G>A		intron_variant	Intron 1 of 2	2

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000479

AC:

AN:

1461882

Hom.:

Cov.:

AF XY:

0.00000550

AC XY:

AN XY:

727244

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33480

American (AMR)

AF:

0.00

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26134

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.00

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53416

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00000629

AC:

AN:

1112006

Other (OTH)

AF:

0.00

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.446

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00000756

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Mar 31, 2025

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.946C>T (p.L316F) alteration is located in exon 4 (coding exon 2) of the OXTR gene. This alteration results from a C to T substitution at nucleotide position 946, causing the leucine (L) at amino acid position 316 to be replaced by a phenylalanine (F). 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

0.90

BayesDel_addAF

Pathogenic

0.23

BayesDel_noAF

Uncertain

0.10

CADD

Pathogenic

(source)

DANN

Pathogenic

1.0

DEOGEN2

Uncertain

0.53

Eigen

Pathogenic

0.74

Eigen_PC

Pathogenic

0.70

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Pathogenic

0.99

M_CAP

Benign

0.061

MetaRNN

Pathogenic

0.86

MetaSVM

Uncertain

0.12

MutationAssessor

Pathogenic

3.3

PhyloP100

3.9

PrimateAI

Uncertain

0.77

PROVEAN

Uncertain

-3.3

REVEL

Uncertain

0.61

Sift

Pathogenic

0.0

Sift4G

Uncertain

0.0030

Polyphen

1.0

Vest4

0.75

MutPred

0.71

Gain of catalytic residue at L316 (P = 0.0458);

MVP

0.84

MPC

1.6

ClinPred

0.99

GERP RS

4.8

Varity_R

0.90

gMVP

0.77

Mutation Taster

=31/69

disease causing

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.020

Details are displayed if max score is > 0.2

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

Publications

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3-8753201-G-A

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over