Genetic Variant ESPN:p.Arg774Pro (chr1-6452092-G-C) – ACMG Classification: Uncertain_significance (4 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2PM5

The NM_031475.3(ESPN):c.2321G>C(p.Arg774Pro) variant causes a missense change. The variant allele was found at a frequency of 0.000000719 in 1,390,822 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R774Q) has been classified as Pathogenic.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 7.2e-7 ( 0 hom. )

Consequence

ESPN
NM_031475.3 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 6.58

Publications

0 publications found

Variant links:

Genes affected

ESPN (HGNC:13281): (espin) This gene encodes a multifunctional actin-bundling protein. It plays a major role in regulating the organization, dimensions, dynamics, and signaling capacities of the actin filament-rich, microvillus-type specializations that mediate sensory transduction in various mechanosensory and chemosensory cells. Mutations in this gene are associated with autosomal recessive neurosensory deafness, and autosomal dominant sensorineural deafness without vestibular involvement. [provided by RefSeq, Nov 2009]

ESPN Gene-Disease associations (from GenCC):

nonsyndromic genetic hearing loss
Inheritance: AD, AR Classification: DEFINITIVE, LIMITED Submitted by: ClinGen
autosomal recessive nonsyndromic hearing loss 36
Inheritance: AR, AD Classification: DEFINITIVE, STRONG, MODERATE, LIMITED Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), PanelApp Australia, G2P
hearing loss, autosomal recessive
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
Usher syndrome type 1
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
Usher syndrome, type 1M
Inheritance: AR, Unknown Classification: LIMITED Submitted by: G2P, Labcorp Genetics (formerly Invitae)

ESPN links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PM5

Other missense variant is known to change same aminoacid residue: Variant chr1-6452092-G-A is described in ClinVar as [Pathogenic]. Clinvar id is 4422.Status of the report is no_assertion_criteria_provided, 0 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ESPN	NM_031475.3 link	c.2321G>C	p.Arg774Pro	missense_variant	Exon 10 of 13	ENST00000645284.1	NP_113663.2	B1AK53-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ESPN	ENST00000645284.1 link	c.2321G>C	p.Arg774Pro	missense_variant	Exon 10 of 13		NM_031475.3	ENSP00000496593.1		B1AK53-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

7.19e-7

AC:

AN:

1390822

Hom.:

Cov.:

AF XY:

0.00000146

AC XY:

AN XY:

685558

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

31772

American (AMR)

AF:

0.00

AC:

AN:

36166

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25126

East Asian (EAS)

AF:

0.00

AC:

AN:

35904

South Asian (SAS)

AF:

0.00

AC:

AN:

79408

European-Finnish (FIN)

AF:

0.00

AC:

AN:

43168

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4880

European-Non Finnish (NFE)

AF:

9.29e-7

AC:

AN:

1076604

Other (OTH)

AF:

0.00

AC:

AN:

57794

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.525

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.93

BayesDel_addAF

Uncertain

0.14

BayesDel_noAF

Uncertain

-0.040

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.61

D;T;D;T;.;.;T;T

Eigen

Uncertain

0.60

Eigen_PC

Uncertain

0.55

FATHMM_MKL

Uncertain

0.94

LIST_S2

Benign

0.57

.;T;D;D;D;D;D;D

M_CAP

Pathogenic

0.72

MetaRNN

Uncertain

0.53

D;D;D;D;D;D;D;D

MetaSVM

Uncertain

0.58

MutationAssessor

Benign

2.0

M;.;M;.;.;.;.;.

PhyloP100

6.6

PrimateAI

Uncertain

0.57

PROVEAN

Uncertain

-3.7

.;.;D;D;.;.;.;.

REVEL

Uncertain

0.54

Sift

Uncertain

0.0030

.;.;D;D;.;.;.;.

Sift4G

Uncertain

0.0040

.;.;D;D;D;.;D;.

Polyphen

1.0

D;.;D;.;D;.;.;.

Vest4

0.57, 0.60, 0.59

MutPred

0.14

Gain of glycosylation at R774 (P = 0.0231);Gain of glycosylation at R774 (P = 0.0231);Gain of glycosylation at R774 (P = 0.0231);.;.;.;.;.;

MVP

0.86

MPC

0.74

ClinPred

0.99

GERP RS

4.0

PromoterAI

0.034

Neutral

(source)

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.87

gMVP

0.46

Mutation Taster

=51/49

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over