1-6440984-C-A

Variant names:

• chr1-6440984-C-A
• NM_031475.3:c.909C>A
• ESPN p.Arg303Arg

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP7

The NM_031475.3(ESPN):​c.909C>A​(p.Arg303Arg) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. R303R) has been classified as Benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: ESPN NM_031475.3 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.998
• Publications: 0 publications found

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: G2P, Ambry Genetics, Labcorp Genetics (formerly Invitae)
• 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)

ACMG classification

Our verdict: Likely_benign. The variant received -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.49).
• BP7: Synonymous conserved (PhyloP=-0.998 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_031475.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ESPN	NM_031475.3	MANE Select	c.909C>A	p.Arg303Arg	synonymous	Exon 5 of 13	NP_113663.2	B1AK53-1
	ESPN	NM_001367474.1		c.909C>A	p.Arg303Arg	synonymous	Exon 5 of 15	NP_001354403.1
	ESPN	NM_001367473.1		c.909C>A	p.Arg303Arg	synonymous	Exon 5 of 14	NP_001354402.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ESPN	ENST00000645284.1	MANE Select	c.909C>A	p.Arg303Arg	synonymous	Exon 5 of 13	ENSP00000496593.1	B1AK53-1
	ESPN	ENST00000636330.1	TSL:5	c.909C>A	p.Arg303Arg	synonymous	Exon 5 of 11	ENSP00000490186.1	A0A1B0GUN9
	ESPN	ENST00000418286.1	TSL:3	c.264C>A	p.Arg88Arg	synonymous	Exon 3 of 5	ENSP00000401793.1	Q5JYL1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 37

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.49
CADD	Benign	7.5
DANN	Benign	0.94
PhyloP100		-1.0
Mutation Taster		=100/0	polymorphism

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

hg19: chr1-6501044;