NM_031475.3:c.2253C>A

Variant names:

• chr1-6452024-C-A
• NM_031475.3:c.2253C>A
• ESPN p.Pro751Pro

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.2253C>A​(p.Pro751Pro) 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. P751P) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: ESPN NM_031475.3 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -5.89
• 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):

• autosomal recessive nonsyndromic hearing loss 36

  Inheritance: AD, AR Classification: DEFINITIVE, STRONG, MODERATE, LIMITED Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), G2P
• nonsyndromic genetic hearing loss

  Inheritance: AR, AD Classification: DEFINITIVE, LIMITED Submitted by: ClinGen
• 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=-0.53).
• BP7: Synonymous conserved (PhyloP=-5.89 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.2253C>A	p.Pro751Pro	synonymous	Exon 10 of 13	NP_113663.2	B1AK53-1
	ESPN	NM_001367474.1		c.2190C>A	p.Pro730Pro	synonymous	Exon 12 of 15	NP_001354403.1
	ESPN	NM_001367473.1		c.2163C>A	p.Pro721Pro	synonymous	Exon 11 of 14	NP_001354402.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ESPN	ENST00000645284.1	MANE Select	c.2253C>A	p.Pro751Pro	synonymous	Exon 10 of 13	ENSP00000496593.1	B1AK53-1
	ESPN	ENST00000461727.6	TSL:1	c.555C>A	p.Pro185Pro	synonymous	Exon 5 of 8	ENSP00000465308.1	B1AK53-2
	ESPN	ENST00000636330.1	TSL:5	c.2253C>A	p.Pro751Pro	synonymous	Exon 10 of 11	ENSP00000490186.1	A0A1B0GUN9

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1439504 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 714272

African (AFR) AF: 0.00 AC: 0 AN: 32964

American (AMR) AF: 0.00 AC: 0 AN: 42246

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25742

East Asian (EAS) AF: 0.00 AC: 0 AN: 38560

South Asian (SAS) AF: 0.00 AC: 0 AN: 83316

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 51168

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5628

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1100418

Other (OTH) AF: 0.00 AC: 0 AN: 59462

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.53
CADD	Benign	0.57
DANN	Benign	0.80
PhyloP100		-5.9
PromoterAI		-0.017	Neutral
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Mutation Taster		=98/2	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: chr1-6512084;