NM_144573.4:c.1773A>C

Variant names:

• chr1-77942574-A-C
• rs727503345
• NM_144573.4:c.1773A>C

Variant summary

Our verdict is Likely benign. The variant received -1 ACMG points: 2P and 3B. PM2 BP4_Moderate BP7

The NM_144573.4(NEXN):​c.1773A>C​(p.Thr591Thr) 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. T591T) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: NEXN NM_144573.4 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.485
• Publications: 0 publications found

Genes affected

NEXN (HGNC:29557): (nexilin F-actin binding protein) This gene encodes a filamentous actin-binding protein that may function in cell adhesion and migration. Mutations in this gene have been associated with dilated cardiomyopathy, also known as CMD1CC. Alternatively spliced transcript variants have been described.[provided by RefSeq, Feb 2010]

NEXN Gene-Disease associations (from GenCC):

• dilated cardiomyopathy

  Inheritance: AD Classification: MODERATE Submitted by: ClinGen
• familial isolated dilated cardiomyopathy

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• dilated cardiomyopathy 1CC

  Inheritance: AD Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae)
• hypertrophic cardiomyopathy

  Inheritance: AD Classification: LIMITED Submitted by: ClinGen
• hypertrophic cardiomyopathy 20

  Inheritance: AD Classification: LIMITED Submitted by: PanelApp Australia, Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Likely_benign. The variant received -1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (REVEL=0.116).
• BP7: Synonymous conserved (PhyloP=0.485 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_144573.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	NEXN	NM_144573.4	MANE Select	c.1773A>C	p.Thr591Thr	synonymous	Exon 13 of 13	NP_653174.3
	NEXN	NM_001172309.2		c.1581A>C	p.Thr527Thr	synonymous	Exon 12 of 12	NP_001165780.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	NEXN	ENST00000334785.12	TSL:1 MANE Select	c.1773A>C	p.Thr591Thr	synonymous	Exon 13 of 13	ENSP00000333938.7
	NEXN	ENST00000342754.5	TSL:1	c.1470A>C	p.Thr490Thr	synonymous	Exon 9 of 10	ENSP00000343928.5
	NEXN	ENST00000951152.1		c.1773A>C	p.Thr591Thr	synonymous	Exon 14 of 14	ENSP00000621211.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.92
CADD	Benign	2.4
DANN	Benign	0.46
PhyloP100		0.48
Mutation Taster		=99/1	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

Other links and lift over

dbSNP: rs727503345; hg19: chr1-78408259;