1-77916114-A-T

Variant names:

• chr1-77916114-A-T
• rs780371936
• NM_144573.4:c.8A>T

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_144573.4(NEXN):​c.8A>T​(p.Asp3Val) variant causes a missense change. The variant allele was found at a frequency of 0.00000275 in 1,455,446 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000027 (0 hom.)
• Consequence: NEXN NM_144573.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:2
• Conservation: PhyloP100: 5.94
• 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: STRONG 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: Labcorp Genetics (formerly Invitae), PanelApp Australia

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

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

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	NEXN	NM_144573.4	MANE Select	c.8A>T	p.Asp3Val	missense	Exon 2 of 13	NP_653174.3	Q0ZGT2-1
	NEXN	NM_001172309.2		c.8A>T	p.Asp3Val	missense	Exon 2 of 12	NP_001165780.1	Q0ZGT2-4

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	NEXN	ENST00000334785.12	TSL:1 MANE Select	c.8A>T	p.Asp3Val	missense	Exon 2 of 13	ENSP00000333938.7	Q0ZGT2-1
	NEXN	ENST00000401035.7	TSL:1	c.8A>T	p.Asp3Val	missense	Exon 2 of 9	ENSP00000383814.3	E7ETM8
	NEXN	ENST00000951152.1		c.8A>T	p.Asp3Val	missense	Exon 3 of 14	ENSP00000621211.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000275 AC: 4 AN: 1455446 Hom.: 0 Cov.: 28 AF XY: 0.00000414 AC XY: 3 AN XY: 724110

African (AFR) AF: 0.00 AC: 0 AN: 33302

American (AMR) AF: 0.00 AC: 0 AN: 44566

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25906

East Asian (EAS) AF: 0.00 AC: 0 AN: 39288

South Asian (SAS) AF: 0.00 AC: 0 AN: 85716

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 52764

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5560

European-Non Finnish (NFE) AF: 0.00000361 AC: 4 AN: 1108340

Other (OTH) AF: 0.00 AC: 0 AN: 60004

GnomAD4 genome Cov.: 33

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

TwinsUK AF: 0.000270 AC: 1

ALSPAC AF: 0.00 AC: 0

ClinVar

ClinVar submissions as Germline

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	Cardiovascular phenotype (1)
-	1	-	NEXN-related disorder (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.74
BayesDel_addAF	Pathogenic	0.22	D
BayesDel_noAF	Uncertain	0.080
CADD	Pathogenic	27
DANN	Uncertain	0.99
DEOGEN2	Benign	0.019	T
Eigen	Uncertain	0.60
Eigen_PC	Uncertain	0.57
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Benign	0.84	T
M_CAP	Uncertain	0.19	D
MetaRNN	Uncertain	0.51	D
MetaSVM	Uncertain	-0.051	T
MutationAssessor	Uncertain	2.4	M
PhyloP100		5.9
PrimateAI	Uncertain	0.66	T
PROVEAN	Benign	-0.45	N
REVEL	Uncertain	0.37
Sift	Pathogenic	0.0	D
Sift4G	Benign	0.14	T
Polyphen		1.0	D
Vest4		0.74
MutPred		0.28		Gain of MoRF binding (P = 0.0245)
MVP		0.90
MPC		0.31
ClinPred		0.86	D
GERP RS		4.6
Varity_R		0.24
gMVP		0.46
Mutation Taster		=61/39	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs780371936; hg19: chr1-78381799;