1-77935813-T-G

Variant names:

• chr1-77935813-T-G
• rs201019553
• NM_144573.4:c.1252-10T>G

Variant summary

Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B. BP4_Strong BP6_Very_Strong BS1 BS2

The NM_144573.4(NEXN):​c.1252-10T>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000157 in 1,608,226 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

• Frequency:
  • Genomes: 𝑓 0.00082 (0 hom., cov: 33)
  • Exomes 𝑓: 0.000087 (0 hom.)
• Consequence: NEXN NM_144573.4 intron
• Scores: Splicing: ADA: 0.1620
• Clinical Significance: Benign/Likely benign criteria provided, multiple submitters, no conflicts B:5
• Conservation: PhyloP100: 0.697
• Publications: 1 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: Benign. The variant received -20 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.74).
• BP6: Variant 1-77935813-T-G is Benign according to our data. Variant chr1-77935813-T-G is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 178878.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BS1: Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.000821 (125/152296) while in subpopulation AFR AF = 0.00289 (120/41568). AF 95% confidence interval is 0.00247. There are 0 homozygotes in GnomAd4. There are 56 alleles in the male GnomAd4 subpopulation. Median coverage is 33. This position passed quality control check.
• BS2: High AC in GnomAd4 at 125 AD gene.

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.1252-10T>G		intron	N/A	NP_653174.3
	NEXN	NM_001172309.2		c.1060-10T>G		intron	N/A	NP_001165780.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	NEXN	ENST00000334785.12	TSL:1 MANE Select	c.1252-10T>G		intron	N/A	ENSP00000333938.7
	NEXN	ENST00000342754.5	TSL:1	c.949-10T>G		intron	N/A	ENSP00000343928.5
	NEXN	ENST00000951152.1		c.1252-10T>G		intron	N/A	ENSP00000621211.1

Frequencies

GnomAD3 genomes AF: 0.000821 AC: 125 AN: 152178 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.00290

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000196

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.000957

GnomAD2 exomes AF: 0.000199 AC: 49 AN: 246260 AF XY: 0.000156

Gnomad AFR exome AF: 0.00315

Gnomad AMR exome AF: 0.0000581

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000872 AC: 127 AN: 1455930 Hom.: 0 Cov.: 30 AF XY: 0.0000787 AC XY: 57 AN XY: 724596

African (AFR) AF: 0.00342 AC: 114 AN: 33368

American (AMR) AF: 0.0000895 AC: 4 AN: 44696

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26100

East Asian (EAS) AF: 0.00 AC: 0 AN: 39650

South Asian (SAS) AF: 0.00 AC: 0 AN: 85920

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 52934

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4280

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1108894

Other (OTH) AF: 0.000150 AC: 9 AN: 60088

GnomAD4 genome AF: 0.000821 AC: 125 AN: 152296 Hom.: 0 Cov.: 33 AF XY: 0.000752 AC XY: 56 AN XY: 74468

African (AFR) AF: 0.00289 AC: 120 AN: 41568

American (AMR) AF: 0.000196 AC: 3 AN: 15298

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5184

South Asian (SAS) AF: 0.00 AC: 0 AN: 4818

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10612

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 68026

Other (OTH) AF: 0.000947 AC: 2 AN: 2112

Alfa AF: 0.000532 Hom.: 0

Bravo AF: 0.000941

ClinVar

ClinVar submissions as Germline

Significance: Benign/Likely benign

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	-	1	Cardiomyopathy (1)
-	-	1	Dilated cardiomyopathy 1CC;C3151267:Hypertrophic cardiomyopathy 20 (1)
-	-	1	NEXN-related disorder (1)
-	-	1	not provided (1)
-	-	1	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.74
CADD	Benign	12
DANN	Benign	0.78
PhyloP100		0.70

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.16
dbscSNV1_RF	Benign	0.55
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: rs201019553; hg19: chr1-78401498;