1-77917581-T-C

Position:

• chr1-77917581-T-C

Variant summary

Our verdict is Likely benign. Variant got -5 ACMG points: 0P and 5B. BP4 BS2

The NM_144573.4(NEXN):​c.43T>C​(p.Ser15Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000548 in 1,460,798 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 Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000055 (0 hom.)
• Consequence: NEXN NM_144573.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.25

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]

ACMG classification

Verdict is Likely_benign. Variant got -5 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.27834833).
• BS2: High AC in GnomAdExome4 at 8 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
NEXN	NM_144573.4	c.43T>C	p.Ser15Pro	missense_variant	3/13	ENST00000334785.12	NP_653174.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
NEXN	ENST00000334785.12	c.43T>C	p.Ser15Pro	missense_variant	3/13	1	NM_144573.4	ENSP00000333938	P3
NEXN	ENST00000401035.7	c.28-379T>C		intron_variant		1		ENSP00000383814
NEXN	ENST00000440324.5	c.43T>C	p.Ser15Pro	missense_variant	3/10	5		ENSP00000411902
NEXN	ENST00000330010.12	c.28-379T>C		intron_variant		2		ENSP00000327363	A1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000548 AC: 8 AN: 1460798 Hom.: 0 Cov.: 31 AF XY: 0.00000550 AC XY: 4 AN XY: 726708

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000720

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Cardiomyopathy Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

CHEO Genetics Diagnostic Laboratory, Children's Hospital of Eastern Ontario

Mar 16, 2023

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.42
BayesDel_addAF	Uncertain	0.10	D
BayesDel_noAF	Benign	-0.090
CADD	Uncertain	23
DANN	Uncertain	1.0
DEOGEN2	Benign	0.013	T;T
Eigen	Uncertain	0.30
Eigen_PC	Uncertain	0.38
FATHMM_MKL	Uncertain	0.86	D
LIST_S2	Benign	0.85	D;T
M_CAP	Benign	0.038	D
MetaRNN	Benign	0.28	T;T
MetaSVM	Benign	-0.64	T
MutationAssessor	Benign	1.9	L;.
MutationTaster	Benign	1.0	D;N;N;N
PrimateAI	Uncertain	0.58	T
PROVEAN	Benign	-1.5	N;N
REVEL	Benign	0.19
Sift	Uncertain	0.0090	D;D
Sift4G	Uncertain	0.044	D;T
Polyphen		0.67	P;.
Vest4		0.50
MutPred		0.22		Gain of loop (P = 0.0312);Gain of loop (P = 0.0312);
MVP		0.75
MPC		0.17
ClinPred		0.85	D
GERP RS		5.5
Varity_R		0.44
gMVP		0.22

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr1-78383266;