rs397515451

chr14-34713546-C-T

Variant summary

Our verdict is Likely pathogenic. Variant got 8 ACMG points: 8P and 0B. PM1 PM2 PP3_Strong

The NM_138638.5(CFL2):c.19G>A(p.Val7Met) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Synonymous variant affecting the same amino acid position (i.e. V7V) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 33)
• Consequence: CFL2 NM_138638.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter P:1 U:1
• Conservation: PhyloP100: 7.81

Genes affected

CFL2 (HGNC:1875): (cofilin 2) This gene encodes an intracellular protein that is involved in the regulation of actin-filament dynamics. This protein is a major component of intranuclear and cytoplasmic actin rods. It can bind G- and F-actin in a 1:1 ratio of cofilin to actin, and it reversibly controls actin polymerization and depolymerization in a pH-dependent manner. Mutations in this gene cause nemaline myopathy type 7, a form of congenital myopathy. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jul 2009]

ACMG classification

Verdict is Likely_pathogenic. Variant got 8 ACMG points.

• PM1: In a chain Cofilin-2 (size 164) in uniprot entity COF2_HUMAN there are 6 pathogenic changes around while only 0 benign (100%) in NM_138638.5
• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.945

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CFL2	NM_138638.5	c.19G>A	p.Val7Met	missense_variant	2/4	ENST00000298159.11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CFL2	ENST00000298159.11	c.19G>A	p.Val7Met	missense_variant	2/4	1	NM_138638.5	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Pathogenic:1 Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Nemaline myopathy 7 Pathogenic:1 Uncertain:1

Pathogenic, no assertion criteria provided	literature only	OMIM	Jul 01, 2012	- -
Uncertain significance, criteria provided, single submitter	curation	SIB Swiss Institute of Bioinformatics	Apr 16, 2018	This variant is interpreted as a Uncertain Significance, for Nemaline myopathy 7, Autosomal Recessive inheritance. The following ACMG Tag(s) were applied: PM2 => Absent from controls (or at extremely low frequency if recessive) in Exome Sequencing Project, 1000 Genomes Project, or Exome Aggregation Consortium. PP3 => Multiple lines of computational evidence support a deleterious effect on the gene or gene product. PP4 => Patients phenotype or family history is highly specific for a disease with a single genetic etiology. PP1 => Cosegregation with disease in multiple affected family members in a gene definitively known to cause the disease (PMID:22560515). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.44	D
BayesDel_noAF	Pathogenic	0.40
Cadd	Pathogenic	27
Dann	Uncertain	1.0
DEOGEN2	Uncertain	0.48	T;T
Eigen	Pathogenic	0.88
Eigen_PC	Pathogenic	0.83
FATHMM_MKL	Uncertain	0.92	D
M_CAP	Uncertain	0.26	D
MetaRNN	Pathogenic	0.94	D;D
MetaSVM	Uncertain	0.70	D
MutationAssessor	Pathogenic	3.4	M;M
MutationTaster	Benign	1.0	D;D;D;D
PrimateAI	Pathogenic	0.89	D
PROVEAN	Uncertain	-2.6	D;D
REVEL	Pathogenic	0.89
Sift	Uncertain	0.0010	D;D
Sift4G	Uncertain	0.0020	D;D
Polyphen		1.0	D;D
Vest4		0.92
MutPred		0.80		Gain of disorder (P = 0.0311);Gain of disorder (P = 0.0311);
MVP		0.95
MPC		1.5
ClinPred		0.99	D
GERP RS		5.3
Varity_R		0.51
gMVP		0.92

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

Publications

LitVar

Other links and lift over

dbSNP: rs397515451; hg19: chr14-35182752;