2-151506258-C-T

Position:

• chr2-151506258-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001164507.2(NEB):​c.23557G>A​(p.Val7853Ile) variant causes a missense, splice region 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. 15/23 in silico tools predict a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: NEB NM_001164507.2 missense, splice_region
• Scores: Splicing: ADA: 0.9496
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.34

Genes affected

NEB (HGNC:7720): (nebulin) This gene encodes nebulin, a giant protein component of the cytoskeletal matrix that coexists with the thick and thin filaments within the sarcomeres of skeletal muscle. In most vertebrates, nebulin accounts for 3 to 4% of the total myofibrillar protein. The encoded protein contains approximately 30-amino acid long modules that can be classified into 7 types and other repeated modules. Protein isoform sizes vary from 600 to 800 kD due to alternative splicing that is tissue-, species-,and developmental stage-specific. Of the 183 exons in the nebulin gene, at least 43 are alternatively spliced, although exons 143 and 144 are not found in the same transcript. Of the several thousand transcript variants predicted for nebulin, the RefSeq Project has decided to create three representative RefSeq records. Mutations in this gene are associated with recessive nemaline myopathy. [provided by RefSeq, Sep 2009]

RIF1 (HGNC:23207): (replication timing regulatory factor 1) This gene encodes a protein that shares homology with the yeast teleomere binding protein, Rap1 interacting factor 1. This protein localizes to aberrant telomeres may be involved in DNA repair. Alternate splicing results in multiple transcript variants. [provided by RefSeq, Apr 2010]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.1913501).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
NEB	NM_001164507.2	c.23557G>A	p.Val7853Ile	missense_variant, splice_region_variant	164/182	ENST00000427231.7
NEB	NM_001164508.2	c.23557G>A	p.Val7853Ile	missense_variant, splice_region_variant	164/182	ENST00000397345.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
NEB	ENST00000397345.8	c.23557G>A	p.Val7853Ile	missense_variant, splice_region_variant	164/182	5	NM_001164508.2	P5
NEB	ENST00000427231.7	c.23557G>A	p.Val7853Ile	missense_variant, splice_region_variant	164/182	5	NM_001164507.2	A2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 29

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

research

Center for Genetic Medicine Research, Children's National Medical Center

Dec 01, 2015

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.085
BayesDel_addAF	Benign	-0.12	T
BayesDel_noAF	Benign	-0.41
CADD	Benign	23
DANN	Uncertain	0.98
DEOGEN2	Benign	0.0059	.;.;T;.;T;T;.;.;T
Eigen	Uncertain	0.24
Eigen_PC	Uncertain	0.39
FATHMM_MKL	Benign	0.75	D
LIST_S2	Benign	0.82	T;T;T;T;T;T;.;.;D
M_CAP	Benign	0.043	D
MetaRNN	Benign	0.19	T;T;T;T;T;T;T;T;T
MetaSVM	Benign	-0.89	T
MutationAssessor	Benign	0.23	N;.;.;.;N;.;.;.;.
MutationTaster	Benign	1.0	D;D;D;D;D
PrimateAI	Uncertain	0.62	T
PROVEAN	Benign	-0.20	N;N;.;N;N;N;.;.;N
REVEL	Benign	0.12
Sift	Benign	0.39	T;T;.;T;T;T;.;.;T
Sift4G	Benign	0.78	T;T;T;T;T;T;T;T;.
Polyphen		0.025	.;.;.;.;B;.;.;.;.
Vest4		0.14
MutPred		0.51		Loss of ubiquitination at K6155 (P = 0.065);.;.;.;Loss of ubiquitination at K6155 (P = 0.065);.;.;.;.;
MVP		0.47
MPC		0.055
ClinPred		0.38	T
GERP RS		6.1
Varity_R		0.10
gMVP		0.43

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.95
dbscSNV1_RF	Benign	0.67
SpliceAI score (max)		0.090		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: rs878854397; hg19: chr2-152362772; COSMIC: COSV104384636;