2-151490039-G-C

Position:

• chr2-151490039-G-C

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_001164507.2(NEB):​c.25336C>G​(p.Arg8446Gly) variant causes a missense 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. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R8446Q) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: NEB NM_001164507.2 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.79

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 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.34798366).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
NEB	NM_001164507.2	c.25336C>G	p.Arg8446Gly	missense_variant	181/182	ENST00000427231.7
NEB	NM_001164508.2	c.25336C>G	p.Arg8446Gly	missense_variant	181/182	ENST00000397345.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
NEB	ENST00000397345.8	c.25336C>G	p.Arg8446Gly	missense_variant	181/182	5	NM_001164508.2	P5
NEB	ENST00000427231.7	c.25336C>G	p.Arg8446Gly	missense_variant	181/182	5	NM_001164507.2	A2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1461094 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 726836

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: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

Asia WGS AF: 0.000289 AC: 1 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.44
BayesDel_addAF	Pathogenic	0.19	D
BayesDel_noAF	Uncertain	0.030
CADD	Benign	22
DANN	Uncertain	1.0
DEOGEN2	Benign	0.059	.;.;T;.;T;T;.;.
Eigen	Uncertain	0.26
Eigen_PC	Uncertain	0.27
FATHMM_MKL	Uncertain	0.86	D
LIST_S2	Uncertain	0.89	D;D;D;D;D;T;.;.
M_CAP	Benign	0.062	D
MetaRNN	Benign	0.35	T;T;T;T;T;T;T;T
MetaSVM	Benign	-1.2	T
MutationAssessor	Uncertain	2.1	M;.;.;.;M;.;.;.
MutationTaster	Benign	0.98	D;D;D;D;N;N
PrimateAI	Uncertain	0.64	T
PROVEAN	Uncertain	-3.6	D;D;.;D;D;D;.;.
REVEL	Benign	0.21
Sift	Pathogenic	0.0	D;D;.;D;D;D;.;.
Sift4G	Uncertain	0.0020	D;D;D;D;D;D;D;D
Polyphen		0.0060	.;.;.;.;B;.;.;.
Vest4		0.64
MutPred		0.26		Gain of glycosylation at S6591 (P = 0.072);.;.;.;Gain of glycosylation at S6591 (P = 0.072);.;.;.;
MVP		0.46
MPC		0.19
ClinPred		0.99	D
GERP RS		3.2
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.67
gMVP		0.33

Splicing

Name	Calibrated prediction	Score	Prediction
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

Publications

LitVar

Other links and lift over

dbSNP: rs200731870; hg19: chr2-152346553;