rs199957886

Variant names:

• chr2-151508079-T-C
• rs199957886
• NM_001164507.2:c.23377A>G

Your query was ambiguous. Multiple possible variants found:

• chr2-151508079-T-C
• chr2-151508079-T-G

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 3P and 0B. PM2 PP3

The NM_001164507.2(NEB):​c.23377A>G​(p.Met7793Val) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,457,424 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. M7793T) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: NEB NM_001164507.2 missense
• Clinical Significance: Uncertain significance no assertion criteria provided U:1
• Conservation: PhyloP100: 7.48
• Publications: 0 publications found

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

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.752

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NEB	NM_001164507.2	c.23377A>G	p.Met7793Val	missense_variant	Exon 162 of 182	ENST00000427231.7	NP_001157979.2
NEB	NM_001164508.2	c.23377A>G	p.Met7793Val	missense_variant	Exon 162 of 182	ENST00000397345.8	NP_001157980.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
NEB	ENST00000397345.8	c.23377A>G	p.Met7793Val	missense_variant	Exon 162 of 182	5	NM_001164508.2	ENSP00000380505.3
NEB	ENST00000427231.7	c.23377A>G	p.Met7793Val	missense_variant	Exon 162 of 182	5	NM_001164507.2	ENSP00000416578.2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1457424 Hom.: 0 Cov.: 30 AF XY: 0.00 AC XY: 0 AN XY: 724550

African (AFR) AF: 0.00 AC: 0 AN: 33430

American (AMR) AF: 0.00 AC: 0 AN: 44338

Ashkenazi Jewish (ASJ) AF: 0.0000386 AC: 1 AN: 25910

East Asian (EAS) AF: 0.0000252 AC: 1 AN: 39652

South Asian (SAS) AF: 0.00 AC: 0 AN: 85208

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53198

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5762

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1109720

Other (OTH) AF: 0.00 AC: 0 AN: 60206

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: no assertion criteria provided

Submissions by phenotype

Nemaline myopathy 2 Uncertain:1

Apr 11, 2025

Natera, Inc.

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: clinical testing

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.12
BayesDel_addAF	Benign	0.0057	T
BayesDel_noAF	Benign	-0.23
CADD	Benign	21
DANN	Uncertain	0.98
DEOGEN2	Benign	0.046	.;.;T;.;T;T;.;.
Eigen	Pathogenic	0.70
Eigen_PC	Pathogenic	0.70
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.90	D;D;T;D;D;D;.;.
M_CAP	Benign	0.041	D
MetaRNN	Pathogenic	0.75	D;D;D;D;D;D;D;D
MetaSVM	Benign	-0.73	T
MutationAssessor	Benign	1.8	L;.;.;.;L;.;.;.
PhyloP100		7.5
PrimateAI	Uncertain	0.60	T
PROVEAN	Benign	-1.9	N;N;.;N;N;N;.;.
REVEL	Benign	0.18
Sift	Benign	0.16	T;T;.;T;T;T;.;.
Sift4G	Uncertain	0.0040	D;D;D;D;D;D;D;D
Polyphen		0.99	.;.;.;.;D;.;.;.
Vest4		0.63
MutPred		0.67		Gain of phosphorylation at Y6094 (P = 0.0762);.;.;.;Gain of phosphorylation at Y6094 (P = 0.0762);.;.;.;
MVP		0.48
MPC		0.32
ClinPred		0.87	D
GERP RS		5.3
PromoterAI		-0.018	Neutral
Varity_R		0.32
gMVP		0.18
Mutation Taster		=75/25	polymorphism

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

Other links and lift over

dbSNP: rs199957886; hg19: chr2-152364593;