2-151692103-G-C

Variant names:

• chr2-151692103-G-C
• rs750276279
• NM_001164507.2:c.2062C>G

Variant summary

Our verdict is Likely benign. The variant received -1 ACMG points: 0P and 1B. BP6

The NM_001164507.2(NEB):​c.2062C>G​(p.Pro688Ala) variant causes a missense change. The variant allele was found at a frequency of 0.0000123 in 1,461,664 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P688S) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.000012 (0 hom.)
• Consequence: NEB NM_001164507.2 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:3 B:1
• Conservation: PhyloP100: 4.64
• Publications: 2 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]

NEB Gene-Disease associations (from GenCC):

• nemaline myopathy 2

  Inheritance: AR, AD Classification: DEFINITIVE, STRONG, LIMITED Submitted by: ClinGen, Labcorp Genetics (formerly Invitae), Myriad Women’s Health, G2P, Ambry Genetics
• childhood-onset nemaline myopathy

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• intermediate nemaline myopathy

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• typical nemaline myopathy

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• lethal multiple pterygium syndrome

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• severe congenital nemaline myopathy

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Likely_benign. The variant received -1 ACMG points.

• BP6: Variant 2-151692103-G-C is Benign according to our data. Variant chr2-151692103-G-C is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 576848.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001164507.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	NEB	NM_001164507.2	MANE Plus Clinical	c.2062C>G	p.Pro688Ala	missense	Exon 22 of 182	NP_001157979.2
	NEB	NM_001164508.2	MANE Select	c.2062C>G	p.Pro688Ala	missense	Exon 22 of 182	NP_001157980.2
	NEB	NM_001271208.2		c.2062C>G	p.Pro688Ala	missense	Exon 22 of 183	NP_001258137.2

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	NEB	ENST00000397345.8	TSL:5 MANE Select	c.2062C>G	p.Pro688Ala	missense	Exon 22 of 182	ENSP00000380505.3
	NEB	ENST00000427231.7	TSL:5 MANE Plus Clinical	c.2062C>G	p.Pro688Ala	missense	Exon 22 of 182	ENSP00000416578.2
	NEB	ENST00000489048.1	TSL:1	n.961C>G		non_coding_transcript_exon	Exon 10 of 12

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.0000723 AC: 18 AN: 249040 AF XY: 0.0000666

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.000521

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000123 AC: 18 AN: 1461664 Hom.: 0 Cov.: 31 AF XY: 0.0000110 AC XY: 8 AN XY: 727114

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.000402 AC: 18 AN: 44722

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26132

East Asian (EAS) AF: 0.00 AC: 0 AN: 39688

South Asian (SAS) AF: 0.00 AC: 0 AN: 86256

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53400

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1111846

Other (OTH) AF: 0.00 AC: 0 AN: 60372

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.0000227

ExAC AF: 0.0000248 AC: 3

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:3 Benign:1

Revision: criteria provided, conflicting classifications

Submissions by phenotype

Nemaline myopathy 2 Uncertain:1 Benign:1

Aug 26, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Nov 11, 2019

Natera, Inc.

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: clinical testing

Inborn genetic diseases Uncertain:1

Apr 04, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.2062C>G (p.P688A) alteration is located in exon 22 (coding exon 20) of the NEB gene. This alteration results from a C to G substitution at nucleotide position 2062, causing the proline (P) at amino acid position 688 to be replaced by an alanine (A). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear.

not provided Uncertain:1

Jun 03, 2024

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Has not been previously published as pathogenic or benign to our knowledge

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.25
BayesDel_addAF	Benign	-0.34	T
BayesDel_noAF	Benign	-0.39
CADD	Benign	23
DANN	Benign	0.92
DEOGEN2	Benign	0.10	T
Eigen	Uncertain	0.35
Eigen_PC	Uncertain	0.42
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Uncertain	0.94	D
M_CAP	Benign	0.021	T
MetaRNN	Uncertain	0.59	D
MetaSVM	Benign	-1.2	T
MutationAssessor	Uncertain	2.5	M
PhyloP100		4.6
PrimateAI	Uncertain	0.49	T
PROVEAN	Uncertain	-2.6	D
REVEL	Benign	0.19
Sift	Benign	0.61	T
Sift4G	Benign	0.11	T
Polyphen		0.77	P
Vest4		0.66
MutPred		0.72		Gain of helix (P = 0.0325)
MVP		0.47
MPC		0.33
ClinPred		0.26	T
GERP RS		6.0
Varity_R		0.12
gMVP		0.16
Mutation Taster		=86/14	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.030		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: rs750276279; hg19: chr2-152548617;