Genetic Variant NBEAL2:p.Asn1568Lys (chr3-47001748-C-A) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_015175.3(NBEAL2):c.4704C>A(p.Asn1568Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,588 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 17/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. N1568N) has been classified as Benign.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

NBEAL2
NM_015175.3 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -4.83

Publications

0 publications found

Variant links:

Genes affected

NBEAL2 (HGNC:31928): (neurobeachin like 2) The protein encoded by this gene contains a beige and Chediak-Higashi (BEACH) domain and multiple WD40 domains, and may play a role in megakaryocyte alpha-granule biogenesis. Mutations in this gene are a cause of gray platelet syndrome. [provided by RefSeq, Dec 2011]

NBEAL2 Gene-Disease associations (from GenCC):

gray platelet syndrome
Inheritance: AR, AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: ClinGen, Orphanet, Labcorp Genetics (formerly Invitae)

NBEAL2 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.20352167).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NBEAL2	NM_015175.3 link	c.4704C>A	p.Asn1568Lys	missense_variant	Exon 30 of 54	ENST00000450053.8	NP_055990.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein
NBEAL2	ENST00000450053.8 link	c.4704C>A	p.Asn1568Lys	missense_variant	Exon 30 of 54	2	NM_015175.3	ENSP00000415034.2
NBEAL2	ENST00000416683.5 link	c.2565C>A	p.Asn855Lys	missense_variant	Exon 16 of 40	1		ENSP00000410405.1
NBEAL2	ENST00000651747.1 link	c.4602C>A	p.Asn1534Lys	missense_variant	Exon 29 of 53			ENSP00000499216.1
NBEAL2	ENST00000475689.1 link	n.549C>A		non_coding_transcript_exon_variant	Exon 2 of 3	2

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461588

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

727064

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33480

American (AMR)

AF:

0.00

AC:

AN:

44718

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.00

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53298

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

8.99e-7

AC:

AN:

1111862

Other (OTH)

AF:

0.00

AC:

AN:

60368

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.525

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.24

BayesDel_addAF

Benign

-0.20

BayesDel_noAF

Benign

-0.53

CADD

Benign

0.54

(source)

DANN

Benign

0.97

DEOGEN2

Benign

0.031

Eigen

Benign

-1.3

Eigen_PC

Benign

-1.4

FATHMM_MKL

Benign

0.22

LIST_S2

Uncertain

0.89

M_CAP

Benign

0.030

MetaRNN

Benign

0.20

MetaSVM

Benign

-0.88

MutationAssessor

Benign

1.4

PhyloP100

-4.8

PrimateAI

Benign

0.40

PROVEAN

Benign

-2.0

REVEL

Benign

0.20

Sift

Benign

0.16

Polyphen

0.97

Vest4

0.48

MutPred

0.36

Gain of ubiquitination at N1568 (P = 0.0238);

MVP

0.26

MPC

0.24

ClinPred

0.95

GERP RS

-6.9

PromoterAI

0.022

Neutral

(source)

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.15

gMVP

0.086

Mutation Taster

=77/23

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over