3-46989279-C-T

Position:

• chr3-46989279-C-T

Variant summary

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

The NM_015175.3(NBEAL2):​c.371C>T​(p.Pro124Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,458,688 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: NBEAL2 NM_015175.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.0110

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]

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=0.08317527).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
NBEAL2	NM_015175.3	c.371C>T	p.Pro124Leu	missense_variant	5/54	ENST00000450053.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
NBEAL2	ENST00000450053.8	c.371C>T	p.Pro124Leu	missense_variant	5/54	2	NM_015175.3	P2
NBEAL2	ENST00000651747.1	c.350C>T	p.Pro117Leu	missense_variant	5/53			A2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1458688 Hom.: 0 Cov.: 33 AF XY: 0.00 AC XY: 0 AN XY: 725376

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: 0.00000180

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Inborn genetic diseases Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Nov 21, 2022

The c.371C>T (p.P124L) alteration is located in exon 5 (coding exon 5) of the NBEAL2 gene. This alteration results from a C to T substitution at nucleotide position 371, causing the proline (P) at amino acid position 124 to be replaced by a leucine (L). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.066
BayesDel_addAF	Benign	-0.22	T
BayesDel_noAF	Benign	-0.55
CADD	Benign	3.5
DANN	Benign	0.75
DEOGEN2	Benign	0.026	T
Eigen	Benign	-0.88
Eigen_PC	Benign	-0.95
FATHMM_MKL	Benign	0.14	N
LIST_S2	Benign	0.60	T
M_CAP	Benign	0.023	T
MetaRNN	Benign	0.083	T
MetaSVM	Benign	-0.98	T
MutationAssessor	Uncertain	2.1	M
MutationTaster	Benign	1.0	N;N;N
PrimateAI	Benign	0.27	T
PROVEAN	Benign	-1.9	N
REVEL	Benign	0.069
Sift	Benign	0.10	T
Polyphen		0.0	B
Vest4		0.18
MutPred		0.25		Loss of disorder (P = 0.0167);
MVP		0.18
MPC		0.19
ClinPred		0.069	T
GERP RS		1.2
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.2
Varity_R		0.12
gMVP		0.14

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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: rs1225527977; hg19: chr3-47030769;