11-64607651-C-T

Position:

• chr11-64607651-C-T

Variant summary

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

The NM_015080.4(NRXN2):​c.4684G>A​(p.Ala1562Thr) variant causes a missense change involving the alteration of a 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.

• Frequency: Genomes: not found (cov: 30)
• Consequence: NRXN2 NM_015080.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.52

Genes affected

NRXN2 (HGNC:8009): (neurexin 2) This gene encodes a member of the neurexin gene family. The products of these genes function as cell adhesion molecules and receptors in the vertebrate nervous system. These genes utilize two promoters. The majority of transcripts are produced from the upstream promoter and encode alpha-neurexin isoforms while a smaller number of transcripts are produced from the downstream promoter and encode beta-neuresin isoforms. The alpha-neurexins contain epidermal growth factor-like (EGF-like) sequences and laminin G domains, and have been shown to interact with neurexophilins. The beta-neurexins lack EGF-like sequences and contain fewer laminin G domains than alpha-neurexins. Alternative splicing and the use of alternative promoters may generate thousands of transcript variants (PMID: 12036300, PMID: 11944992).[provided by RefSeq, Jun 2010]

NRXN2 (HGNC:):

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=0.30612946).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
NRXN2	NM_015080.4	c.4684G>A	p.Ala1562Thr	missense_variant	23/23	ENST00000265459.11	NP_055895.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
NRXN2	ENST00000265459.11	c.4684G>A	p.Ala1562Thr	missense_variant	23/23	5	NM_015080.4	ENSP00000265459.5
NRXN2	ENST00000704782.1	c.4693G>A	p.Ala1565Thr	missense_variant	22/22			ENSP00000516031.1
NRXN2	ENST00000704781.1	c.4262-151G>A		intron_variant				ENSP00000516029.1

Frequencies

GnomAD3 genomes Cov.: 30

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 30

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Sep 30, 2024

The c.4684G>A (p.A1562T) alteration is located in exon 23 (coding exon 22) of the NRXN2 gene. This alteration results from a G to A substitution at nucleotide position 4684, causing the alanine (A) at amino acid position 1562 to be replaced by a threonine (T). 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	Uncertain	0.50
BayesDel_addAF	Benign	-0.00055	T
BayesDel_noAF	Benign	-0.24
CADD	Uncertain	24
DANN	Uncertain	1.0
DEOGEN2	Benign	0.32	T;T;.;T;.
Eigen	Uncertain	0.22
Eigen_PC	Benign	0.18
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.96	D;.;D;D;D
M_CAP	Uncertain	0.22	D
MetaRNN	Benign	0.31	T;T;T;T;T
MetaSVM	Uncertain	-0.19	T
MutationAssessor	Benign	1.4	.;L;.;L;.
PrimateAI	Pathogenic	0.87	D
PROVEAN	Benign	-2.1	N;N;N;N;N
REVEL	Benign	0.22
Sift	Uncertain	0.0020	D;D;D;D;D
Sift4G	Uncertain	0.048	D;D;D;D;D
Polyphen		1.0	D;B;P;B;.
Vest4		0.33
MutPred		0.076		.;Gain of glycosylation at A1562 (P = 0.007);.;Gain of glycosylation at A1562 (P = 0.007);.;
MVP		0.68
MPC		1.0
ClinPred		0.92	D
GERP RS		3.4
Varity_R		0.13
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: rs1254204827; hg19: chr11-64375123;