rs183440866

chr2-50053292-C-T

Variant summary

Our verdict is Benign. Variant got -17 ACMG points: 0P and 17B. BP4_Strong BP6_Very_Strong BP7 BS1

The NM_001330078.2(NRXN1):c.4107G>A(p.Pro1369=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000861 in 1,613,900 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

• Frequency:
  • Genomes: 𝑓 0.00036 (0 hom., cov: 33)
  • Exomes 𝑓: 0.000057 (0 hom.)
• Consequence: NRXN1 NM_001330078.2 synonymous
• Clinical Significance: Likely benign criteria provided, multiple submitters, no conflicts B:2
• Conservation: PhyloP100: -1.85

Genes affected

NRXN1 (HGNC:8008): (neurexin 1) This gene encodes a single-pass type I membrane protein that belongs to the neurexin family. Neurexins are cell-surface receptors that bind neuroligins to form Ca(2+)-dependent neurexin/neuroligin complexes at synapses in the central nervous system. This complex is required for efficient neurotransmission and is involved in the formation of synaptic contacts. Three members of this gene family have been studied in detail and are estimated to generate over 3,000 variants through the use of two alternative promoters (alpha and beta) and extensive alternative splicing in each family member. Recently, a third promoter (gamma) was identified for this gene in the 3' region. Mutations in this gene are associated with Pitt-Hopkins-like syndrome-2 and may contribute to susceptibility to schizophrenia. [provided by RefSeq, Aug 2016]

ACMG classification

Verdict is Benign. Variant got -17 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.58).
• BP6: Variant 2-50053292-C-T is Benign according to our data. Variant chr2-50053292-C-T is described in ClinVar as [Likely_benign]. Clinvar id is 383233.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr2-50053292-C-T is described in Lovd as [Likely_benign].
• BP7: Synonymous conserved (PhyloP=-1.85 with no splicing effect.
• BS1: Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.000361 (55/152224) while in subpopulation AFR AF= 0.00125 (52/41538). AF 95% confidence interval is 0.000981. There are 0 homozygotes in gnomad4. There are 23 alleles in male gnomad4 subpopulation. This position pass quality control queck.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
NRXN1	NM_001330078.2	c.4107G>A	p.Pro1369=	synonymous_variant	21/23	ENST00000401669.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
NRXN1	ENST00000401669.7	c.4107G>A	p.Pro1369=	synonymous_variant	21/23	5	NM_001330078.2	A1

Frequencies

GnomAD3 genomes AF: 0.000362 AC: 55 AN: 152106 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.00126

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.000192

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.000956

GnomAD3 exomes AF: 0.0000916 AC: 23 AN: 250962 Hom.: 0 AF XY: 0.0000811 AC XY: 11 AN XY: 135668

Gnomad AFR exome AF: 0.00117

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.0000544

Gnomad SAS exome AF: 0.0000327

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000882

Gnomad OTH exome AF: 0.000163

GnomAD4 exome AF: 0.0000575 AC: 84 AN: 1461676 Hom.: 0 Cov.: 32 AF XY: 0.0000523 AC XY: 38 AN XY: 727134

Gnomad4 AFR exome AF: 0.00170

Gnomad4 AMR exome AF: 0.0000224

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.000403

Gnomad4 SAS exome AF: 0.0000232

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000450

Gnomad4 OTH exome AF: 0.0000331

GnomAD4 genome AF: 0.000361 AC: 55 AN: 152224 Hom.: 0 Cov.: 33 AF XY: 0.000309 AC XY: 23 AN XY: 74424

Gnomad4 AFR AF: 0.00125

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.000193

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.00

Gnomad4 OTH AF: 0.000946

Alfa AF: 0.000296 Hom.: 0

Bravo AF: 0.000336

Asia WGS AF: 0.000289 AC: 1 AN: 3478

EpiCase AF: 0.00

EpiControl AF: 0.0000593

ClinVar

Significance: Likely benign

Submissions summary: Benign:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Benign:1

Likely benign, criteria provided, single submitter

clinical testing

GeneDx

May 11, 2021

This variant is associated with the following publications: (PMID: 24429703) -

Pitt-Hopkins-like syndrome 2 Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Invitae

Jan 21, 2024

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.58
Cadd	Benign	0.72
Dann	Benign	0.62

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs183440866; hg19: chr2-50280430; COSMIC: COSV100640017;