Genetic Variant PLXNB2:p.His1781Tyr (chr22-50275960-G-A) – ACMG Classification: Likely_benign (-6 pts)

Variant summary

Our verdict is Likely benign. The variant received -6 ACMG points: 0P and 6B. BP4BS1_SupportingBS2

The NM_012401.4(PLXNB2):c.5341C>T(p.His1781Tyr) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000251 in 1,612,544 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00017 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00026 ( 2 hom. )

Consequence

PLXNB2
NM_012401.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 7.37

Publications

3 publications found

Variant links:

Genes affected

PLXNB2 (HGNC:9104): (plexin B2) Members of the B class of plexins, such as PLXNB2 are transmembrane receptors that participate in axon guidance and cell migration in response to semaphorins (Perrot et al. (2002) [PubMed 12183458]).[supplied by OMIM, Mar 2008]

PLXNB2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -6 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.3095255).

BS1

Variant frequency is greater than expected in population sas. GnomAd4 allele frequency = 0.000171 (26/152284) while in subpopulation SAS AF = 0.00104 (5/4826). AF 95% confidence interval is 0.000408. There are 0 homozygotes in GnomAd4. There are 13 alleles in the male GnomAd4 subpopulation. Median coverage is 33. This position passed quality control check. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

BS2

High Homozygotes in GnomAdExome4 at 2 gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PLXNB2	NM_012401.4 link	c.5341C>T	p.His1781Tyr	missense_variant	Exon 36 of 37	ENST00000359337.9	NP_036533.2	O15031

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PLXNB2	ENST00000359337.9 link	c.5341C>T	p.His1781Tyr	missense_variant	Exon 36 of 37	5	NM_012401.4	ENSP00000352288.4		O15031

Frequencies

GnomAD3 genomes

AF:

0.000171

AC:

AN:

152166

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000724

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00104

Gnomad FIN

AF:

0.000188

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000235

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000222

AC:

AN:

247738

AF XY:

0.000289

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.000233

Gnomad NFE exome

AF:

0.000152

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000259

AC:

378

AN:

1460260

Hom.:

Cov.:

AF XY:

0.000299

AC XY:

217

AN XY:

726458

show subpopulations

African (AFR)

AF:

0.0000299

AC:

AN:

33476

American (AMR)

AF:

0.00

AC:

AN:

44706

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26120

East Asian (EAS)

AF:

0.00

AC:

AN:

39692

South Asian (SAS)

AF:

0.00137

AC:

118

AN:

86254

European-Finnish (FIN)

AF:

0.000249

AC:

AN:

52140

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.000214

AC:

238

AN:

1111748

Other (OTH)

AF:

0.000133

AC:

AN:

60356

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.446

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.000171

AC:

AN:

152284

Hom.:

Cov.:

AF XY:

0.000175

AC XY:

AN XY:

74460

show subpopulations

African (AFR)

AF:

0.0000722

AC:

AN:

41564

American (AMR)

AF:

0.00

AC:

AN:

15308

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5172

South Asian (SAS)

AF:

0.00104

AC:

AN:

4826

European-Finnish (FIN)

AF:

0.000188

AC:

AN:

10618

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000235

AC:

AN:

68006

Other (OTH)

AF:

0.00

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.523

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.000152

Hom.:

Bravo

AF:

0.000125

TwinsUK

AF:

0.00

AC:

ALSPAC

AF:

0.000259

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000237

AC:

ExAC

AF:

0.000224

AC:

EpiCase

AF:

0.000164

EpiControl

AF:

0.000178

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Aug 20, 2024

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.5341C>T (p.H1781Y) alteration is located in exon 36 (coding exon 34) of the PLXNB2 gene. This alteration results from a C to T substitution at nucleotide position 5341, causing the histidine (H) at amino acid position 1781 to be replaced by a tyrosine (Y). 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

0.21

BayesDel_addAF

Benign

-0.27

BayesDel_noAF

Benign

-0.21

CADD

Benign

(source)

DANN

Benign

0.84

DEOGEN2

Benign

0.088

T;T

Eigen

Uncertain

0.40

Eigen_PC

Uncertain

0.34

FATHMM_MKL

Uncertain

0.96

LIST_S2

Uncertain

0.91

D;.

M_CAP

Benign

0.0080

MetaRNN

Benign

0.31

T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

1.8

L;L

PhyloP100

7.4

PrimateAI

Pathogenic

0.84

PROVEAN

Benign

-0.86

N;N

REVEL

Uncertain

0.34

Sift

Benign

1.0

T;T

Sift4G

Benign

0.83

T;T

Polyphen

1.0

D;D

Vest4

0.81

MVP

0.56

MPC

2.0

ClinPred

0.10

GERP RS

4.8

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.091

gMVP

0.68

Mutation Taster

=68/32

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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22-50275960-G-A

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over