Genetic Variant PLXNB2:p.Ala1780Val (chr22-50275962-G-A) – ACMG Classification: Likely_benign (-1 pts)

Variant summary

Our verdict is Likely benign. The variant received -1 ACMG points: 0P and 1B. BS1_Supporting

The NM_012401.4(PLXNB2):c.5339C>T(p.Ala1780Val) variant causes a missense, splice region change. The variant allele was found at a frequency of 0.0000192 in 1,612,304 control chromosomes in the GnomAD database, with no homozygous occurrence. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000020 ( 0 hom. )

Consequence

PLXNB2
NM_012401.4 missense, splice_region

Scores

Splicing: ADA: 0.004422

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 5.00

Publications

0 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 -1 ACMG points.

BS1

Variant frequency is greater than expected in population eas. GnomAdExome4 allele frequency = 0.0000199 (29/1460166) while in subpopulation EAS AF = 0.000353 (14/39688). AF 95% confidence interval is 0.000213. There are 0 homozygotes in GnomAdExome4. There are 14 alleles in the male GnomAdExome4 subpopulation. Median coverage is 34. This position passed quality control check. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PLXNB2	NM_012401.4 link	c.5339C>T	p.Ala1780Val	missense_variant, splice_region_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.5339C>T	p.Ala1780Val	missense_variant, splice_region_variant	Exon 36 of 37	5	NM_012401.4	ENSP00000352288.4		O15031

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152138

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000193

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000161

AC:

AN:

247696

AF XY:

0.00000741

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000290

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000557

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000179

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000199

AC:

AN:

1460166

Hom.:

Cov.:

AF XY:

0.0000193

AC XY:

AN XY:

726408

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33476

American (AMR)

AF:

0.0000224

AC:

AN:

44706

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26120

East Asian (EAS)

AF:

0.000353

AC:

AN:

39688

South Asian (SAS)

AF:

0.0000232

AC:

AN:

86250

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52138

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

0.0000108

AC:

AN:

1111676

Other (OTH)

AF:

0.00

AC:

AN:

60346

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.465

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152138

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74304

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41428

American (AMR)

AF:

0.00

AC:

AN:

15288

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.000193

AC:

AN:

5184

South Asian (SAS)

AF:

0.00

AC:

AN:

4834

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10606

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.0000147

AC:

AN:

68010

Other (OTH)

AF:

0.00

AC:

AN:

2090

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.550

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.0000313

Hom.:

Bravo

AF:

0.0000113

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Mar 29, 2023

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.5339C>T (p.A1780V) 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 5339, causing the alanine (A) at amino acid position 1780 to be replaced by a valine (V). 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

0.14

BayesDel_addAF

Benign

-0.18

BayesDel_noAF

Benign

-0.42

CADD

Uncertain

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.096

T;T

Eigen

Benign

0.15

Eigen_PC

Benign

0.16

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Uncertain

0.89

D;.

M_CAP

Benign

0.010

MetaRNN

Uncertain

0.50

D;D

MetaSVM

Benign

-1.0

MutationAssessor

Benign

1.0

L;L

PhyloP100

5.0

PrimateAI

Uncertain

0.66

PROVEAN

Benign

-1.6

N;N

REVEL

Benign

0.20

Sift

Benign

0.11

T;T

Sift4G

Benign

0.21

T;T

Polyphen

0.95

P;P

Vest4

0.53

MutPred

0.38

Loss of disorder (P = 0.0572);Loss of disorder (P = 0.0572);

MVP

0.22

MPC

1.8

ClinPred

0.73

GERP RS

4.8

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.11

gMVP

0.12

Mutation Taster

=87/13

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.0044

dbscSNV1_RF

Benign

0.080

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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chr22-50275962-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