Genetic Variant PLXNB2:p.Thr1724Met (chr22-50277616-G-A) – ACMG Classification: Uncertain_significance (1 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PP3_ModerateBS1_Supporting

The NM_012401.4(PLXNB2):c.5171C>T(p.Thr1724Met) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000921 in 1,596,868 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000026 ( 0 hom., cov: 34)

Exomes 𝑓: 0.000099 ( 0 hom. )

Consequence

PLXNB2
NM_012401.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 7.79

Publications

1 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: Uncertain_significance. The variant received 1 ACMG points.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.845

BS1

Variant frequency is greater than expected in population mid. GnomAdExome4 allele frequency = 0.000099 (143/1444626) while in subpopulation MID AF = 0.000175 (1/5710). AF 95% confidence interval is 0.000102. There are 0 homozygotes in GnomAdExome4. There are 69 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.5171C>T	p.Thr1724Met	missense_variant	Exon 33 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.5171C>T	p.Thr1724Met	missense_variant	Exon 33 of 37	5	NM_012401.4	ENSP00000352288.4		O15031

Frequencies

GnomAD3 genomes

AF:

0.0000263

AC:

AN:

152242

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000482

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.000478

GnomAD2 exomes

AF:

0.0000333

AC:

AN:

240158

AF XY:

0.0000459

show subpopulations

Gnomad AFR exome

AF:

0.0000656

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000552

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000990

AC:

143

AN:

1444626

Hom.:

Cov.:

AF XY:

0.0000963

AC XY:

AN XY:

716222

show subpopulations

African (AFR)

AF:

0.000121

AC:

AN:

33046

American (AMR)

AF:

0.00

AC:

AN:

43468

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25546

East Asian (EAS)

AF:

0.00

AC:

AN:

39376

South Asian (SAS)

AF:

0.0000118

AC:

AN:

84590

European-Finnish (FIN)

AF:

0.00

AC:

AN:

51810

Middle Eastern (MID)

AF:

0.000175

AC:

AN:

5710

European-Non Finnish (NFE)

AF:

0.000119

AC:

131

AN:

1101420

Other (OTH)

AF:

0.000101

AC:

AN:

59660

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.470

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.0000263

AC:

AN:

152242

Hom.:

Cov.:

AF XY:

0.0000403

AC XY:

AN XY:

74382

show subpopulations

African (AFR)

AF:

0.0000482

AC:

AN:

41466

American (AMR)

AF:

0.00

AC:

AN:

15290

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5196

South Asian (SAS)

AF:

0.00

AC:

AN:

4832

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10630

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.0000147

AC:

AN:

68036

Other (OTH)

AF:

0.000478

AC:

AN:

2092

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.525

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.0000508

Hom.:

Bravo

AF:

0.0000567

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.00

AC:

ExAC

AF:

0.0000248

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jan 21, 2025

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.5171C>T (p.T1724M) alteration is located in exon 33 (coding exon 31) of the PLXNB2 gene. This alteration results from a C to T substitution at nucleotide position 5171, causing the threonine (T) at amino acid position 1724 to be replaced by a methionine (M). 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

0.53

BayesDel_addAF

Uncertain

0.061

BayesDel_noAF

Benign

-0.15

CADD

Uncertain

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.38

T;T

Eigen

Uncertain

0.50

Eigen_PC

Uncertain

0.38

FATHMM_MKL

Uncertain

0.96

LIST_S2

Uncertain

0.90

D;.

M_CAP

Benign

0.027

MetaRNN

Pathogenic

0.85

D;D

MetaSVM

Benign

-1.0

MutationAssessor

Uncertain

2.8

M;M

PhyloP100

7.8

PrimateAI

Pathogenic

0.79

PROVEAN

Pathogenic

-5.6

D;D

REVEL

Uncertain

0.38

Sift

Benign

0.035

D;D

Sift4G

Uncertain

0.013

D;D

Polyphen

1.0

D;D

Vest4

0.80

MVP

0.66

MPC

1.9

ClinPred

0.88

GERP RS

3.9

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.18

gMVP

0.80

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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22-50277616-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