Genetic Variant PREX1:p.Ala1486Thr (chr20-48632347-C-T) – ACMG Classification: Benign (-8 pts)

Variant summary

Our verdict is Benign. The variant received -8 ACMG points: 0P and 8B. BP4_StrongBS2

The NM_020820.4(PREX1):c.4456G>A(p.Ala1486Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000496 in 1,614,042 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A1486S) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.00023 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000031 ( 0 hom. )

Consequence

PREX1
NM_020820.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 0.0560

Publications

9 publications found

Variant links:

Genes affected

PREX1 (HGNC:32594): (phosphatidylinositol-3,4,5-trisphosphate dependent Rac exchange factor 1) The protein encoded by this gene acts as a guanine nucleotide exchange factor for the RHO family of small GTP-binding proteins (RACs). It has been shown to bind to and activate RAC1 by exchanging bound GDP for free GTP. The encoded protein, which is found mainly in the cytoplasm, is activated by phosphatidylinositol-3,4,5-trisphosphate and the beta-gamma subunits of heterotrimeric G proteins. [provided by RefSeq, Jul 2008]

PREX1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -8 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.009978503).

BS2

High AC in GnomAd4 at 35 AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_020820.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PREX1	NM_020820.4	MANE Select	c.4456G>A	p.Ala1486Thr	missense	Exon 35 of 40	NP_065871.3

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
PREX1	ENST00000371941.4	TSL:1 MANE Select	c.4456G>A	p.Ala1486Thr	missense	Exon 35 of 40	ENSP00000361009.3	Q8TCU6-1
PREX1	ENST00000935959.1		c.4384G>A	p.Ala1462Thr	missense	Exon 34 of 39	ENSP00000606018.1
PREX1	ENST00000482556.5	TSL:2	n.2523G>A		non_coding_transcript_exon	Exon 17 of 22	ENSP00000434632.1	H0YDZ4

Frequencies

GnomAD3 genomes

AF:

0.000230

AC:

AN:

152222

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000820

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:

0.00

Gnomad OTH

AF:

0.000478

GnomAD2 exomes

AF:

0.0000796

AC:

AN:

251282

AF XY:

0.0000515

show subpopulations

Gnomad AFR exome

AF:

0.000985

Gnomad AMR exome

AF:

0.0000289

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0000465

Gnomad NFE exome

AF:

0.0000176

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000308

AC:

AN:

1461702

Hom.:

Cov.:

AF XY:

0.0000234

AC XY:

AN XY:

727170

show subpopulations

African (AFR)

AF:

0.000896

AC:

AN:

33480

American (AMR)

AF:

0.0000224

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26134

East Asian (EAS)

AF:

0.00

AC:

AN:

39698

South Asian (SAS)

AF:

0.0000116

AC:

AN:

86256

European-Finnish (FIN)

AF:

0.0000188

AC:

AN:

53264

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00000630

AC:

AN:

1111990

Other (OTH)

AF:

0.0000828

AC:

AN:

60388

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.466

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.000230

AC:

AN:

152340

Hom.:

Cov.:

AF XY:

0.000242

AC XY:

AN XY:

74500

show subpopulations

African (AFR)

AF:

0.000818

AC:

AN:

41586

American (AMR)

AF:

0.00

AC:

AN:

15306

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5174

South Asian (SAS)

AF:

0.00

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10626

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68028

Other (OTH)

AF:

0.000473

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.479

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.000272

ExAC

AF:

0.000107

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.069

BayesDel_addAF

Benign

-0.52

BayesDel_noAF

Benign

-0.58

CADD

Benign

8.7

(source)

DANN

Uncertain

0.99

DEOGEN2

Benign

0.032

Eigen

Benign

-0.85

Eigen_PC

Benign

-0.88

FATHMM_MKL

Benign

0.086

LIST_S2

Benign

0.49

M_CAP

Benign

0.019

MetaRNN

Benign

0.010

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.69

PhyloP100

0.056

PrimateAI

Benign

0.26

PROVEAN

Benign

-0.62

REVEL

Benign

0.020

Sift

Uncertain

0.017

Sift4G

Benign

0.12

Polyphen

0.15

Vest4

0.12

MVP

0.26

MPC

0.33

ClinPred

0.016

GERP RS

-0.56

Varity_R

0.27

gMVP

0.22

Mutation Taster

=89/11

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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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over