Genetic Variant PDXP:p.Glu220Lys (chr22-37665638-G-A) – ACMG Classification: Uncertain_significance (1 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2BP4

The NM_020315.5(PDXP):c.658G>A(p.Glu220Lys) variant causes a missense change. The variant allele was found at a frequency of 0.00000479 in 1,461,686 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 Uncertain significance (★).

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.0000048 ( 0 hom. )

Consequence

PDXP
NM_020315.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 6.58

Publications

2 publications found

Variant links:

Genes affected

PDXP (HGNC:30259): (pyridoxal phosphatase) Pyridoxal 5-prime-phosphate (PLP) is the active form of vitamin B6 that acts as a coenzyme in maintaining biochemical homeostasis. The preferred degradation route from PLP to 4-pyridoxic acid involves the dephosphorylation of PLP by PDXP (Jang et al., 2003 [PubMed 14522954]).[supplied by OMIM, Mar 2008]

PDXP links:

ENSG00000285304 (HGNC:):

ENSG00000285304 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.30649143).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PDXP	NM_020315.5 link	c.658G>A	p.Glu220Lys	missense_variant	Exon 2 of 2	ENST00000215904.7	NP_064711.1	Q96GD0-1A0A024R1I3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
PDXP	ENST00000215904.7 link	c.658G>A	p.Glu220Lys	missense_variant	Exon 2 of 2	1	NM_020315.5	ENSP00000215904.6	Q96GD0-1
ENSG00000285304	ENST00000451997.6 link	c.1585G>A	p.Glu529Lys	missense_variant	Exon 17 of 17	2		ENSP00000401076.2	F8WEQ3
PDXP	ENST00000403251.1 link	c.7G>A	p.Glu3Lys	missense_variant	Exon 2 of 2	2		ENSP00000385336.1	B1AHD3

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000479

AC:

AN:

1461686

Hom.:

Cov.:

AF XY:

0.00000550

AC XY:

AN XY:

727156

show subpopulations

African (AFR)

AF:

0.0000597

AC:

AN:

33480

American (AMR)

AF:

0.00

AC:

AN:

44720

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26134

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.0000116

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53234

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00000180

AC:

AN:

1111998

Other (OTH)

AF:

0.0000331

AC:

AN:

60394

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.489

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

Alfa

AF:

0.0000581

Hom.:

Bravo

AF:

0.0000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Mar 26, 2025

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.658G>A (p.E220K) alteration is located in exon 2 (coding exon 2) of the PDXP gene. This alteration results from a G to A substitution at nucleotide position 658, causing the glutamic acid (E) at amino acid position 220 to be replaced by a lysine (K). 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

0.32

BayesDel_addAF

Benign

-0.12

BayesDel_noAF

Benign

-0.41

CADD

Uncertain

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.12

.;T;.

Eigen

Uncertain

0.23

Eigen_PC

Uncertain

0.33

FATHMM_MKL

Uncertain

0.95

LIST_S2

Benign

0.82

T;D;T

M_CAP

Benign

0.015

MetaRNN

Benign

0.31

T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.83

.;L;.

PhyloP100

6.6

PROVEAN

Uncertain

-2.6

.;D;D

REVEL

Benign

0.10

Sift

Benign

0.18

.;T;T

Sift4G

Benign

0.29

.;T;D

Polyphen

0.72

.;P;.

Vest4

0.37, 0.21

MVP

0.47

MPC

0.46

ClinPred

0.85

GERP RS

4.5

Varity_R

0.28

gMVP

0.73

Mutation Taster

=63/37

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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chr22-37665638-G-A

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over