Genetic Variant ALPI:p.Thr142Met (chr2-232457023-C-T) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_001631.5(ALPI):c.425C>T(p.Thr142Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000725 in 1,613,494 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00013 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000066 ( 0 hom. )

Consequence

ALPI
NM_001631.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.778

Variant links:

Genes affected

ALPI (HGNC:437): (alkaline phosphatase, intestinal) There are at least four distinct but related alkaline phosphatases: intestinal, placental, placental-like, and liver/bone/kidney (tissue non-specific). The intestinal alkaline phosphatase gene encodes a digestive brush-border enzyme. This enzyme is a component of the gut mucosal defense system and is thought to function in the detoxification of lipopolysaccharide, and in the prevention of bacterial translocation in the gut. [provided by RefSeq, Dec 2014]

ALPI links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ALPI	NM_001631.5 link	c.425C>T	p.Thr142Met	missense_variant	Exon 4 of 11	ENST00000295463.4	NP_001622.2	P09923A0A024R4A2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
ALPI	ENST00000295463.4 link	c.425C>T	p.Thr142Met	missense_variant	Exon 4 of 11	1	NM_001631.5	ENSP00000295463.3	P09923
ALPI	ENST00000457560.1 link	n.*354C>T		non_coding_transcript_exon_variant	Exon 3 of 10	5		ENSP00000413068.1	F8WEQ0
ALPI	ENST00000457560.1 link	n.*354C>T		3_prime_UTR_variant	Exon 3 of 10	5		ENSP00000413068.1	F8WEQ0

Frequencies

GnomAD3 genomes

AF:

0.000131

AC:

AN:

152220

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000145

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000589

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:

0.0000735

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000108

AC:

AN:

250484

Hom.:

AF XY:

0.000103

AC XY:

AN XY:

135652

show subpopulations

Gnomad AFR exome

AF:

0.000124

Gnomad AMR exome

AF:

0.000319

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000327

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000106

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.0000664

AC:

AN:

1461274

Hom.:

Cov.:

AF XY:

0.0000688

AC XY:

AN XY:

726938

show subpopulations

Gnomad4 AFR exome

AF:

0.000119

Gnomad4 AMR exome

AF:

0.000291

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000252

Gnomad4 SAS exome

AF:

0.0000464

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000621

Gnomad4 OTH exome

AF:

0.0000994

GnomAD4 genome

AF:

0.000131

AC:

AN:

152220

Hom.:

Cov.:

AF XY:

0.000121

AC XY:

AN XY:

74356

show subpopulations

Gnomad4 AFR

AF:

0.000145

Gnomad4 AMR

AF:

0.000589

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000735

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000434

Hom.:

Bravo

AF:

0.000125

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.000233

AC:

ExAC

AF:

0.0000988

AC:

EpiCase

AF:

0.000164

EpiControl

AF:

0.000415

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Oct 06, 2021

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.425C>T (p.T142M) alteration is located in exon 4 (coding exon 4) of the ALPI gene. This alteration results from a C to T substitution at nucleotide position 425, causing the threonine (T) at amino acid position 142 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

Benign

0.23

BayesDel_addAF

Benign

-0.062

BayesDel_noAF

Uncertain

-0.030

CADD

Benign

DANN

Uncertain

1.0

DEOGEN2

Pathogenic

0.87

Eigen

Uncertain

0.20

Eigen_PC

Benign

-0.0057

FATHMM_MKL

Benign

0.72

LIST_S2

Benign

0.84

M_CAP

Uncertain

0.18

MetaRNN

Uncertain

0.53

MetaSVM

Pathogenic

0.99

MutationAssessor

Pathogenic

3.5

PrimateAI

Benign

0.43

PROVEAN

Pathogenic

-4.5

REVEL

Uncertain

0.49

Sift

Uncertain

0.014

Sift4G

Uncertain

0.016

Polyphen

1.0

Vest4

0.20

MVP

0.86

MPC

0.63

ClinPred

0.88

GERP RS

4.3

Varity_R

0.17

gMVP

0.77

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

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over