rs188689330

Variant names:

Variant summary

Our verdict is Benign. The variant received -11 ACMG points: 0P and 11B. BP4_ModerateBP6_Very_StrongBP7

The NM_000478.6(ALPL):c.744C>T(p.Asp248Asp) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000188 in 1,614,034 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.00050 ( 1 hom., cov: 32)

Exomes 𝑓: 0.00016 ( 1 hom. )

Consequence

ALPL
NM_000478.6 synonymous

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:6

Conservation

PhyloP100: -2.06

Publications

0 publications found

Variant links:

Genes affected

ALPL (HGNC:438): (alkaline phosphatase, biomineralization associated) This gene encodes a member of the alkaline phosphatase family of proteins. There are at least four distinct but related alkaline phosphatases: intestinal, placental, placental-like, and liver/bone/kidney (tissue non-specific). The first three are located together on chromosome 2, while the tissue non-specific form is located on chromosome 1. The product of this gene is a membrane bound glycosylated enzyme that is not expressed in any particular tissue and is, therefore, referred to as the tissue-nonspecific form of the enzyme. Alternative splicing results in multiple transcript variants, at least one of which encodes a preproprotein that is proteolytically processed to generate the mature enzyme. This enzyme may play a role in bone mineralization. Mutations in this gene have been linked to hypophosphatasia, a disorder that is characterized by hypercalcemia and skeletal defects. [provided by RefSeq, Oct 2015]

ALPL Gene-Disease associations (from GenCC):

adult hypophosphatasia
Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: ClinGen, PanelApp Australia, Labcorp Genetics (formerly Invitae), Orphanet
childhood hypophosphatasia
Inheritance: AR, AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: Laboratory for Molecular Medicine, ClinGen, Orphanet
hypophosphatasia
Inheritance: AR Classification: DEFINITIVE Submitted by: Myriad Women’s Health, G2P
infantile hypophosphatasia
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, ClinGen, Labcorp Genetics (formerly Invitae), PanelApp Australia
odontohypophosphatasia
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
perinatal lethal hypophosphatasia
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ALPL links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -11 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.36).

BP6

Variant 1-21568199-C-T is Benign according to our data. Variant chr1-21568199-C-T is described in ClinVar as [Likely_benign]. Clinvar id is 256230.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=-2.06 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ALPL	NM_000478.6 link	c.744C>T	p.Asp248Asp	synonymous_variant	Exon 7 of 12	ENST00000374840.8	NP_000469.3	P05186-1A0A024RAB4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
ALPL	ENST00000374840.8 link	c.744C>T	p.Asp248Asp	synonymous_variant	Exon 7 of 12	1	NM_000478.6	ENSP00000363973.3	P05186-1
ALPL	ENST00000374832.5 link	c.744C>T	p.Asp248Asp	synonymous_variant	Exon 7 of 12	2		ENSP00000363965.1	P05186-1
ALPL	ENST00000540617.5 link	c.579C>T	p.Asp193Asp	synonymous_variant	Exon 6 of 11	2		ENSP00000442672.1	P05186-3
ALPL	ENST00000539907.5 link	c.513C>T	p.Asp171Asp	synonymous_variant	Exon 5 of 10	2		ENSP00000437674.1	P05186-2

Frequencies

GnomAD3 genomes

AF:

0.000500

AC:

AN:

152038

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000483

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00190

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.0127

Gnomad NFE

AF:

0.000309

Gnomad OTH

AF:

0.000955

GnomAD2 exomes

AF:

0.000231

AC:

AN:

251386

AF XY:

0.000213

show subpopulations

Gnomad AFR exome

AF:

0.000308

Gnomad AMR exome

AF:

0.000810

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000158

Gnomad OTH exome

AF:

0.00114

GnomAD4 exome

AF:

0.000155

AC:

227

AN:

1461878

Hom.:

Cov.:

AF XY:

0.000160

AC XY:

116

AN XY:

727236

show subpopulations

African (AFR)

AF:

0.000239

AC:

AN:

33480

American (AMR)

AF:

0.000961

AC:

AN:

44722

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

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:

53412

Middle Eastern (MID)

AF:

0.000694

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

0.000124

AC:

138

AN:

1112010

Other (OTH)

AF:

0.000546

AC:

AN:

60394

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

GnomAD4 genome

AF:

0.000499

AC:

AN:

152156

Hom.:

Cov.:

AF XY:

0.000471

AC XY:

AN XY:

74374

show subpopulations

African (AFR)

AF:

0.000482

AC:

AN:

41516

American (AMR)

AF:

0.00190

AC:

AN:

15288

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5154

South Asian (SAS)

AF:

0.00

AC:

AN:

4806

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10604

Middle Eastern (MID)

AF:

0.0136

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000309

AC:

AN:

67996

Other (OTH)

AF:

0.000945

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.481

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.000320

Hom.:

Bravo

AF:

0.000548

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.000109

EpiControl

AF:

0.000119

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:6

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:3

May 11, 2020

Athena Diagnostics

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

PreventionGenetics, part of Exact Sciences

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Aug 20, 2019

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not provided

Benign:3

Feb 03, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Department of Pathology and Laboratory Medicine, Sinai Health System

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

The ALPL p.Asp171Asp variant was not identified in the literature nor was it identified in the COGR, Cosmic, MutDB or LOVD 3.0 databases. The variant was identified in dbSNP (ID: rs188689330) and ClinVar (classified as likely benign by Prevention Genetics). The variant was identified in control databases in 78 of 282744 chromosomes at a frequency of 0.000276 (Genome Aggregation Database Feb 27, 2017). The variant was observed in the following populations: Other in 7 of 7222 chromosomes (freq: 0.000969), Latino in 29 of 35432 chromosomes (freq: 0.000819), African in 11 of 24944 chromosomes (freq: 0.000441) and European (non-Finnish) in 31 of 129096 chromosomes (freq: 0.00024), but was not observed in the Ashkenazi Jewish, East Asian, European (Finnish), and South Asian populations. The p.Asp171Asp variant is not expected to have clinical significance because it does not result in a change of amino acid and is not located in a known consensus splice site. The variant occurs outside of the splicing consensus sequence and in silico or computational prediction software programs (SpliceSiteFinder, MaxEntScan, NNSPLICE, GeneSplicer) do not predict a difference in splicing. In summary, based on the above information the clinical significance of this variant cannot be determined with certainty at this time although we would lean towards a more benign role for this variant. This variant is classified as likely benign. -

Breakthrough Genomics, Breakthrough Genomics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:not provided

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.36

CADD

Benign

2.1

(source)

DANN

Benign

0.40

PhyloP100

-2.1

Mutation Taster

=100/0

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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rs188689330

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