rs145965024

Variant names:

Your query was ambiguous. Multiple possible variants found:

Variant summary

Our verdict is Benign. The variant received -16 ACMG points: 0P and 16B. BP4_StrongBP6_Very_StrongBS2

The NM_144670.6(A2ML1):c.2029-5A>C variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000395 in 1,613,522 control chromosomes in the GnomAD database, including 3 homozygotes. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Benign (★★).

Frequency

Genomes: 𝑓 0.0020 ( 1 hom., cov: 32)

Exomes 𝑓: 0.00022 ( 2 hom. )

Consequence

A2ML1
NM_144670.6 splice_region, intron

Scores

Splicing: ADA: 0.00001415

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:4

Conservation

PhyloP100: -5.88

Publications

0 publications found

Variant links:

Genes affected

A2ML1 (HGNC:23336): (alpha-2-macroglobulin like 1) This gene encodes a member of the alpha-macroglobulin superfamily. The encoded protein is thought to be an N-glycosylated monomeric protein that acts as an inhibitor of several proteases. It has been shown to form covalent interactions with proteases, and has been reported as the p170 antigen recognized by autoantibodies in the autoimmune disease paraneoplastic pemphigus (PNP; PMID:20805888). Mutations in these gene have also been associated with some cases of Noonan syndrome (NS; PMID:24939586) as well as some cases of otitis media (PMID:26121085). Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Aug 2015]

A2ML1 Gene-Disease associations (from GenCC):

Noonan syndrome
Inheritance: AD Classification: SUPPORTIVE, LIMITED, NO_KNOWN Submitted by: Genomics England PanelApp, ClinGen, Orphanet

A2ML1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -16 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-1.13).

BP6

Variant 12-8849664-A-C is Benign according to our data. Variant chr12-8849664-A-C is described in ClinVar as Benign. ClinVar VariationId is 413814.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS2

High AC in GnomAd4 at 311 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
A2ML1	NM_144670.6 link	c.2029-5A>C		splice_region_variant, intron_variant	Intron 16 of 35	ENST00000299698.12	NP_653271.3	B3KVV6

Ensembl

Gene	Transcript	HGVSc	Effect	Exon rank	TSL	MANE	Protein	UniProt
A2ML1	ENST00000299698.12 link	c.2029-5A>C	splice_region_variant, intron_variant	Intron 16 of 35	1	NM_144670.6	ENSP00000299698.7	A8K2U0-1
A2ML1	ENST00000541459.5 link	c.679-5A>C	splice_region_variant, intron_variant	Intron 5 of 24	2		ENSP00000443174.1	H0YGG5
A2ML1	ENST00000539547.5 link	c.556-5A>C	splice_region_variant, intron_variant	Intron 5 of 24	2		ENSP00000438292.1	A8K2U0-2

Frequencies

GnomAD3 genomes

AF:

0.00205

AC:

312

AN:

152224

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00699

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000916

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:

0.000103

Gnomad OTH

AF:

0.000478

GnomAD2 exomes

AF:

0.000497

AC:

124

AN:

249460

AF XY:

0.000325

show subpopulations

Gnomad AFR exome

AF:

0.00678

Gnomad AMR exome

AF:

0.000203

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000530

Gnomad OTH exome

AF:

0.000990

GnomAD4 exome

AF:

0.000223

AC:

326

AN:

1461180

Hom.:

Cov.:

AF XY:

0.000215

AC XY:

156

AN XY:

726942

show subpopulations

African (AFR)

AF:

0.00589

AC:

197

AN:

33458

American (AMR)

AF:

0.000380

AC:

AN:

44712

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26132

East Asian (EAS)

AF:

0.00

AC:

AN:

39698

South Asian (SAS)

AF:

0.00

AC:

AN:

86228

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53418

Middle Eastern (MID)

AF:

0.00121

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.0000666

AC:

AN:

1111396

Other (OTH)

AF:

0.000513

AC:

AN:

60370

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.482

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

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:

0.00204

AC:

311

AN:

152342

Hom.:

Cov.:

AF XY:

0.00183

AC XY:

136

AN XY:

74500

show subpopulations

African (AFR)

AF:

0.00695

AC:

289

AN:

41588

American (AMR)

AF:

0.000915

AC:

AN:

15302

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5180

South Asian (SAS)

AF:

0.00

AC:

AN:

4826

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10624

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000103

AC:

AN:

68030

Other (OTH)

AF:

0.000473

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.506

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:

0.00140

Hom.:

Bravo

AF:

0.00218

Asia WGS

AF:

0.00144

AC:

AN:

3478

EpiCase

AF:

0.000218

EpiControl

AF:

0.0000593

ClinVar

Significance: Benign

Submissions summary: Benign:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:2

Jan 27, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Oct 12, 2018

GeneDx

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not specified

Benign:1

Dec 30, 2019

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

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Variant summary: A2ML1 c.2029-5A>C alters a non-conserved nucleotide located close to a canonical splice site and therefore could affect mRNA splicing, leading to a significantly altered protein sequence. 4/4 computational tools predict no significant impact on normal splicing. However, these predictions have yet to be confirmed by functional studies. The variant allele was found at a frequency of 0.0005 in 249460 control chromosomes in the gnomAD database, including 2 homozygotes. The observed variant frequency is approximately 124 fold of the estimated maximal expected allele frequency for a pathogenic variant in A2ML1 causing Noonan Syndrome phenotype (4e-06), strongly suggesting that the variant is benign. To our knowledge, no occurrence of c.2029-5A>C in individuals affected with Noonan Syndrome and no experimental evidence demonstrating its impact on protein function have been reported. One clinical diagnostic laboratory has submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation and classified the variant as benign. Based on the evidence outlined above, the variant was classified as benign. -

A2ML1-related disorder

Benign:1

Jun 26, 2019

PreventionGenetics, part of Exact Sciences

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-1.1

CADD

Benign

0.0020

(source)

DANN

Benign

0.43

PhyloP100

-5.9

Mutation Taster

=97/3

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.000014

dbscSNV1_RF

Benign

0.0040

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

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over