rs200744656

Positions:

chr12-8868551-G-A

Variant summary

Our verdict is Benign. Variant got -16 ACMG points: 0P and 16B. BP4_StrongBP6_Very_StrongBS2

The NM_144670.6(A2ML1):c.4076G>A(p.Arg1359His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000484 in 1,613,904 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.00039 ( 0 hom., cov: 31)

Exomes 𝑓: 0.00049 ( 1 hom. )

Consequence

A2ML1
NM_144670.6 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:4

Conservation

PhyloP100: 1.88

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 links:

A2ML1 (HGNC:):

A2ML1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -16 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.030891716).

BP6

Variant 12-8868551-G-A is Benign according to our data. Variant chr12-8868551-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 406199.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr12-8868551-G-A is described in Lovd as [Likely_benign].

BS2

High AC in GnomAd4 at 59 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
A2ML1	NM_144670.6 linkuse as main transcript	c.4076G>A	p.Arg1359His	missense_variant	32/36	ENST00000299698.12	NP_653271.3	B3KVV6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
A2ML1	ENST00000299698.12 linkuse as main transcript	c.4076G>A	p.Arg1359His	missense_variant	32/36	1	NM_144670.6	ENSP00000299698.7		A8K2U0-1

Frequencies

GnomAD3 genomes

AF:

0.000388

AC:

AN:

151960

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000967

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

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:

0.000735

Gnomad OTH

AF:

0.00144

GnomAD3 exomes

AF:

0.000405

AC:

101

AN:

249358

Hom.:

AF XY:

0.000444

AC XY:

AN XY:

135278

show subpopulations

Gnomad AFR exome

AF:

0.000129

Gnomad AMR exome

AF:

0.000203

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000654

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000760

Gnomad OTH exome

AF:

0.000661

GnomAD4 exome

AF:

0.000494

AC:

722

AN:

1461826

Hom.:

Cov.:

AF XY:

0.000523

AC XY:

380

AN XY:

727206

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000201

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000232

Gnomad4 FIN exome

AF:

0.0000374

Gnomad4 NFE exome

AF:

0.000602

Gnomad4 OTH exome

AF:

0.000431

GnomAD4 genome

AF:

0.000388

AC:

AN:

152078

Hom.:

Cov.:

AF XY:

0.000269

AC XY:

AN XY:

74364

show subpopulations

Gnomad4 AFR

AF:

0.0000964

Gnomad4 AMR

AF:

0.000131

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000735

Gnomad4 OTH

AF:

0.00142

Alfa

AF:

0.000688

Hom.:

Bravo

AF:

0.000366

TwinsUK

AF:

0.00

AC:

ALSPAC

AF:

0.000778

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000480

AC:

ExAC

AF:

0.000438

AC:

EpiCase

AF:

0.000872

EpiControl

AF:

0.00136

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:2

Likely benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 28, 2024	- -
Benign, criteria provided, single submitter	clinical testing	GeneDx	Aug 11, 2020	- -

not specified

Benign:1

Benign, criteria provided, single submitter

clinical testing

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

Aug 22, 2022

Variant summary: A2ML1 c.4076G>A (p.Arg1359His) results in a non-conservative amino acid change in the encoded protein sequence. Four of five in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 0.00041 in 249358 control chromosomes. The observed variant frequency is approximately 101 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.4076G>A in individuals affected with Noonan Syndrome and no experimental evidence demonstrating its impact on protein function have been reported. Two clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation. All laboratories classified the variant as benign/likely benign. Based on the evidence outlined above, the variant was classified as benign. -

A2ML1-related disorder

Benign:1

Likely benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Aug 25, 2022

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

AlphaMissense

Benign

0.089

BayesDel_addAF

Benign

-0.45

BayesDel_noAF

Benign

-0.51

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.027

T;T;.

Eigen

Benign

-0.29

Eigen_PC

Benign

-0.27

FATHMM_MKL

Benign

0.47

LIST_S2

Benign

0.78

T;T;T

M_CAP

Benign

0.011

MetaRNN

Benign

0.031

T;T;T

MetaSVM

Benign

-0.96

MutationAssessor

Benign

1.8

L;.;.

PrimateAI

Benign

0.28

PROVEAN

Pathogenic

-4.6

D;D;D

REVEL

Benign

0.054

Sift

Uncertain

0.019

D;D;D

Sift4G

Uncertain

0.023

D;D;D

Polyphen

0.078

B;.;.

Vest4

0.27

MVP

0.25

MPC

0.28

ClinPred

0.43

GERP RS

1.9

Varity_R

0.10

gMVP

0.35

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