rs267606645

Variant summary

Our verdict is Pathogenic. Variant got 10 ACMG points: 10P and 0B. PM1PM2PP3_StrongPP5_Moderate

The NM_001625.4(AK2):c.556C>T(p.Arg186Cys) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000044 in 1,613,962 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R186H) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000026 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000046 ( 0 hom. )

Consequence

AK2
NM_001625.4 missense

Scores

Clinical Significance

Likely pathogenic criteria provided, single submitter P:2

Conservation

PhyloP100: 9.96

Variant links:

Genes affected

AK2 (HGNC:362): (adenylate kinase 2) Adenylate kinases are involved in regulating the adenine nucleotide composition within a cell by catalyzing the reversible transfer of phosphate groups among adenine nucleotides. Three isozymes of adenylate kinase, namely 1, 2, and 3, have been identified in vertebrates; this gene encodes isozyme 2. Expression of these isozymes is tissue-specific and developmentally regulated. Isozyme 2 is localized in the mitochondrial intermembrane space and may play a role in apoptosis. Mutations in this gene are the cause of reticular dysgenesis. Alternate splicing results in multiple transcript variants. Pseudogenes of this gene are found on chromosomes 1 and 2.[provided by RefSeq, Nov 2010]

AK2 links:

(HGNC:):

links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 10 ACMG points.

PM1

In a binding_site (size 0) in uniprot entity KAD2_HUMAN

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.967

PP5

Variant 1-33013345-G-A is Pathogenic according to our data. Variant chr1-33013345-G-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 18258.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
AK2	NM_001625.4 linkuse as main transcript	c.556C>T	p.Arg186Cys	missense_variant	6/6	ENST00000672715.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
AK2	ENST00000672715.1 linkuse as main transcript	c.556C>T	p.Arg186Cys	missense_variant	6/6		NM_001625.4	P3	P54819-1
	ENST00000427524.1 linkuse as main transcript	n.246-17690G>A		intron_variant, non_coding_transcript_variant		2

Frequencies

GnomAD3 genomes

AF:

0.0000263

AC:

AN:

152140

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000483

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000655

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:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000159

AC:

AN:

251468

Hom.:

AF XY:

0.0000221

AC XY:

AN XY:

135908

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000264

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.0000458

AC:

AN:

1461822

Hom.:

Cov.:

AF XY:

0.0000523

AC XY:

AN XY:

727194

show subpopulations

Gnomad4 AFR exome

AF:

0.0000896

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000558

Gnomad4 OTH exome

AF:

0.0000331

GnomAD4 genome

AF:

0.0000263

AC:

AN:

152140

Hom.:

Cov.:

AF XY:

0.0000404

AC XY:

AN XY:

74308

show subpopulations

Gnomad4 AFR

AF:

0.0000483

Gnomad4 AMR

AF:

0.0000655

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000386

Hom.:

Bravo

AF:

0.0000264

ExAC

AF:

0.0000247

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:2

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Reticular dysgenesis

Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Jan 01, 2009

- -

Severe combined immunodeficiency disease

Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

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

Aug 04, 2022

Variant summary: AK2 c.556C>T (p.Arg186Cys) results in a non-conservative amino acid change in the encoded protein sequence. Four of five in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 1.6e-05 in 251468 control chromosomes (gnomAD). c.556C>T has been reported in the literature in a homozygous and a compound heterozygous child (who carried exon 2 deletion in trans), both affected with reticular dysgenesis (Lagresle-Peyrou_2009, Hoenig_2017). In addition, the Arg186 amino acid is evolutionarily highly conserved, and occurs in an evolutionarily constrained region (Hoenig_2017, PMID 29358731). These data indicate that the variant is likely associated with disease. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014. Based on the evidence outlined above, the variant was classified as likely pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.98

BayesDel_addAF

Pathogenic

0.33

BayesDel_noAF

Pathogenic

0.41

Cadd

Pathogenic

Dann

Uncertain

1.0

Eigen

Uncertain

0.64

Eigen_PC

Pathogenic

0.67

FATHMM_MKL

Pathogenic

1.0

LIST_S2

Uncertain

0.94

D;D;D;D

M_CAP

Uncertain

0.10

MetaRNN

Pathogenic

0.97

D;D;D;D

MetaSVM

Uncertain

0.76

MutationAssessor

Pathogenic

4.6

H;.;.;H

MutationTaster

Benign

1.0

D;D;D;D;D

PrimateAI

Uncertain

0.62

PROVEAN

Pathogenic

-7.7

D;D;D;D

REVEL

Pathogenic

0.75

Sift

Uncertain

0.016

D;D;D;D

Sift4G

Uncertain

0.015

D;D;D;D

Polyphen

0.043

B;B;.;B

Vest4

0.98

MutPred

0.87

Gain of catalytic residue at L187 (P = 0.0176);.;Gain of catalytic residue at L187 (P = 0.0176);Gain of catalytic residue at L187 (P = 0.0176);

MVP

0.95

MPC

0.26

ClinPred

0.97

GERP RS

5.2

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.95

gMVP

0.86

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