Genetic Variant ALKBH2:p.Pro229Ala (chr12-109088307-G-C) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

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

The NM_001145374.2(ALKBH2):c.685C>G(p.Pro229Ala) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000273 in 1,614,138 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00016 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000014 ( 0 hom. )

Consequence

ALKBH2
NM_001145374.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 9.32

Variant links:

Genes affected

ALKBH2 (HGNC:32487): (alkB homolog 2, alpha-ketoglutarate dependent dioxygenase) The Escherichia coli AlkB protein protects against the cytotoxicity of methylating agents by repair of the specific DNA lesions generated in single-stranded DNA. ALKBH2 and ALKBH3 (MIM 610603) are E. coli AlkB homologs that catalyze the removal of 1-methyladenine and 3-methylcytosine (Duncan et al., 2002 [PubMed 12486230]).[supplied by OMIM, Mar 2008]

ALKBH2 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
ALKBH2	NM_001145374.2 link	c.685C>G	p.Pro229Ala	missense_variant	Exon 4 of 4	ENST00000429722.3	NP_001138846.1	Q6NS38-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
ALKBH2	ENST00000429722.3 link	c.685C>G	p.Pro229Ala	missense_variant	Exon 4 of 4	5	NM_001145374.2	ENSP00000398181.1	Q6NS38-1
ALKBH2	ENST00000343075.7 link	c.685C>G	p.Pro229Ala	missense_variant	Exon 4 of 4	1		ENSP00000343021.3	Q6NS38-1
ALKBH2	ENST00000440112 link	c.*12C>G		3_prime_UTR_variant	Exon 2 of 2	1		ENSP00000399820.2	Q6NS38-2
ALKBH2	ENST00000619381 link	c.*12C>G		3_prime_UTR_variant	Exon 3 of 3	5		ENSP00000478765.1	Q6NS38-2

Frequencies

GnomAD3 genomes

AF:

0.000158

AC:

AN:

152138

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000579

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000437

AC:

AN:

251452

Hom.:

AF XY:

0.0000221

AC XY:

AN XY:

135898

show subpopulations

Gnomad AFR exome

AF:

0.000615

Gnomad AMR exome

AF:

0.0000289

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:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000137

AC:

AN:

1461882

Hom.:

Cov.:

AF XY:

0.0000110

AC XY:

AN XY:

727240

show subpopulations

Gnomad4 AFR exome

AF:

0.000538

Gnomad4 AMR exome

AF:

0.0000224

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:

0.00

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.000158

AC:

AN:

152256

Hom.:

Cov.:

AF XY:

0.000161

AC XY:

AN XY:

74448

show subpopulations

Gnomad4 AFR

AF:

0.000578

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000142

Hom.:

Bravo

AF:

0.000227

ESP6500AA

AF:

0.00113

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000494

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Dec 07, 2021

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.685C>G (p.P229A) alteration is located in exon 4 (coding exon 3) of the ALKBH2 gene. This alteration results from a C to G substitution at nucleotide position 685, causing the proline (P) at amino acid position 229 to be replaced by an alanine (A). 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

0.30

BayesDel_addAF

Benign

-0.22

BayesDel_noAF

Benign

-0.17

CADD

Pathogenic

DANN

Uncertain

0.99

DEOGEN2

Benign

0.24

T;T

Eigen

Uncertain

0.64

Eigen_PC

Uncertain

0.65

FATHMM_MKL

Pathogenic

1.0

LIST_S2

Uncertain

0.92

.;D

M_CAP

Benign

0.0054

MetaRNN

Uncertain

0.54

D;D

MetaSVM

Benign

-1.2

MutationAssessor

Benign

1.6

L;L

PrimateAI

Uncertain

0.55

PROVEAN

Pathogenic

-6.0

D;D

REVEL

Uncertain

0.31

Sift

Uncertain

0.019

D;D

Sift4G

Benign

0.16

T;T

Polyphen

1.0

D;D

Vest4

0.81

MVP

0.56

MPC

0.39

ClinPred

0.24

GERP RS

5.5

Varity_R

0.56

gMVP

0.41

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