12-109090022-C-T

Variant names:

• chr12-109090022-C-T
• rs367979659
• NM_001145374.2:c.466G>A

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_001145374.2(ALKBH2):​c.466G>A​(p.Val156Met) variant causes a missense change. The variant allele was found at a frequency of 0.000000684 in 1,461,870 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. V156L) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: ALKBH2 NM_001145374.2 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 7.18
• Publications: 0 publications found

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]

ACMG classification

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.884

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001145374.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ALKBH2	NM_001145374.2	MANE Select	c.466G>A	p.Val156Met	missense	Exon 3 of 4	NP_001138846.1	Q6NS38-1
	ALKBH2	NM_001001655.3		c.466G>A	p.Val156Met	missense	Exon 3 of 4	NP_001001655.1	Q6NS38-1
	ALKBH2	NM_001145375.2		c.466G>A	p.Val156Met	missense	Exon 3 of 4	NP_001138847.1	Q6NS38-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ALKBH2	ENST00000429722.3	TSL:5 MANE Select	c.466G>A	p.Val156Met	missense	Exon 3 of 4	ENSP00000398181.1	Q6NS38-1
	ALKBH2	ENST00000343075.7	TSL:1	c.466G>A	p.Val156Met	missense	Exon 3 of 4	ENSP00000343021.3	Q6NS38-1
	ALKBH2	ENST00000440112.2	TSL:1	c.281-1510G>A		intron	N/A	ENSP00000399820.2	Q6NS38-2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461870 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 727230

African (AFR) AF: 0.0000299 AC: 1 AN: 33480

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53400

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1112008

Other (OTH) AF: 0.00 AC: 0 AN: 60396

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.83
BayesDel_addAF	Pathogenic	0.24	D
BayesDel_noAF	Uncertain	0.10
CADD	Pathogenic	29
DANN	Uncertain	1.0
DEOGEN2	Benign	0.28	T
Eigen	Pathogenic	0.88
Eigen_PC	Pathogenic	0.81
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.97	D
M_CAP	Uncertain	0.11	D
MetaRNN	Pathogenic	0.88	D
MetaSVM	Benign	-0.71	T
MutationAssessor	Pathogenic	3.4	M
PhyloP100		7.2
PrimateAI	Uncertain	0.71	T
PROVEAN	Uncertain	-2.8	D
REVEL	Uncertain	0.48
Sift	Pathogenic	0.0	D
Sift4G	Uncertain	0.0050	D
Polyphen		1.0	D
Vest4		0.83
MutPred		0.70		Loss of catalytic residue at V156 (P = 0.0231)
MVP		0.65
MPC		0.61
ClinPred		0.99	D
GERP RS		5.6
Varity_R		0.87
gMVP		0.75
Mutation Taster		=29/71	disease causing

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.030		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs367979659; hg19: chr12-109527827;