12-109088307-G-A

Variant names:

• chr12-109088307-G-A
• rs144639687
• NM_001145374.2:c.685C>T

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_001145374.2(ALKBH2):​c.685C>T​(p.Pro229Ser) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,882 control chromosomes in the GnomAD database, with no homozygous occurrence. 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. P229A) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: ALKBH2 NM_001145374.2 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 9.32
• 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 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

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.685C>T	p.Pro229Ser	missense	Exon 4 of 4	NP_001138846.1	Q6NS38-1
	ALKBH2	NM_001001655.3		c.685C>T	p.Pro229Ser	missense	Exon 4 of 4	NP_001001655.1	Q6NS38-1
	ALKBH2	NM_001145375.2		c.685C>T	p.Pro229Ser	missense	Exon 4 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.685C>T	p.Pro229Ser	missense	Exon 4 of 4	ENSP00000398181.1	Q6NS38-1
	ALKBH2	ENST00000343075.7	TSL:1	c.685C>T	p.Pro229Ser	missense	Exon 4 of 4	ENSP00000343021.3	Q6NS38-1
	ALKBH2	ENST00000440112.2	TSL:1	c.*12C>T		3_prime_UTR	Exon 2 of 2	ENSP00000399820.2	Q6NS38-2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461882 Hom.: 0 Cov.: 31 AF XY: 0.00000138 AC XY: 1 AN XY: 727240

African (AFR) AF: 0.00 AC: 0 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: 53408

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

European-Non Finnish (NFE) AF: 8.99e-7 AC: 1 AN: 1112012

Other (OTH) AF: 0.0000166 AC: 1 AN: 60396

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.47
BayesDel_addAF	Uncertain	0.057	T
BayesDel_noAF	Benign	-0.16
CADD	Pathogenic	28
DANN	Pathogenic	1.0
DEOGEN2	Benign	0.24	T
Eigen	Pathogenic	0.75
Eigen_PC	Pathogenic	0.73
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.94	D
M_CAP	Benign	0.011	T
MetaRNN	Uncertain	0.68	D
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	1.7	L
PhyloP100		9.3
PrimateAI	Uncertain	0.56	T
PROVEAN	Pathogenic	-5.8	D
REVEL	Uncertain	0.32
Sift	Benign	0.064	T
Sift4G	Uncertain	0.059	T
Polyphen		1.0	D
Vest4		0.78
MutPred		0.25		Gain of catalytic residue at P229 (P = 0.0301)
MVP		0.59
MPC		0.61
ClinPred		0.99	D
GERP RS		5.5
Varity_R		0.64
gMVP		0.51
Mutation Taster		=55/45	polymorphism

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

Other links and lift over

dbSNP: rs144639687; hg19: chr12-109526112;