21-28736880-C-T

Variant names:

• chr21-28736880-C-T
• rs2251447
• ENST00000824757.1:n.57+35114G>A

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The ENST00000824757.1(ENSG00000232855):​n.57+35114G>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000066 in 151,420 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.0000066 (0 hom., cov: 31)
• Consequence: ENSG00000232855 ENST00000824757.1 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -1.04
• Publications: 1 publications found

Genes affected

ENSG00000232855 (HGNC:58104):

HEMK2 (HGNC:16021): (N-6 adenine-specific DNA methyltransferase 1) This gene encodes an N(6)-adenine-specific DNA methyltransferase. The encoded enzyme may be involved in the methylation of release factor I during translation termination. This enzyme is also involved in converting the arsenic metabolite monomethylarsonous acid to the less toxic dimethylarsonic acid. Alternative splicing of this gene results in multiple transcript variants. A related pseudogene has been identified on chromosome 11. [provided by RefSeq, Mar 2023]

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.9).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
HEMK2	XR_007067787.1	n.936+85025G>A		intron_variant	Intron 8 of 8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ENSG00000232855	ENST00000824757.1	n.57+35114G>A		intron_variant	Intron 1 of 8
ENSG00000232855	ENST00000824758.1	n.147+35114G>A		intron_variant	Intron 1 of 11
ENSG00000232855	ENST00000824759.1	n.139+35114G>A		intron_variant	Intron 1 of 8

Frequencies

GnomAD3 genomes AF: 0.00000660 AC: 1 AN: 151420 Hom.: 0 Cov.: 31

Gnomad AFR AF: 0.00

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: 0.0000966

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.00000660 AC: 1 AN: 151420 Hom.: 0 Cov.: 31 AF XY: 0.0000135 AC XY: 1 AN XY: 73904

African (AFR) AF: 0.00 AC: 0 AN: 41154

American (AMR) AF: 0.00 AC: 0 AN: 15222

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3468

East Asian (EAS) AF: 0.00 AC: 0 AN: 5160

South Asian (SAS) AF: 0.00 AC: 0 AN: 4816

European-Finnish (FIN) AF: 0.0000966 AC: 1 AN: 10350

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 314

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 67940

Other (OTH) AF: 0.00 AC: 0 AN: 2086

Alfa AF: 0.00 Hom.: 169

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.90
CADD	Benign	0.63
DANN	Benign	0.66
PhyloP100		-1.0

Splicing

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

Other links and lift over

dbSNP: rs2251447; hg19: chr21-30109202;