21-28778098-G-C

Variant names:

• chr21-28778098-G-C
• rs8130766
• ENST00000824773.1:n.100+43807C>G

Variant summary

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

The ENST00000824773.1(ENSG00000232855):​n.100+43807C>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 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: not found (cov: 32)
• Consequence: ENSG00000232855 ENST00000824773.1 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.0820
• Publications: 3 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=-1.09).

Variant Effect in Transcripts

ACMG analysis was done for transcript: ENST00000824773.1. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ENSG00000232855	ENST00000824773.1		n.100+43807C>G		intron	N/A
	ENSG00000232855	ENST00000824774.1		n.119+43807C>G		intron	N/A
	ENSG00000232855	ENST00000824775.1		n.104+43807C>G		intron	N/A

Frequencies

GnomAD3 genomes Cov.: 32

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

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 165

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-1.1
CADD	Benign	0.54
DANN	Benign	0.31
PhyloP100		0.082

Splicing

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

Other links and lift over

dbSNP: rs8130766; hg19: chr21-30150420;