chr1-44219807-T-G

Variant names:

• chr1-44219807-T-G
• NM_019100.5:c.980T>G

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_019100.5(DMAP1):​c.980T>G​(p.Met327Arg) variant causes a missense, splice region change. The variant allele was found at a frequency of 0.000000684 in 1,461,722 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 2/3 splice prediction tools predict no significant impact on normal splicing. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: DMAP1 NM_019100.5 missense, splice_region
• Scores: Splicing: ADA: 0.3413
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 7.17

Genes affected

DMAP1 (HGNC:18291): (DNA methyltransferase 1 associated protein 1) This gene encodes a subunit of several, distinct complexes involved in the repression or activation of transcription. The encoded protein can independently repress transcription and is targeted to replication foci throughout S phase by interacting directly with the N-terminus of DNA methyltransferase 1. During late S phase, histone deacetylase 2 is added to this complex, providing a means to deacetylate histones in transcriptionally inactive heterochromatin following replication. The encoded protein is also a component of the nucleosome acetyltransferase of H4 complex and interacts with the transcriptional corepressor tumor susceptibility gene 101 and the pro-apoptotic death-associated protein 6, among others. Alternatively spliced transcript variants encoding the same protein have been described. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.901

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DMAP1	NM_019100.5	c.980T>G	p.Met327Arg	missense_variant, splice_region_variant	Exon 8 of 10	ENST00000372289.7	NP_061973.1
DMAP1	NM_001034023.2	c.980T>G	p.Met327Arg	missense_variant, splice_region_variant	Exon 9 of 11		NP_001029195.1
DMAP1	NM_001034024.2	c.980T>G	p.Met327Arg	missense_variant, splice_region_variant	Exon 9 of 11		NP_001029196.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DMAP1	ENST00000372289.7	c.980T>G	p.Met327Arg	missense_variant, splice_region_variant	Exon 8 of 10	1	NM_019100.5	ENSP00000361363.2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461722 Hom.: 0 Cov.: 32 AF XY: 0.00000138 AC XY: 1 AN XY: 727162

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

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: 8.99e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.98
BayesDel_addAF	Pathogenic	0.42	D
BayesDel_noAF	Pathogenic	0.37
CADD	Pathogenic	34
DANN	Uncertain	0.98
DEOGEN2	Uncertain	0.59	D;D;D
Eigen	Uncertain	0.48
Eigen_PC	Uncertain	0.40
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Uncertain	0.91	.;.;D
M_CAP	Benign	0.023	T
MetaRNN	Pathogenic	0.90	D;D;D
MetaSVM	Uncertain	-0.27	T
MutationAssessor	Benign	1.6	L;L;L
PrimateAI	Pathogenic	0.90	D
PROVEAN	Pathogenic	-4.6	D;D;D
REVEL	Uncertain	0.56
Sift	Uncertain	0.0010	D;D;D
Sift4G	Pathogenic	0.0010	D;D;D
Polyphen		0.96	D;D;D
Vest4		0.93
MutPred		0.76		Gain of methylation at K328 (P = 0.021);Gain of methylation at K328 (P = 0.021);Gain of methylation at K328 (P = 0.021);
MVP		0.48
MPC		0.85
ClinPred		0.99	D
GERP RS		4.0
Varity_R		0.90
gMVP		0.94

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.34
dbscSNV1_RF	Benign	0.71
SpliceAI score (max)		0.22		Details are displayed if max score is > 0.2
DS_AG_spliceai		0.22		Position offset: -46

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

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr1-44685479;