rs1558017116

Variant names:

• chr1-150942850-A-G
• rs1558017116
• NM_001366418.1:c.674-2A>G

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PVS1_Moderate PM2

The NM_001366418.1(SETDB1):​c.674-2A>G variant causes a splice acceptor, intron change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. 3/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: SETDB1 NM_001366418.1 splice_acceptor, intron
• Scores: Splicing: ADA: 1.000
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 6.72
• Publications: 0 publications found

Genes affected

SETDB1 (HGNC:10761): (SET domain bifurcated histone lysine methyltransferase 1) This gene encodes a histone methyltransferase which regulates histone methylation, gene silencing, and transcriptional repression. This gene has been identified as a target for treatment in Huntington Disease, given that gene silencing and transcription dysfunction likely play a role in the disease pathogenesis. Alternatively spliced transcript variants of this gene have been described.[provided by RefSeq, Jun 2011]

ACMG classification

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

• PVS1: Splicing +-2 bp (donor or acceptor) variant, product NOT destroyed by NMD, known LOF gene, truncates exone, which is 0.052075278 fraction of the gene. Cryptic splice site detected, with MaxEntScore 5.7, offset of 6, new splice context is: tcccttttactcggggccAGgga. Cryptic site results in inframe change. If cryptic site found is not functional and variant results in exon loss, it results in frameshift change.
• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001366418.1. 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
	SETDB1	NM_001366418.1	MANE Select	c.674-2A>G		splice_acceptor intron	N/A	NP_001353347.1	A0A8I5KT93
	SETDB1	NM_001366417.1		c.674-2A>G		splice_acceptor intron	N/A	NP_001353346.1	A0A8I5KT93
	SETDB1	NM_001393958.1		c.674-2A>G		splice_acceptor intron	N/A	NP_001380887.1	A0A8I5KT93

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SETDB1	ENST00000692827.1	MANE Select	c.674-2A>G		splice_acceptor intron	N/A	ENSP00000509425.1	A0A8I5KT93
	SETDB1	ENST00000271640.9	TSL:1	c.674-2A>G		splice_acceptor intron	N/A	ENSP00000271640.5	Q15047-1
	SETDB1	ENST00000368969.8	TSL:1	c.674-2A>G		splice_acceptor intron	N/A	ENSP00000357965.4	Q15047-3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	not provided (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.26	D
BayesDel_noAF	Uncertain	0.13
CADD	Pathogenic	35
DANN	Uncertain	0.99
Eigen	Pathogenic	1.1
Eigen_PC	Pathogenic	1.0
FATHMM_MKL	Benign	0.75	D
PhyloP100		6.7
GERP RS		5.8
Mutation Taster		=2/98	disease causing

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Pathogenic	1.0
dbscSNV1_RF	Pathogenic	0.93
SpliceAI score (max)		1.0		Details are displayed if max score is > 0.2
DS_AG_spliceai		0.91		Position offset: 8
DS_AL_spliceai		1.0		Position offset: 2

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

Other links and lift over

dbSNP: rs1558017116; hg19: chr1-150915326;