rs1017280418

Variant names:

• chr18-2656102-T-A
• NM_015295.3:c.27T>A

Your query was ambiguous. Multiple possible variants found:

• chr18-2656102-T-A
• chr18-2656102-T-C

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP7

The NM_015295.3(SMCHD1):​c.27T>A​(p.Pro9Pro) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000792 in 1,262,916 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: not found (cov: 33)
  • Exomes 𝑓: 7.9e-7 (0 hom.)
• Consequence: SMCHD1 NM_015295.3 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.796

Genes affected

SMCHD1 (HGNC:29090): (structural maintenance of chromosomes flexible hinge domain containing 1) This gene encodes a protein which contains a hinge region domain found in members of the SMC (structural maintenance of chromosomes) protein family. [provided by RefSeq, Dec 2011]

ACMG classification

Verdict is Likely_benign. Variant got -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.87).
• BP7: Synonymous conserved (PhyloP=-0.796 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SMCHD1	NM_015295.3	c.27T>A	p.Pro9Pro	synonymous_variant	Exon 1 of 48	ENST00000320876.11	NP_056110.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SMCHD1	ENST00000320876.11	c.27T>A	p.Pro9Pro	synonymous_variant	Exon 1 of 48	5	NM_015295.3	ENSP00000326603.7
SMCHD1	ENST00000688342.1	c.27T>A	p.Pro9Pro	synonymous_variant	Exon 1 of 47			ENSP00000508422.1
SMCHD1	ENST00000684915.1	n.184T>A		non_coding_transcript_exon_variant	Exon 1 of 14

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 7.92e-7 AC: 1 AN: 1262916 Hom.: 0 Cov.: 29 AF XY: 0.00000162 AC XY: 1 AN XY: 618694

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: 9.86e-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
BayesDel_noAF	Benign	-0.87
CADD	Benign	11
DANN	Benign	0.67
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.2

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		Details are displayed if max score is > 0.2

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: chr18-2656101;