chr7-93102593-G-A

Variant names:

• chr7-93102593-G-A
• rs1554336918
• NM_017654.4:c.3505C>T
• SAMD9 p.Gln1169*

Variant summary

Our verdict is Likely pathogenic. The variant received 6 ACMG points: 6P and 0B. PVS1_Strong PM2

The NM_017654.4(SAMD9):​c.3505C>T​(p.Gln1169*) variant causes a stop gained change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (no stars).

• Frequency: Genomes: not found (cov: 32)
• Consequence: SAMD9 NM_017654.4 stop_gained
• Clinical Significance: Uncertain significance no assertion criteria provided U:1
• Conservation: PhyloP100: 3.58
• Publications: 0 publications found

Genes affected

SAMD9 (HGNC:1348): (sterile alpha motif domain containing 9) This gene encodes a sterile alpha motif domain-containing protein. The encoded protein localizes to the cytoplasm and may play a role in regulating cell proliferation and apoptosis. Mutations in this gene are the cause of normophosphatemic familial tumoral calcinosis. Alternate splicing results in multiple transcript variants that encode the same protein.[provided by RefSeq, Jul 2010]

SAMD9 Gene-Disease associations (from GenCC):

• MIRAGE syndrome

  Inheritance: AD Classification: DEFINITIVE, STRONG, MODERATE, SUPPORTIVE Submitted by: PanelApp Australia, Orphanet, Genomics England PanelApp, Ambry Genetics, Labcorp Genetics (formerly Invitae), G2P
• SAMD9-related spectrum and myeloid neoplasm risk

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
• normophosphatemic familial tumoral calcinosis

  Inheritance: AR Classification: STRONG, MODERATE, SUPPORTIVE, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Orphanet, Genomics England PanelApp, Ambry Genetics, ClinGen, PanelApp Australia
• monosomy 7 myelodysplasia and leukemia syndrome 2

  Inheritance: Unknown, AD Classification: STRONG, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, PanelApp Australia

ACMG classification

Our verdict: Likely_pathogenic. The variant received 6 ACMG points.

• PVS1: Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant is located in the 3'-most exon, not predicted to undergo nonsense mediated mRNA decay. There are 11 pathogenic variants in the truncated region.
• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_017654.4. 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
	SAMD9	NM_017654.4	MANE Select	c.3505C>T	p.Gln1169*	stop_gained	Exon 3 of 3	NP_060124.2
	SAMD9	NM_001193307.2		c.3505C>T	p.Gln1169*	stop_gained	Exon 2 of 2	NP_001180236.1	Q5K651

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SAMD9	ENST00000379958.3	TSL:1 MANE Select	c.3505C>T	p.Gln1169*	stop_gained	Exon 3 of 3	ENSP00000369292.2	Q5K651
	SAMD9	ENST00000620985.4	TSL:2	c.3505C>T	p.Gln1169*	stop_gained	Exon 2 of 2	ENSP00000484636.1	Q5K651
	SAMD9	ENST00000446617.1	TSL:2	c.3505C>T	p.Gln1169*	stop_gained	Exon 2 of 2	ENSP00000414529.1	C9JKF1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: no assertion criteria provided

Pathogenic	VUS	Benign	Condition
-	1	-	Normophosphatemic familial tumoral calcinosis (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.54	D
BayesDel_noAF	Pathogenic	0.54
CADD	Pathogenic	36
DANN	Uncertain	0.99
Eigen	Pathogenic	0.80
Eigen_PC	Uncertain	0.57
FATHMM_MKL	Uncertain	0.89	D
PhyloP100		3.6
Mutation Taster		=103/97	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		Details are displayed if max score is > 0.2

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

dbSNP: rs1554336918;

hg19: chr7-92731906;