1-160619843-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PM4

The ENST00000538290.2(SLAMF1):c.880C>T(p.Arg294Ter) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000549 in 1,456,280 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Variant results in nonsense mediated mRNA decay.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000055 (0 hom.)
• Consequence: SLAMF1 ENST00000538290.2 stop_gained
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.561

Genes affected

SLAMF1 (HGNC:10903): (signaling lymphocytic activation molecule family member 1) Enables SH2 domain binding activity and identical protein binding activity. Involved in several processes, including negative regulation of CD40 signaling pathway; negative regulation of cytokine production; and positive regulation of MAPK cascade. Located in extracellular exosome. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PM4: Stoplost variant in ENST00000538290.2 Downstream stopcodon found after 17 codons.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SLAMF1	NM_003037.5	c.797C>T	p.Thr266Met	missense_variant	5/7	ENST00000302035.11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SLAMF1	ENST00000538290.2	c.880C>T	p.Arg294Ter	stop_gained	6/8	1
SLAMF1	ENST00000302035.11	c.797C>T	p.Thr266Met	missense_variant	5/7	1	NM_003037.5	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000549 AC: 8 AN: 1456280 Hom.: 0 Cov.: 29 AF XY: 0.00000690 AC XY: 5 AN XY: 724932

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: 0.00000632

Gnomad4 OTH exome AF: 0.0000166

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Apr 18, 2023

The c.797C>T (p.T266M) alteration is located in exon 5 (coding exon 5) of the SLAMF1 gene. This alteration results from a C to T substitution at nucleotide position 797, causing the threonine (T) at amino acid position 266 to be replaced by a methionine (M). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.090
BayesDel_addAF	Benign	0.0035	T
BayesDel_noAF	Benign	-0.57
Cadd	Benign	21
Dann	Uncertain	1.0
Eigen	Benign	-0.093
Eigen_PC	Benign	-0.22
FATHMM_MKL	Benign	0.14	N
M_CAP	Benign	0.024	T
MutationTaster	Benign	1.0	N;N;N;N
Vest4		0.81
ClinPred		0.49	T
GERP RS		3.4

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.10		Details are displayed if max score is > 0.2

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

Publications

LitVar

Other links and lift over

dbSNP: rs1570974645; hg19: chr1-160589633;