10-102592724-G-A

Position:

• chr10-102592724-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2 PP3

The NM_016169.4(SUFU):​c.597G>A​(p.Gln199=) variant causes a splice region, synonymous change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign 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: SUFU NM_016169.4 splice_region, synonymous
• Scores: Splicing: ADA: 0.9918
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 9.60

Genes affected

SUFU (HGNC:16466): (SUFU negative regulator of hedgehog signaling) The Hedgehog signaling pathway plays an important role in early human development. The pathway is a signaling cascade that plays a role in pattern formation and cellular proliferation during development. This gene encodes a negative regulator of the hedgehog signaling pathway. Defects in this gene are a cause of medulloblastoma. Alternative splicing results in multiple transcript variants.[provided by RefSeq, May 2010]

ACMG classification

Verdict is Uncertain_significance. Variant got 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: Splicing scoreres supports a deletorius effect: Scorers claiming Pathogenic: dbscSNV1_ADA, dbscSNV1_RF, max_spliceai. No scorers claiming Uncertain. No scorers claiming Benign.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SUFU	NM_016169.4	c.597G>A	p.Gln199=	splice_region_variant, synonymous_variant	4/12	ENST00000369902.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SUFU	ENST00000369902.8	c.597G>A	p.Gln199=	splice_region_variant, synonymous_variant	4/12	1	NM_016169.4	P1
SUFU	ENST00000423559.2	c.597G>A	p.Gln199=	splice_region_variant, synonymous_variant	4/10	1
SUFU	ENST00000369899.6	c.597G>A	p.Gln199=	splice_region_variant, synonymous_variant	4/11	1
SUFU	ENST00000471000.1	n.379G>A		splice_region_variant, non_coding_transcript_exon_variant	2/6	5

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Gorlin syndrome;C0025149:Medulloblastoma Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Mar 31, 2018

This variant is not present in population databases (ExAC no frequency). This sequence change affects codon 199 of the SUFU mRNA. It is a 'silent' change, meaning that it does not change the encoded amino acid sequence of the SUFU protein. This variant also falls at the last nucleotide of exon 4 of the SUFU coding sequence, which is part of the consensus splice site for this exon. Nucleotide substitutions within the consensus splice site are relatively common causes of aberrant splicing (PMID: 17576681, 9536098). This variant has not been reported in the literature in individuals with SUFU-related disease. ClinVar contains an entry for this variant (Variation ID: 406393). Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may disrupt the consensus splice site, but this prediction has not been confirmed by published transcriptional studies. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.36
CADD	Uncertain	24
DANN	Benign	0.89

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Pathogenic	0.99
dbscSNV1_RF	Pathogenic	0.88
SpliceAI score (max)		0.73		Details are displayed if max score is > 0.2
DS_DG_spliceai		0.61		Position offset: 11
DS_DL_spliceai		0.73		Position offset: 0

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

Publications

LitVar

Other links and lift over

dbSNP: rs1060501112; hg19: chr10-104352481; COSMIC: COSV100882848; COSMIC: COSV100882848;