dbSNP rs141950577: SUFU:p.Leu431Leu (chr10-102617423-T-C) – ACMG Classification: Benign (-21 pts)

Variant summary

Our verdict is Benign. The variant received -21 ACMG points: 0P and 21B. BP4_StrongBP6_Very_StrongBP7BS1BS2

The NM_016169.4(SUFU):c.1291T>C(p.Leu431Leu) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000826 in 1,614,242 control chromosomes in the GnomAD database, including 8 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Synonymous variant affecting the same amino acid position (i.e. L431L) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.0044 ( 7 hom., cov: 33)

Exomes 𝑓: 0.00045 ( 1 hom. )

Consequence

SUFU
NM_016169.4 synonymous

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:8

Conservation

PhyloP100: 3.04

Publications

2 publications found

Variant links:

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]

SUFU Gene-Disease associations (from GenCC):

medulloblastoma
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), ClinGen
nevoid basal cell carcinoma syndrome
Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, Illumina, Genomics England PanelApp
basal cell nevus syndrome 2
Inheritance: AD Classification: STRONG Submitted by: G2P
ocular motor apraxia, Cogan type
Inheritance: AD Classification: STRONG Submitted by: Franklin by Genoox
Joubert syndrome 32
Inheritance: AR Classification: STRONG, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), G2P, Ambry Genetics
Joubert syndrome
Inheritance: AR, AD Classification: MODERATE, SUPPORTIVE Submitted by: Orphanet, Ambry Genetics
apraxia
Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics
ciliopathy
Inheritance: AR Classification: LIMITED Submitted by: ClinGen

SUFU links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -21 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.49).

BP6

Variant 10-102617423-T-C is Benign according to our data. Variant chr10-102617423-T-C is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 241080.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=3.04 with no splicing effect.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00443 (675/152350) while in subpopulation AFR AF = 0.0155 (643/41570). AF 95% confidence interval is 0.0145. There are 7 homozygotes in GnomAd4. There are 290 alleles in the male GnomAd4 subpopulation. Median coverage is 33. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 7 AD,AR gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_016169.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SUFU	NM_016169.4	MANE Select	c.1291T>C	p.Leu431Leu	synonymous	Exon 10 of 12	NP_057253.2
	SUFU	NM_001178133.2		c.1291T>C	p.Leu431Leu	synonymous	Exon 10 of 11	NP_001171604.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
SUFU	ENST00000369902.8	TSL:1 MANE Select	c.1291T>C	p.Leu431Leu	synonymous	Exon 10 of 12	ENSP00000358918.4
SUFU	ENST00000423559.2	TSL:1	c.1291T>C	p.Leu431Leu	synonymous	Exon 10 of 10	ENSP00000411597.2
SUFU	ENST00000369899.6	TSL:1	c.1291T>C	p.Leu431Leu	synonymous	Exon 10 of 11	ENSP00000358915.2

Frequencies

GnomAD3 genomes

AF:

0.00439

AC:

668

AN:

152232

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0153

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00131

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000414

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000735

Gnomad OTH

AF:

0.00239

GnomAD2 exomes

AF:

0.00117

AC:

294

AN:

251474

AF XY:

0.000824

show subpopulations

Gnomad AFR exome

AF:

0.0157

Gnomad AMR exome

AF:

0.000896

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000527

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.000450

AC:

658

AN:

1461892

Hom.:

Cov.:

AF XY:

0.000418

AC XY:

304

AN XY:

727248

show subpopulations

African (AFR)

AF:

0.0151

AC:

507

AN:

33480

American (AMR)

AF:

0.00121

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.0000348

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53420

Middle Eastern (MID)

AF:

0.00156

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.0000198

AC:

AN:

1112010

Other (OTH)

AF:

0.00104

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.487

Heterozygous variant carriers

127

170

212

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

110

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00443

AC:

675

AN:

152350

Hom.:

Cov.:

AF XY:

0.00389

AC XY:

290

AN XY:

74506

show subpopulations

African (AFR)

AF:

0.0155

AC:

643

AN:

41570

American (AMR)

AF:

0.00131

AC:

AN:

15310

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5190

South Asian (SAS)

AF:

0.000207

AC:

AN:

4828

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10630

Middle Eastern (MID)

AF:

0.00340

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000735

AC:

AN:

68032

Other (OTH)

AF:

0.00237

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.502

Heterozygous variant carriers

110

147

184

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00306

Hom.:

Bravo

AF:

0.00517

Asia WGS

AF:

0.000577

AC:

AN:

3478

EpiCase

AF:

0.0000545

EpiControl

AF:

0.000178

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:8

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:2

Nov 19, 2018

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Variant summary: SUFU c.1291T>C alters a conserved nucleotide resulting in a synonymous change. 5/5 computational tools predict no significant impact on normal splicing. However, these predictions have yet to be confirmed by functional studies. The variant allele was found at a frequency of 0.0015 in 277202 control chromosomes in the gnomAD database, including 4 homozygotes. The observed variant frequency is approximately 1489-folds higher than the estimated maximal expected allele frequency for a pathogenic variant in SUFU causing Nevoid Basal Cell Carcinoma Syndrome (Gorlin Syndrome) phenotype (1e-06), strongly suggesting that the variant is benign. To our knowledge, no occurrence of c.1291T>C in individuals affected with Nevoid Basal Cell Carcinoma Syndrome (Gorlin Syndrome) and no experimental evidence demonstrating its impact on protein function have been reported. Three ClinVar submissions from clinical diagnostic laboratories (evaluation after 2014) cite the variant twice as benign and once as uncertain significance. Based on the evidence outlined above, the variant was classified as benign.

Jun 04, 2021

Quest Diagnostics Nichols Institute San Juan Capistrano

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

not provided

Benign:2

Apr 26, 2021

GeneDx

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Breakthrough Genomics, Breakthrough Genomics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:not provided

Medulloblastoma;C3551915:Familial meningioma;C4540342:Joubert syndrome 32;C5830451:Basal cell nevus syndrome 2

Benign:1

Jul 12, 2024

Department of Pathology and Laboratory Medicine, Sinai Health System

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Gorlin syndrome;C0025149:Medulloblastoma

Benign:1

Jan 29, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Medulloblastoma

Benign:1

Jan 13, 2018

Illumina Laboratory Services, Illumina

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as likely benign is not then subjected to further curation. The score for this variant resulted in a classification of likely benign for this disease.

Hereditary cancer-predisposing syndrome

Benign:1

Mar 08, 2017

Ambry Genetics

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This alteration is classified as benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity.

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.49

CADD

Benign

8.2

(source)

DANN

Benign

0.74

PhyloP100

3.0

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Mutation Taster

=98/2

polymorphism

(source)

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over