Genetic Variant SNF8:p.Ala136Thr (chr17-48936186-C-T) – ACMG Classification: Likely_benign (-6 pts)

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 2P and 8B. PM1BP4_StrongBS2

The NM_007241.4(SNF8):c.406G>A(p.Ala136Thr) variant causes a missense change. The variant allele was found at a frequency of 0.000113 in 1,613,706 control chromosomes in the GnomAD database, including 4 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000072 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00012 ( 4 hom. )

Consequence

SNF8
NM_007241.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 5.54

Variant links:

Genes affected

SNF8 (HGNC:17028): (SNF8 subunit of ESCRT-II) The protein encoded by this gene is a component of the endosomal sorting complex required for transport II (ESCRT-II), which regulates the movement of ubiquitinylated transmembrane proteins to the lysosome for degradation. This complex also interacts with the RNA polymerase II elongation factor (ELL) to overcome the repressive effects of ELL on RNA polymerase II activity. Several transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Nov 2015]

SNF8 links:

ENSG00000230532 (HGNC:):

ENSG00000230532 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -6 ACMG points.

PM1

In a chain Vacuolar-sorting protein SNF8 (size 257) in uniprot entity SNF8_HUMAN there are 5 pathogenic changes around while only 0 benign (100%) in NM_007241.4

BP4

Computational evidence support a benign effect (MetaRNN=0.03630531).

BS2

High Homozygotes in GnomAdExome4 at 4 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SNF8	NM_007241.4 link	c.406G>A	p.Ala136Thr	missense_variant	Exon 5 of 8	ENST00000502492.6	NP_009172.2	Q96H20-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SNF8	ENST00000502492.6 link	c.406G>A	p.Ala136Thr	missense_variant	Exon 5 of 8	1	NM_007241.4	ENSP00000421380.1		Q96H20-1

Frequencies

GnomAD3 genomes

AF:

0.0000723

AC:

AN:

152136

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00124

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000735

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000207

AC:

AN:

251442

Hom.:

AF XY:

0.000221

AC XY:

AN XY:

135902

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000491

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000980

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000879

Gnomad OTH exome

AF:

0.000651

GnomAD4 exome

AF:

0.000117

AC:

171

AN:

1461454

Hom.:

Cov.:

AF XY:

0.000157

AC XY:

114

AN XY:

727058

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.000380

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000756

Gnomad4 SAS exome

AF:

0.00145

Gnomad4 FIN exome

AF:

0.0000187

Gnomad4 NFE exome

AF:

0.0000117

Gnomad4 OTH exome

AF:

0.000166

GnomAD4 genome

AF:

0.0000722

AC:

AN:

152252

Hom.:

Cov.:

AF XY:

0.000107

AC XY:

AN XY:

74446

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00124

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000735

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000727

Hom.:

Bravo

AF:

0.0000378

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.000157

AC:

Asia WGS

AF:

0.000866

AC:

AN:

3478

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

May 29, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.406G>A (p.A136T) alteration is located in exon 5 (coding exon 5) of the SNF8 gene. This alteration results from a G to A substitution at nucleotide position 406, causing the alanine (A) at amino acid position 136 to be replaced by a threonine (T). 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

Uncertain

0.55

BayesDel_addAF

Benign

-0.18

BayesDel_noAF

Uncertain

-0.080

CADD

Benign

DANN

Uncertain

0.98

DEOGEN2

Benign

0.098

T;.

Eigen

Benign

0.18

Eigen_PC

Uncertain

0.37

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Benign

0.75

T;T

M_CAP

Benign

0.012

MetaRNN

Benign

0.036

T;T

MetaSVM

Benign

-0.71

MutationAssessor

Benign

1.9

L;L

PrimateAI

Uncertain

0.78

PROVEAN

Benign

-1.5

N;N

REVEL

Benign

0.22

Sift

Benign

0.39

T;T

Sift4G

Benign

0.45

T;T

Polyphen

0.0010

B;B

Vest4

0.39

MVP

0.27

MPC

0.36

ClinPred

0.069

GERP RS

5.9

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.21

gMVP

0.73

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.070

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over