Variant 5-176626449-G-C details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2PP3

The NM_003085.5(SNCB):c.231C>G(p.Ile77Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000205 in 1,461,756 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000021 ( 0 hom. )

Consequence

SNCB
NM_003085.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.543

Variant links:

Genes affected

SNCB (HGNC:11140): (synuclein beta) This gene encodes a member of a small family of proteins that inhibit phospholipase D2 and may function in neuronal plasticity. The encoded protein is abundant in lesions of patients with Alzheimer disease. A mutation in this gene was found in individuals with dementia with Lewy bodies. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Dec 2015]

SNCB links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.826

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SNCB	NM_003085.5 linkuse as main transcript	c.231C>G	p.Ile77Met	missense_variant	4/6	ENST00000393693.7	NP_003076.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SNCB	ENST00000393693.7 linkuse as main transcript	c.231C>G	p.Ile77Met	missense_variant	4/6	1	NM_003085.5	ENSP00000377296	P1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000205

AC:

AN:

1461756

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

727192

show subpopulations

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:

0.00000180

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

Cov.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Sep 29, 2022

The c.231C>G (p.I77M) alteration is located in exon 5 (coding exon 3) of the SNCB gene. This alteration results from a C to G substitution at nucleotide position 231, causing the isoleucine (I) at amino acid position 77 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

Uncertain

0.38

BayesDel_addAF

Pathogenic

0.18

BayesDel_noAF

Uncertain

0.030

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Uncertain

0.72

D;T;D;D;D

Eigen

Benign

-0.24

Eigen_PC

Benign

-0.38

FATHMM_MKL

Benign

0.33

LIST_S2

Uncertain

0.92

.;D;.;.;D

M_CAP

Uncertain

0.14

MetaRNN

Pathogenic

0.83

D;D;D;D;D

MetaSVM

Uncertain

0.093

MutationAssessor

Benign

1.5

L;.;L;L;L

MutationTaster

Benign

1.0

D;D;D;D

PrimateAI

Uncertain

0.66

PROVEAN

Benign

-1.9

N;.;N;N;N

REVEL

Pathogenic

0.68

Sift

Benign

0.043

D;.;D;D;D

Sift4G

Uncertain

0.0070

D;D;D;D;D

Polyphen

0.96

D;.;D;D;D

Vest4

0.81

MutPred

0.70

Gain of disorder (P = 0.0249);.;Gain of disorder (P = 0.0249);Gain of disorder (P = 0.0249);Gain of disorder (P = 0.0249);

MVP

0.77

MPC

1.5

ClinPred

0.93

GERP RS

-0.89

Varity_R

0.24

gMVP

0.55

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

No publications associated with this variant yet.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over