Genetic Variant NM_005460.4:c.1816C>T (chr5-122450663-C-T) – ACMG Classification: Likely_benign (-6 pts)

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 0P and 6B. BP4_ModerateBS2

The NM_005460.4(SNCAIP):c.1816C>T(p.Arg606Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000706 in 1,614,012 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 (★).

Frequency

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

Exomes 𝑓: 0.000070 ( 0 hom. )

Consequence

SNCAIP
NM_005460.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.39

Variant links:

Genes affected

SNCAIP (HGNC:11139): (synuclein alpha interacting protein) This gene encodes a protein containing several protein-protein interaction domains, including ankyrin-like repeats, a coiled-coil domain, and an ATP/GTP-binding motif. The encoded protein interacts with alpha-synuclein in neuronal tissue and may play a role in the formation of cytoplasmic inclusions and neurodegeneration. A mutation in this gene has been associated with Parkinson's disease. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Apr 2015]

SNCAIP links:

MGC32805 (HGNC:):

MGC32805 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -6 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.23869824).

BS2

High AC in GnomAd4 at 11 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SNCAIP	NM_005460.4 link	c.1816C>T	p.Arg606Trp	missense_variant	Exon 10 of 11	ENST00000261368.13	NP_005451.2	Q9Y6H5-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SNCAIP	ENST00000261368.13 link	c.1816C>T	p.Arg606Trp	missense_variant	Exon 10 of 11	1	NM_005460.4	ENSP00000261368.8		Q9Y6H5-1

Frequencies

GnomAD3 genomes

AF:

0.0000723

AC:

AN:

152168

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000327

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000882

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000917

AC:

AN:

250706

Hom.:

AF XY:

0.0000957

AC XY:

AN XY:

135796

show subpopulations

Gnomad AFR exome

AF:

0.0000631

Gnomad AMR exome

AF:

0.000260

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000106

Gnomad OTH exome

AF:

0.000164

GnomAD4 exome

AF:

0.0000705

AC:

103

AN:

1461844

Hom.:

Cov.:

AF XY:

0.0000784

AC XY:

AN XY:

727240

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.000246

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:

0.0000764

Gnomad4 OTH exome

AF:

0.0000662

GnomAD4 genome

AF:

0.0000723

AC:

AN:

152168

Hom.:

Cov.:

AF XY:

0.0000807

AC XY:

AN XY:

74338

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000327

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000882

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000165

Hom.:

Bravo

AF:

0.000132

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000233

AC:

ExAC

AF:

0.0000906

AC:

EpiCase

AF:

0.000109

EpiControl

AF:

0.000237

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jul 05, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.1816C>T (p.R606W) alteration is located in exon 10 (coding exon 9) of the SNCAIP gene. This alteration results from a C to T substitution at nucleotide position 1816, causing the arginine (R) at amino acid position 606 to be replaced by a tryptophan (W). 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

0.12

BayesDel_addAF

Benign

-0.23

BayesDel_noAF

Benign

-0.26

CADD

Uncertain

DANN

Pathogenic

1.0

DEOGEN2

Benign

0.10

.;T;.;.

Eigen

Uncertain

0.37

Eigen_PC

Uncertain

0.35

FATHMM_MKL

Uncertain

0.93

LIST_S2

Uncertain

0.90

D;D;D;D

M_CAP

Benign

0.017

MetaRNN

Benign

0.24

T;T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

1.8

.;L;.;.

PrimateAI

Uncertain

0.50

PROVEAN

Benign

-2.0

N;N;N;N

REVEL

Benign

0.16

Sift

Pathogenic

0.0

D;D;D;D

Sift4G

Uncertain

0.022

D;D;D;D

Polyphen

1.0

D;D;D;D

Vest4

0.59, 0.59, 0.59

MVP

0.75

MPC

0.70

ClinPred

0.25

GERP RS

4.2

Varity_R

0.18

gMVP

0.28

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

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