Genetic Variant SCAMP3:p.Asn334Thr (chr1-155256316-T-G) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_005698.4(SCAMP3):c.1001A>C(p.Asn334Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000691 in 1,447,982 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. N334S) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.9e-7 ( 0 hom. )

Consequence

SCAMP3
NM_005698.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 0.849

Publications

0 publications found

Variant links:

Genes affected

SCAMP3 (HGNC:10565): (secretory carrier membrane protein 3) This gene encodes an integral membrane protein that belongs to the secretory carrier membrane protein family. The encoded protein functions as a carrier to the cell surface in post-golgi recycling pathways. This protein is also involved in protein trafficking in endosomal pathways. Two transcript variants encoding different isoforms have been found for this gene.[provided by RefSeq, May 2011]

SCAMP3 links:

ENSG00000303088 (HGNC:):

ENSG00000303088 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.10439038).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SCAMP3	NM_005698.4 link	c.1001A>C	p.Asn334Thr	missense_variant	Exon 9 of 9	ENST00000302631.8	NP_005689.2	O14828-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SCAMP3	ENST00000302631.8 link	c.1001A>C	p.Asn334Thr	missense_variant	Exon 9 of 9	1	NM_005698.4	ENSP00000307275.3		O14828-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.91e-7

AC:

AN:

1447982

Hom.:

Cov.:

AF XY:

0.00000139

AC XY:

AN XY:

717834

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

33124

American (AMR)

AF:

0.00

AC:

AN:

43726

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25942

East Asian (EAS)

AF:

0.00

AC:

AN:

39276

South Asian (SAS)

AF:

0.0000117

AC:

AN:

85638

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53276

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5234

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1102170

Other (OTH)

AF:

0.00

AC:

AN:

59596

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.000000), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.375

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.12

BayesDel_addAF

Benign

-0.19

BayesDel_noAF

Benign

-0.52

CADD

Benign

(source)

DANN

Benign

0.95

DEOGEN2

Benign

0.035

T;.

Eigen

Benign

-0.26

Eigen_PC

Benign

-0.15

FATHMM_MKL

Uncertain

0.85

M_CAP

Benign

0.0086

MetaRNN

Benign

0.10

T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

1.7

L;.

PhyloP100

0.85

PrimateAI

Uncertain

0.55

PROVEAN

Benign

-2.0

N;N

REVEL

Benign

0.068

Sift

Benign

0.18

T;T

Sift4G

Benign

0.16

T;T

Polyphen

0.15

B;B

Vest4

0.36

MutPred

0.15

Gain of glycosylation at N334 (P = 0.0103);.;

MVP

0.28

MPC

0.27

ClinPred

0.47

GERP RS

4.4

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.13

gMVP

0.56

Mutation Taster

=54/46

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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chr1-155256316-T-G

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over