Genetic Variant SMG7:p.Asn536Thr (chr1-183542267-A-C) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_001375584.1(SMG7):c.1607A>C(p.Asn536Thr) 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 1,461,828 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 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. N536S) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000021 ( 0 hom. )

Consequence

SMG7
NM_001375584.1 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -0.542

Variant links:

Genes affected

SMG7 (HGNC:16792): (SMG7 nonsense mediated mRNA decay factor) This gene encodes a protein that is essential for nonsense-mediated mRNA decay (NMD); a process whereby transcripts with premature termination codons are targeted for rapid degradation by a mRNA decay complex. The mRNA decay complex consists, in part, of this protein along with proteins SMG5 and UPF1. The N-terminal domain of this protein is thought to mediate its association with SMG5 or UPF1 while the C-terminal domain interacts with the mRNA decay complex. This protein may therefore couple changes in UPF1 phosphorylation state to the degradation of NMD-candidate transcripts. Alternative splicing results in multiple transcript variants encoding distinct isoforms. [provided by RefSeq, Aug 2011]

SMG7 links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.043168098).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SMG7	NM_001375584.1 link	c.1607A>C	p.Asn536Thr	missense_variant	Exon 14 of 23	ENST00000688051.1	NP_001362513.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SMG7	ENST00000688051.1 link	c.1607A>C	p.Asn536Thr	missense_variant	Exon 14 of 23		NM_001375584.1	ENSP00000510175.1		A0A8I5KYV3

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000399

AC:

AN:

250452

Hom.:

AF XY:

0.00

AC XY:

AN XY:

135350

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

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:

0.00000886

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000205

AC:

AN:

1461828

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

727226

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:

0.00000270

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.062

BayesDel_addAF

Benign

-0.29

BayesDel_noAF

Benign

-0.66

CADD

Benign

0.042

DANN

Benign

0.72

DEOGEN2

Benign

0.011

.;.;T;T;.;.

Eigen

Benign

-0.91

Eigen_PC

Benign

-0.82

FATHMM_MKL

Benign

0.45

LIST_S2

Uncertain

0.94

D;D;D;D;D;D

M_CAP

Benign

0.0055

MetaRNN

Benign

0.043

T;T;T;T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.34

.;.;.;N;N;N

PrimateAI

Benign

0.29

PROVEAN

Benign

-0.77

N;N;N;N;N;N

REVEL

Benign

0.086

Sift

Benign

0.26

T;D;T;T;T;T

Sift4G

Benign

0.65

T;T;T;T;T;T

Polyphen

0.0020

B;.;.;B;.;B

Vest4

0.17

MutPred

0.20

Gain of glycosylation at N565 (P = 0.0413);.;.;.;.;.;

MVP

0.26

MPC

0.15

ClinPred

0.019

GERP RS

-2.8

Varity_R

0.046

gMVP

0.059

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

Computational scores

Splicing

Publications

LitVar

Other links and lift over