Variant chr22-43963386-A-C details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2BP4

The NM_015380.5(SAMM50):c.122A>C(p.Glu41Ala) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000688 in 1,454,030 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: not found (cov: 31)

Exomes 𝑓: 6.9e-7 ( 0 hom. )

Consequence

SAMM50
NM_015380.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 7.71

Variant links:

Genes affected

SAMM50 (HGNC:24276): (SAMM50 sorting and assembly machinery component) This gene encodes a component of the Sorting and Assembly Machinery (SAM) of the mitochondrial outer membrane. The Sam complex functions in the assembly of beta-barrel proteins into the outer mitochondrial membrane.[provided by RefSeq, Jun 2011]

SAMM50 links:

PNPLA3 (HGNC:18590): (patatin like phospholipase domain containing 3) The protein encoded by this gene is a triacylglycerol lipase that mediates triacylglycerol hydrolysis in adipocytes. The encoded protein, which appears to be membrane bound, may be involved in the balance of energy usage/storage in adipocytes. [provided by RefSeq, Jul 2008]

PNPLA3 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.36775035).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SAMM50	NM_015380.5 linkuse as main transcript	c.122A>C	p.Glu41Ala	missense_variant	2/15	ENST00000350028.5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris
SAMM50	ENST00000350028.5 linkuse as main transcript	c.122A>C	p.Glu41Ala	missense_variant	2/15	1	NM_015380.5	P1
PNPLA3	ENST00000406117.6 linkuse as main transcript	c.*950A>C		3_prime_UTR_variant, NMD_transcript_variant	9/10	2
SAMM50	ENST00000493161.1 linkuse as main transcript	n.314+160A>C		intron_variant, non_coding_transcript_variant		3

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.88e-7

AC:

AN:

1454030

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

723738

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:

9.03e-7

Gnomad4 OTH exome

AF:

0.00

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

May 27, 2022

The c.122A>C (p.E41A) alteration is located in exon 2 (coding exon 2) of the SAMM50 gene. This alteration results from a A to C substitution at nucleotide position 122, causing the glutamic acid (E) at amino acid position 41 to be replaced by an alanine (A). 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

0.33

BayesDel_addAF

Benign

-0.035

BayesDel_noAF

Benign

-0.29

CADD

Uncertain

DANN

Uncertain

0.99

DEOGEN2

Benign

0.059

Eigen

Benign

0.091

Eigen_PC

Benign

0.21

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.96

M_CAP

Benign

0.011

MetaRNN

Benign

0.37

MetaSVM

Benign

-1.1

MutationAssessor

Uncertain

2.4

MutationTaster

Benign

1.0

D;D

PrimateAI

Pathogenic

0.80

PROVEAN

Benign

-1.9

REVEL

Benign

0.16

Sift

Uncertain

0.016

Sift4G

Uncertain

0.043

Polyphen

0.43

Vest4

0.55

MutPred

0.44

Loss of solvent accessibility (P = 0.0062);

MVP

0.62

MPC

0.39

ClinPred

0.95

GERP RS

4.4

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.17

gMVP

0.38

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