4-1814530-C-T

Variant names:

Variant summary

Our verdict is Likely benign. Variant got -1 ACMG points: 2P and 3B. PM2BP4_ModerateBS1_Supporting

The NM_012318.3(LETM1):c.2114G>A(p.Ser705Asn) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000607 in 1,613,808 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000026 ( 0 hom., cov: 34)

Exomes 𝑓: 0.000064 ( 0 hom. )

Consequence

LETM1
NM_012318.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.65

Variant links:

Genes affected

LETM1 (HGNC:6556): (leucine zipper and EF-hand containing transmembrane protein 1) This gene encodes a protein that is localized to the inner mitochondrial membrane. The protein functions to maintain the mitochondrial tubular shapes and is required for normal mitochondrial morphology and cellular viability. Mutations in this gene cause Wolf-Hirschhorn syndrome, a complex malformation syndrome caused by the deletion of parts of the distal short arm of chromosome 4. Related pseudogenes have been identified on chromosomes 8, 15 and 19. [provided by RefSeq, Oct 2009]

LETM1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.104602784).

BS1

Variant frequency is greater than expected in population nfe. gnomad4_exome allele frequency = 0.0000643 (94/1461530) while in subpopulation NFE AF= 0.0000738 (82/1111838). AF 95% confidence interval is 0.0000606. There are 0 homozygotes in gnomad4_exome. There are 46 alleles in male gnomad4_exome subpopulation. Median coverage is 32. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
LETM1	NM_012318.3 link	c.2114G>A	p.Ser705Asn	missense_variant	Exon 14 of 14	ENST00000302787.3	NP_036450.1	O95202-1
LETM1	XM_006713884.2 link	c.2111G>A	p.Ser704Asn	missense_variant	Exon 14 of 14		XP_006713947.1
LETM1	XM_047415673.1 link	c.1571G>A	p.Ser524Asn	missense_variant	Exon 13 of 13		XP_047271629.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
LETM1	ENST00000302787.3 link	c.2114G>A	p.Ser705Asn	missense_variant	Exon 14 of 14	1	NM_012318.3	ENSP00000305653.2		O95202-1

Frequencies

GnomAD3 genomes

AF:

0.0000263

AC:

AN:

152278

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.0000588

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000201

AC:

AN:

249278

Hom.:

AF XY:

0.00

AC XY:

AN XY:

134884

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:

0.0000446

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000643

AC:

AN:

1461530

Hom.:

Cov.:

AF XY:

0.0000633

AC XY:

AN XY:

727016

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:

0.0000738

Gnomad4 OTH exome

AF:

0.000199

GnomAD4 genome

AF:

0.0000263

AC:

AN:

152278

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74400

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000588

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000227

TwinsUK

AF:

0.00

AC:

ALSPAC

AF:

0.000259

AC:

ExAC

AF:

0.0000165

AC:

EpiCase

AF:

0.000109

EpiControl

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Feb 27, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.2114G>A (p.S705N) alteration is located in exon 14 (coding exon 14) of the LETM1 gene. This alteration results from a G to A substitution at nucleotide position 2114, causing the serine (S) at amino acid position 705 to be replaced by an asparagine (N). 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

0.084

BayesDel_addAF

Benign

-0.30

BayesDel_noAF

Benign

-0.54

CADD

Benign

DANN

Benign

0.97

DEOGEN2

Benign

0.0038

Eigen

Benign

-0.25

Eigen_PC

Benign

-0.10

FATHMM_MKL

Benign

0.73

LIST_S2

Benign

0.85

M_CAP

Benign

0.0029

MetaRNN

Benign

0.10

MetaSVM

Benign

-1.0

MutationAssessor

Uncertain

2.0

PrimateAI

Benign

0.41

PROVEAN

Benign

-0.51

REVEL

Benign

0.033

Sift

Benign

0.17

Sift4G

Benign

0.34

Polyphen

0.0030

Vest4

0.12

MutPred

0.11

Loss of glycosylation at S705 (P = 0.0563);

MVP

0.69

MPC

0.39

ClinPred

0.083

GERP RS

4.0

Varity_R

0.032

gMVP

0.25

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.20

Details are displayed if max score is > 0.2

DS_AG_spliceai

0.20

Position offset: -5

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