3-69109114-A-T

Variant summary

Our verdict is Likely benign. Variant got -1 ACMG points: 0P and 1B. BP4

The NM_198271.5(LMOD3):c.1664T>A(p.Leu555Gln) variant causes a missense change. The variant allele was found at a frequency of 0.00039 in 1,602,796 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.00018 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00041 ( 2 hom. )

Consequence

LMOD3
NM_198271.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 6.34

Variant links:

Genes affected

LMOD3 (HGNC:6649): (leiomodin 3) The protein encoded by this gene is a member of the leiomodin family of proteins. This protein contains three actin-binding domains, a tropomyosin domain, a leucine-rich repeat domain, and a Wiskott-Aldrich syndrome protein homology 2 domain (WH2). Localization of this protein to the pointed ends of thin filaments has been observed, and there is evidence that this protein acts as a catalyst of actin nucleation, and is important to the organization of sarcomeric thin filaments in skeletal muscles. Mutations in this gene have been associated as one cause of Nemaline myopathy, as other genes have also been linked to this disorder. Nemaline myopathy is a disorder characterized by nonprogressive generalized muscle weakness and protein inclusions (nemaline bodies) in skeletal myofibers. Patients with mutations in this gene often present with a severe congenital form of the disorder. [provided by RefSeq, Jan 2015]

LMOD3 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -1 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.31011128).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
LMOD3	NM_198271.5 linkuse as main transcript	c.1664T>A	p.Leu555Gln	missense_variant	3/3	ENST00000420581.7
LMOD3	NM_001304418.3 linkuse as main transcript	c.1664T>A	p.Leu555Gln	missense_variant	4/4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
LMOD3	ENST00000420581.7 linkuse as main transcript	c.1664T>A	p.Leu555Gln	missense_variant	3/3	1	NM_198271.5	P1	Q0VAK6-1
LMOD3	ENST00000475434.1 linkuse as main transcript	c.1664T>A	p.Leu555Gln	missense_variant	4/4	5		P1	Q0VAK6-1
LMOD3	ENST00000489031.5 linkuse as main transcript	c.1664T>A	p.Leu555Gln	missense_variant	4/4	2		P1	Q0VAK6-1

Frequencies

GnomAD3 genomes

AF:

0.000184

AC:

AN:

152188

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000145

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

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:

0.000294

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000206

AC:

AN:

228054

Hom.:

AF XY:

0.000268

AC XY:

AN XY:

123184

show subpopulations

Gnomad AFR exome

AF:

0.0000708

Gnomad AMR exome

AF:

0.0000613

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:

0.000415

Gnomad OTH exome

AF:

0.000352

GnomAD4 exome

AF:

0.000412

AC:

597

AN:

1450608

Hom.:

Cov.:

AF XY:

0.000404

AC XY:

291

AN XY:

720264

show subpopulations

Gnomad4 AFR exome

AF:

0.0000899

Gnomad4 AMR exome

AF:

0.0000924

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:

0.000512

Gnomad4 OTH exome

AF:

0.000383

GnomAD4 genome

AF:

0.000184

AC:

AN:

152188

Hom.:

Cov.:

AF XY:

0.0000942

AC XY:

AN XY:

74340

show subpopulations

Gnomad4 AFR

AF:

0.000145

Gnomad4 AMR

AF:

0.000131

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000294

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000427

Hom.:

Bravo

AF:

0.000151

TwinsUK

AF:

0.000809

AC:

ALSPAC

AF:

0.00

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000243

AC:

ExAC

AF:

0.000240

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Mar 20, 2023

The c.1664T>A (p.L555Q) alteration is located in exon 3 (coding exon 3) of the LMOD3 gene. This alteration results from a T to A substitution at nucleotide position 1664, causing the leucine (L) at amino acid position 555 to be replaced by a glutamine (Q). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Nemaline myopathy 10

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Oct 28, 2022

This sequence change replaces leucine, which is neutral and non-polar, with glutamine, which is neutral and polar, at codon 555 of the LMOD3 protein (p.Leu555Gln). This variant is present in population databases (rs377612351, gnomAD 0.04%). This variant has not been reported in the literature in individuals affected with LMOD3-related conditions. ClinVar contains an entry for this variant (Variation ID: 542084). Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.29

BayesDel_addAF

Benign

-0.19

BayesDel_noAF

Benign

-0.19

Cadd

Uncertain

Dann

Uncertain

0.98

DEOGEN2

Benign

0.083

T;T;T

Eigen

Benign

0.16

Eigen_PC

Uncertain

0.26

FATHMM_MKL

Uncertain

0.95

M_CAP

Benign

0.019

MetaRNN

Benign

0.31

T;T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

1.6

L;L;L

MutationTaster

Benign

1.0

D;D;D

PrimateAI

Uncertain

0.66

PROVEAN

Uncertain

-3.0

D;D;D

REVEL

Benign

0.21

Sift

Uncertain

0.0010

D;D;D

Sift4G

Uncertain

0.0040

D;D;D

Polyphen

0.43

B;B;B

Vest4

0.57

MVP

0.36

MPC

0.040

ClinPred

0.15

GERP RS

5.5

Varity_R

0.76

gMVP

0.44

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.030

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