11-65539092-C-G

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 0P and 2B. BP4_Moderate

The NM_001130144.3(LTBP3):c.3900G>C(p.Gln1300His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000119 in 1,428,114 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: 𝑓 0.0000066 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000013 ( 0 hom. )

Consequence

LTBP3
NM_001130144.3 missense

Scores

Clinical Significance

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

Conservation

PhyloP100: 1.51

Variant links:

Genes affected

LTBP3 (HGNC:6716): (latent transforming growth factor beta binding protein 3) The protein encoded by this gene forms a complex with transforming growth factor beta (TGF-beta) proteins and may be involved in their subcellular localization. Activation of this complex requires removal of the encoded binding protein. This protein also may play a structural role in the extracellular matrix. Three transcript variants encoding different isoforms have been found for this gene.[provided by RefSeq, Jan 2010]

LTBP3 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.26210606).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
LTBP3	NM_001130144.3 linkuse as main transcript	c.3900G>C	p.Gln1300His	missense_variant	28/28	ENST00000301873.11
LTBP3	NM_021070.4 linkuse as main transcript	c.3759G>C	p.Gln1253His	missense_variant	27/27
LTBP3	NM_001164266.1 linkuse as main transcript	c.3408G>C	p.Gln1136His	missense_variant	27/27

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
LTBP3	ENST00000301873.11 linkuse as main transcript	c.3900G>C	p.Gln1300His	missense_variant	28/28	2	NM_001130144.3	P1	Q9NS15-1

Frequencies

GnomAD3 genomes

AF:

0.00000659

AC:

AN:

151696

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:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000249

AC:

AN:

80458

Hom.:

AF XY:

0.00

AC XY:

AN XY:

46388

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:

0.0000629

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000125

AC:

AN:

1276418

Hom.:

Cov.:

AF XY:

0.00000959

AC XY:

AN XY:

625542

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:

0.0000147

Gnomad4 OTH exome

AF:

0.0000193

GnomAD4 genome

AF:

0.00000659

AC:

AN:

151696

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74106

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:

0.0000147

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.00000756

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Brachyolmia-amelogenesis imperfecta syndrome

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Dec 09, 2023

This sequence change replaces glutamine, which is neutral and polar, with histidine, which is basic and polar, at codon 1300 of the LTBP3 protein (p.Gln1300His). This variant is present in population databases (no rsID available, gnomAD 0.006%). This variant has not been reported in the literature in individuals affected with LTBP3-related conditions. ClinVar contains an entry for this variant (Variation ID: 2182360). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be disruptive. 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. -

LTBP3-related disorder

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

May 10, 2023

The LTBP3 c.3900G>C variant is predicted to result in the amino acid substitution p.Gln1300His. To our knowledge, this variant has not been reported in the literature. This variant is reported in 0.0063% of alleles in individuals of European (Non-Finnish) descent in gnomAD (http://gnomad.broadinstitute.org/variant/11-65306563-C-G). At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.30

BayesDel_addAF

Benign

-0.091

BayesDel_noAF

Benign

-0.19

Cadd

Uncertain

Dann

Uncertain

1.0

Eigen

Uncertain

0.37

Eigen_PC

Uncertain

0.41

FATHMM_MKL

Uncertain

0.84

LIST_S2

Benign

0.79

T;T;T;T;T

M_CAP

Uncertain

0.12

MetaRNN

Benign

0.26

T;T;T;T;T

MetaSVM

Uncertain

0.19

MutationTaster

Benign

0.87

D;D;D;D;D;D

PrimateAI

Uncertain

0.73

PROVEAN

Benign

-2.2

N;N;N;N;N

REVEL

Uncertain

0.31

Sift

Uncertain

0.014

D;D;T;T;T

Sift4G

Uncertain

0.011

D;D;T;D;T

Polyphen

0.99

D;D;.;.;D

Vest4

0.29

MutPred

0.37

.;Gain of catalytic residue at Q1300 (P = 0.0603);.;.;.;

MVP

0.78

ClinPred

0.48

GERP RS

4.9

Varity_R

0.29

gMVP

0.82

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

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over