11-65557854-CCAGCAGCAGCAGCAGCAGCAG-CCAGCAGCAGCAGCAGCAG

Variant names:

Variant summary

Our verdict is Benign. The variant received -13 ACMG points: 0P and 13B. BP3BP6_Very_StrongBS1

The NM_001130144.3(LTBP3):c.103_105delCTG(p.Leu35del) variant causes a conservative inframe deletion change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.016 in 1,220,450 control chromosomes in the GnomAD database, including 1 homozygotes. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0023 ( 0 hom., cov: 27)

Exomes 𝑓: 0.018 ( 1 hom. )

Consequence

LTBP3
NM_001130144.3 conservative_inframe_deletion

Scores

Not classified

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:4O:1

Conservation

PhyloP100: 0.403

Publications

4 publications found

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 Gene-Disease associations (from GenCC):

brachyolmia-amelogenesis imperfecta syndrome
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE, LIMITED Submitted by: Orphanet, Labcorp Genetics (formerly Invitae), G2P, Ambry Genetics
geleophysic dysplasia 3
Inheritance: AD Classification: STRONG, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics
Acromicric dysplasia
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
geleophysic dysplasia
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

LTBP3 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -13 ACMG points.

BP3

Nonframeshift variant in repetitive region in NM_001130144.3

BP6

Variant 11-65557854-CCAG-C is Benign according to our data. Variant chr11-65557854-CCAG-C is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 532697.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00229 (341/149142) while in subpopulation AFR AF = 0.00341 (140/41020). AF 95% confidence interval is 0.00295. There are 0 homozygotes in GnomAd4. There are 176 alleles in the male GnomAd4 subpopulation. Median coverage is 27. This position passed quality control check.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
LTBP3	NM_001130144.3 link	c.103_105delCTG	p.Leu35del	conservative_inframe_deletion	Exon 1 of 28	ENST00000301873.11	NP_001123616.1	Q9NS15-1Q8WYU6
LTBP3	NM_021070.4 link	c.103_105delCTG	p.Leu35del	conservative_inframe_deletion	Exon 1 of 27		NP_066548.2	Q9NS15-2Q8WYU6
LTBP3	NM_001164266.1 link	c.-245_-243delCTG		5_prime_UTR_variant	Exon 1 of 27		NP_001157738.1	Q9NS15B9EG76Q8WYU6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
LTBP3	ENST00000301873.11 link	c.103_105delCTG	p.Leu35del	conservative_inframe_deletion	Exon 1 of 28	2	NM_001130144.3	ENSP00000301873.5		Q9NS15-1

Frequencies

GnomAD3 genomes

AF:

0.00227

AC:

339

AN:

149054

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00337

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000799

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000390

Gnomad SAS

AF:

0.000209

Gnomad FIN

AF:

0.00156

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00254

Gnomad OTH

AF:

0.000492

GnomAD2 exomes

AF:

0.0652

AC:

2153

AN:

33030

AF XY:

0.0647

show subpopulations

Gnomad AFR exome

AF:

0.0830

Gnomad AMR exome

AF:

0.0701

Gnomad ASJ exome

AF:

0.0767

Gnomad EAS exome

AF:

0.0818

Gnomad FIN exome

AF:

0.0612

Gnomad NFE exome

AF:

0.0550

Gnomad OTH exome

AF:

0.0537

GnomAD4 exome

AF:

0.0180

AC:

19231

AN:

1071308

Hom.:

AF XY:

0.0184

AC XY:

9602

AN XY:

522796

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.0219

AC:

475

AN:

21720

American (AMR)

AF:

0.0383

AC:

644

AN:

16806

Ashkenazi Jewish (ASJ)

AF:

0.0238

AC:

378

AN:

15862

East Asian (EAS)

AF:

0.0202

AC:

458

AN:

22686

South Asian (SAS)

AF:

0.0332

AC:

1452

AN:

43700

European-Finnish (FIN)

AF:

0.0213

AC:

499

AN:

23470

Middle Eastern (MID)

AF:

0.0166

AC:

AN:

3554

European-Non Finnish (NFE)

AF:

0.0164

AC:

14475

AN:

880950

Other (OTH)

AF:

0.0186

AC:

791

AN:

42560

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.276

Heterozygous variant carriers

2492

4983

7475

9966

12458

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

552

1104

1656

2208

2760

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00229

AC:

341

AN:

149142

Hom.:

Cov.:

AF XY:

0.00242

AC XY:

176

AN XY:

72768

show subpopulations

African (AFR)

AF:

0.00341

AC:

140

AN:

41020

American (AMR)

AF:

0.000798

AC:

AN:

15036

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3424

East Asian (EAS)

AF:

0.000392

AC:

AN:

5108

South Asian (SAS)

AF:

0.000209

AC:

AN:

4780

European-Finnish (FIN)

AF:

0.00156

AC:

AN:

9644

Middle Eastern (MID)

AF:

0.00

AC:

AN:

286

European-Non Finnish (NFE)

AF:

0.00254

AC:

170

AN:

66882

Other (OTH)

AF:

0.000487

AC:

AN:

2054

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.485

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00137

Hom.:

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:4Other:1

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:3

Jun 09, 2021

GeneDx

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Genome Diagnostics Laboratory, University Medical Center Utrecht

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Laboratory of Diagnostic Genome Analysis, Leiden University Medical Center (LUMC)

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Brachyolmia-amelogenesis imperfecta syndrome

Benign:1

Feb 03, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Brachyolmia-amelogenesis imperfecta syndrome;C4540511:Geleophysic dysplasia 3

Other:1

GenomeConnect, ClinGen

Significance:not provided

Review Status:no classification provided

Collection Method:phenotyping only

Variant interpreted as Uncertain significance and reported on 02-29-2020 by Lab or GTR ID 500031. GenomeConnect assertions are reported exactly as they appear on the patient-provided report from the testing laboratory. GenomeConnect staff make no attempt to reinterpret the clinical significance of the variant. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

PhyloP100

0.40

Mutation Taster

=77/23

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over