rs1554973844

Positions:

• chr11-65546547-C-A
• chr11-65546547-C-T

Variant summary

Our verdict is Pathogenic. Variant got 11 ACMG points: 11P and 0B. PVS1 PM2 PP5

The NM_001130144.3(LTBP3):​c.2248G>T​(p.Glu750Ter) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000069 in 1,449,948 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic,confers sensitivity (no stars). Variant results in nonsense mediated mRNA decay.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: LTBP3 NM_001130144.3 stop_gained
• Clinical Significance: Pathogenic; confers sensitivity no assertion criteria provided P:1 O:1
• Conservation: PhyloP100: 1.33

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]

ACMG classification

Verdict is Pathogenic. Variant got 11 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 11-65546547-C-A is Pathogenic according to our data. Variant chr11-65546547-C-A is described in ClinVar as [Pathogenic, confers_sensitivity]. Clinvar id is 523638.Status of the report is no_assertion_criteria_provided, 0 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
LTBP3	NM_001130144.3	c.2248G>T	p.Glu750Ter	stop_gained	16/28	ENST00000301873.11	NP_001123616.1
LTBP3	NM_021070.4	c.2248G>T	p.Glu750Ter	stop_gained	16/27		NP_066548.2
LTBP3	NM_001164266.1	c.1897G>T	p.Glu633Ter	stop_gained	16/27		NP_001157738.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
LTBP3	ENST00000301873.11	c.2248G>T	p.Glu750Ter	stop_gained	16/28	2	NM_001130144.3	ENSP00000301873	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.90e-7 AC: 1 AN: 1449948 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 721762

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: 9.00e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic; confers sensitivity

Submissions summary: Pathogenic:1 Other:1

Revision: no assertion criteria provided

Submissions by phenotype

Brachyolmia-amelogenesis imperfecta syndrome Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

May 11, 2018

- -

Heritable Thoracic Aortic Disease Other:1

confers sensitivity, no assertion criteria provided

research

University of Washington Center for Mendelian Genomics, University of Washington

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.63	D
BayesDel_noAF	Pathogenic	0.59
CADD	Pathogenic	40
DANN	Uncertain	0.99
Eigen	Pathogenic	0.76
Eigen_PC	Uncertain	0.54
FATHMM_MKL	Benign	0.67	D
MutationTaster	Benign	1.0	A;A;A;A;D
Vest4		0.78
ClinPred		0.99	D
GERP RS		5.0
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.26		Details are displayed if max score is > 0.2
DS_AL_spliceai		0.26		Position offset: 17

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs1554973844; hg19: chr11-65314018; COSMIC: COSV57244376; COSMIC: COSV57244376;