rs752375653

Variant names:

• chr11-65546811-GCC-G
• rs752375653
• NM_001130144.3:c.2215_2216delGG

Your query was ambiguous. Multiple possible variants found:

• chr11-65546811-GCC-G
• chr11-65546811-GCC-GC
• chr11-65546811-GCC-GCCC

Variant summary

Our verdict is Pathogenic. The variant received 10 ACMG points: 10P and 0B. PVS1 PM2

The NM_001130144.3(LTBP3):​c.2215_2216delGG​(p.Gly739ArgfsTer51) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000719 in 1,391,356 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Variant results in nonsense mediated mRNA decay.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 7.2e-7 (0 hom.)
• Consequence: LTBP3 NM_001130144.3 frameshift
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.99
• Publications: 0 publications found

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

ACMG classification

Our verdict: Pathogenic. The variant received 10 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

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
LTBP3	NM_001130144.3	c.2215_2216delGG	p.Gly739ArgfsTer51	frameshift_variant	Exon 15 of 28	ENST00000301873.11	NP_001123616.1
LTBP3	NM_021070.4	c.2215_2216delGG	p.Gly739ArgfsTer51	frameshift_variant	Exon 15 of 27		NP_066548.2
LTBP3	NM_001164266.1	c.1864_1865delGG	p.Gly622ArgfsTer51	frameshift_variant	Exon 15 of 27		NP_001157738.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
LTBP3	ENST00000301873.11	c.2215_2216delGG	p.Gly739ArgfsTer51	frameshift_variant	Exon 15 of 28	2	NM_001130144.3	ENSP00000301873.5

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 7.19e-7 AC: 1 AN: 1391356 Hom.: 0 AF XY: 0.00000145 AC XY: 1 AN XY: 691912

African (AFR) AF: 0.00 AC: 0 AN: 31608

American (AMR) AF: 0.00 AC: 0 AN: 42722

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 23792

East Asian (EAS) AF: 0.00 AC: 0 AN: 35036

South Asian (SAS) AF: 0.00 AC: 0 AN: 85736

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 38652

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5362

European-Non Finnish (NFE) AF: 9.32e-7 AC: 1 AN: 1072458

Other (OTH) AF: 0.00 AC: 0 AN: 55990

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
PhyloP100		2.0

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

Other links and lift over

dbSNP: rs752375653; hg19: chr11-65314282;