dbSNP rs117800773: LTBP2:p.Val1506Leu (chr14-74503992-C-A) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_000428.3(LTBP2):c.4516G>T(p.Val1506Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,812 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. V1506M) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

LTBP2
NM_000428.3 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 1.52

Publications

0 publications found

Variant links:

Genes affected

LTBP2 (HGNC:6715): (latent transforming growth factor beta binding protein 2) The protein encoded by this gene belongs to the family of latent transforming growth factor (TGF)-beta binding proteins (LTBP), which are extracellular matrix proteins with multi-domain structure. This protein is the largest member of the LTBP family possessing unique regions and with most similarity to the fibrillins. It has thus been suggested that it may have multiple functions: as a member of the TGF-beta latent complex, as a structural component of microfibrils, and a role in cell adhesion. [provided by RefSeq, Jul 2008]

LTBP2 Gene-Disease associations (from GenCC):

glaucoma 3, primary congenital, D
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), ClinGen
microspherophakia and/or megalocornea, with ectopia lentis and with or without secondary glaucoma
Inheritance: AR Classification: DEFINITIVE, STRONG, MODERATE Submitted by: Ambry Genetics, G2P, Labcorp Genetics (formerly Invitae)
Weill-Marchesani syndrome 3
Inheritance: AR, Unknown Classification: MODERATE, LIMITED Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae)
congenital glaucoma
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
Weill-Marchesani syndrome
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
glaucoma secondary to spherophakia/ectopia lentis and megalocornea
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

LTBP2 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.25824893).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
LTBP2	NM_000428.3 link	c.4516G>T	p.Val1506Leu	missense_variant	Exon 31 of 36	ENST00000261978.9	NP_000419.1	Q14767

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
LTBP2	ENST00000261978.9 link	c.4516G>T	p.Val1506Leu	missense_variant	Exon 31 of 36	1	NM_000428.3	ENSP00000261978.4	Q14767
LTBP2	ENST00000556690.5 link	c.4384G>T	p.Val1462Leu	missense_variant	Exon 30 of 35	5		ENSP00000451477.1	G3V3X5
LTBP2	ENST00000553939.5 link	n.4516G>T		non_coding_transcript_exon_variant	Exon 31 of 36	5		ENSP00000452110.1	G3V511

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461812

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

727206

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33480

American (AMR)

AF:

0.00

AC:

AN:

44718

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39698

South Asian (SAS)

AF:

0.00

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53360

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

8.99e-7

AC:

AN:

1111998

Other (OTH)

AF:

0.00

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome 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

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.25

BayesDel_addAF

Uncertain

0.013

BayesDel_noAF

Benign

-0.22

CADD

Benign

(source)

DANN

Uncertain

0.99

DEOGEN2

Benign

0.34

T;.

Eigen

Benign

-0.39

Eigen_PC

Benign

-0.26

FATHMM_MKL

Benign

0.42

LIST_S2

Benign

0.68

T;T

M_CAP

Benign

0.064

MetaRNN

Benign

0.26

T;T

MetaSVM

Uncertain

-0.022

MutationAssessor

Benign

0.88

L;.

PhyloP100

1.5

PrimateAI

Benign

0.43

PROVEAN

Benign

-0.95

N;N

REVEL

Uncertain

0.29

Sift

Benign

0.27

T;T

Sift4G

Benign

0.66

T;T

Polyphen

0.24

B;.

Vest4

0.41

MutPred

0.51

Gain of catalytic residue at L1503 (P = 9e-04);.;

MVP

0.67

MPC

0.21

ClinPred

0.75

GERP RS

5.0

Varity_R

0.087

gMVP

0.77

Mutation Taster

=82/18

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

ClinVar

Computational scores

Splicing

Publications

Other links and lift over