dbSNP rs121909208: TGFBI:p.Arg555Trp (chr5-136056780-C-T) – ACMG Classification: Pathogenic (22 pts)

Variant summary

Our verdict is Pathogenic. The variant received 22 ACMG points: 22P and 0B. PS3PM1PM2PM5PP3_StrongPP5_Very_Strong

The NM_000358.3(TGFBI):c.1663C>T(p.Arg555Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000186 in 1,613,608 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 (★★). ClinVar reports functional evidence for this variant: "SCV004036829: Published functional studies demonstrate that p.(R555W) leads to increased expression and aggregation of the TGFBI protein (Runager et al., 2011" and additional evidence is available in ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R555Q) has been classified as Pathogenic.

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

TGFBI
NM_000358.3 missense

Scores

Clinical Significance

Pathogenic criteria provided, multiple submitters, no conflicts P:8

Conservation

PhyloP100: 1.83

Publications

117 publications found

Variant links:

Genes affected

TGFBI (HGNC:11771): (transforming growth factor beta induced) This gene encodes an RGD-containing protein that binds to type I, II and IV collagens. The RGD motif is found in many extracellular matrix proteins modulating cell adhesion and serves as a ligand recognition sequence for several integrins. This protein plays a role in cell-collagen interactions and may be involved in endochondrial bone formation in cartilage. The protein is induced by transforming growth factor-beta and acts to inhibit cell adhesion. Mutations in this gene are associated with multiple types of corneal dystrophy. [provided by RefSeq, Jul 2008]

TGFBI Gene-Disease associations (from GenCC):

epithelial-stromal TGFBI dystrophy
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, PanelApp Australia
granular corneal dystrophy type I
Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae), G2P
granular corneal dystrophy type II
Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: Orphanet, G2P
lattice corneal dystrophy type I
Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: G2P, Orphanet
Reis-Bucklers corneal dystrophy
Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: G2P, Orphanet
Thiel-Behnke corneal dystrophy
Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: G2P, Orphanet
epithelial basement membrane dystrophy
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

TGFBI links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Pathogenic. The variant received 22 ACMG points.

PS3

PS3 evidence extracted from ClinVar submissions: SCV004036829: Published functional studies demonstrate that p.(R555W) leads to increased expression and aggregation of the TGFBI protein (Runager et al., 2011; Yam et al., 2012; Underhaug et al., 2013); SCV004292856: Experimental studies have shown that this missense change affects TGFBI function (PMID: 23559853).

PM1

In a domain FAS1 4 (size 130) in uniprot entity BGH3_HUMAN there are 13 pathogenic changes around while only 3 benign (81%) in NM_000358.3

PM2

Very rare variant in population databases, with high coverage;

PM5

Other missense variant is known to change same aminoacid residue: Variant chr5-136056781-G-A is described in ClinVar as Pathogenic. ClinVar VariationId is 7867.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.982

PP5

Variant 5-136056780-C-T is Pathogenic according to our data. Variant chr5-136056780-C-T is described in ClinVar as Pathogenic. ClinVar VariationId is 7866.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000358.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TGFBI	NM_000358.3	MANE Select	c.1663C>T	p.Arg555Trp	missense	Exon 12 of 17	NP_000349.1	Q15582

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
TGFBI	ENST00000442011.7	TSL:1 MANE Select	c.1663C>T	p.Arg555Trp	missense	Exon 12 of 17	ENSP00000416330.2	Q15582
TGFBI	ENST00000514554.5	TSL:5	c.814C>T	p.Arg272Trp	missense	Exon 6 of 9	ENSP00000421440.1	H0Y8L3
TGFBI	ENST00000506699.5	TSL:2	n.2180C>T		non_coding_transcript_exon	Exon 12 of 17

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152138

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:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1461470

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

727014

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33474

American (AMR)

AF:

0.00

AC:

AN:

44680

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26120

East Asian (EAS)

AF:

0.00

AC:

AN:

39694

South Asian (SAS)

AF:

0.0000116

AC:

AN:

86236

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53392

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

8.99e-7

AC:

AN:

1111734

Other (OTH)

AF:

0.00

AC:

AN:

60372

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.525

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

AF:

0.00000657

AC:

AN:

152138

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74316

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41416

American (AMR)

AF:

0.00

AC:

AN:

15272

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5190

South Asian (SAS)

AF:

0.000207

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10614

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68028

Other (OTH)

AF:

0.00

AC:

AN:

2090

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.575

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:

0.00

Hom.:

Bravo

AF:

0.00000756

ClinVar

ClinVar submissions

Significance:Pathogenic

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

not provided (3)

Groenouw corneal dystrophy type I (2)

Corneal dystrophy (1)

Lattice corneal dystrophy Type I (1)

Reis-Bucklers' corneal dystrophy;C0521723:Epithelial basement membrane dystrophy;C1275685:Avellino corneal dystrophy;C1562894:Thiel-Behnke corneal dystrophy;C1641846:Groenouw corneal dystrophy type I;C1690006:Lattice corneal dystrophy Type I;C1837974:Corneal dystrophy, lattice type 3A (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.13

BayesDel_addAF

Pathogenic

0.25

BayesDel_noAF

Uncertain

0.13

CADD

Uncertain

(source)

DANN

Pathogenic

1.0

DEOGEN2

Uncertain

0.52

Eigen

Benign

0.095

Eigen_PC

Benign

0.16

FATHMM_MKL

Uncertain

0.91

LIST_S2

Uncertain

0.86

M_CAP

Benign

0.084

MetaRNN

Pathogenic

0.98

MetaSVM

Benign

-0.68

MutationAssessor

Benign

1.8

PhyloP100

1.8

PrimateAI

Benign

0.37

PROVEAN

Benign

-1.2

REVEL

Uncertain

0.64

Sift

Uncertain

0.018

Sift4G

Benign

0.070

Polyphen

1.0

Vest4

0.77

MutPred

0.86

Loss of disorder (P = 0.004)

MVP

0.96

MPC

0.22

ClinPred

0.92

GERP RS

5.0

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.58

gMVP

0.83

Mutation Taster

=11/89

disease causing (ClinVar)

(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

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over