Genetic Variant TBX15:p.Pro559Leu (chr1-118884865-G-A) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_001330677.2(TBX15):c.1676C>T(p.Pro559Leu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000013 in 1,461,858 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★). Synonymous variant affecting the same amino acid position (i.e. P559P) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.000013 ( 0 hom. )

Consequence

TBX15
NM_001330677.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 9.46

Publications

0 publications found

Variant links:

Genes affected

TBX15 (HGNC:11594): (T-box transcription factor 15) This gene belongs to the T-box family of genes, which encode a phylogenetically conserved family of transcription factors that regulate a variety of developmental processes. All these genes contain a common T-box DNA-binding domain. Mutations in this gene are associated with Cousin syndrome.[provided by RefSeq, Oct 2009]

TBX15 Gene-Disease associations (from GenCC):

pelviscapular dysplasia
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: G2P, Labcorp Genetics (formerly Invitae), Orphanet

TBX15 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TBX15	NM_001330677.2 link	c.1676C>T	p.Pro559Leu	missense_variant	Exon 8 of 8	ENST00000369429.5	NP_001317606.1	Q96SF7-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
TBX15	ENST00000369429.5 link	c.1676C>T	p.Pro559Leu	missense_variant	Exon 8 of 8	5	NM_001330677.2	ENSP00000358437.3	Q96SF7-1
TBX15	ENST00000207157.7 link	c.1358C>T	p.Pro453Leu	missense_variant	Exon 8 of 8	1		ENSP00000207157.3	Q96SF7-2
TBX15	ENST00000449873.5 link	c.860C>T	p.Pro287Leu	missense_variant	Exon 4 of 4	5		ENSP00000398625.1	Q5JT55

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.0000130

AC:

AN:

1461858

Hom.:

Cov.:

AF XY:

0.0000110

AC XY:

AN XY:

727228

show subpopulations

African (AFR)

AF:

0.0000299

AC:

AN:

33480

American (AMR)

AF:

0.00

AC:

AN:

44722

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39690

South Asian (SAS)

AF:

0.00

AC:

AN:

86254

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53418

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

0.0000162

AC:

AN:

1111998

Other (OTH)

AF:

0.00

AC:

AN:

60394

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.467

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00000378

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Apr 29, 2025

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.1358C>T (p.P453L) alteration is located in exon 8 (coding exon 7) of the TBX15 gene. This alteration results from a C to T substitution at nucleotide position 1358, causing the proline (P) at amino acid position 453 to be replaced by a leucine (L). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.22

BayesDel_addAF

Uncertain

0.083

BayesDel_noAF

Benign

-0.12

CADD

Uncertain

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.067

.;T;T

Eigen

Uncertain

0.58

Eigen_PC

Uncertain

0.65

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.95

D;D;D

M_CAP

Benign

0.083

MetaRNN

Uncertain

0.48

T;T;T

MetaSVM

Uncertain

0.33

MutationAssessor

Benign

1.4

.;.;L

PhyloP100

9.5

PrimateAI

Uncertain

0.57

PROVEAN

Benign

-2.3

N;D;D

REVEL

Uncertain

0.44

Sift

Uncertain

0.0010

D;D;D

Sift4G

Uncertain

0.010

D;T;D

Polyphen

0.95

.;.;P

Vest4

0.21

MutPred

0.20

.;.;Loss of glycosylation at S560 (P = 0.0612);

MVP

0.39

MPC

0.32

ClinPred

0.95

GERP RS

5.3

Varity_R

0.23

gMVP

0.36

Mutation Taster

=87/13

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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chr1-118884865-G-A

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over