rs751565386

Positions:

• chr8-115418392-G-A
• chr8-115418392-G-T

Variant summary

Our verdict is Pathogenic. Variant got 14 ACMG points: 14P and 0B. PVS1_Strong PM2 PP5_Very_Strong

The NM_014112.5(TRPS1):​c.2761C>T​(p.Arg921Ter) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,870 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 (★★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: TRPS1 NM_014112.5 stop_gained
• Clinical Significance: Pathogenic criteria provided, multiple submitters, no conflicts P:4 O:1
• Conservation: PhyloP100: 3.38

Genes affected

TRPS1 (HGNC:12340): (transcriptional repressor GATA binding 1) This gene encodes a transcription factor that represses GATA-regulated genes and binds to a dynein light chain protein. Binding of the encoded protein to the dynein light chain protein affects binding to GATA consensus sequences and suppresses its transcriptional activity. Defects in this gene are a cause of tricho-rhino-phalangeal syndrome (TRPS) types I-III. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Pathogenic. Variant got 14 ACMG points.

• PVS1: Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant is located in the 3'-most 50 bp of the penultimate exon, not predicted to undergo nonsense mediated mRNA decay. Fraction of 0.289 CDS is truncated, and there are 1 pathogenic variants in the truncated region.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 8-115418392-G-A is Pathogenic according to our data. Variant chr8-115418392-G-A is described in ClinVar as [Pathogenic]. Clinvar id is 438463.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TRPS1	NM_014112.5	c.2761C>T	p.Arg921Ter	stop_gained	6/7	ENST00000395715.8	NP_054831.2
TRPS1	NM_001282903.3	c.2740C>T	p.Arg914Ter	stop_gained	6/7		NP_001269832.1
TRPS1	NM_001282902.3	c.2734C>T	p.Arg912Ter	stop_gained	5/6		NP_001269831.1
TRPS1	NM_001330599.2	c.2722C>T	p.Arg908Ter	stop_gained	5/6		NP_001317528.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
TRPS1	ENST00000395715.8	c.2761C>T	p.Arg921Ter	stop_gained	6/7	1	NM_014112.5	ENSP00000379065	A1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461870 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 727238

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: 8.99e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:4 Other:1

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Pathogenic:3

Pathogenic, criteria provided, single submitter	clinical testing	Clinical Genetics and Genomics, Karolinska University Hospital	Feb 12, 2016	- -
Pathogenic, criteria provided, single submitter	clinical testing	Institute of Medical Genetics and Applied Genomics, University Hospital Tübingen	Oct 23, 2020	- -
Pathogenic, criteria provided, single submitter	clinical testing	GeneDx	Jun 20, 2023	Reported in patients with trichorhinophalangeal syndrome in published literature (Maas et al., 2015); Nonsense variant predicted to result in protein truncation or nonsense mediated decay in a gene for which loss of function is a known mechanism of disease; Not observed at significant frequency in large population cohorts (gnomAD); This variant is associated with the following publications: (PMID: 27133561, 36291383, 25177352, 28170084, 25792522) -

Trichorhinophalangeal dysplasia type I;C1860823:Trichorhinophalangeal syndrome, type III Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Oct 13, 2023

This sequence change creates a premature translational stop signal (p.Arg921*) in the TRPS1 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in TRPS1 are known to be pathogenic (PMID: 11112658). This variant is not present in population databases (gnomAD no frequency). This premature translational stop signal has been observed in individuals with clinical features of trichorhinopharyngeal syndrome (PMID: 25792522, 28170084). ClinVar contains an entry for this variant (Variation ID: 438463). For these reasons, this variant has been classified as Pathogenic. -

Trichorhinophalangeal dysplasia type I Other:1

not provided, no classification provided

literature only

GeneReviews

-

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.63	D
BayesDel_noAF	Pathogenic	0.52
CADD	Pathogenic	39
DANN	Uncertain	1.0
Eigen	Pathogenic	0.76
Eigen_PC	Uncertain	0.64
FATHMM_MKL	Uncertain	0.80	D
MutationTaster	Benign	1.0	A;A;A;A
Vest4		0.95, 0.95, 0.91, 0.94
ClinPred		1.0	D
GERP RS		4.9

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

LitVar

Other links and lift over

dbSNP: rs751565386; hg19: chr8-116430620; COSMIC: COSV55227212;