8-115418391-C-T

Variant names:

• chr8-115418391-C-T
• rs121908435
• NM_014112.5:c.2762G>A

Variant summary

Our verdict is Pathogenic. Variant got 14 ACMG points: 14P and 0B. PM2 PP3_Strong PP5_Very_Strong

The NM_014112.5(TRPS1):​c.2762G>A​(p.Arg921Gln) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. 12/21 in silico tools predict a damaging outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: TRPS1 NM_014112.5 missense
• Clinical Significance: Pathogenic criteria provided, multiple submitters, no conflicts P:4 O:1
• Conservation: PhyloP100: 7.71

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.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.991
• PP5: Variant 8-115418391-C-T is Pathogenic according to our data. Variant chr8-115418391-C-T is described in ClinVar as [Pathogenic]. Clinvar id is 5577.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TRPS1	NM_014112.5	c.2762G>A	p.Arg921Gln	missense_variant	Exon 6 of 7	ENST00000395715.8	NP_054831.2
TRPS1	NM_001282903.3	c.2741G>A	p.Arg914Gln	missense_variant	Exon 6 of 7		NP_001269832.1
TRPS1	NM_001282902.3	c.2735G>A	p.Arg912Gln	missense_variant	Exon 5 of 6		NP_001269831.1
TRPS1	NM_001330599.2	c.2723G>A	p.Arg908Gln	missense_variant	Exon 5 of 6		NP_001317528.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TRPS1	ENST00000395715.8	c.2762G>A	p.Arg921Gln	missense_variant	Exon 6 of 7	1	NM_014112.5	ENSP00000379065.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

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:2

Apr 23, 2021

Revvity Omics, Revvity

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

May 02, 2023

GeneDx

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis supports that this missense variant does not alter protein structure/function; This variant is associated with the following publications: (PMID: 29436063, 32442662, 35863130, 27826100, 25792522, 33073934, 35450306, 29499646, 36866988, 11807863, 11112658) -

Trichorhinophalangeal syndrome, type III Pathogenic:1

Jan 01, 2002

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

- -

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

Nov 18, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces arginine, which is basic and polar, with glutamine, which is neutral and polar, at codon 921 of the TRPS1 protein (p.Arg921Gln). This variant is not present in population databases (gnomAD no frequency). This missense change has been observed in individual(s) with trichorhinophalangeal syndrome (PMID: 11112658, 11807863, 27826100; internal data). In at least one individual the variant was observed to be de novo. This variant is also known as p.Arg908Gln. ClinVar contains an entry for this variant (Variation ID: 5577). Invitae Evidence Modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) has been performed for this missense variant. However, the output from this modeling did not meet the statistical confidence thresholds required to predict the impact of this variant on TRPS1 protein function. For these reasons, this variant has been classified as Pathogenic. -

Trichorhinophalangeal dysplasia type I Other:1

-

GeneReviews

Significance: not provided

Review Status: no classification provided

Collection Method: literature only

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.57	D
BayesDel_noAF	Pathogenic	0.58
CADD	Pathogenic	33
DANN	Pathogenic	1.0
DEOGEN2	Uncertain	0.79	D;.;D;.;.
Eigen	Pathogenic	1.1
Eigen_PC	Pathogenic	1.0
FATHMM_MKL	Uncertain	0.93	D
LIST_S2	Pathogenic	1.0	D;D;.;D;D
M_CAP	Pathogenic	0.74	D
MetaRNN	Pathogenic	0.99	D;D;D;D;D
MetaSVM	Pathogenic	0.91	D
MutationAssessor	Pathogenic	4.6	H;.;H;.;.
PrimateAI	Pathogenic	0.90	D
PROVEAN	Uncertain	-2.5	.;N;N;N;N
REVEL	Pathogenic	0.93
Sift	Pathogenic	0.0	.;D;D;D;D
Sift4G	Pathogenic	0.0	.;D;D;D;D
Polyphen		1.0	D;D;D;.;D
Vest4		0.80, 0.84, 0.92, 0.87
MutPred		0.98		Loss of MoRF binding (P = 0.0152);.;Loss of MoRF binding (P = 0.0152);.;.;
MVP		0.94
MPC		1.7
ClinPred		1.0	D
GERP RS		5.8
Varity_R		0.86
gMVP		0.99

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: rs121908435; hg19: chr8-116430619; COSMIC: COSV105875821;