rs202245444

Positions:

• chr19-54191869-C-T

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_001077446.4(TSEN34):​c.392C>T​(p.Ser131Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000556 in 1,614,086 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency:
  • Genomes: 𝑓 0.00053 (0 hom., cov: 32)
  • Exomes 𝑓: 0.00056 (1 hom.)
• Consequence: TSEN34 NM_001077446.4 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:7
• Conservation: PhyloP100: 0.469

Genes affected

TSEN34 (HGNC:15506): (tRNA splicing endonuclease subunit 34) This gene encodes a catalytic subunit of the tRNA splicing endonuclease, which catalyzes the removal of introns from precursor tRNAs. The endonuclease complex is also associated with a pre-mRNA 3-prime end processing factor. A mutation in this gene results in the neurological disorder pontocerebellar hypoplasia type 2. Multiple alternatively spliced variants, encoding the same protein, have been identified.[provided by RefSeq, Oct 2009]

TSEN34 (HGNC:):

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.01004678).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TSEN34	NM_001077446.4	c.392C>T	p.Ser131Leu	missense_variant	2/4	ENST00000396388.3	NP_001070914.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
TSEN34	ENST00000396388.3	c.392C>T	p.Ser131Leu	missense_variant	2/4	1	NM_001077446.4	ENSP00000379671.2

Frequencies

GnomAD3 genomes AF: 0.000533 AC: 81 AN: 152090 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.000290

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000786

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: 0.000779

Gnomad OTH AF: 0.00143

GnomAD3 exomes AF: 0.000538 AC: 134 AN: 249300 Hom.: 0 AF XY: 0.000517 AC XY: 70 AN XY: 135342

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00116

Gnomad ASJ exome AF: 0.0000994

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.0000327

Gnomad FIN exome AF: 0.0000464

Gnomad NFE exome AF: 0.000743

Gnomad OTH exome AF: 0.00116

GnomAD4 exome AF: 0.000558 AC: 816 AN: 1461878 Hom.: 1 Cov.: 35 AF XY: 0.000560 AC XY: 407 AN XY: 727240

Gnomad4 AFR exome AF: 0.000119

Gnomad4 AMR exome AF: 0.00130

Gnomad4 ASJ exome AF: 0.0000383

Gnomad4 EAS exome AF: 0.0000252

Gnomad4 SAS exome AF: 0.0000348

Gnomad4 FIN exome AF: 0.0000562

Gnomad4 NFE exome AF: 0.000629

Gnomad4 OTH exome AF: 0.000646

GnomAD4 genome AF: 0.000532 AC: 81 AN: 152208 Hom.: 0 Cov.: 32 AF XY: 0.000470 AC XY: 35 AN XY: 74414

Gnomad4 AFR AF: 0.000289

Gnomad4 AMR AF: 0.000785

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000208

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000779

Gnomad4 OTH AF: 0.00142

Alfa AF: 0.000630 Hom.: 0

Bravo AF: 0.000657

ESP6500AA AF: 0.00 AC: 0

ESP6500EA AF: 0.000607 AC: 5

ExAC AF: 0.000438 AC: 53

EpiCase AF: 0.00120

EpiControl AF: 0.00130

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:7

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Uncertain:4

Uncertain significance, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Oct 13, 2023	This sequence change replaces serine, which is neutral and polar, with leucine, which is neutral and non-polar, at codon 131 of the TSEN34 protein (p.Ser131Leu). This variant is present in population databases (rs202245444, gnomAD 0.1%), and has an allele count higher than expected for a pathogenic variant. This variant has not been reported in the literature in individuals affected with TSEN34-related conditions. ClinVar contains an entry for this variant (Variation ID: 212447). Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Not Available"; PolyPhen-2: "Benign"; Align-GVGD: "Not Available". The leucine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -
Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	May 21, 2019	In silico analysis, which includes protein predictors and evolutionary conservation, supports that this variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -
Uncertain significance, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Mar 01, 2018	- -
Uncertain significance, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Genetic Services Laboratory, University of Chicago

Jan 15, 2015

- -

Pontoneocerebellar hypoplasia Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 12, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -

Pontocerebellar hypoplasia type 2C Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Fulgent Genetics, Fulgent Genetics

Oct 31, 2018

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.072
BayesDel_addAF	Benign	-0.44	T
BayesDel_noAF	Benign	-0.45
CADD	Benign	16
DANN	Benign	0.95
DEOGEN2	Benign	0.016	.;T;T;.;T;T
Eigen	Benign	-0.82
Eigen_PC	Benign	-0.86
FATHMM_MKL	Benign	0.13	N
M_CAP	Benign	0.019	T
MetaRNN	Benign	0.010	T;T;T;T;T;T
MetaSVM	Benign	-0.96	T
MutationAssessor	Benign	1.9	.;.;L;.;L;L
PrimateAI	Benign	0.33	T
PROVEAN	Benign	-0.76	N;N;N;N;N;N
REVEL	Benign	0.048
Sift	Benign	0.16	T;T;T;T;T;T
Sift4G	Benign	0.29	T;T;T;T;T;T
Polyphen		0.020	.;.;B;.;B;B
Vest4		0.19, 0.23, 0.19, 0.19
MVP		0.57
MPC		0.26
ClinPred		0.011	T
GERP RS		2.1
Varity_R		0.053
gMVP		0.34

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: rs202245444; hg19: chr19-54695720;