Variant 22-50529755-C-A details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 8P and 10B. PVS1BP6_ModerateBS1BS2

The ENST00000395680.6(TYMP):c.-45-1G>T variant causes a splice acceptor change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000261 in 1,560,224 control chromosomes in the GnomAD database, including 3 homozygotes. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Likely benign (★).

Frequency

Genomes: 𝑓 0.0014 ( 1 hom., cov: 33)

Exomes 𝑓: 0.00013 ( 2 hom. )

Consequence

TYMP
ENST00000395680.6 splice_acceptor

Scores

Splicing: ADA: 0.00003153

Clinical Significance

Likely benign criteria provided, single submitter B:1

Conservation

PhyloP100: -0.806

Variant links:

Genes affected

TYMP (HGNC:3148): (thymidine phosphorylase) This gene encodes an angiogenic factor which promotes angiogenesis in vivo and stimulates the in vitro growth of a variety of endothelial cells. It has a highly restricted target cell specificity acting only on endothelial cells. Mutations in this gene have been associated with mitochondrial neurogastrointestinal encephalomyopathy. Multiple alternatively spliced transcript variants have been identified. [provided by RefSeq, Apr 2012]

TYMP links:

CIMAP1B (HGNC:34388): (ciliary microtubule associated protein 1B) Predicted to be active in cytoskeleton. [provided by Alliance of Genome Resources, Apr 2022]

CIMAP1B links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PVS1

Splicing +-2 bp (donor or acceptor) variant, LoF is a know mechanism of disease, Cryptic splice site detected, with MaxEntScore 5.6, offset of 35, new splice context is: cgtgtcaggcatccccgcAGgcc. Cryptic site results in frameshift change. If cryptic site found is not functional and variant results in exon loss, it results in frameshift change.

BP6

Variant 22-50529755-C-A is Benign according to our data. Variant chr22-50529755-C-A is described in ClinVar as [Likely_benign]. Clinvar id is 379866.Status of the report is criteria_provided_single_submitter, 1 stars.

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00142 (217/152314) while in subpopulation AFR AF= 0.00488 (203/41572). AF 95% confidence interval is 0.00433. There are 1 homozygotes in gnomad4. There are 103 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.

BS2

High Homozygotes in GnomAdExome4 at 2 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TYMP	NM_001953.5 linkuse as main transcript	c.-10-36G>T		intron_variant		ENST00000252029.8	NP_001944.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
TYMP	ENST00000252029.8 linkuse as main transcript	c.-10-36G>T		intron_variant		1	NM_001953.5	ENSP00000252029	P2	P19971-1

Frequencies

GnomAD3 genomes

AF:

0.00143

AC:

217

AN:

152196

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00490

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000523

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.00191

GnomAD3 exomes

AF:

0.000324

AC:

AN:

185318

Hom.:

AF XY:

0.000295

AC XY:

AN XY:

101686

show subpopulations

Gnomad AFR exome

AF:

0.00432

Gnomad AMR exome

AF:

0.000437

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000394

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000126

Gnomad OTH exome

AF:

0.000420

GnomAD4 exome

AF:

0.000135

AC:

190

AN:

1407910

Hom.:

Cov.:

AF XY:

0.000124

AC XY:

AN XY:

696096

show subpopulations

Gnomad4 AFR exome

AF:

0.00420

Gnomad4 AMR exome

AF:

0.000439

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000123

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000555

Gnomad4 OTH exome

AF:

0.000465

GnomAD4 genome

AF:

0.00142

AC:

217

AN:

152314

Hom.:

Cov.:

AF XY:

0.00138

AC XY:

103

AN XY:

74482

show subpopulations

Gnomad4 AFR

AF:

0.00488

Gnomad4 AMR

AF:

0.000523

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.00189

Alfa

AF:

0.0000428

Hom.:

Bravo

AF:

0.00170

Asia WGS

AF:

0.000577

AC:

AN:

3478

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

GeneDx

Jul 07, 2017

This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.75

CADD

Benign

2.8

DANN

Benign

0.64

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.000032

dbscSNV1_RF

Benign

0.0

SpliceAI score (max)

0.14

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over