chr18-657812-C-A

Position:

chr18-657812-C-A

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_001071.4(TYMS):c.70C>A(p.Pro24Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000103 in 1,463,022 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000046 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00011 ( 0 hom. )

Consequence

TYMS
NM_001071.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.428

Variant links:

Genes affected

TYMS (HGNC:12441): (thymidylate synthetase) Thymidylate synthase catalyzes the methylation of deoxyuridylate to deoxythymidylate using, 10-methylenetetrahydrofolate (methylene-THF) as a cofactor. This function maintains the dTMP (thymidine-5-prime monophosphate) pool critical for DNA replication and repair. The enzyme has been of interest as a target for cancer chemotherapeutic agents. It is considered to be the primary site of action for 5-fluorouracil, 5-fluoro-2-prime-deoxyuridine, and some folate analogs. Expression of this gene and that of a naturally occurring antisense transcript, mitochondrial enolase superfamily member 1 (GeneID:55556), vary inversely when cell-growth progresses from late-log to plateau phase. Polymorphisms in this gene may be associated with etiology of neoplasia, including breast cancer, and response to chemotherapy. [provided by RefSeq, Aug 2017]

TYMS links:

TYMSOS (HGNC:29553): (TYMS opposite strand RNA)

TYMSOS links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

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=0.03602892).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
TYMS	NM_001071.4 linkuse as main transcript	c.70C>A	p.Pro24Thr	missense_variant	1/7	ENST00000323274.15
TYMSOS	NR_171001.1 linkuse as main transcript	n.450+30G>T		intron_variant, non_coding_transcript_variant
TYMS	NM_001354867.2 linkuse as main transcript	c.70C>A	p.Pro24Thr	missense_variant	1/6
TYMS	NM_001354868.2 linkuse as main transcript	c.70C>A	p.Pro24Thr	missense_variant	1/5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TYMS	ENST00000323274.15 linkuse as main transcript	c.70C>A	p.Pro24Thr	missense_variant	1/7	1	NM_001071.4	P1	P04818-1
TYMSOS	ENST00000585033.1 linkuse as main transcript	n.428+30G>T		intron_variant, non_coding_transcript_variant		2

Frequencies

GnomAD3 genomes

AF:

0.0000460

AC:

AN:

152050

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000483

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000655

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:

0.0000588

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000998

AC:

AN:

60096

Hom.:

AF XY:

0.000117

AC XY:

AN XY:

34232

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000253

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000110

AC:

144

AN:

1310972

Hom.:

Cov.:

AF XY:

0.000115

AC XY:

AN XY:

643830

show subpopulations

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:

0.0000235

Gnomad4 NFE exome

AF:

0.000136

Gnomad4 OTH exome

AF:

0.0000185

GnomAD4 genome

AF:

0.0000460

AC:

AN:

152050

Hom.:

Cov.:

AF XY:

0.0000538

AC XY:

AN XY:

74286

show subpopulations

Gnomad4 AFR

AF:

0.0000483

Gnomad4 AMR

AF:

0.0000655

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000588

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000491

ExAC

AF:

0.0000178

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Aug 02, 2021

The c.70C>A (p.P24T) alteration is located in exon 1 (coding exon 1) of the TYMS gene. This alteration results from a C to A substitution at nucleotide position 70, causing the proline (P) at amino acid position 24 to be replaced by a threonine (T). 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

0.077

BayesDel_addAF

Benign

-0.28

BayesDel_noAF

Benign

-0.63

CADD

Benign

2.2

DANN

Benign

0.81

DEOGEN2

Benign

0.14

T;.;.

Eigen

Benign

-1.3

Eigen_PC

Benign

-1.4

FATHMM_MKL

Benign

0.21

LIST_S2

Benign

0.72

T;T;T

M_CAP

Benign

0.0091

MetaRNN

Benign

0.036

T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.60

N;N;N

MutationTaster

Benign

1.0

N;N;N;N;N

PrimateAI

Uncertain

0.75

PROVEAN

Benign

0.52

N;N;N

REVEL

Benign

0.023

Sift

Benign

0.27

T;T;T

Sift4G

Benign

0.16

T;T;T

Polyphen

0.018

B;.;.

Vest4

0.18

MVP

0.068

MPC

0.96

ClinPred

0.039

GERP RS

-5.2

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.2

Varity_R

0.083

gMVP

0.19

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

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