chr22-50526278-C-G

Position:

• chr22-50526278-C-G

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001953.5(TYMP):​c.1127G>C​(p.Arg376Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000718 in 1,392,852 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 34)
  • Exomes 𝑓: 7.2e-7 (0 hom.)
• Consequence: TYMP NM_001953.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -1.17

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]

SCO2 (HGNC:10604): (synthesis of cytochrome C oxidase 2) Cytochrome c oxidase (COX) catalyzes the transfer of electrons from cytochrome c to molecular oxygen, which helps to maintain the proton gradient across the inner mitochondrial membrane that is necessary for aerobic ATP production. Human COX is a multimeric protein complex that requires several assembly factors; this gene encodes one of the COX assembly factors. The encoded protein is a metallochaperone that is involved in the biogenesis of cytochrome c oxidase subunit II. Mutations in this gene are associated with fatal infantile encephalocardiomyopathy and myopia 6. [provided by RefSeq, Oct 2014]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.12140989).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TYMP	NM_001953.5	c.1127G>C	p.Arg376Pro	missense_variant	8/10	ENST00000252029.8	NP_001944.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
TYMP	ENST00000252029.8	c.1127G>C	p.Arg376Pro	missense_variant	8/10	1	NM_001953.5	ENSP00000252029	P2

Frequencies

GnomAD3 genomes Cov.: 34

GnomAD4 exome AF: 7.18e-7 AC: 1 AN: 1392852 Hom.: 0 Cov.: 33 AF XY: 0.00 AC XY: 0 AN XY: 689804

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: 9.19e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 34

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.11
BayesDel_addAF	Benign	-0.065	T
BayesDel_noAF	Benign	-0.33
CADD	Benign	4.7
DANN	Benign	0.78
DEOGEN2	Benign	0.19	T;.;T;T;T
Eigen	Benign	-1.9
Eigen_PC	Benign	-1.9
FATHMM_MKL	Benign	0.29	N
LIST_S2	Benign	0.31	.;T;.;T;T
M_CAP	Pathogenic	0.81	D
MetaRNN	Benign	0.12	T;T;T;T;T
MetaSVM	Uncertain	0.0084	D
MutationAssessor	Benign	0.72	N;N;N;N;.
MutationTaster	Benign	1.0	N;N;N;N;N
PrimateAI	Uncertain	0.74	T
PROVEAN	Benign	-0.87	N;N;N;N;N
REVEL	Benign	0.17
Sift	Benign	0.26	T;T;T;T;T
Sift4G	Benign	0.48	T;T;T;T;T
Polyphen		0.0010	B;.;B;B;.
Vest4		0.17
MutPred		0.25		Gain of glycosylation at R376 (P = 0.0375);Gain of glycosylation at R376 (P = 0.0375);Gain of glycosylation at R376 (P = 0.0375);Gain of glycosylation at R376 (P = 0.0375);.;
MVP		0.35
MPC		0.64
ClinPred		0.075	T
GERP RS		-6.6
Varity_R		0.67
gMVP		0.50

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: rs765007158; hg19: chr22-50964707;