22-50525780-G-A

Variant names:

• chr22-50525780-G-A
• rs863224256
• NM_001953.5:c.1439C>T

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001953.5(TYMP):​c.1439C>T​(p.Pro480Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000274 in 1,458,468 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P480A) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 35)
  • Exomes 𝑓: 0.0000027 (0 hom.)
• Consequence: TYMP NM_001953.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.391
• Publications: 0 publications found

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]

SCO2 Gene-Disease associations (from GenCC):

• cardioencephalomyopathy, fatal infantile, due to cytochrome c oxidase deficiency 1

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), PanelApp Australia, G2P
• Leigh syndrome

  Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
• myopia 6

  Inheritance: AD Classification: STRONG, NO_KNOWN Submitted by: G2P, PanelApp Australia
• autosomal recessive axonal charcot-marie-tooth disease due to copper metabolism defect

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.09599018).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001953.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TYMP	NM_001953.5	MANE Select	c.1439C>T	p.Pro480Leu	missense	Exon 10 of 10	NP_001944.1	E5KRG5
	TYMP	NM_001257989.1		c.1454C>T	p.Pro485Leu	missense	Exon 10 of 10	NP_001244918.1	P19971-2
	TYMP	NM_001113755.3		c.1439C>T	p.Pro480Leu	missense	Exon 10 of 10	NP_001107227.1	E5KRG5

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TYMP	ENST00000252029.8	TSL:1 MANE Select	c.1439C>T	p.Pro480Leu	missense	Exon 10 of 10	ENSP00000252029.3	P19971-1
	TYMP	ENST00000395681.6	TSL:1	c.1454C>T	p.Pro485Leu	missense	Exon 10 of 10	ENSP00000379038.1	P19971-2
	TYMP	ENST00000395678.7	TSL:1	c.1439C>T	p.Pro480Leu	missense	Exon 10 of 10	ENSP00000379036.3	P19971-1

Frequencies

GnomAD3 genomes Cov.: 35

GnomAD2 exomes AF: 0.00 AC: 0 AN: 232264 AF XY: 0.00

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 FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000274 AC: 4 AN: 1458468 Hom.: 0 Cov.: 38 AF XY: 0.00000413 AC XY: 3 AN XY: 725536

African (AFR) AF: 0.00 AC: 0 AN: 33402

American (AMR) AF: 0.00 AC: 0 AN: 44604

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26064

East Asian (EAS) AF: 0.00 AC: 0 AN: 39626

South Asian (SAS) AF: 0.00 AC: 0 AN: 86184

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 51706

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5732

European-Non Finnish (NFE) AF: 0.00000360 AC: 4 AN: 1110972

Other (OTH) AF: 0.00 AC: 0 AN: 60178

GnomAD4 genome Cov.: 35

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.097
BayesDel_addAF	Uncertain	0.054	T
BayesDel_noAF	Benign	-0.16
CADD	Benign	20
DANN	Benign	0.97
DEOGEN2	Benign	0.16	T
Eigen	Benign	-1.1
Eigen_PC	Benign	-1.2
FATHMM_MKL	Uncertain	0.87	D
LIST_S2	Benign	0.53	T
M_CAP	Uncertain	0.26	D
MetaRNN	Benign	0.096	T
MetaSVM	Uncertain	0.050	D
MutationAssessor	Benign	1.8	L
PhyloP100		-0.39
PrimateAI	Uncertain	0.65	T
PROVEAN	Benign	-0.56	N
REVEL	Benign	0.27
Sift	Uncertain	0.017	D
Sift4G	Uncertain	0.032	D
Polyphen		0.14	B
Vest4		0.18
MutPred		0.22		Gain of stability (P = 0.0045)
MVP		0.66
MPC		0.77
ClinPred		0.38	T
GERP RS		-1.8
PromoterAI		-0.060	Neutral
Varity_R		0.12
gMVP		0.35
Mutation Taster		=89/11	polymorphism

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

Other links and lift over

dbSNP: rs863224256; hg19: chr22-50964209;