chr22-50526338-A-G

Variant names:

• chr22-50526338-A-G
• rs1060499532
• NM_001953.5:c.1067T>C

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2 PP3 PP5

The NM_001953.5(TYMP):​c.1067T>C​(p.Leu356Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (no stars). Synonymous variant affecting the same amino acid position (i.e. L356L) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 34)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: TYMP NM_001953.5 missense
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 0.640
• 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 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.776
• PP5: Variant 22-50526338-A-G is Pathogenic according to our data. Variant chr22-50526338-A-G is described in ClinVar as Pathogenic. ClinVar VariationId is 223051.Status of the report is no_assertion_criteria_provided, 0 stars.

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.1067T>C	p.Leu356Pro	missense	Exon 8 of 10	NP_001944.1	E5KRG5
	TYMP	NM_001257989.1		c.1067T>C	p.Leu356Pro	missense	Exon 8 of 10	NP_001244918.1	P19971-2
	TYMP	NM_001113755.3		c.1067T>C	p.Leu356Pro	missense	Exon 8 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.1067T>C	p.Leu356Pro	missense	Exon 8 of 10	ENSP00000252029.3	P19971-1
	TYMP	ENST00000395681.6	TSL:1	c.1067T>C	p.Leu356Pro	missense	Exon 8 of 10	ENSP00000379038.1	P19971-2
	TYMP	ENST00000395678.7	TSL:1	c.1067T>C	p.Leu356Pro	missense	Exon 8 of 10	ENSP00000379036.3	P19971-1

Frequencies

GnomAD3 genomes Cov.: 34

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1408438 Hom.: 0 Cov.: 33 AF XY: 0.00 AC XY: 0 AN XY: 699112

African (AFR) AF: 0.00 AC: 0 AN: 29806

American (AMR) AF: 0.00 AC: 0 AN: 40748

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25058

East Asian (EAS) AF: 0.00 AC: 0 AN: 35958

South Asian (SAS) AF: 0.00 AC: 0 AN: 81366

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 35596

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4932

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1096364

Other (OTH) AF: 0.00 AC: 0 AN: 58610

GnomAD4 genome Cov.: 34

ClinVar

ClinVar submissions

Significance: Pathogenic

Revision: no assertion criteria provided

Pathogenic	VUS	Benign	Condition
1	-	-	Mitochondrial DNA depletion syndrome 1 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.22
BayesDel_addAF	Pathogenic	0.43	D
BayesDel_noAF	Pathogenic	0.38
CADD	Benign	21
DANN	Uncertain	1.0
DEOGEN2	Benign	0.25	T
Eigen	Benign	0.11
Eigen_PC	Benign	0.0077
FATHMM_MKL	Uncertain	0.86	D
LIST_S2	Benign	0.59	T
M_CAP	Pathogenic	0.77	D
MetaRNN	Pathogenic	0.78	D
MetaSVM	Pathogenic	0.97	D
MutationAssessor	Uncertain	2.2	M
PhyloP100		0.64
PrimateAI	Pathogenic	0.88	D
PROVEAN	Benign	-1.4	N
REVEL	Pathogenic	0.69
Sift	Benign	0.075	T
Sift4G	Benign	0.10	T
Polyphen		1.0	D
Vest4		0.75
MutPred		0.54		Gain of helix (P = 0.0225)
MVP		0.85
MPC		1.4
ClinPred		0.76	D
GERP RS		3.5
PromoterAI		-0.032	Neutral
Varity_R		0.88
gMVP		0.72
Mutation Taster		=1/99	disease causing (ClinVar)

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: rs1060499532; hg19: chr22-50964767;