NM_000485.3:c.519C>G

Variant names:

• chr16-88809722-G-C
• rs140070863
• NM_000485.3:c.519C>G

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 5P and 4B. PM1 PM2 PP2 BP4_Strong

The NM_000485.3(APRT):​c.519C>G​(p.Phe173Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000197 in 152,236 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. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: 𝑓 0.000020 (0 hom., cov: 34)
• Consequence: APRT NM_000485.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.76
• Publications: 1 publications found

Genes affected

APRT (HGNC:626): (adenine phosphoribosyltransferase) Adenine phosphoribosyltransferase belongs to the purine/pyrimidine phosphoribosyltransferase family. A conserved feature of this gene is the distribution of CpG dinucleotides. This enzyme catalyzes the formation of AMP and inorganic pyrophosphate from adenine and 5-phosphoribosyl-1-pyrophosphate (PRPP). It also produces adenine as a by-product of the polyamine biosynthesis pathway. A homozygous deficiency in this enzyme causes 2,8-dihydroxyadenine urolithiasis. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

APRT Gene-Disease associations (from GenCC):

• adenine phosphoribosyltransferase deficiency

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

• PM1: In a hotspot region, there are 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 3 uncertain in NM_000485.3
• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 23 curated pathogenic missense variants (we use a threshold of 10). The gene has 7 curated benign missense variants. Gene score misZ: -0.23784 (below the threshold of 3.09). Trascript score misZ: -1.8306 (below the threshold of 3.09). GenCC associations: The gene is linked to adenine phosphoribosyltransferase deficiency.
• BP4: Computational evidence support a benign effect (MetaRNN=0.06551838).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000485.3. 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
	APRT	NM_000485.3	MANE Select	c.519C>G	p.Phe173Leu	missense	Exon 5 of 5	NP_000476.1	P07741-1
	APRT	NM_001030018.2		c.401-16C>G		intron	N/A	NP_001025189.1	P07741-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	APRT	ENST00000378364.8	TSL:1 MANE Select	c.519C>G	p.Phe173Leu	missense	Exon 5 of 5	ENSP00000367615.3	P07741-1
	APRT	ENST00000912471.1		c.765C>G	p.Phe255Leu	missense	Exon 5 of 5	ENSP00000582530.1
	APRT	ENST00000880214.1		c.612C>G	p.Phe204Leu	missense	Exon 5 of 5	ENSP00000550273.1

Frequencies

GnomAD3 genomes AF: 0.0000197 AC: 3 AN: 152236 Hom.: 0 Cov.: 34

Gnomad AFR AF: 0.0000724

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

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: 0.00

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.00000399 AC: 1 AN: 250744 AF XY: 0.00

Gnomad AFR exome AF: 0.0000618

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 Cov.: 31

GnomAD4 genome AF: 0.0000197 AC: 3 AN: 152236 Hom.: 0 Cov.: 34 AF XY: 0.0000269 AC XY: 2 AN XY: 74366

African (AFR) AF: 0.0000724 AC: 3 AN: 41452

American (AMR) AF: 0.00 AC: 0 AN: 15290

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5202

South Asian (SAS) AF: 0.00 AC: 0 AN: 4836

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10624

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 68040

Other (OTH) AF: 0.00 AC: 0 AN: 2092

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.0000189

ESP6500AA AF: 0.000227 AC: 1

ESP6500EA AF: 0.00 AC: 0

ExAC AF: 0.00000824 AC: 1

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	Adenine phosphoribosyltransferase deficiency (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.87
BayesDel_addAF	Benign	-0.095	T
BayesDel_noAF	Benign	-0.19
CADD	Benign	16
DANN	Benign	0.67
DEOGEN2	Benign	0.069	T
Eigen	Benign	-0.56
Eigen_PC	Benign	-0.42
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Benign	0.84	T
M_CAP	Uncertain	0.18	D
MetaRNN	Benign	0.066	T
MetaSVM	Uncertain	-0.23	T
MutationAssessor	Benign	-0.76	N
PhyloP100		1.8
PrimateAI	Uncertain	0.55	T
PROVEAN	Benign	-0.12	N
REVEL	Benign	0.21
Sift	Benign	1.0	T
Sift4G	Benign	0.66	T
Polyphen		0.0020	B
Vest4		0.081
MutPred		0.38		Gain of disorder (P = 0.1446)
MVP		0.89
MPC		0.16
ClinPred		0.024	T
GERP RS		1.9
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		2.8
Varity_R		0.26
gMVP		0.49

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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: rs140070863; hg19: chr16-88876130;