rs59741465

Variant names:

• chr12-121854772-G-A
• rs59741465
• NM_002150.3:c.345C>T

Variant summary

Our verdict is Benign. The variant received -21 ACMG points: 0P and 21B. BP4_Strong BP6_Very_Strong BP7 BS1 BS2

The NM_002150.3(HPD):​c.345C>T​(p.Ala115Ala) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00111 in 1,614,044 control chromosomes in the GnomAD database, including 31 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

• Frequency:
  • Genomes: 𝑓 0.0062 (18 hom., cov: 32)
  • Exomes 𝑓: 0.00058 (13 hom.)
• Consequence: HPD NM_002150.3 synonymous
• Clinical Significance: Benign criteria provided, multiple submitters, no conflicts B:5
• Conservation: PhyloP100: -0.0140
• Publications: 1 publications found

Genes affected

HPD (HGNC:5147): (4-hydroxyphenylpyruvate dioxygenase) The protein encoded by this gene is an enzyme in the catabolic pathway of tyrosine. The encoded protein catalyzes the conversion of 4-hydroxyphenylpyruvate to homogentisate. Defects in this gene are a cause of tyrosinemia type 3 (TYRO3) and hawkinsinuria (HAWK). Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jan 2010]

HPD Gene-Disease associations (from GenCC):

• tyrosinemia type III

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: G2P, ClinGen, Labcorp Genetics (formerly Invitae), Orphanet
• hawkinsinuria

  Inheritance: Unknown, AD Classification: STRONG, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), ClinGen, G2P

ACMG classification

Our verdict: Benign. The variant received -21 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.68).
• BP6: Variant 12-121854772-G-A is Benign according to our data. Variant chr12-121854772-G-A is described in ClinVar as Benign. ClinVar VariationId is 529470.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BP7: Synonymous conserved (PhyloP=-0.014 with no splicing effect.
• BS1: Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00617 (940/152262) while in subpopulation AFR AF = 0.0218 (907/41536). AF 95% confidence interval is 0.0207. There are 18 homozygotes in GnomAd4. There are 421 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.
• BS2: High Homozygotes in GnomAd4 at 18 AR,Unknown,AD gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_002150.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	HPD	NM_002150.3	MANE Select	c.345C>T	p.Ala115Ala	synonymous	Exon 7 of 14	NP_002141.2
	HPD	NM_001171993.2		c.228C>T	p.Ala76Ala	synonymous	Exon 9 of 16	NP_001165464.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	HPD	ENST00000289004.8	TSL:1 MANE Select	c.345C>T	p.Ala115Ala	synonymous	Exon 7 of 14	ENSP00000289004.4
	HPD	ENST00000543163.5	TSL:5	c.228C>T	p.Ala76Ala	synonymous	Exon 8 of 15	ENSP00000441677.1
	HPD	ENST00000542159.2	TSL:5	n.381C>T		non_coding_transcript_exon	Exon 4 of 6

Frequencies

GnomAD3 genomes AF: 0.00618 AC: 940 AN: 152144 Hom.: 18 Cov.: 32

Gnomad AFR AF: 0.0219

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00151

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: 0.0000294

Gnomad OTH AF: 0.00383

GnomAD2 exomes AF: 0.00169 AC: 425 AN: 251494 AF XY: 0.00121

Gnomad AFR exome AF: 0.0236

Gnomad AMR exome AF: 0.000867

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000264

Gnomad OTH exome AF: 0.000977

GnomAD4 exome AF: 0.000582 AC: 851 AN: 1461782 Hom.: 13 Cov.: 31 AF XY: 0.000514 AC XY: 374 AN XY: 727210

African (AFR) AF: 0.0215 AC: 719 AN: 33468

American (AMR) AF: 0.000984 AC: 44 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39694

South Asian (SAS) AF: 0.0000464 AC: 4 AN: 86256

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53414

Middle Eastern (MID) AF: 0.00104 AC: 6 AN: 5768

European-Non Finnish (NFE) AF: 0.0000126 AC: 14 AN: 1111930

Other (OTH) AF: 0.00106 AC: 64 AN: 60392

GnomAD4 genome AF: 0.00617 AC: 940 AN: 152262 Hom.: 18 Cov.: 32 AF XY: 0.00565 AC XY: 421 AN XY: 74452

African (AFR) AF: 0.0218 AC: 907 AN: 41536

American (AMR) AF: 0.00151 AC: 23 AN: 15280

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3470

East Asian (EAS) AF: 0.00 AC: 0 AN: 5188

South Asian (SAS) AF: 0.00 AC: 0 AN: 4822

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10622

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.0000294 AC: 2 AN: 68030

Other (OTH) AF: 0.00379 AC: 8 AN: 2110

Alfa AF: 0.00333 Hom.: 2

Bravo AF: 0.00772

Asia WGS AF: 0.00144 AC: 5 AN: 3478

EpiCase AF: 0.00

EpiControl AF: 0.0000593

ClinVar

ClinVar submissions as Germline

Significance: Benign

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	-	2	not provided (2)
-	-	1	Hawkinsinuria (1)
-	-	1	Tyrosinemia type III (1)
-	-	1	Tyrosinemia type III;C2931042:Hawkinsinuria (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.68
CADD	Benign	9.4
DANN	Benign	0.82
PhyloP100		-0.014
Mutation Taster		=99/1	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: rs59741465; hg19: chr12-122292678;