Genetic Variant ASCL1:c.-197T>A (chr12-102958048-T-A) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_004316.4(ASCL1):c.-197T>A variant causes a 5 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000132 in 151,870 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0 ( 0 hom. )

Failed GnomAD Quality Control

Consequence

ASCL1
NM_004316.4 5_prime_UTR

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 0.365

Publications

22 publications found

Variant links:

Genes affected

ASCL1 (HGNC:738): (achaete-scute family bHLH transcription factor 1) This gene encodes a member of the basic helix-loop-helix (BHLH) family of transcription factors. The protein activates transcription by binding to the E box (5'-CANNTG-3'). Dimerization with other BHLH proteins is required for efficient DNA binding. This protein plays a role in the neuronal commitment and differentiation and in the generation of olfactory and autonomic neurons. Mutations in this gene may contribute to the congenital central hypoventilation syndrome (CCHS) phenotype in rare cases. [provided by RefSeq, Jul 2008]

ASCL1 links:

PAH (HGNC:8582): (phenylalanine hydroxylase) This gene encodes a member of the biopterin-dependent aromatic amino acid hydroxylase protein family. The encoded phenylalanine hydroxylase enzyme hydroxylates phenylalanine to tyrosine and is the rate-limiting step in phenylalanine catabolism. Deficiency of this enzyme activity results in the autosomal recessive disorder phenylketonuria. [provided by RefSeq, Aug 2017]

PAH Gene-Disease associations (from GenCC):

phenylketonuria
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P, ClinGen, Myriad Women’s Health
classic phenylketonuria
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
maternal phenylketonuria
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
mild hyperphenylalaninemia
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
mild phenylketonuria
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
tetrahydrobiopterin-responsive hyperphenylalaninemia/phenylketonuria
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

PAH links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.78).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ASCL1	NM_004316.4 link	c.-197T>A		5_prime_UTR_variant	Exon 1 of 2	ENST00000266744.4	NP_004307.2	P50553
PAH	NM_001354304.2 link	c.-96+147A>T		intron_variant	Intron 1 of 13		NP_001341233.1

Ensembl

Gene	Transcript	HGVSc	Effect	Exon rank	TSL	MANE	Protein	UniProt
ASCL1	ENST00000266744.4 link	c.-197T>A	5_prime_UTR_variant	Exon 1 of 2	1	NM_004316.4	ENSP00000266744.3	P50553
PAH	ENST00000551337.5 link	c.-96+147A>T	intron_variant	Intron 1 of 4	3		ENSP00000447620.1	F8W0A0
PAH	ENST00000547319.1 link	n.216+147A>T	intron_variant	Intron 1 of 2	4
PAH	ENST00000635500.1 link	n.28+147A>T	intron_variant	Intron 1 of 2	3

Frequencies

GnomAD3 genomes

AF:

0.0000132

AC:

AN:

151870

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000484

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

GnomAD4 exome

Data not reliable, filtered out with message: AC0

AF:

0.00

AC:

AN:

255960

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

130180

African (AFR)

AF:

0.00

AC:

AN:

6924

American (AMR)

AF:

0.00

AC:

AN:

6998

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

8780

East Asian (EAS)

AF:

0.00

AC:

AN:

21688

South Asian (SAS)

AF:

0.00

AC:

AN:

4022

European-Finnish (FIN)

AF:

0.00

AC:

AN:

20926

Middle Eastern (MID)

AF:

0.00

AC:

AN:

1278

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

168996

Other (OTH)

AF:

0.00

AC:

AN:

16348

GnomAD4 genome

AF:

0.0000132

AC:

AN:

151870

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74184

show subpopulations

African (AFR)

AF:

0.0000484

AC:

AN:

41330

American (AMR)

AF:

0.00

AC:

AN:

15274

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5156

South Asian (SAS)

AF:

0.00

AC:

AN:

4824

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10582

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

67914

Other (OTH)

AF:

0.00

AC:

AN:

2090

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.550

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00

Hom.:

35582

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.78

CADD

Benign

(source)

DANN

Benign

0.74

PhyloP100

0.36

PromoterAI

-0.079

Neutral

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over