chr14-54842102-A-G
Variant summary
Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_ModerateBP6_ModerateBS1BS2
The NM_000161.3(GCH1):c.*1915T>C variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0148 in 152,340 control chromosomes in the GnomAD database, including 44 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★).
Frequency
Genomes: 𝑓 0.015 ( 44 hom., cov: 32)
Exomes 𝑓: 0.0 ( 0 hom. )
Failed GnomAD Quality Control
Consequence
GCH1
NM_000161.3 3_prime_UTR
NM_000161.3 3_prime_UTR
Scores
2
Clinical Significance
Conservation
PhyloP100: 1.90
Genes affected
GCH1 (HGNC:4193): (GTP cyclohydrolase 1) This gene encodes a member of the GTP cyclohydrolase family. The encoded protein is the first and rate-limiting enzyme in tetrahydrobiopterin (BH4) biosynthesis, catalyzing the conversion of GTP into 7,8-dihydroneopterin triphosphate. BH4 is an essential cofactor required by aromatic amino acid hydroxylases as well as nitric oxide synthases. Mutations in this gene are associated with malignant hyperphenylalaninemia and dopa-responsive dystonia. Several alternatively spliced transcript variants encoding different isoforms have been described; however, not all variants give rise to a functional enzyme. [provided by RefSeq, Jul 2008]
Genome browser will be placed here
ACMG classification
Classification made for transcript
Verdict is Benign. Variant got -12 ACMG points.
BP4
?
Computational evidence support a benign effect (BayesDel_noAF=-0.36).
BP6
?
Variant 14-54842102-A-G is Benign according to our data. Variant chr14-54842102-A-G is described in ClinVar as [Benign]. Clinvar id is 313357.Status of the report is criteria_provided_single_submitter, 1 stars.
BS1
?
Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.0148 (2249/152340) while in subpopulation AFR AF= 0.0496 (2063/41564). AF 95% confidence interval is 0.0479. There are 44 homozygotes in gnomad4. There are 1052 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.
BS2
?
High Homozygotes in GnomAd at 44 SD gene
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
GCH1 | NM_000161.3 | c.*1915T>C | 3_prime_UTR_variant | 6/6 | ENST00000491895.7 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
GCH1 | ENST00000491895.7 | c.*1915T>C | 3_prime_UTR_variant | 6/6 | 1 | NM_000161.3 | P1 |
Frequencies
GnomAD3 genomes ? AF: 0.0147 AC: 2240AN: 152222Hom.: 44 Cov.: 32
GnomAD3 genomes
?
AF:
AC:
2240
AN:
152222
Hom.:
Cov.:
32
Gnomad AFR
AF:
Gnomad AMI
AF:
Gnomad AMR
AF:
Gnomad ASJ
AF:
Gnomad EAS
AF:
Gnomad SAS
AF:
Gnomad FIN
AF:
Gnomad MID
AF:
Gnomad NFE
AF:
Gnomad OTH
AF:
GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0AN: 30Hom.: 0 Cov.: 0 AF XY: 0.00 AC XY: 0AN XY: 22
GnomAD4 exome
Data not reliable, filtered out with message: AC0
AF:
AC:
0
AN:
30
Hom.:
Cov.:
0
AF XY:
AC XY:
0
AN XY:
22
Gnomad4 FIN exome
AF:
Gnomad4 OTH exome
AF:
GnomAD4 genome ? AF: 0.0148 AC: 2249AN: 152340Hom.: 44 Cov.: 32 AF XY: 0.0141 AC XY: 1052AN XY: 74494
GnomAD4 genome
?
AF:
AC:
2249
AN:
152340
Hom.:
Cov.:
32
AF XY:
AC XY:
1052
AN XY:
74494
Gnomad4 AFR
AF:
Gnomad4 AMR
AF:
Gnomad4 ASJ
AF:
Gnomad4 EAS
AF:
Gnomad4 SAS
AF:
Gnomad4 FIN
AF:
Gnomad4 NFE
AF:
Gnomad4 OTH
AF:
Alfa
AF:
Hom.:
Bravo
AF:
Asia WGS
AF:
AC:
39
AN:
3474
ClinVar
Significance: Benign
Submissions summary: Benign:2
Revision: criteria provided, single submitter
LINK: link
Submissions by phenotype
GTP cyclohydrolase I deficiency Benign:1
Benign, criteria provided, single submitter | clinical testing | Illumina Laboratory Services, Illumina | Jan 12, 2018 | This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. - |
Dystonia 5 Benign:1
Benign, criteria provided, single submitter | clinical testing | Illumina Laboratory Services, Illumina | Jan 12, 2018 | This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
BayesDel_noAF
Benign
Cadd
Benign
Dann
Benign
Splicing
Name
Calibrated prediction
Score
Prediction
SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at