2-29214043-G-C
Variant summary
Our verdict is Uncertain significance. Variant got 3 ACMG points: 4P and 1B. PM1PM2BP4
The NM_004304.5(ALK):c.3684C>G(p.His1228Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,804 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Another nucleotide change resulting in same amino acid change has been previously reported as Uncertain significancein ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. H1228Y) has been classified as Uncertain significance.
Frequency
Consequence
NM_004304.5 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Uncertain_significance. Variant got 3 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
ALK | NM_004304.5 | c.3684C>G | p.His1228Gln | missense_variant | 24/29 | ENST00000389048.8 | |
ALK | NM_001353765.2 | c.480C>G | p.His160Gln | missense_variant | 5/10 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
ALK | ENST00000389048.8 | c.3684C>G | p.His1228Gln | missense_variant | 24/29 | 1 | NM_004304.5 | P1 |
Frequencies
GnomAD3 genomes ? Cov.: 32
GnomAD4 exome AF: 6.84e-7 AC: 1AN: 1461804Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0AN XY: 727212
GnomAD4 genome ? Cov.: 32
ClinVar
Submissions by phenotype
Neuroblastoma, susceptibility to, 3 Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Oct 03, 2023 | This sequence change replaces histidine, which is basic and polar, with glutamine, which is neutral and polar, at codon 1228 of the ALK protein (p.His1228Gln). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with ALK-related conditions. ClinVar contains an entry for this variant (Variation ID: 538206). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be disruptive. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. - |
not provided Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | GeneDx | Jan 24, 2023 | Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Has not been previously published as pathogenic or benign to our knowledge; This variant is associated with the following publications: (PMID: 35437925) - |
Hereditary cancer-predisposing syndrome Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Ambry Genetics | Feb 24, 2024 | The p.H1228Q variant (also known as c.3684C>G), located in coding exon 24 of the ALK gene, results from a C to G substitution at nucleotide position 3684. The histidine at codon 1228 is replaced by glutamine, an amino acid with highly similar properties. This amino acid position is not well conserved in available vertebrate species. In addition, the in silico prediction for this alteration is inconclusive. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. - |
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at