rs971444878
Variant summary
Our verdict is Likely benign. Variant got -3 ACMG points: 0P and 3B. BP4_ModerateBP6
The NM_004064.5(CDKN1B):c.203A>G(p.Lys68Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000805 in 1,614,122 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. K68E) has been classified as Uncertain significance.
Frequency
Consequence
NM_004064.5 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Likely_benign. Variant got -3 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
CDKN1B | NM_004064.5 | c.203A>G | p.Lys68Arg | missense_variant | 1/3 | ENST00000228872.9 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
CDKN1B | ENST00000228872.9 | c.203A>G | p.Lys68Arg | missense_variant | 1/3 | 1 | NM_004064.5 | P1 |
Frequencies
GnomAD3 genomes ? AF: 0.00000657 AC: 1AN: 152230Hom.: 0 Cov.: 33
GnomAD3 exomes AF: 0.00000398 AC: 1AN: 251464Hom.: 0 AF XY: 0.00 AC XY: 0AN XY: 135922
GnomAD4 exome AF: 0.00000821 AC: 12AN: 1461892Hom.: 0 Cov.: 52 AF XY: 0.00000825 AC XY: 6AN XY: 727246
GnomAD4 genome ? AF: 0.00000657 AC: 1AN: 152230Hom.: 0 Cov.: 33 AF XY: 0.00 AC XY: 0AN XY: 74370
ClinVar
Submissions by phenotype
Multiple endocrine neoplasia type 4 Uncertain:2
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Dec 18, 2023 | This sequence change replaces lysine, which is basic and polar, with arginine, which is basic and polar, at codon 68 of the CDKN1B protein (p.Lys68Arg). This variant is present in population databases (no rsID available, gnomAD 0.0009%). This variant has not been reported in the literature in individuals affected with CDKN1B-related conditions. ClinVar contains an entry for this variant (Variation ID: 469004). Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Not Available"; PolyPhen-2: "Benign"; Align-GVGD: "Not Available". The arginine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. 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. - |
Uncertain significance, criteria provided, single submitter | clinical testing | Baylor Genetics | Dec 09, 2020 | This variant was determined to be of uncertain significance according to ACMG Guidelines, 2015 [PMID:25741868]. - |
Hereditary cancer-predisposing syndrome Benign:1
Likely benign, criteria provided, single submitter | clinical testing | Ambry Genetics | Jan 23, 2024 | This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. - |
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at