rs148222901
Variant summary
Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate
The NM_024753.5(TTC21B):āc.2255A>Gā(p.Asn752Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000787 in 1,614,102 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).
Frequency
Consequence
NM_024753.5 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Uncertain_significance. Variant got 0 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | Protein | UniProt |
---|---|---|---|---|---|---|---|---|
TTC21B | NM_024753.5 | c.2255A>G | p.Asn752Ser | missense_variant | 17/29 | ENST00000243344.8 | NP_079029.3 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Protein | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|---|
TTC21B | ENST00000243344.8 | c.2255A>G | p.Asn752Ser | missense_variant | 17/29 | 1 | NM_024753.5 | ENSP00000243344.7 |
Frequencies
GnomAD3 genomes AF: 0.000388 AC: 59AN: 152152Hom.: 0 Cov.: 32
GnomAD3 exomes AF: 0.0000835 AC: 21AN: 251376Hom.: 0 AF XY: 0.0000736 AC XY: 10AN XY: 135862
GnomAD4 exome AF: 0.0000465 AC: 68AN: 1461832Hom.: 0 Cov.: 31 AF XY: 0.0000399 AC XY: 29AN XY: 727220
GnomAD4 genome AF: 0.000387 AC: 59AN: 152270Hom.: 0 Cov.: 32 AF XY: 0.000416 AC XY: 31AN XY: 74442
ClinVar
Submissions by phenotype
Asphyxiating thoracic dystrophy 4;C3151186:Nephronophthisis 12 Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Fulgent Genetics, Fulgent Genetics | Feb 07, 2024 | - - |
Inborn genetic diseases Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Ambry Genetics | Nov 10, 2022 | The c.2255A>G (p.N752S) alteration is located in exon 17 (coding exon 17) of the TTC21B gene. This alteration results from a A to G substitution at nucleotide position 2255, causing the asparagine (N) at amino acid position 752 to be replaced by a serine (S). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. - |
Nephronophthisis 12 Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Baylor Genetics | Jun 26, 2018 | This variant was determined to be of uncertain significance according to ACMG Guidelines, 2015 [PMID:25741868]. - |
TTC21B-related disorder Uncertain:1
Uncertain significance, no assertion criteria provided | clinical testing | PreventionGenetics, part of Exact Sciences | Aug 15, 2024 | The TTC21B c.2255A>G variant is predicted to result in the amino acid substitution p.Asn752Ser. To our knowledge, this variant has not been reported in the literature. This variant is reported in 0.11% of alleles in individuals of African descent in gnomAD. Although we suspect this variant could be benign, at this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. - |
Jeune thoracic dystrophy;C0687120:Nephronophthisis Benign:1
Likely benign, criteria provided, single submitter | clinical testing | Labcorp Genetics (formerly Invitae), Labcorp | Jan 19, 2024 | - - |
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at