rs397514568
Variant summary
Our verdict is Likely pathogenic. Variant got 9 ACMG points: 9P and 0B. PM1PM2PP2PP3_Strong
The NM_178012.5(TUBB2B):c.767A>G(p.Asn256Ser) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).
Frequency
Genomes: not found (cov: 17)
Consequence
TUBB2B
NM_178012.5 missense
NM_178012.5 missense
Scores
10
6
2
Clinical Significance
Conservation
PhyloP100: 7.74
Genes affected
TUBB2B (HGNC:30829): (tubulin beta 2B class IIb) The protein encoded by this gene is a beta isoform of tubulin, which binds GTP and is a major component of microtubules. This gene is highly similar to TUBB2A and TUBB2C. Defects in this gene are a cause of asymmetric polymicrogyria. [provided by RefSeq, Mar 2010]
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ACMG classification
Classification made for transcript
Verdict is Likely_pathogenic. Variant got 9 ACMG points.
PM1
?
In a hotspot region, there are 3 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 4 uncertain in NM_178012.5
PM2
?
Very rare variant in population databases, with high coverage;
PP2
?
Missense variant where missense usually causes diseases, TUBB2B
PP3
?
MetaRNN computational evidence supports a deleterious effect, 0.964
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
TUBB2B | NM_178012.5 | c.767A>G | p.Asn256Ser | missense_variant | 4/4 | ENST00000259818.8 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
TUBB2B | ENST00000259818.8 | c.767A>G | p.Asn256Ser | missense_variant | 4/4 | 1 | NM_178012.5 | P1 |
Frequencies
GnomAD3 genomes ? Cov.: 17
GnomAD3 genomes
?
Cov.:
17
GnomAD4 exome Cov.: 33
GnomAD4 exome
Cov.:
33
GnomAD4 genome ? Cov.: 17
GnomAD4 genome
?
Cov.:
17
ClinVar
Significance: Conflicting classifications of pathogenicity
Submissions summary: Pathogenic:1Uncertain:1
Revision: no assertion criteria provided
LINK: link
Submissions by phenotype
Complex cortical dysplasia with other brain malformations 7 Pathogenic:1Uncertain:1
Pathogenic, no assertion criteria provided | literature only | OMIM | Sep 01, 2012 | - - |
Uncertain significance, no assertion criteria provided | clinical testing | Foundation for Research in Genetics and Endocrinology, FRIGE's Institute of Human Genetics | Nov 12, 2018 | The observed variant c.767A>G (p.Asn256Ser) has not been reported in 1000 Genomes and ExAC databases. The in silico prediction of the given variant is possibly damaging by PolyPhen-2 and damaging by MutationTaster2, SIFT and LRT. - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Pathogenic
BayesDel_addAF
Uncertain
D
BayesDel_noAF
Benign
Cadd
Pathogenic
Dann
Uncertain
DEOGEN2
Uncertain
D
Eigen
Pathogenic
Eigen_PC
Pathogenic
FATHMM_MKL
Pathogenic
D
LIST_S2
Pathogenic
D
M_CAP
Pathogenic
D
MetaRNN
Pathogenic
D
MetaSVM
Uncertain
D
MutationAssessor
Pathogenic
M
MutationTaster
Benign
D
PrimateAI
Pathogenic
D
PROVEAN
Uncertain
D
REVEL
Pathogenic
Sift4G
Uncertain
D
Polyphen
P
Vest4
MutPred
Gain of methylation at K252 (P = 0.1161);
MVP
ClinPred
D
GERP RS
Varity_R
gMVP
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