chrX-68829909-G-A
Variant summary
Our verdict is Likely pathogenic. Variant got 7 ACMG points: 7P and 0B. PM2PP3_StrongPP5
The NM_004429.5(EFNB1):c.128+5G>A variant causes a splice donor 5th base, intron change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 2/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).
Frequency
Genomes: not found (cov: 24)
Consequence
EFNB1
NM_004429.5 splice_donor_5th_base, intron
NM_004429.5 splice_donor_5th_base, intron
Scores
2
Splicing: ADA: 1.000
2
Clinical Significance
Conservation
PhyloP100: 5.28
Genes affected
EFNB1 (HGNC:3226): (ephrin B1) The protein encoded by this gene is a type I membrane protein and a ligand of Eph-related receptor tyrosine kinases. It may play a role in cell adhesion and function in the development or maintenance of the nervous system. [provided by RefSeq, Jul 2008]
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ACMG classification
Classification made for transcript
Verdict is Likely_pathogenic. Variant got 7 ACMG points.
PM2
?
Very rare variant in population databases, with high coverage;
PP3
?
Splicing scoreres supports a deletorius effect: Scorers claiming Pathogenic: dbscSNV1_ADA, dbscSNV1_RF. Scorers claiming Uncertain: max_spliceai. No scorers claiming Benign.
PP5
?
Variant X-68829909-G-A is Pathogenic according to our data. Variant chrX-68829909-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 981193.We mark this variant Likely_pathogenic, oryginal submissions are: {Uncertain_significance=1, Likely_pathogenic=1}.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
EFNB1 | NM_004429.5 | c.128+5G>A | splice_donor_5th_base_variant, intron_variant | ENST00000204961.5 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
EFNB1 | ENST00000204961.5 | c.128+5G>A | splice_donor_5th_base_variant, intron_variant | 1 | NM_004429.5 | P1 |
Frequencies
GnomAD3 genomes ? Cov.: 24
GnomAD3 genomes
?
Cov.:
24
GnomAD4 exome Cov.: 31
GnomAD4 exome
Cov.:
31
GnomAD4 genome ? Cov.: 24
GnomAD4 genome
?
Cov.:
24
ClinVar
Significance: Conflicting classifications of pathogenicity
Submissions summary: Pathogenic:1Uncertain:1
Revision: criteria provided, conflicting classifications
LINK: link
Submissions by phenotype
Craniofrontonasal syndrome Pathogenic:1
Likely pathogenic, criteria provided, single submitter | clinical testing | Department of Medical Genetics, Oslo University Hospital | Dec 07, 2016 | - - |
not provided Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Apr 30, 2023 | 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. Variants that disrupt the consensus splice site are a relatively common cause of aberrant splicing (PMID: 17576681, 9536098). Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may disrupt the consensus splice site. ClinVar contains an entry for this variant (Variation ID: 981193). This variant has been observed in individual(s) with clinical features of EFNB1-related condition (PMID: 33288889). This variant is not present in population databases (gnomAD no frequency). This sequence change falls in intron 1 of the EFNB1 gene. It does not directly change the encoded amino acid sequence of the EFNB1 protein. It affects a nucleotide within the consensus splice site. - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
BayesDel_noAF
Benign
Cadd
Benign
Dann
Benign
Splicing
Name
Calibrated prediction
Score
Prediction
dbscSNV1_ADA
Pathogenic
dbscSNV1_RF
Pathogenic
SpliceAI score (max)
Details are displayed if max score is > 0.2
DS_DG_spliceai
Position offset: 45
DS_DL_spliceai
Position offset: -5
Find out detailed SpliceAI scores and Pangolin per-transcript scores at