NM_001166355.2:c.63G>T
Variant names:
Variant summary
Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate
The NM_001166355.2(LFNG):c.63G>T(p.Trp21Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000124 in 1,613,624 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/17 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another nucleotide change resulting in the same amino acid substitution has been previously reported as Benign in ClinVar.
Frequency
Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)
Exomes 𝑓: 6.8e-7 ( 0 hom. )
Consequence
LFNG
NM_001166355.2 missense
NM_001166355.2 missense
Scores
1
14
Clinical Significance
Not reported in ClinVar
Conservation
PhyloP100: -0.610
Publications
1 publications found
Genes affected
LFNG (HGNC:6560): (LFNG O-fucosylpeptide 3-beta-N-acetylglucosaminyltransferase) This gene is a member of the glycosyltransferase 31 gene family. Members of this gene family, which also includes the MFNG (GeneID: 4242) and RFNG (GeneID: 5986) genes, encode evolutionarily conserved glycosyltransferases that act in the Notch signaling pathway to define boundaries during embryonic development. While their genomic structure is distinct from other glycosyltransferases, these proteins have a fucose-specific beta-1,3-N-acetylglucosaminyltransferase activity that leads to elongation of O-linked fucose residues on Notch, which alters Notch signaling. The protein encoded by this gene is predicted to be a single-pass type II Golgi membrane protein but it may also be secreted and proteolytically processed like the related proteins in mouse and Drosophila (PMID: 9187150). Mutations in this gene have been associated with autosomal recessive spondylocostal dysostosis 3. [provided by RefSeq, May 2018]
LFNG Gene-Disease associations (from GenCC):
- spondylocostal dysostosis 3, autosomal recessiveInheritance: AR Classification: DEFINITIVE, STRONG, MODERATE Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), G2P
- autosomal recessive spondylocostal dysostosisInheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
Genome browser will be placed here
ACMG classification
Classification was made for transcript
Our verdict: Uncertain_significance. The variant received 0 ACMG points.
PM2
Very rare variant in population databases, with high coverage;
BP4
Computational evidence support a benign effect (MetaRNN=0.10381386).
Transcripts
RefSeq
Ensembl
Frequencies
GnomAD3 genomes 0.00000657 AC: 1AN: 152118Hom.: 0 Cov.: 32 show subpopulations
GnomAD3 genomes
AF:
AC:
1
AN:
152118
Hom.:
Cov.:
32
Gnomad AFR
AF:
Gnomad AMI
AF:
Gnomad AMR
AF:
Gnomad ASJ
AF:
Gnomad EAS
AF:
Gnomad SAS
AF:
Gnomad FIN
AF:
Gnomad MID
AF:
Gnomad NFE
AF:
Gnomad OTH
AF:
GnomAD2 exomes AF: 0.00000406 AC: 1AN: 246316 AF XY: 0.00000746 show subpopulations
GnomAD2 exomes
AF:
AC:
1
AN:
246316
AF XY:
Gnomad AFR exome
AF:
Gnomad AMR exome
AF:
Gnomad ASJ exome
AF:
Gnomad EAS exome
AF:
Gnomad FIN exome
AF:
Gnomad NFE exome
AF:
Gnomad OTH exome
AF:
GnomAD4 exome AF: 6.84e-7 AC: 1AN: 1461506Hom.: 0 Cov.: 33 AF XY: 0.00000138 AC XY: 1AN XY: 727044 show subpopulations ⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.
GnomAD4 exome
AF:
AC:
1
AN:
1461506
Hom.:
Cov.:
33
AF XY:
AC XY:
1
AN XY:
727044
show subpopulations
⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.
African (AFR)
AF:
AC:
0
AN:
33474
American (AMR)
AF:
AC:
0
AN:
44716
Ashkenazi Jewish (ASJ)
AF:
AC:
0
AN:
26136
East Asian (EAS)
AF:
AC:
0
AN:
39700
South Asian (SAS)
AF:
AC:
0
AN:
86248
European-Finnish (FIN)
AF:
AC:
0
AN:
53344
Middle Eastern (MID)
AF:
AC:
0
AN:
5722
European-Non Finnish (NFE)
AF:
AC:
1
AN:
1111798
Other (OTH)
AF:
AC:
0
AN:
60368
⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.
Allele Balance Distribution
Red line indicates average allele balance
Average allele balance: 0.375
Heterozygous variant carriers
0
0
1
1
2
2
0.00
0.20
0.40
0.60
0.80
0.95
Allele balance
GnomAD4 genome 0.00000657 AC: 1AN: 152118Hom.: 0 Cov.: 32 AF XY: 0.0000135 AC XY: 1AN XY: 74308 show subpopulations
GnomAD4 genome
AF:
AC:
1
AN:
152118
Hom.:
Cov.:
32
AF XY:
AC XY:
1
AN XY:
74308
show subpopulations
African (AFR)
AF:
AC:
0
AN:
41404
American (AMR)
AF:
AC:
0
AN:
15262
Ashkenazi Jewish (ASJ)
AF:
AC:
0
AN:
3472
East Asian (EAS)
AF:
AC:
0
AN:
5192
South Asian (SAS)
AF:
AC:
0
AN:
4832
European-Finnish (FIN)
AF:
AC:
0
AN:
10610
Middle Eastern (MID)
AF:
AC:
0
AN:
316
European-Non Finnish (NFE)
AF:
AC:
1
AN:
68026
Other (OTH)
AF:
AC:
0
AN:
2092
Allele Balance Distribution
Red line indicates average allele balance
Average allele balance: 0.575
Heterozygous variant carriers
0
0
1
1
2
2
0.00
0.20
0.40
0.60
0.80
0.95
Allele balance
Alfa
AF:
Hom.:
Bravo
AF:
ClinVar
Not reported inComputational scores
Source:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Benign
BayesDel_addAF
Benign
T
BayesDel_noAF
Benign
DANN
Benign
Eigen
Benign
Eigen_PC
Benign
FATHMM_MKL
Benign
N
LIST_S2
Benign
T
M_CAP
Benign
T
MetaRNN
Benign
T
MetaSVM
Benign
T
PhyloP100
PROVEAN
Benign
N
REVEL
Benign
Sift
Pathogenic
D
Vest4
MutPred
Loss of helix (P = 0.0304);
MVP
ClinPred
T
GERP RS
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at
Publications
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