rs746834335

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 0P and 6B. BP4_ModerateBS2

The NM_001159699.2(FHL1):​c.239C>A​(p.Thr80Asn) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000082 in 1,097,981 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 3 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. 14/19 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: not found (cov: 24)
Exomes 𝑓: 0.0000082 ( 0 hom. 3 hem. )

Consequence

FHL1
NM_001159699.2 missense

Scores

1
16

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:3B:1

Conservation

PhyloP100: 0.129
Variant links:
Genes affected
FHL1 (HGNC:3702): (four and a half LIM domains 1) This gene encodes a member of the four-and-a-half-LIM-only protein family. Family members contain two highly conserved, tandemly arranged, zinc finger domains with four highly conserved cysteines binding a zinc atom in each zinc finger. Expression of these family members occurs in a cell- and tissue-specific mode and these proteins are involved in many cellular processes. Mutations in this gene have been found in patients with Emery-Dreifuss muscular dystrophy. Multiple alternately spliced transcript variants which encode different protein isoforms have been described.[provided by RefSeq, Nov 2009]

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -6 ACMG points.

BP4
Computational evidence support a benign effect (MetaRNN=0.17033195).
BS2
High Hemizygotes in GnomAdExome4 at 3 XL gene

Transcripts

RefSeq

Gene Transcript HGVSc HGVSp Effect Exon rank MANE Protein UniProt
FHL1NM_001159702.3 linkc.191C>A p.Thr64Asn missense_variant Exon 4 of 8 ENST00000394155.8 NP_001153174.1 Q13642-2
FHL1NM_001159699.2 linkc.239C>A p.Thr80Asn missense_variant Exon 3 of 6 ENST00000370683.6 NP_001153171.1 Q13642-5

Ensembl

Gene Transcript HGVSc HGVSp Effect Exon rank TSL MANE Protein Appris UniProt
FHL1ENST00000394155.8 linkc.191C>A p.Thr64Asn missense_variant Exon 4 of 8 5 NM_001159702.3 ENSP00000377710.2 Q13642-2
FHL1ENST00000370683.6 linkc.239C>A p.Thr80Asn missense_variant Exon 3 of 6 1 NM_001159699.2 ENSP00000359717.1 Q13642-5

Frequencies

GnomAD3 genomes
Cov.:
24
GnomAD3 exomes
AF:
0.00000546
AC:
1
AN:
183137
Hom.:
0
AF XY:
0.00
AC XY:
0
AN XY:
67645
show subpopulations
Gnomad AFR exome
AF:
0.00
Gnomad AMR exome
AF:
0.00
Gnomad ASJ exome
AF:
0.00
Gnomad EAS exome
AF:
0.00
Gnomad SAS exome
AF:
0.00
Gnomad FIN exome
AF:
0.00
Gnomad NFE exome
AF:
0.0000123
Gnomad OTH exome
AF:
0.00
GnomAD4 exome
AF:
0.00000820
AC:
9
AN:
1097981
Hom.:
0
Cov.:
31
AF XY:
0.00000826
AC XY:
3
AN XY:
363407
show subpopulations
Gnomad4 AFR exome
AF:
0.00
Gnomad4 AMR exome
AF:
0.00
Gnomad4 ASJ exome
AF:
0.00
Gnomad4 EAS exome
AF:
0.00
Gnomad4 SAS exome
AF:
0.00
Gnomad4 FIN exome
AF:
0.00
Gnomad4 NFE exome
AF:
0.00000950
Gnomad4 OTH exome
AF:
0.0000217
GnomAD4 genome
Cov.:
24
Alfa
AF:
0.0000434
Hom.:
0
Bravo
AF:
0.0000189

ClinVar

Significance: Conflicting classifications of pathogenicity
Submissions summary: Uncertain:3Benign:1
Revision: criteria provided, conflicting classifications
LINK: link

Submissions by phenotype

Uruguay Faciocardiomusculoskeletal syndrome;C2678055:X-linked myopathy with postural muscle atrophy;C2678061:X-linked scapuloperoneal muscular dystrophy;C4225159:Myopathy, reducing body, X-linked, childhood-onset;C4225423:Myopathy, reducing body, X-linked, early-onset, severe Uncertain:1
Oct 28, 2021
Fulgent Genetics, Fulgent Genetics
Significance: Uncertain significance
Review Status: criteria provided, single submitter
Collection Method: clinical testing

- -

X-linked myopathy with postural muscle atrophy Uncertain:1
Dec 16, 2024
Labcorp Genetics (formerly Invitae), Labcorp
Significance: Uncertain significance
Review Status: criteria provided, single submitter
Collection Method: clinical testing

This sequence change replaces threonine, which is neutral and polar, with asparagine, which is neutral and polar, at codon 64 of the FHL1 protein (p.Thr64Asn). This variant is present in population databases (no rsID available, gnomAD 0.001%). This variant has not been reported in the literature in individuals affected with FHL1-related conditions. ClinVar contains an entry for this variant (Variation ID: 838581). An algorithm developed to predict the effect of missense changes on protein structure and function outputs the following: PolyPhen-2: "Benign". The asparagine 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. -

not provided Uncertain:1
Dec 08, 2020
Revvity Omics, Revvity
Significance: Uncertain significance
Review Status: criteria provided, single submitter
Collection Method: clinical testing

- -

Cardiovascular phenotype Benign:1
Jun 01, 2024
Ambry Genetics
Significance: Likely benign
Review Status: criteria provided, single submitter
Collection Method: clinical testing

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: dbNSFP v4.3

Name
Calibrated prediction
Score
Prediction
AlphaMissense
Benign
0.084
BayesDel_addAF
Benign
-0.19
T
BayesDel_noAF
Benign
-0.51
CADD
Benign
15
DANN
Benign
0.89
DEOGEN2
Benign
0.21
.;T;.;T;.;T;T;T;.;.;T;T;.;T;T;.;.;T;.;T;T;.;.;.;T;T;.
FATHMM_MKL
Benign
0.38
N
LIST_S2
Benign
0.77
.;T;.;T;T;T;T;T;T;.;T;.;.;T;T;.;T;T;T;T;.;.;T;T;T;T;.
M_CAP
Uncertain
0.24
D
MetaRNN
Benign
0.17
T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T
MetaSVM
Benign
-0.78
T
MutationAssessor
Benign
0.69
N;N;N;.;N;.;.;.;.;N;.;.;N;.;.;N;N;.;.;.;N;.;.;.;.;.;N
PrimateAI
Benign
0.39
T
PROVEAN
Benign
0.13
.;N;N;.;.;N;N;.;.;.;.;N;N;.;N;N;N;N;.;N;N;.;N;N;N;N;.
REVEL
Benign
0.15
Sift
Benign
0.49
.;T;T;.;.;T;T;.;.;.;.;T;T;.;T;T;T;T;.;T;T;.;T;T;T;T;.
Sift4G
Benign
0.51
T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T
Polyphen
0.0040, 0.0
.;B;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;B;.;.;.;B;.;.
Vest4
0.23
MVP
0.46
MPC
0.60
ClinPred
0.028
T
GERP RS
4.0
Varity_R
0.070

Splicing

Name
Calibrated prediction
Score
Prediction
SpliceAI score (max)
0.0
Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Other links and lift over

dbSNP: rs746834335; hg19: chrX-135289209; API