NM_001159702.3:c.946G>C

Variant names:

• chrX-136209928-G-C
• rs56391414
• NM_001159702.3:c.946G>C

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_001159702.3(FHL1):​c.946G>C​(p.Ala316Pro) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A316S) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 22)
• Consequence: FHL1 NM_001159702.3 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 9.60
• Publications: 2 publications found

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]

FHL1 Gene-Disease associations (from GenCC):

• X-linked myopathy with postural muscle atrophy

  Inheritance: XL Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), G2P, Orphanet
• myopathy, reducing body, X-linked, early-onset, severe

  Inheritance: XL Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
• reducing body myopathy

  Inheritance: XL Classification: SUPPORTIVE Submitted by: Orphanet
• X-linked Emery-Dreifuss muscular dystrophy

  Inheritance: XL Classification: SUPPORTIVE Submitted by: Orphanet
• X-linked scapuloperoneal muscular dystrophy

  Inheritance: XL Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001159702.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	FHL1	NM_001159702.3	MANE Plus Clinical	c.946G>C	p.Ala316Pro	missense	Exon 8 of 8	NP_001153174.1	Q13642-2
	FHL1	NM_001159699.2	MANE Select	c.794G>C	p.Cys265Ser	missense	Exon 6 of 6	NP_001153171.1	Q13642-5
	FHL1	NM_001440769.1		c.994G>C	p.Ala332Pro	missense	Exon 7 of 7	NP_001427698.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	FHL1	ENST00000394155.8	TSL:5 MANE Plus Clinical	c.946G>C	p.Ala316Pro	missense	Exon 8 of 8	ENSP00000377710.2	Q13642-2
	FHL1	ENST00000370683.6	TSL:1 MANE Select	c.794G>C	p.Cys265Ser	missense	Exon 6 of 6	ENSP00000359717.1	Q13642-5
	FHL1	ENST00000543669.5	TSL:1	c.746G>C	p.Cys249Ser	missense	Exon 6 of 6	ENSP00000443333.1	Q13642-1

Frequencies

GnomAD3 genomes Cov.: 22

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 22

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	1	-	X-linked myopathy with postural muscle atrophy (1)
-	1	-	X-linked scapuloperoneal muscular dystrophy (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.10
BayesDel_addAF	Pathogenic	0.40	D
BayesDel_noAF	Pathogenic	0.34
CADD	Pathogenic	30
DANN	Uncertain	0.99
DEOGEN2	Benign	0.11	T
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Benign	0.81	T
M_CAP	Pathogenic	0.74	D
MetaRNN	Uncertain	0.46	T
MetaSVM	Pathogenic	0.96	D
MutationAssessor	Benign	0.0	N
PhyloP100		9.6
PrimateAI	Uncertain	0.58	T
PROVEAN	Benign	0.020	N
REVEL	Uncertain	0.41
Sift	Pathogenic	0.0	D
Sift4G	Uncertain	0.051	T
Polyphen		0.98	D
Vest4		0.24
MutPred		0.14		Gain of glycosylation at A316 (P = 0.0299)
MVP		0.97
MPC		1.5
ClinPred		0.88	D
GERP RS		5.6
Varity_R		0.59
Mutation Taster		=3/97	disease causing

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

Other links and lift over

dbSNP: rs56391414; hg19: chrX-135292087;