rs1556638935

Variant names:

• chrX-136207170-G-GC
• rs1556638935
• NM_001159702.3:c.312dupC

Variant summary

Our verdict is Pathogenic. The variant received 12 ACMG points: 12P and 0B. PVS1 PM2 PP5_Moderate

The ENST00000370683.6(FHL1):​c.360dupC​(p.Phe121LeufsTer26) variant causes a frameshift change. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Pathogenic (★). Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 23)
• Consequence: FHL1 ENST00000370683.6 frameshift
• Clinical Significance: Pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 4.97
• Publications: 0 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), Orphanet, G2P
• 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: Pathogenic. The variant received 12 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant X-136207170-G-GC is Pathogenic according to our data. Variant chrX-136207170-G-GC is described in ClinVar as Pathogenic. ClinVar VariationId is 537356.Status of the report is criteria_provided_single_submitter, 1 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: ENST00000370683.6. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	FHL1	NM_001159702.3	MANE Plus Clinical	c.312dupC	p.Phe105LeufsTer26	frameshift	Exon 4 of 8	NP_001153174.1
	FHL1	NM_001159699.2	MANE Select	c.360dupC	p.Phe121LeufsTer26	frameshift	Exon 3 of 6	NP_001153171.1
	FHL1	NM_001440769.1		c.360dupC	p.Phe121LeufsTer26	frameshift	Exon 3 of 7	NP_001427698.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	FHL1	ENST00000394155.8	TSL:5 MANE Plus Clinical	c.312dupC	p.Phe105LeufsTer26	frameshift	Exon 4 of 8	ENSP00000377710.2
	FHL1	ENST00000370683.6	TSL:1 MANE Select	c.360dupC	p.Phe121LeufsTer26	frameshift	Exon 3 of 6	ENSP00000359717.1
	FHL1	ENST00000543669.5	TSL:1	c.312dupC	p.Phe105LeufsTer26	frameshift	Exon 3 of 6	ENSP00000443333.1

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 23

ClinVar

ClinVar submissions as Germline

Significance: Pathogenic

Revision: criteria provided, single submitter

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

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		5.0
Mutation Taster		=0/200	disease causing (ClinVar)

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: rs1556638935; hg19: chrX-135289329;