1-241500598-T-TGAGAGAGA

Variant names:

• chr1-241500598-T-TGAGAGAGA
• rs1553340717
• NM_000143.4:c.1237-9_1237-8insTCTCTCTC

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 0P and 2B. BP6_Moderate

The NM_000143.4(FH):​c.1237-9_1237-8insTCTCTCTC variant causes a intron change involving the alteration of a non-conserved nucleotide. Variant has been reported in ClinVar as Likely benign (★).

• Frequency:
  • Genomes: 𝑓 0.000017 (0 hom., cov: 30)
  • Exomes 𝑓: 0.0000015 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: FH NM_000143.4 intron
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -0.0410
• Publications: 0 publications found

Genes affected

FH (HGNC:3700): (fumarate hydratase) The protein encoded by this gene is an enzymatic component of the tricarboxylic acid (TCA) cycle, or Krebs cycle, and catalyzes the formation of L-malate from fumarate. It exists in both a cytosolic form and an N-terminal extended form, differing only in the translation start site used. The N-terminal extended form is targeted to the mitochondrion, where the removal of the extension generates the same form as in the cytoplasm. It is similar to some thermostable class II fumarases and functions as a homotetramer. Mutations in this gene can cause fumarase deficiency and lead to progressive encephalopathy. [provided by RefSeq, Jul 2008]

FH Gene-Disease associations (from GenCC):

• hereditary leiomyomatosis and renal cell cancer

  Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: ClinGen, Ambry Genetics, G2P, Genomics England PanelApp, Labcorp Genetics (formerly Invitae), Orphanet
• fumaric aciduria

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: G2P, Orphanet, Labcorp Genetics (formerly Invitae), Ambry Genetics
• pheochromocytoma-paraganglioma

  Inheritance: AD Classification: STRONG Submitted by: Ambry Genetics
• leiomyosarcoma

  Inheritance: AD Classification: MODERATE Submitted by: Genomics England PanelApp
• hereditary pheochromocytoma-paraganglioma

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• BP6: Variant 1-241500598-T-TGAGAGAGA is Benign according to our data. Variant chr1-241500598-T-TGAGAGAGA is described in ClinVar as Likely_benign. ClinVar VariationId is 2163160.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
FH	NM_000143.4	c.1237-9_1237-8insTCTCTCTC		intron_variant	Intron 8 of 9	ENST00000366560.4	NP_000134.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
FH	ENST00000366560.4	c.1237-9_1237-8insTCTCTCTC		intron_variant	Intron 8 of 9	1	NM_000143.4	ENSP00000355518.4

Frequencies

GnomAD3 genomes AF: 0.0000172 AC: 1 AN: 58088 Hom.: 0 Cov.: 30

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000158

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

GnomAD4 exome Data not reliable, filtered out with message: AS_VQSR AF: 0.00000148 AC: 2 AN: 1353700 Hom.: 0 Cov.: 33 AF XY: 0.00 AC XY: 0 AN XY: 675632

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 31384

American (AMR) AF: 0.00 AC: 0 AN: 43526

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 24826

East Asian (EAS) AF: 0.0000262 AC: 1 AN: 38100

South Asian (SAS) AF: 0.00 AC: 0 AN: 83120

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 45980

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4862

European-Non Finnish (NFE) AF: 9.75e-7 AC: 1 AN: 1025886

Other (OTH) AF: 0.00 AC: 0 AN: 56016

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.0000812204), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Data not reliable, filtered out with message: AS_VQSR AF: 0.0000172 AC: 1 AN: 58088 Hom.: 0 Cov.: 30 AF XY: 0.0000356 AC XY: 1 AN XY: 28100

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 13730

American (AMR) AF: 0.000158 AC: 1 AN: 6312

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 1700

East Asian (EAS) AF: 0.00 AC: 0 AN: 2682

South Asian (SAS) AF: 0.00 AC: 0 AN: 1772

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 3546

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 144

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 27040

Other (OTH) AF: 0.00 AC: 0 AN: 848

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5. (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

Alfa AF: 0.00 Hom.: 0

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Benign:1

May 02, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
PhyloP100		-0.041

Splicing

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

Other links and lift over

dbSNP: rs1553340717; hg19: chr1-241663898;