18-57545573-G-A

Position:

• chr18-57545573-G-A

Variant summary

Our verdict is Benign. Variant got -14 ACMG points: 0P and 14B. BP4_Strong BP6_Moderate BS1 BS2

The NM_000140.5(FECH):​c.*5139C>T variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00657 in 152,294 control chromosomes in the GnomAD database, including 15 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

• Frequency: Genomes: 𝑓 0.0066 (15 hom., cov: 33)
• Consequence: FECH NM_000140.5 3_prime_UTR
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -0.289

Genes affected

FECH (HGNC:3647): (ferrochelatase) The protein encoded by this gene is localized to the mitochondrion, where it catalyzes the insertion of the ferrous form of iron into protoporphyrin IX in the heme synthesis pathway. Mutations in this gene are associated with erythropoietic protoporphyria. Two transcript variants encoding different isoforms have been found for this gene. A pseudogene of this gene is found on chromosome 3.[provided by RefSeq, May 2010]

ACMG classification

Verdict is Benign. Variant got -14 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.82).
• BP6: Variant 18-57545573-G-A is Benign according to our data. Variant chr18-57545573-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 327324.Status of the report is criteria_provided_single_submitter, 1 stars.
• BS1: Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00657 (1001/152294) while in subpopulation AFR AF= 0.0216 (898/41556). AF 95% confidence interval is 0.0204. There are 15 homozygotes in gnomad4. There are 475 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.
• BS2: High Homozygotes in GnomAd4 at 15 AD,AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
FECH	NM_000140.5	c.*5139C>T		3_prime_UTR_variant	11/11	ENST00000262093.11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
FECH	ENST00000262093.11	c.*5139C>T		3_prime_UTR_variant	11/11	1	NM_000140.5
FECH	ENST00000652755.1	c.*5139C>T		3_prime_UTR_variant	11/11

Frequencies

GnomAD3 genomes AF: 0.00657 AC: 1000 AN: 152176 Hom.: 15 Cov.: 33

Gnomad AFR AF: 0.0217

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00491

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.000384

Gnomad SAS AF: 0.000621

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000735

Gnomad OTH AF: 0.00813

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.00657 AC: 1001 AN: 152294 Hom.: 15 Cov.: 33 AF XY: 0.00638 AC XY: 475 AN XY: 74468

Gnomad4 AFR AF: 0.0216

Gnomad4 AMR AF: 0.00490

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.000578

Gnomad4 SAS AF: 0.000622

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000735

Gnomad4 OTH AF: 0.00804

Alfa AF: 0.000137 Hom.: 0

Bravo AF: 0.00829

Asia WGS AF: 0.00260 AC: 9 AN: 3478

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

Protoporphyria, erythropoietic, 1 Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jun 14, 2016

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.82
CADD	Benign	3.0
DANN	Benign	0.63

Splicing

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

Publications

LitVar

Other links and lift over

dbSNP: rs151197779; hg19: chr18-55212805;