19-35282553-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 4P and 1B. PM2PP5_ModerateBP4

The NM_021175.4(HAMP):c.-25G>A variant causes a 5 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000188 in 1,597,270 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★).

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 32)

Exomes 𝑓: 6.9e-7 ( 0 hom. )

Consequence

HAMP
NM_021175.4 5_prime_UTR

Scores

Clinical Significance

Pathogenic criteria provided, single submitter P:2

Conservation

PhyloP100: -0.0530

Variant links:

Genes affected

HAMP (HGNC:15598): (hepcidin antimicrobial peptide) The product encoded by this gene is involved in the maintenance of iron homeostasis, and it is necessary for the regulation of iron storage in macrophages, and for intestinal iron absorption. The preproprotein is post-translationally cleaved into mature peptides of 20, 22 and 25 amino acids, and these active peptides are rich in cysteines, which form intramolecular bonds that stabilize their beta-sheet structures. These peptides exhibit antimicrobial activity against bacteria and fungi. Mutations in this gene cause hemochromatosis type 2B, also known as juvenile hemochromatosis, a disease caused by severe iron overload that results in cardiomyopathy, cirrhosis, and endocrine failure. [provided by RefSeq, Oct 2014]

HAMP links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP5

Variant 19-35282553-G-A is Pathogenic according to our data. Variant chr19-35282553-G-A is described in ClinVar as [Pathogenic]. Clinvar id is 4287.Status of the report is criteria_provided_single_submitter, 1 stars. Variant chr19-35282553-G-A is described in Lovd as [Likely_pathogenic].

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.78).. Strength limited to SUPPORTING due to the PP5.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
HAMP	NM_021175.4 linkuse as main transcript	c.-25G>A		5_prime_UTR_variant	1/3	ENST00000222304.5

Ensembl

Gene	Transcript	HGVSc	Effect	#exon/exons	TSL	MANE	Appris
HAMP	ENST00000222304.5 linkuse as main transcript	c.-25G>A	5_prime_UTR_variant	1/3	1	NM_021175.4	P1
HAMP	ENST00000598398.5 linkuse as main transcript	c.-25G>A	5_prime_UTR_variant	2/4	2		P1
HAMP	ENST00000593580.1 linkuse as main transcript	n.37G>A	non_coding_transcript_exon_variant	1/1

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152246

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

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

AF:

6.92e-7

AC:

AN:

1445024

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

720086

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:

9.12e-7

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152246

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74382

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000131

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.00000378

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:2

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Hereditary hemochromatosis

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Invitae

Oct 04, 2023

This variant occurs in a non-coding region of the HAMP gene. It does not change the encoded amino acid sequence of the HAMP protein. This variant is present in population databases (no rsID available, gnomAD 0.1%). This variant has been observed in individuals with hereditary hemochromatosis (PMID: 15198949, 27007796). It has also been observed to segregate with disease in related individuals. This variant is also known as +14G>A. ClinVar contains an entry for this variant (Variation ID: 4287). Studies have shown that this variant alters HAMP gene expression (PMID: 15198949). For these reasons, this variant has been classified as Pathogenic. -

Hemochromatosis type 2B

Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Oct 01, 2004

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.78

Cadd

Benign

5.9

Dann

Benign

0.80

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over