rs8192605
Variant summary
Our verdict is Benign. Variant got -14 ACMG points: 0P and 14B. BP4_StrongBP6BP7BS1BS2
The NM_000939.4(POMC):c.18C>T(p.Cys6=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00721 in 1,614,006 control chromosomes in the GnomAD database, including 59 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).
Frequency
Genomes: 𝑓 0.0055 ( 7 hom., cov: 33)
Exomes 𝑓: 0.0074 ( 52 hom. )
Consequence
POMC
NM_000939.4 synonymous
NM_000939.4 synonymous
Scores
2
Clinical Significance
Conservation
PhyloP100: 0.712
Genes affected
POMC (HGNC:9201): (proopiomelanocortin) This gene encodes a preproprotein that undergoes extensive, tissue-specific, post-translational processing via cleavage by subtilisin-like enzymes known as prohormone convertases. There are eight potential cleavage sites within the preproprotein and, depending on tissue type and the available convertases, processing may yield as many as ten biologically active peptides involved in diverse cellular functions. The encoded protein is synthesized mainly in corticotroph cells of the anterior pituitary where four cleavage sites are used; adrenocorticotrophin, essential for normal steroidogenesis and the maintenance of normal adrenal weight, and lipotropin beta are the major end products. In other tissues, including the hypothalamus, placenta, and epithelium, all cleavage sites may be used, giving rise to peptides with roles in pain and energy homeostasis, melanocyte stimulation, and immune modulation. These include several distinct melanotropins, lipotropins, and endorphins that are contained within the adrenocorticotrophin and beta-lipotropin peptides. The antimicrobial melanotropin alpha peptide exhibits antibacterial and antifungal activity. Mutations in this gene have been associated with early onset obesity, adrenal insufficiency, and red hair pigmentation. Alternatively spliced transcript variants encoding the same protein have been described. [provided by RefSeq, Jan 2016]
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ACMG classification
Classification made for transcript
Verdict is Benign. Variant got -14 ACMG points.
BP4
?
Computational evidence support a benign effect (BayesDel_noAF=-0.83).
BP6
?
Variant 2-25164755-G-A is Benign according to our data. Variant chr2-25164755-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 335358.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=2, Uncertain_significance=1, Benign=1}.
BP7
?
Synonymous conserved (PhyloP=0.712 with no splicing effect.
BS1
?
Variant frequency is greater than expected in population amr. gnomad4 allele frequency = 0.00548 (835/152360) while in subpopulation AMR AF= 0.00863 (132/15302). AF 95% confidence interval is 0.00743. There are 7 homozygotes in gnomad4. There are 391 alleles in male gnomad4 subpopulation. This position pass quality control queck.
BS2
?
High Homozygotes in GnomAd at 7 SD gene
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
POMC | NM_000939.4 | c.18C>T | p.Cys6= | synonymous_variant | 2/3 | ENST00000395826.7 | |
POMC | NM_001035256.3 | c.18C>T | p.Cys6= | synonymous_variant | 3/4 | ||
POMC | NM_001319204.2 | c.18C>T | p.Cys6= | synonymous_variant | 3/4 | ||
POMC | NM_001319205.2 | c.18C>T | p.Cys6= | synonymous_variant | 2/3 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
POMC | ENST00000395826.7 | c.18C>T | p.Cys6= | synonymous_variant | 2/3 | 2 | NM_000939.4 | P1 |
Frequencies
GnomAD3 genomes ? AF: 0.00548 AC: 835AN: 152242Hom.: 7 Cov.: 33
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GnomAD3 exomes AF: 0.00582 AC: 1460AN: 251032Hom.: 12 AF XY: 0.00583 AC XY: 792AN XY: 135800
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GnomAD4 exome AF: 0.00739 AC: 10799AN: 1461646Hom.: 52 Cov.: 31 AF XY: 0.00729 AC XY: 5303AN XY: 727140
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ClinVar
Significance: Conflicting classifications of pathogenicity
Submissions summary: Uncertain:1Benign:4
Revision: criteria provided, conflicting classifications
LINK: link
Submissions by phenotype
not provided Benign:2
Likely benign, criteria provided, single submitter | clinical testing | CeGaT Center for Human Genetics Tuebingen | Mar 01, 2024 | POMC: BP4, BP7, BS2 - |
Benign, criteria provided, single submitter | clinical testing | Invitae | Jan 12, 2024 | - - |
Obesity Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Illumina Laboratory Services, Illumina | Jan 13, 2018 | This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. - |
not specified Benign:1
Benign, no assertion criteria provided | clinical testing | Genetic Services Laboratory, University of Chicago | May 09, 2022 | - - |
Obesity due to pro-opiomelanocortin deficiency Benign:1
Likely benign, criteria provided, single submitter | clinical testing | Illumina Laboratory Services, Illumina | Jan 13, 2018 | This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as likely benign is not then subjected to further curation. The score for this variant resulted in a classification of likely benign for this disease. - |
Computational scores
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Name
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BayesDel_noAF
Benign
Cadd
Benign
Dann
Benign
Splicing
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SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at