2-231123457-A-G
Variant summary
Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2PP3_Moderate
The NM_000867.5(HTR2B):c.308T>C(p.Val103Ala) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000753 in 1,461,756 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).
Frequency
Genomes: not found (cov: 32)
Exomes 𝑓: 0.0000075 ( 0 hom. )
Consequence
HTR2B
NM_000867.5 missense
NM_000867.5 missense
Scores
8
7
4
Clinical Significance
Conservation
PhyloP100: 9.31
Genes affected
HTR2B (HGNC:5294): (5-hydroxytryptamine receptor 2B) This gene encodes one of the several different receptors for 5-hydroxytryptamine (serotonin) that belongs to the G-protein coupled receptor 1 family. Serotonin is a biogenic hormone that functions as a neurotransmitter, a hormone, and a mitogen. Serotonin receptors mediate many of the central and peripheral physiologic functions of serotonin, including regulation of cardiovascular functions and impulsive behavior. Population and family-based analyses of a minor allele (glutamine-to-stop substitution, designated Q20*) which blocks expression of this protein, and knockout studies in mice, suggest a role for this gene in impulsivity. However, other factors, such as elevated testosterone levels, may also be involved. Alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Mar 2016]
PSMD1 (HGNC:9554): (proteasome 26S subunit, non-ATPase 1) The 26S proteasome is a multicatalytic proteinase complex with a highly ordered structure composed of 2 complexes, a 20S core and a 19S regulator. The 20S core is composed of 4 rings of 28 non-identical subunits; 2 rings are composed of 7 alpha subunits and 2 rings are composed of 7 beta subunits. The 19S regulator is composed of a base, which contains 6 ATPase subunits and 2 non-ATPase subunits, and a lid, which contains up to 10 non-ATPase subunits. Proteasomes are distributed throughout eukaryotic cells at a high concentration and cleave peptides in an ATP/ubiquitin-dependent process in a non-lysosomal pathway. An essential function of a modified proteasome, the immunoproteasome, is the processing of class I MHC peptides. This gene encodes the largest non-ATPase subunit of the 19S regulator lid, which is responsible for substrate recognition and binding. There is evidence that this proteasome and its subunits interact with viral proteins, including those of coronaviruses. Alternatively spliced transcript variants have been found for this gene.[provided by RefSeq, Aug 2020]
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ACMG classification
Classification made for transcript
Verdict is Uncertain_significance. Variant got 4 ACMG points.
PM2
?
Very rare variant in population databases, with high coverage;
PP3
?
MetaRNN computational evidence supports a deleterious effect, 0.858
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
HTR2B | NM_000867.5 | c.308T>C | p.Val103Ala | missense_variant | 2/4 | ENST00000258400.4 | |
PSMD1 | NM_002807.4 | c.1884-15279A>G | intron_variant | ENST00000308696.11 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
HTR2B | ENST00000258400.4 | c.308T>C | p.Val103Ala | missense_variant | 2/4 | 1 | NM_000867.5 | P1 | |
PSMD1 | ENST00000308696.11 | c.1884-15279A>G | intron_variant | 1 | NM_002807.4 | P1 |
Frequencies
GnomAD3 genomes ? Cov.: 32
GnomAD3 genomes
?
Cov.:
32
GnomAD3 exomes AF: 0.0000318 AC: 8AN: 251310Hom.: 0 AF XY: 0.0000368 AC XY: 5AN XY: 135812
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GnomAD4 exome AF: 0.00000753 AC: 11AN: 1461756Hom.: 0 Cov.: 32 AF XY: 0.00000825 AC XY: 6AN XY: 727174
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GnomAD4 genome ? Cov.: 32
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32
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ExAC
?
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3
ClinVar
Significance: Uncertain significance
Submissions summary: Uncertain:1
Revision: criteria provided, single submitter
LINK: link
Submissions by phenotype
not specified Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Ambry Genetics | May 26, 2022 | The c.308T>C (p.V103A) alteration is located in exon 2 (coding exon 1) of the HTR2B gene. This alteration results from a T to C substitution at nucleotide position 308, causing the valine (V) at amino acid position 103 to be replaced by an alanine (A). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Pathogenic
BayesDel_addAF
Pathogenic
D
BayesDel_noAF
Pathogenic
Cadd
Pathogenic
Dann
Uncertain
DEOGEN2
Benign
T
Eigen
Pathogenic
Eigen_PC
Pathogenic
FATHMM_MKL
Pathogenic
D
LIST_S2
Uncertain
D
M_CAP
Benign
D
MetaRNN
Pathogenic
D
MetaSVM
Benign
T
MutationAssessor
Pathogenic
H
MutationTaster
Benign
D;D;D;D
PrimateAI
Uncertain
T
PROVEAN
Uncertain
D
REVEL
Uncertain
Sift
Uncertain
D
Sift4G
Uncertain
D
Polyphen
D
Vest4
MutPred
Loss of stability (P = 0.1035);
MVP
MPC
ClinPred
D
GERP RS
Varity_R
gMVP
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