rs141620200
Variant summary
Our verdict is Benign. Variant got -9 ACMG points: 0P and 9B. BP4_StrongBP6BS2
The NM_000295.5(SERPINA1):c.922G>T(p.Ala308Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0032 in 1,613,904 control chromosomes in the GnomAD database, including 14 homozygotes. In-silico tool predicts a benign outcome for this variant. 14/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A308T) has been classified as Benign.
Frequency
Consequence
NM_000295.5 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Benign. Variant got -9 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
SERPINA1 | NM_000295.5 | c.922G>T | p.Ala308Ser | missense_variant | 4/5 | ENST00000393087.9 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
SERPINA1 | ENST00000393087.9 | c.922G>T | p.Ala308Ser | missense_variant | 4/5 | 1 | NM_000295.5 | P1 |
Frequencies
GnomAD3 genomes ? AF: 0.00212 AC: 322AN: 151916Hom.: 3 Cov.: 34
GnomAD3 exomes AF: 0.00201 AC: 506AN: 251208Hom.: 1 AF XY: 0.00199 AC XY: 270AN XY: 135784
GnomAD4 exome AF: 0.00331 AC: 4840AN: 1461870Hom.: 11 Cov.: 31 AF XY: 0.00322 AC XY: 2343AN XY: 727240
GnomAD4 genome ? AF: 0.00212 AC: 322AN: 152034Hom.: 3 Cov.: 34 AF XY: 0.00214 AC XY: 159AN XY: 74356
ClinVar
Submissions by phenotype
Alpha-1-antitrypsin deficiency Uncertain:1Benign:1
Uncertain significance, criteria provided, single submitter | clinical testing | Illumina Laboratory Services, Illumina | Apr 27, 2017 | This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases did not allow this variant to be ruled in or out of causing disease. Therefore, this variant is classified as a variant of unknown significance. - |
Likely benign, criteria provided, single submitter | clinical testing | Invitae | Jan 31, 2024 | - - |
not provided Uncertain:1Benign:1
Likely benign, criteria provided, single submitter | clinical testing | CeGaT Center for Human Genetics Tuebingen | Jun 01, 2023 | SERPINA1: BS2 - |
Uncertain significance, criteria provided, single submitter | clinical testing | GeneDx | May 02, 2023 | Identified in large case control studies in several individuals with lung disease who also harbored the Z variant, but it is not known whether the variants occurred on the same (in cis) or on different (in trans) chromosomes, and at least one of the individuals had normal serum concentrations of AAT (Foil et al., 2019; Ortega et al., 2020); Reported in an individual with features of alpha-1-antitrypsin deficiency who was also homozygous for the Z allele, which explained the phenotype (Bengston et al., 2016); Reported in one individual with chronic respiratory disorder in whom no second SERPINA1 variant was identified (Duk et al., 2016); In a large study evaluating the rates of venous thromboembolism (VTE), the allele frequency of this variant was found to be 0.4% higher in individuals who had experienced VTE; the variant was seen in the homozygous state in at least one individual with VTE and in the compound heterozygous state in individuals with and without VTE, but detailed clinical information, including AAT serum levels, was not provided (Manderstedt et al., 2022); In silico analysis supports that this missense variant does not alter protein structure/function; This variant is associated with the following publications: (PMID: 30223862, 25010111, 32810967, 30254761, 31661293, 26987331, 35263815) - |
not specified Benign:2
Likely benign, criteria provided, single submitter | clinical testing | Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine | Feb 21, 2013 | Ala308Ser in exon 6 of SERPINA1: This variant is not expected to have clinical s ignificance because it has been identified in 0.4% (33/8600) of European America n chromosomes from a broad population by the NHLBI Exome Sequencing Project (htt p://evs.gs.washington.edu/EVS; dbSNP rs141620200). - |
Benign, criteria provided, single submitter | clinical testing | Eurofins Ntd Llc (ga) | Jun 02, 2016 | - - |
SERPINA1-related condition Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | PreventionGenetics, part of Exact Sciences | Jun 02, 2023 | The SERPINA1 c.922G>T variant is predicted to result in the amino acid substitution p.Ala308Ser. This variant has been reported as a variant of uncertain significance in trans with the common SERPINA1 Z allele as well as the F allele in patients with chronic obstructive pulmonary disease (COPD) (Foil et al. 2018. PubMed ID: 30254761; Ortega et al. 2020. PubMed ID: 31661293). This variant is reported in 0.39% of alleles in individuals of European (Non-Finnish) descent in gnomAD, including one homozygous individual (http://gnomad.broadinstitute.org/variant/14-94845944-C-A). Although we suspect that this variant may be benign, at this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. - |
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at