Variant chrX-106034380-C-T details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 5P and 1B. PVS1_StrongPP3BS2_Supporting

The NM_000354.6(SERPINA7):c.899G>A(p.Trp300Ter) variant causes a stop gained, splice region change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000128 in 1,089,990 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 5 hemizygotes in GnomAD. In-silico tool predicts a pathogenic outcome for this variant. 1/1 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as association (no stars).

Frequency

Genomes: not found (cov: 23)

Exomes 𝑓: 0.000013 ( 0 hom. 5 hem. )

Consequence

SERPINA7
NM_000354.6 stop_gained, splice_region

Scores

Clinical Significance

association no assertion criteria provided O:1

Conservation

PhyloP100: -1.39

Variant links:

Genes affected

SERPINA7 (HGNC:11583): (serpin family A member 7) There are three proteins including thyroxine-binding globulin (TBG), transthyretin and albumin responsible for carrying the thyroid hormones thyroxine (T4) and 3,5,3'-triiodothyronine (T3) in the bloodstream. This gene encodes the major thyroid hormone transport protein, TBG, in serum. It belongs to the serpin family in genomics, but the protein has no inhibitory function like many other members of the serpin family. Mutations in this gene result in TGB deficiency, which has been classified as partial deficiency, complete deficiency, and excess, based on the level of serum TBG. Alternatively spliced transcript variants encoding different isoforms have been found, but the full-length nature of these variants has not been determined.[provided by RefSeq, Jun 2012]

SERPINA7 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 4 ACMG points.

PVS1

Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant is located in the 3'-most 50 bp of the penultimate exon, not predicted to undergo nonsense mediated mRNA decay. Fraction of 0.28 CDS is truncated, and there are 0 pathogenic variants in the truncated region.

PP3

Splicing scoreres supports a deletorius effect: Scorers claiming Pathogenic: max_spliceai. No scorers claiming Uncertain. No scorers claiming Benign.

BS2

High Hemizygotes in GnomAdExome4 at 5 XL geneVariant has number of hemizygotes lower than other variant known as pathogenic in the gene, so the strength is limited to Supporting.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein
SERPINA7	NM_000354.6 linkuse as main transcript	c.899G>A	p.Trp300Ter	stop_gained, splice_region_variant	4/5	ENST00000372563.2	NP_000345.2
SERPINA7	XM_006724683.3 linkuse as main transcript	c.899G>A	p.Trp300Ter	stop_gained, splice_region_variant	4/5		XP_006724746.1
SERPINA7	XM_005262180.5 linkuse as main transcript	c.899G>A	p.Trp300Ter	stop_gained, splice_region_variant	4/5		XP_005262237.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris
SERPINA7	ENST00000372563.2 linkuse as main transcript	c.899G>A	p.Trp300Ter	stop_gained, splice_region_variant	4/5	5	NM_000354.6	ENSP00000361644	P1
SERPINA7	ENST00000327674.8 linkuse as main transcript	c.899G>A	p.Trp300Ter	stop_gained, splice_region_variant	3/4	1		ENSP00000329374	P1
SERPINA7	ENST00000487487.1 linkuse as main transcript	n.172G>A		splice_region_variant, non_coding_transcript_exon_variant	2/3	3

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000548

AC:

AN:

182470

Hom.:

AF XY:

0.00

AC XY:

AN XY:

67304

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000123

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000128

AC:

AN:

1089990

Hom.:

Cov.:

AF XY:

0.0000140

AC XY:

AN XY:

355994

show subpopulations

Gnomad4 AFR exome

AF:

0.0000381

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:

0.0000156

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: association

Submissions summary: Other:1

Revision: no assertion criteria provided

LINK: link

Submissions by phenotype

Thyroxine-binding globulin quantitative trait locus

Other:1

association, no assertion criteria provided

literature only

OMIM

Feb 01, 1998

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Pathogenic

0.49

BayesDel_noAF

Pathogenic

0.47

CADD

Pathogenic

DANN

Uncertain

1.0

FATHMM_MKL

Benign

0.21

MutationTaster

Benign

1.0

A;A

Vest4

0.83

GERP RS

3.4

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.69

Details are displayed if max score is > 0.2

DS_AG_spliceai

0.69

Position offset: -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