X-106033711-G-A

Position:

chrX-106033711-G-A

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 0P and 6B. BP4_StrongBP6BS2_Supporting

The NM_000354.6(SERPINA7):c.1045-8C>T variant causes a splice region, splice polypyrimidine tract, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000019 in 1,209,128 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 6 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Likely benign (no stars).

Frequency

Genomes: 𝑓 0.000036 ( 0 hom., 2 hem., cov: 23)

Exomes 𝑓: 0.000017 ( 0 hom. 4 hem. )

Consequence

SERPINA7
NM_000354.6 splice_region, splice_polypyrimidine_tract, intron

Scores

Splicing: ADA: 0.00008603

Clinical Significance

Likely benign no assertion criteria provided B:1

Conservation

PhyloP100: 0.831

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:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -6 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.83).

BP6

Variant X-106033711-G-A is Benign according to our data. Variant chrX-106033711-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 3043067.Status of the report is no_assertion_criteria_provided, 0 stars.

BS2

High Hemizygotes in GnomAd4 at 2 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
SERPINA7	NM_000354.6 linkuse as main transcript	c.1045-8C>T		splice_region_variant, splice_polypyrimidine_tract_variant, intron_variant		ENST00000372563.2
SERPINA7	XM_006724683.3 linkuse as main transcript	c.1067C>T	p.Pro356Leu	missense_variant	5/5
SERPINA7	XM_005262180.5 linkuse as main transcript	c.1098C>T	p.Pro366=	synonymous_variant	5/5

Ensembl

Gene	Transcript	HGVSc	Effect	#exon/exons	TSL	MANE	Appris
SERPINA7	ENST00000372563.2 linkuse as main transcript	c.1045-8C>T	splice_region_variant, splice_polypyrimidine_tract_variant, intron_variant		5	NM_000354.6	P1
SERPINA7	ENST00000327674.8 linkuse as main transcript	c.1045-8C>T	splice_region_variant, splice_polypyrimidine_tract_variant, intron_variant		1		P1
SERPINA7	ENST00000487487.1 linkuse as main transcript	n.371C>T	non_coding_transcript_exon_variant	3/3	3

Frequencies

GnomAD3 genomes

AF:

0.0000358

AC:

AN:

111706

Hom.:

Cov.:

AF XY:

0.0000590

AC XY:

AN XY:

33914

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000286

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:

0.000663

GnomAD3 exomes

AF:

0.0000273

AC:

AN:

182920

Hom.:

AF XY:

0.0000296

AC XY:

AN XY:

67542

show subpopulations

Gnomad AFR exome

AF:

0.0000761

Gnomad AMR exome

AF:

0.0000365

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:

0.0000368

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000173

AC:

AN:

1097422

Hom.:

Cov.:

AF XY:

0.0000110

AC XY:

AN XY:

362948

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000284

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.0000247

Gnomad4 NFE exome

AF:

0.0000202

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000358

AC:

AN:

111706

Hom.:

Cov.:

AF XY:

0.0000590

AC XY:

AN XY:

33914

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000286

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:

0.000663

Alfa

AF:

0.0000712

Hom.:

Bravo

AF:

0.0000151

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: no assertion criteria provided

LINK: link

Submissions by phenotype

SERPINA7-related disorder

Benign:1

Likely benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Jul 03, 2019

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.83

CADD

Benign

4.2

DANN

Benign

0.45

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.000086

dbscSNV1_RF

Benign

0.0020

SpliceAI score (max)

0.10

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