chr20-18524980-C-T

Position:

chr20-18524980-C-T

Variant summary

Our verdict is Pathogenic. Variant got 16 ACMG points: 16P and 0B. PVS1PP5_Very_Strong

The NM_006363.6(SEC23B):c.649C>T(p.Arg217Ter) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000651 in 1,613,850 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 Likely pathogenic (★★). Variant results in nonsense mediated mRNA decay.

Frequency

Genomes: 𝑓 0.00011 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000060 ( 0 hom. )

Consequence

SEC23B
NM_006363.6 stop_gained

Scores

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:6

Conservation

PhyloP100: 1.17

Variant links:

Genes affected

SEC23B (HGNC:10702): (SEC23 homolog B, COPII coat complex component) The protein encoded by this gene is a member of the SEC23 subfamily of the SEC23/SEC24 family, which is involved in vesicle trafficking. The encoded protein has similarity to yeast Sec23p component of COPII. COPII is the coat protein complex responsible for vesicle budding from the ER. The function of this gene product has been implicated in cargo selection and concentration. Multiple alternatively spliced transcript variants have been identified in this gene. [provided by RefSeq, Feb 2010]

SEC23B links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 16 ACMG points.

PVS1

Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.

PP5

Variant 20-18524980-C-T is Pathogenic according to our data. Variant chr20-18524980-C-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 1227.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SEC23B	NM_006363.6 linkuse as main transcript	c.649C>T	p.Arg217Ter	stop_gained	6/20	ENST00000650089.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SEC23B	ENST00000650089.1 linkuse as main transcript	c.649C>T	p.Arg217Ter	stop_gained	6/20		NM_006363.6	P1

Frequencies

GnomAD3 genomes

AF:

0.000112

AC:

AN:

151964

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000725

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000655

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:

0.000191

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000517

AC:

AN:

251350

Hom.:

AF XY:

0.0000515

AC XY:

AN XY:

135836

show subpopulations

Gnomad AFR exome

AF:

0.0000615

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:

0.0000968

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.0000602

AC:

AN:

1461886

Hom.:

Cov.:

AF XY:

0.0000591

AC XY:

AN XY:

727240

show subpopulations

Gnomad4 AFR exome

AF:

0.0000597

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000737

Gnomad4 OTH exome

AF:

0.0000497

GnomAD4 genome

AF:

0.000112

AC:

AN:

151964

Hom.:

Cov.:

AF XY:

0.000135

AC XY:

AN XY:

74210

show subpopulations

Gnomad4 AFR

AF:

0.0000725

Gnomad4 AMR

AF:

0.0000655

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000191

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000136

Hom.:

Bravo

AF:

0.0000642

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000494

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.0000593

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:6

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Congenital dyserythropoietic anemia, type II;C4225179:Cowden syndrome 7

Pathogenic:2

Pathogenic, criteria provided, single submitter	clinical testing	Fulgent Genetics, Fulgent Genetics	Jul 23, 2021	- -
Pathogenic, criteria provided, single submitter	clinical testing	Invitae	Jan 05, 2024	This sequence change creates a premature translational stop signal (p.Arg217*) in the SEC23B gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in SEC23B are known to be pathogenic (PMID: 19561605, 25044164). This variant is present in population databases (rs121918226, gnomAD 0.01%). This premature translational stop signal has been observed in individual(s) with congenital dyserythropoietic anemia (PMID: 19561605). ClinVar contains an entry for this variant (Variation ID: 1227). For these reasons, this variant has been classified as Pathogenic. -

not provided

Pathogenic:2

Likely pathogenic, criteria provided, single submitter	clinical testing	Revvity Omics, Revvity	Jun 06, 2023	- -
Pathogenic, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Jan 30, 2014	- -

Congenital dyserythropoietic anemia, type II

Pathogenic:2

Pathogenic, no assertion criteria provided	literature only	OMIM	Sep 01, 2009	- -
Pathogenic, criteria provided, single submitter	clinical testing	MGZ Medical Genetics Center	Jun 13, 2022	- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Pathogenic

0.41

BayesDel_noAF

Pathogenic

0.28

CADD

Pathogenic

DANN

Uncertain

1.0

Eigen

Benign

0.11

Eigen_PC

Benign

-0.17

FATHMM_MKL

Benign

0.62

MutationTaster

Benign

1.0

A;A;A;A

Vest4

0.91

GERP RS

-0.96

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

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