chr20-18543156-G-A

Position:

chr20-18543156-G-A

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_006363.6(SEC23B):c.1649G>A(p.Arg550Gln) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000803 in 1,614,134 control chromosomes in the GnomAD database, including 12 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0043 ( 8 hom., cov: 32)

Exomes 𝑓: 0.00044 ( 4 hom. )

Consequence

SEC23B
NM_006363.6 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:5

Conservation

PhyloP100: 9.97

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 Benign. Variant got -20 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.012790948).

BP6

Variant 20-18543156-G-A is Benign according to our data. Variant chr20-18543156-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 259966.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr20-18543156-G-A is described in Lovd as [Likely_benign].

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00432 (658/152262) while in subpopulation AFR AF= 0.0153 (635/41540). AF 95% confidence interval is 0.0143. There are 8 homozygotes in gnomad4. There are 302 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

BS2

High Homozygotes in GnomAd4 at 8 AD,AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SEC23B	NM_006363.6 linkuse as main transcript	c.1649G>A	p.Arg550Gln	missense_variant	14/20	ENST00000650089.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SEC23B	ENST00000650089.1 linkuse as main transcript	c.1649G>A	p.Arg550Gln	missense_variant	14/20		NM_006363.6	P1

Frequencies

GnomAD3 genomes

AF:

0.00434

AC:

660

AN:

152144

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0154

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00111

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:

0.0000441

Gnomad OTH

AF:

0.00143

GnomAD3 exomes

AF:

0.00102

AC:

256

AN:

251432

Hom.:

AF XY:

0.000809

AC XY:

110

AN XY:

135900

show subpopulations

Gnomad AFR exome

AF:

0.0147

Gnomad AMR exome

AF:

0.000347

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000653

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000176

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.000436

AC:

638

AN:

1461872

Hom.:

Cov.:

AF XY:

0.000392

AC XY:

285

AN XY:

727234

show subpopulations

Gnomad4 AFR exome

AF:

0.0155

Gnomad4 AMR exome

AF:

0.000492

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000812

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000270

Gnomad4 OTH exome

AF:

0.000944

GnomAD4 genome

AF:

0.00432

AC:

658

AN:

152262

Hom.:

Cov.:

AF XY:

0.00406

AC XY:

302

AN XY:

74456

show subpopulations

Gnomad4 AFR

AF:

0.0153

Gnomad4 AMR

AF:

0.00111

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000441

Gnomad4 OTH

AF:

0.00142

Alfa

AF:

0.00187

Hom.:

Bravo

AF:

0.00486

TwinsUK

AF:

0.00

AC:

ALSPAC

AF:

0.000259

AC:

ESP6500AA

AF:

0.0175

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.00137

AC:

166

Asia WGS

AF:

0.00173

AC:

AN:

3478

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:5

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:2

Likely benign, criteria provided, single submitter	clinical testing	Center for Pediatric Genomic Medicine, Children's Mercy Hospital and Clinics	Dec 13, 2016	- -
Likely benign, criteria provided, single submitter	clinical testing	ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories	Oct 27, 2023	- -

SEC23B-related disorder

Benign:1

Benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

May 24, 2023

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

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

Benign:1

Benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 31, 2024

- -

Congenital dyserythropoietic anemia, type II

Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 13, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.81

BayesDel_addAF

Benign

-0.16

BayesDel_noAF

Uncertain

0.020

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Benign

0.22

T;T;T;.;T;T;T

Eigen

Pathogenic

0.85

Eigen_PC

Pathogenic

0.79

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Pathogenic

0.99

.;.;.;D;.;D;D

MetaRNN

Benign

0.013

T;T;T;T;T;T;T

MetaSVM

Uncertain

0.41

MutationAssessor

Uncertain

2.9

M;M;M;.;M;M;.

MutationTaster

Benign

1.0

D;D;D;D

PrimateAI

Uncertain

0.78

PROVEAN

Uncertain

-3.8

D;D;D;.;.;D;D

REVEL

Pathogenic

0.80

Sift

Uncertain

0.0010

D;D;D;.;.;D;D

Sift4G

Uncertain

0.030

D;D;D;.;.;D;D

Polyphen

0.98

D;D;D;.;D;D;.

Vest4

0.84

MVP

0.98

MPC

0.56

ClinPred

0.090

GERP RS

4.4

Varity_R

0.70

gMVP

0.60

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.11

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