rs28942110

Variant summary

Our verdict is Pathogenic. Variant got 10 ACMG points: 10P and 0B. PM1PM2PP3_StrongPP5_Moderate

The NM_016103.4(SAR1B):c.537T>A(p.Ser179Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000353 in 1,614,032 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 (★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000038 ( 0 hom. )

Consequence

SAR1B
NM_016103.4 missense

Scores

Clinical Significance

Likely pathogenic criteria provided, single submitter P:2O:1

Conservation

PhyloP100: 0.118

Variant links:

Genes affected

SAR1B (HGNC:10535): (secretion associated Ras related GTPase 1B) The protein encoded by this gene is a small GTPase that acts as a homodimer. The encoded protein is activated by the guanine nucleotide exchange factor PREB and is involved in protein transport from the endoplasmic reticulum to the Golgi. This protein is part of the COPII coat complex. Defects in this gene are a cause of chylomicron retention disease (CMRD), also known as Anderson disease (ANDD). Two transcript variants encoding the same protein have been found for this gene. [provided by RefSeq, Mar 2010]

SAR1B links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 10 ACMG points.

PM1

In a chain GTP-binding protein SAR1b (size 197) in uniprot entity SAR1B_HUMAN there are 15 pathogenic changes around while only 1 benign (94%) in NM_016103.4

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.981

PP5

Variant 5-134607010-A-T is Pathogenic according to our data. Variant chr5-134607010-A-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 2925.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
SAR1B	NM_016103.4 linkuse as main transcript	c.537T>A	p.Ser179Arg	missense_variant	7/7	ENST00000402673.7
SAR1B	NM_001033503.3 linkuse as main transcript	c.537T>A	p.Ser179Arg	missense_variant	8/8
SAR1B	XM_047417257.1 linkuse as main transcript	c.537T>A	p.Ser179Arg	missense_variant	7/7
SAR1B	XM_047417258.1 linkuse as main transcript	c.333T>A	p.Ser111Arg	missense_variant	5/5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SAR1B	ENST00000402673.7 linkuse as main transcript	c.537T>A	p.Ser179Arg	missense_variant	7/7	1	NM_016103.4	P1

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152212

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000199

AC:

AN:

251420

Hom.:

AF XY:

0.0000221

AC XY:

AN XY:

135868

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:

0.0000440

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000383

AC:

AN:

1461820

Hom.:

Cov.:

AF XY:

0.0000371

AC XY:

AN XY:

727218

show subpopulations

Gnomad4 AFR exome

AF:

0.00

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:

0.0000495

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152212

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74362

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.00000756

ExAC

AF:

0.0000165

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:2Other:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Chylomicron retention disease

Pathogenic:1Other:1

Pathogenic, no assertion criteria provided	literature only	OMIM	Jan 01, 2008	- -
not provided, no classification provided	literature only	GeneReviews	-	- -

SAR1B-related disorder

Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

Jul 24, 2023

The SAR1B c.537T>A variant is predicted to result in the amino acid substitution p.Ser179Arg. This variant was reported as pathogenic in patients with chylomicron retention disease (Jones et al. 2003. PubMed ID: 12692552; Charcosset et al. 2007. PubMed ID: 17945526). This variant is reported in 0.0044% of alleles in individuals of European (Non-Finnish) descent in gnomAD (http://gnomad.broadinstitute.org/variant/5-133942700-A-T). This variant is interpreted as likely pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

1.0

BayesDel_addAF

Pathogenic

0.34

BayesDel_noAF

Pathogenic

0.37

Cadd

Benign

Dann

Uncertain

1.0

DEOGEN2

Uncertain

0.61

D;.;.;D;.;T

Eigen

Uncertain

0.45

Eigen_PC

Uncertain

0.25

FATHMM_MKL

Uncertain

0.89

M_CAP

Pathogenic

0.41

MetaRNN

Pathogenic

0.98

D;D;D;D;D;D

MetaSVM

Pathogenic

0.98

MutationAssessor

Pathogenic

4.3

H;.;.;H;.;.

MutationTaster

Benign

1.0

A;A;A;A;A

PrimateAI

Pathogenic

0.82

PROVEAN

Uncertain

-4.3

D;D;D;D;D;D

REVEL

Pathogenic

0.89

Sift

Pathogenic

0.0

D;D;D;D;D;D

Sift4G

Pathogenic

0.0

D;D;D;D;D;.

Polyphen

1.0

D;.;.;D;.;.

Vest4

0.92

MutPred

0.95

Gain of MoRF binding (P = 0.0064);.;.;Gain of MoRF binding (P = 0.0064);.;.;

MVP

0.95

MPC

0.84

ClinPred

1.0

GERP RS

-2.0

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.96

gMVP

0.86

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