7-155298386-T-C

Position:

chr7-155298386-T-C

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_005542.6(INSIG1):c.101T>C(p.Val34Ala) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000192 in 1,562,814 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. V34I) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

INSIG1
NM_005542.6 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.722

Variant links:

Genes affected

INSIG1 (HGNC:6083): (insulin induced gene 1) This gene encodes an endoplasmic reticulum membrane protein that regulates cholesterol metabolism, lipogenesis, and glucose homeostasis. The encoded protein has six transmembrane helices which contain an effector protein binding site. It binds the sterol-sensing domains of sterol regulatory element-binding protein (SREBP) cleavage-activating protein (SCAP) and 3-hydroxy-3-methylglutaryl-coenzyme A reductase (HMG-CoA reductase), and is essential for the sterol-mediated trafficking of these two proteins. It promotes the endoplasmic reticulum retention of SCAP and the ubiquitin-mediated degradation of HMG-CoA reductase. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Oct 2016]

INSIG1 links:

INSIG1-DT (HGNC:):

INSIG1-DT links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.057855338).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
INSIG1	NM_005542.6 linkuse as main transcript	c.101T>C	p.Val34Ala	missense_variant	2/6	ENST00000340368.9
INSIG1-DT	NR_183448.1 linkuse as main transcript	n.595A>G		non_coding_transcript_exon_variant	1/2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
INSIG1	ENST00000340368.9 linkuse as main transcript	c.101T>C	p.Val34Ala	missense_variant	2/6	1	NM_005542.6	P1	O15503-1
INSIG1	ENST00000342407.5 linkuse as main transcript	c.101T>C	p.Val34Ala	missense_variant	2/4	2			O15503-2
INSIG1	ENST00000425172.1 linkuse as main transcript	c.101T>C	p.Val34Ala	missense_variant	2/2	2
INSIG1	ENST00000344756.8 linkuse as main transcript	c.81+20T>C		intron_variant		5

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152094

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:

0.000193

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00000142

AC:

AN:

1410720

Hom.:

Cov.:

AF XY:

0.00000143

AC XY:

AN XY:

697876

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:

9.19e-7

Gnomad4 OTH exome

AF:

0.0000172

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152094

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74304

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000193

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000113

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jan 03, 2024

The c.101T>C (p.V34A) alteration is located in exon 2 (coding exon 1) of the INSIG1 gene. This alteration results from a T to C substitution at nucleotide position 101, causing the valine (V) at amino acid position 34 to be replaced by an alanine (A). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.080

BayesDel_addAF

Benign

-0.17

BayesDel_noAF

Benign

-0.49

CADD

Benign

DANN

Benign

0.44

DEOGEN2

Benign

0.087

T;.;.

Eigen

Benign

-1.1

Eigen_PC

Benign

-1.1

FATHMM_MKL

Benign

0.24

LIST_S2

Benign

0.54

T;T;T

M_CAP

Benign

0.0074

MetaRNN

Benign

0.058

T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.76

N;.;N

MutationTaster

Benign

1.0

D;N;N

PrimateAI

Uncertain

0.76

PROVEAN

Benign

-0.11

N;N;N

REVEL

Benign

0.067

Sift

Benign

0.79

T;T;T

Sift4G

Benign

0.64

T;T;T

Polyphen

0.0

B;.;.

Vest4

0.046

MutPred

0.21

Loss of methylation at K33 (P = 0.0419);Loss of methylation at K33 (P = 0.0419);Loss of methylation at K33 (P = 0.0419);

MVP

0.33

MPC

1.0

ClinPred

0.061

GERP RS

-2.4

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.3

Varity_R

0.068

gMVP

0.41

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