chr11-2159917-C-A

Variant names:

• chr11-2159917-C-A
• rs80356670
• NM_000207.3:c.268G>T

Variant summary

Our verdict is Likely pathogenic. The variant received 9 ACMG points: 9P and 0B. PM1 PM2 PP2 PP3_Strong

The NM_000207.3(INS):​c.268G>T​(p.Gly90Cys) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: INS NM_000207.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1 O:2
• Conservation: PhyloP100: 4.20
• Publications: 9 publications found

Genes affected

INS (HGNC:6081): (insulin) This gene encodes insulin, a peptide hormone that plays a vital role in the regulation of carbohydrate and lipid metabolism. After removal of the precursor signal peptide, proinsulin is post-translationally cleaved into three peptides: the B chain and A chain peptides, which are covalently linked via two disulfide bonds to form insulin, and C-peptide. Binding of insulin to the insulin receptor (INSR) stimulates glucose uptake. A multitude of mutant alleles with phenotypic effects have been identified, including insulin-dependent diabetes mellitus, permanent neonatal diabetes diabetes mellitus, maturity-onset diabetes of the young type 10 and hyperproinsulinemia. There is a read-through gene, INS-IGF2, which overlaps with this gene at the 5' region and with the IGF2 gene at the 3' region. [provided by RefSeq, May 2020]

INS-IGF2 (HGNC:33527): (INS-IGF2 readthrough) This locus includes two alternatively spliced read-through transcript variants which align to the INS gene in the 5' region and to the IGF2 gene in the 3' region. One transcript is predicted to encode a protein which shares the N-terminus with the INS protein but has a distinct and longer C-terminus, whereas the other transcript is a candidate for nonsense-mediated decay (NMD). The transcripts are imprinted and are paternally expressed in the limb and eye. [provided by RefSeq, Jul 2008]

ENSG00000295384 (HGNC:):

ACMG classification

Our verdict: Likely_pathogenic. The variant received 9 ACMG points.

• PM1: In a hotspot region, there are 12 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 6 uncertain in NM_000207.3
• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 17 curated pathogenic missense variants (we use a threshold of 10). The gene has 3 curated benign missense variants. Gene score misZ: 0.9004 (below the threshold of 3.09). Trascript score misZ: 0.85584 (below the threshold of 3.09). GenCC associations: The gene is linked to hyperproinsulinemia, diabetes mellitus, permanent neonatal 4, type 1 diabetes mellitus 2, maturity-onset diabetes of the young type 10, monogenic diabetes, transient neonatal diabetes mellitus, permanent neonatal diabetes mellitus, maturity-onset diabetes of the young.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.995

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000207.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	INS	NM_000207.3	MANE Select	c.268G>T	p.Gly90Cys	missense	Exon 3 of 3	NP_000198.1
	INS	NM_001185097.2		c.268G>T	p.Gly90Cys	missense	Exon 3 of 3	NP_001172026.1
	INS	NM_001185098.2		c.268G>T	p.Gly90Cys	missense	Exon 2 of 2	NP_001172027.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	INS	ENST00000381330.5	TSL:1 MANE Select	c.268G>T	p.Gly90Cys	missense	Exon 3 of 3	ENSP00000370731.5
	INS	ENST00000250971.7	TSL:1	c.268G>T	p.Gly90Cys	missense	Exon 3 of 3	ENSP00000250971.3
	INS	ENST00000397262.5	TSL:1	c.268G>T	p.Gly90Cys	missense	Exon 2 of 2	ENSP00000380432.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 35

GnomAD4 genome Cov.: 33

Alfa AF: 0.00 Hom.: 0

ClinVar

ClinVar submissions as Germline

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	Diabetes mellitus, permanent neonatal 4 (1)
-	-	-	Permanent neonatal diabetes mellitus (2)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Pathogenic	0.54	D
BayesDel_noAF	Pathogenic	0.53
CADD	Pathogenic	26
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.98	D
Eigen	Uncertain	0.64
Eigen_PC	Uncertain	0.43
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.94	D
M_CAP	Pathogenic	0.80	D
MetaRNN	Pathogenic	1.0	D
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Pathogenic	4.0	H
PhyloP100		4.2
PROVEAN	Pathogenic	-6.4	D
REVEL	Pathogenic	0.91
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0010	D
Polyphen		1.0	D
Vest4		0.90
MutPred		0.96		Loss of disorder (P = 0.0655)
MVP		0.97
MPC		1.2
ClinPred		1.0	D
GERP RS		3.7
Varity_R		0.91
gMVP		0.99
Mutation Taster		=4/96	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs80356670; hg19: chr11-2181147;