rs121908276

Positions:

• chr11-2159883-G-C

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM1 PM2 PP5_Moderate

The NM_000207.3(INS):​c.302C>G​(p.Ser101Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Likely risk allele (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: INS NM_000207.3 missense
• Clinical Significance: Likely risk allele criteria provided, single submitter P:1 O:1
• Conservation: PhyloP100: 2.45

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:):

ACMG classification

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

• PM1: In a disulfide_bond Interchain (between B and A chains) (size 66) in uniprot entity INS_HUMAN there are 8 pathogenic changes around while only 1 benign (89%) in NM_000207.3
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 11-2159883-G-C is Pathogenic according to our data. Variant chr11-2159883-G-C is described in ClinVar as [Likely_risk_allele]. Clinvar id is 68731.Status of the report is criteria_provided_single_submitter, 1 stars. We mark this variant Likely_pathogenic, oryginal submissions are: {not_provided=1, Likely_risk_allele=1}.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
INS	NM_000207.3	c.302C>G	p.Ser101Cys	missense_variant	3/3	ENST00000381330.5	NP_000198.1
INS-IGF2	NR_003512.4	n.246+902C>G		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
INS	ENST00000381330.5	c.302C>G	p.Ser101Cys	missense_variant	3/3	1	NM_000207.3	ENSP00000370731	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 35

GnomAD4 genome Cov.: 33

ClinVar

Significance: Likely risk allele

Submissions summary: Pathogenic:1 Other:1

Revision: criteria provided, single submitter

Submissions by phenotype

Diabetes mellitus, permanent neonatal 4 Pathogenic:1

Likely risk allele, criteria provided, single submitter

research

Clinical Genomics, Uppaluri K&H Personalized Medicine Clinic

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Potent mutations in INS gene can cause early onset diabetes mellitus which is insulin dependent. It may have poor response to sulfonylureas, as mutations in this gene can cause beta cell destruction. However, more evidence is required to confer the association of this particular variant rs121908276 with permanent neonatal diabetes mellitus. -

Permanent neonatal diabetes mellitus Other:1

not provided, no classification provided

literature only

UniProtKB/Swiss-Prot

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.96
BayesDel_addAF	Pathogenic	0.42	D
BayesDel_noAF	Pathogenic	0.37
CADD	Pathogenic	30
DANN	Uncertain	0.99
DEOGEN2	Pathogenic	0.96	D;D;D;.
Eigen	Uncertain	0.63
Eigen_PC	Uncertain	0.49
FATHMM_MKL	Uncertain	0.94	D
LIST_S2	Benign	0.78	.;.;T;D
M_CAP	Pathogenic	0.71	D
MetaRNN	Uncertain	0.69	D;D;D;D
MetaSVM	Pathogenic	0.80	D
MutationAssessor	Pathogenic	3.5	M;M;M;.
MutationTaster	Benign	1.0	D;D;D;D;D;D
PROVEAN	Uncertain	-3.4	D;D;D;D
REVEL	Pathogenic	0.86
Sift	Uncertain	0.0010	D;D;D;D
Sift4G	Uncertain	0.0020	D;D;D;D
Polyphen		1.0	D;D;D;D
Vest4		0.75
MutPred		0.69		Loss of disorder (P = 0.0642);Loss of disorder (P = 0.0642);Loss of disorder (P = 0.0642);.;
MVP		0.89
MPC		1.1
ClinPred		0.99	D
GERP RS		3.6
Varity_R		0.95
gMVP		0.90

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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

Other links and lift over

dbSNP: rs121908276; hg19: chr11-2181113;