chr11-2159893-T-C

Position:

• chr11-2159893-T-C

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 6P and 2B. PM1 PM2 PM5 BP4_Moderate

The NM_000207.3(INS):​c.292A>G​(p.Ser98Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000686 in 1,457,148 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/20 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. S98C) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: INS NM_000207.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.791

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 Uncertain_significance. Variant got 4 ACMG points.

• PM1: In a hotspot region, there are 6 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 7 uncertain in NM_000207.3
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr11-2159892-C-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 1526009.Status of the report is criteria_provided_single_submitter, 1 stars.
• BP4: Computational evidence support a benign effect (MetaRNN=0.14605677).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
INS	NM_000207.3	c.292A>G	p.Ser98Gly	missense_variant	3/3	ENST00000381330.5
INS-IGF2	NR_003512.4	n.246+892A>G		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
INS	ENST00000381330.5	c.292A>G	p.Ser98Gly	missense_variant	3/3	1	NM_000207.3	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 6.86e-7 AC: 1 AN: 1457148 Hom.: 0 Cov.: 35 AF XY: 0.00 AC XY: 0 AN XY: 724458

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: 9.00e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.071
BayesDel_addAF	Uncertain	0.027	T
BayesDel_noAF	Benign	-0.20
CADD	Benign	15
DANN	Benign	0.83
DEOGEN2	Uncertain	0.56	D;D;D;.
Eigen	Benign	-0.70
Eigen_PC	Benign	-0.61
FATHMM_MKL	Uncertain	0.79	D
LIST_S2	Benign	0.73	.;.;T;T
M_CAP	Uncertain	0.22	D
MetaRNN	Benign	0.15	T;T;T;T
MetaSVM	Benign	-0.64	T
MutationAssessor	Benign	0.79	N;N;N;.
MutationTaster	Benign	1.0	D;D;N;N;N;N
PROVEAN	Benign	-1.2	N;N;N;N
REVEL	Benign	0.24
Sift	Benign	0.54	T;T;T;T
Sift4G	Benign	0.38	T;T;T;T
Polyphen		0.0050	B;B;B;B
Vest4		0.11
MutPred		0.39		Loss of catalytic residue at S98 (P = 0.1298);Loss of catalytic residue at S98 (P = 0.1298);Loss of catalytic residue at S98 (P = 0.1298);.;
MVP		0.84
MPC		0.34
ClinPred		0.062	T
GERP RS		-0.17
Varity_R		0.57
gMVP		0.62

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: rs1252051752; hg19: chr11-2181123;