chr19-7122662-C-T

Variant names:

• chr19-7122662-C-T
• rs121913139
• NM_000208.4:c.3481G>A

Variant summary

Our verdict is Pathogenic. The variant received 10 ACMG points: 10P and 0B. PM1 PM2 PP2 PP3_Strong PP5

The NM_000208.4(INSR):​c.3481G>A​(p.Ala1161Thr) variant causes a missense change involving the alteration of a conserved nucleotide. 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 Pathogenic (no stars).

• Frequency: Genomes: not found (cov: 32)
• Consequence: INSR NM_000208.4 missense
• Clinical Significance: Pathogenic no assertion criteria provided P:2
• Conservation: PhyloP100: 7.48
• Publications: 10 publications found

Genes affected

INSR (HGNC:6091): (insulin receptor) This gene encodes a member of the receptor tyrosine kinase family of proteins. The encoded preproprotein is proteolytically processed to generate alpha and beta subunits that form a heterotetrameric receptor. Binding of insulin or other ligands to this receptor activates the insulin signaling pathway, which regulates glucose uptake and release, as well as the synthesis and storage of carbohydrates, lipids and protein. Mutations in this gene underlie the inherited severe insulin resistance syndromes including type A insulin resistance syndrome, Donohue syndrome and Rabson-Mendenhall syndrome. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Oct 2015]

INSR Gene-Disease associations (from GenCC):

• insulin-resistance syndrome type A

  Inheritance: AD, AR Classification: DEFINITIVE, STRONG, SUPPORTIVE, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Orphanet, Genomics England PanelApp, G2P
• Donohue syndrome

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae), Genomics England PanelApp, G2P
• hyperinsulinism due to INSR deficiency

  Inheritance: AD Classification: STRONG, MODERATE, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet, Genomics England PanelApp, Ambry Genetics
• Rabson-Mendenhall syndrome

  Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet, Genomics England PanelApp

ACMG classification

Our verdict: Pathogenic. The variant received 10 ACMG points.

• PM1: In a hotspot region, there are 5 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 3 uncertain in NM_000208.4
• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in the INSR gene, where missense mutations are typically associated with disease (based on misZ statistic). The gene has 29 curated pathogenic missense variants (we use a threshold of 10). The gene has 9 curated benign missense variants. Gene score misZ: 3.8314 (above the threshold of 3.09). Trascript score misZ: 5.4593 (above the threshold of 3.09). GenCC associations: The gene is linked to Rabson-Mendenhall syndrome, hyperinsulinism due to INSR deficiency, Donohue syndrome, insulin-resistance syndrome type A.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.992
• PP5: Variant 19-7122662-C-T is Pathogenic according to our data. Variant chr19-7122662-C-T is described in ClinVar as [Pathogenic]. Clinvar id is 14687.Status of the report is no_assertion_criteria_provided, 0 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
INSR	NM_000208.4	c.3481G>A	p.Ala1161Thr	missense_variant	Exon 19 of 22	ENST00000302850.10	NP_000199.2
INSR	NM_001079817.3	c.3445G>A	p.Ala1149Thr	missense_variant	Exon 18 of 21		NP_001073285.1
INSR	XM_011527988.3	c.3478G>A	p.Ala1160Thr	missense_variant	Exon 19 of 22		XP_011526290.2
INSR	XM_011527989.4	c.3442G>A	p.Ala1148Thr	missense_variant	Exon 18 of 21		XP_011526291.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
INSR	ENST00000302850.10	c.3481G>A	p.Ala1161Thr	missense_variant	Exon 19 of 22	1	NM_000208.4	ENSP00000303830.4
INSR	ENST00000341500.9	c.3445G>A	p.Ala1149Thr	missense_variant	Exon 18 of 21	1		ENSP00000342838.4
INSR	ENST00000593970.1	n.327G>A		non_coding_transcript_exon_variant	Exon 3 of 3	2
INSR	ENST00000601099.1	n.392G>A		non_coding_transcript_exon_variant	Exon 2 of 3	3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:2

Revision: no assertion criteria provided

Submissions by phenotype

Insulin-resistant diabetes mellitus AND acanthosis nigricans Pathogenic:1

Aug 01, 1990

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

- -

Insulin resistance Pathogenic:1

Aug 01, 1990

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.46	D
BayesDel_noAF	Pathogenic	0.42
CADD	Uncertain	26
DANN	Pathogenic	1.0
DEOGEN2	Pathogenic	0.92	.;D
Eigen	Pathogenic	0.75
Eigen_PC	Uncertain	0.66
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Pathogenic	0.99	D;D
M_CAP	Pathogenic	0.44	D
MetaRNN	Pathogenic	0.99	D;D
MetaSVM	Pathogenic	0.88	D
MutationAssessor	Uncertain	2.6	.;M
PhyloP100		7.5
PrimateAI	Pathogenic	0.90	D
PROVEAN	Uncertain	-3.5	D;D
REVEL	Pathogenic	0.88
Sift	Uncertain	0.0010	D;D
Sift4G	Pathogenic	0.0	D;D
Polyphen		1.0	D;D
Vest4		0.97
MutPred		0.97		.;Gain of sheet (P = 0.0827);
MVP		0.97
MPC		1.8
ClinPred		0.99	D
GERP RS		5.3
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.91
gMVP		0.91
Mutation Taster		=6/94	disease causing (ClinVar)

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

Other links and lift over

dbSNP: rs121913139; hg19: chr19-7122673;