rs1801278

chr2-226795828-C-Achr2-226795828-C-Gchr2-226795828-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_005544.3(IRS1):c.2911G>T(p.Gly971Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000657 in 152,208 control chromosomes in the GnomAD database, with no homozygous occurrence. 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. G971R) has been classified as Uncertain significance.

• Frequency: Genomes: 𝑓 0.0000066 (0 hom., cov: 33)
• Consequence: IRS1 NM_005544.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.972

Genes affected

IRS1 (HGNC:6125): (insulin receptor substrate 1) This gene encodes a protein which is phosphorylated by insulin receptor tyrosine kinase. Mutations in this gene are associated with type II diabetes and susceptibility to insulin resistance. [provided by RefSeq, Nov 2009]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
IRS1	NM_005544.3	c.2911G>T	p.Gly971Trp	missense_variant	1/2	ENST00000305123.6
IRS1	XM_047444223.1	c.2911G>T	p.Gly971Trp	missense_variant	1/2
IRS1	XM_047444224.1	c.2911G>T	p.Gly971Trp	missense_variant	1/2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
IRS1	ENST00000305123.6	c.2911G>T	p.Gly971Trp	missense_variant	1/2	1	NM_005544.3	P1

Frequencies

GnomAD3 genomes AF: 0.00000657 AC: 1 AN: 152208 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000207

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

GnomAD4 exome Cov.: 44

GnomAD4 genome AF: 0.00000657 AC: 1 AN: 152208 Hom.: 0 Cov.: 33 AF XY: 0.0000134 AC XY: 1 AN XY: 74360

Gnomad4 AFR AF: 0.00

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000207

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.00

Gnomad4 OTH AF: 0.00

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.19
BayesDel_addAF	Uncertain	0.054	T
BayesDel_noAF	Benign	-0.16
Cadd	Benign	21
Dann	Uncertain	0.99
DEOGEN2	Uncertain	0.52	D
Eigen	Uncertain	0.19
Eigen_PC	Benign	0.17
FATHMM_MKL	Benign	0.26	N
LIST_S2	Benign	0.76	T
M_CAP	Benign	0.031	D
MetaRNN	Uncertain	0.66	D
MetaSVM	Benign	-0.84	T
MutationAssessor	Benign	0.69	N
MutationTaster	Benign	1.0	N
PrimateAI	Uncertain	0.49	T
PROVEAN	Benign	-0.76	N
REVEL	Benign	0.18
Sift	Uncertain	0.022	D
Sift4G	Uncertain	0.0060	D
Polyphen		1.0	D
Vest4		0.58
MutPred		0.28		Gain of MoRF binding (P = 0.0316);
MVP		0.87
MPC		1.0
ClinPred		0.82	D
GERP RS		5.4
Varity_R		0.13
gMVP		0.40

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

Other links and lift over

dbSNP: rs1801278; hg19: chr2-227660544;