dbSNP rs72639213: IMPDH2:c.98+91T>G (chr3-49029162-A-C) – ACMG Classification: Benign (-12 pts)

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_StrongBS1BS2

The NM_000884.3(IMPDH2):c.98+91T>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00187 in 1,073,490 control chromosomes in the GnomAD database, including 25 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.0076 ( 11 hom., cov: 33)

Exomes 𝑓: 0.00092 ( 14 hom. )

Consequence

IMPDH2
NM_000884.3 intron

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -0.525

Variant links:

Genes affected

IMPDH2 (HGNC:6053): (inosine monophosphate dehydrogenase 2) This gene encodes the rate-limiting enzyme in the de novo guanine nucleotide biosynthesis. It is thus involved in maintaining cellular guanine deoxy- and ribonucleotide pools needed for DNA and RNA synthesis. The encoded protein catalyzes the NAD-dependent oxidation of inosine-5'-monophosphate into xanthine-5'-monophosphate, which is then converted into guanosine-5'-monophosphate. This gene is up-regulated in some neoplasms, suggesting it may play a role in malignant transformation. [provided by RefSeq, Jul 2008]

IMPDH2 links:

ENSG00000290315 (HGNC:):

ENSG00000290315 links:

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ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -12 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.9).

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00762 (1161/152284) while in subpopulation AFR AF= 0.0266 (1107/41556). AF 95% confidence interval is 0.0253. There are 11 homozygotes in gnomad4. There are 539 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.

BS2

High AC in GnomAd4 at 1161 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	Effect	Exon rank	MANE	Protein	UniProt
IMPDH2	NM_000884.3 link	c.98+91T>G	intron_variant	Intron 1 of 13	ENST00000326739.9	NP_000875.2	P12268A0A384N6C2
IMPDH2	NM_001410759.1 link	c.98+91T>G	intron_variant	Intron 1 of 14		NP_001397688.1
IMPDH2	NM_001410760.1 link	c.98+91T>G	intron_variant	Intron 1 of 13		NP_001397689.1
IMPDH2	NM_001410761.1 link	c.98+91T>G	intron_variant	Intron 1 of 12		NP_001397690.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
IMPDH2	ENST00000326739.9 link	c.98+91T>G		intron_variant	Intron 1 of 13	1	NM_000884.3	ENSP00000321584.4		P12268
ENSG00000290315	ENST00000703936.1 link	c.2139-356T>G		intron_variant	Intron 9 of 21			ENSP00000515567.1		A0A994J749

Frequencies

GnomAD3 genomes

AF:

0.00753

AC:

1146

AN:

152166

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0263

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00209

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00633

Gnomad NFE

AF:

0.000176

Gnomad OTH

AF:

0.00479

GnomAD3 exomes

AF:

0.00162

AC:

235

AN:

144696

Hom.:

AF XY:

0.00107

AC XY:

AN XY:

77214

show subpopulations

Gnomad AFR exome

AF:

0.0255

Gnomad AMR exome

AF:

0.00101

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000874

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000917

AC:

845

AN:

921206

Hom.:

Cov.:

AF XY:

0.000785

AC XY:

371

AN XY:

472588

show subpopulations

Gnomad4 AFR exome

AF:

0.0286

Gnomad4 AMR exome

AF:

0.00154

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000171

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000383

Gnomad4 OTH exome

AF:

0.00249

GnomAD4 genome

AF:

0.00762

AC:

1161

AN:

152284

Hom.:

Cov.:

AF XY:

0.00724

AC XY:

539

AN XY:

74474

show subpopulations

Gnomad4 AFR

AF:

0.0266

Gnomad4 AMR

AF:

0.00203

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000176

Gnomad4 OTH

AF:

0.00474

Alfa

AF:

0.00487

Hom.:

Bravo

AF:

0.00901

Asia WGS

AF:

0.00693

AC:

AN:

3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.90

CADD

Benign

1.1

DANN

Benign

0.53

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

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Computational scores

Splicing

Publications

LitVar

Other links and lift over