3-49027896-G-A

Variant names:

• chr3-49027896-G-A
• rs11557545
• NM_000884.3:c.345C>T
• IMPDH2 p.Ile115Ile

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_000884.3(IMPDH2):​c.345C>T​(p.Ile115Ile) variant causes a synonymous change. The variant was absent in control chromosomes in GnomAD project. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 32)
• Consequence: IMPDH2 NM_000884.3 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 4.13
• Publications: 0 publications found

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]

ENSG00000290315 (HGNC:):

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

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

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000884.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	IMPDH2	NM_000884.3	MANE Select	c.345C>T	p.Ile115Ile	synonymous	Exon 5 of 14	NP_000875.2	P12268
	IMPDH2	NM_001410759.1		c.345C>T	p.Ile115Ile	synonymous	Exon 5 of 15	NP_001397688.1	H0Y4R1
	IMPDH2	NM_001410760.1		c.270C>T	p.Ile90Ile	synonymous	Exon 4 of 14	NP_001397689.1	A0A7I2YQK5

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	IMPDH2	ENST00000326739.9	TSL:1 MANE Select	c.345C>T	p.Ile115Ile	synonymous	Exon 5 of 14	ENSP00000321584.4	P12268
	ENSG00000290315	ENST00000703936.1		c.2385C>T	p.Ile795Ile	synonymous	Exon 13 of 22	ENSP00000515567.1	A0A994J749
	IMPDH2	ENST00000937815.1		c.513C>T	p.Ile171Ile	synonymous	Exon 5 of 14	ENSP00000607874.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.30
CADD	Benign	17
DANN	Benign	0.86
PhyloP100		4.1

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.38		Details are displayed if max score is > 0.2
DS_AG_spliceai		0.38		Position offset: -5

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

dbSNP: rs11557545; hg19: chr3-49065329;