dbSNP rs72624936: IMPDH1:c.-69T>G (chr7-128409970-A-C) – ACMG Classification: Benign (-20 pts)

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBA1

The NM_000883.4(IMPDH1):c.-69T>G variant causes a 5 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00278 in 1,270,174 control chromosomes in the GnomAD database, including 86 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

Frequency

Genomes: 𝑓 0.014 ( 49 hom., cov: 33)

Exomes 𝑓: 0.0013 ( 37 hom. )

Consequence

IMPDH1
NM_000883.4 5_prime_UTR

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:3

Conservation

PhyloP100: 0.0660

Variant links:

Genes affected

IMPDH1 (HGNC:6052): (inosine monophosphate dehydrogenase 1) The protein encoded by this gene acts as a homotetramer to regulate cell growth. The encoded protein is an enzyme that catalyzes the synthesis of xanthine monophosphate (XMP) from inosine-5'-monophosphate (IMP). This is the rate-limiting step in the de novo synthesis of guanine nucleotides. Defects in this gene are a cause of retinitis pigmentosa type 10 (RP10). Several transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Dec 2008]

IMPDH1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -20 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.83).

BP6

Variant 7-128409970-A-C is Benign according to our data. Variant chr7-128409970-A-C is described in ClinVar as [Benign]. Clinvar id is 358882.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BA1

GnomAdExome4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.0503 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
IMPDH1	NM_000883.4 link	c.-69T>G		5_prime_UTR_variant	Exon 1 of 17	ENST00000338791.11	NP_000874.2	P20839-6B3KRZ3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
IMPDH1	ENST00000338791.11 link	c.-69T>G		5_prime_UTR_variant	Exon 1 of 17	2	NM_000883.4	ENSP00000345096.6		P20839-6

Frequencies

GnomAD3 genomes

AF:

0.0140

AC:

2128

AN:

152064

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0495

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00353

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000103

Gnomad OTH

AF:

0.00718

GnomAD4 exome

AF:

0.00125

AC:

1401

AN:

1118002

Hom.:

Cov.:

AF XY:

0.00113

AC XY:

606

AN XY:

536236

show subpopulations

Gnomad4 AFR exome

AF:

0.0528

Gnomad4 AMR exome

AF:

0.00216

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.0000389

Gnomad4 NFE exome

AF:

0.0000685

Gnomad4 OTH exome

AF:

0.00286

GnomAD4 genome

AF:

0.0140

AC:

2133

AN:

152172

Hom.:

Cov.:

AF XY:

0.0133

AC XY:

993

AN XY:

74406

show subpopulations

Gnomad4 AFR

AF:

0.0495

Gnomad4 AMR

AF:

0.00353

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000103

Gnomad4 OTH

AF:

0.00710

Alfa

AF:

0.00971

Hom.:

Bravo

AF:

0.0160

ClinVar

Significance: Benign

Submissions summary: Benign:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Leber congenital amaurosis 11

Benign:1

Jan 12, 2018

Illumina Laboratory Services, Illumina

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

not provided

Benign:1

Breakthrough Genomics, Breakthrough Genomics

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: not provided

- -

Retinitis pigmentosa

Benign:1

Jan 12, 2018

Illumina Laboratory Services, Illumina

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.83

CADD

Benign

9.4

DANN

Benign

0.63

Splicing

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

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over