7-128405760-C-G

Variant names:

Variant summary

Our verdict is Benign. The variant received -14 ACMG points: 0P and 14B. BP4_StrongBP6_ModerateBS1BS2

The NM_000883.4(IMPDH1):c.353+7G>C variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000429 in 1,535,236 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Benign (★).

Frequency

Genomes: 𝑓 0.0024 ( 1 hom., cov: 32)

Exomes 𝑓: 0.00021 ( 1 hom. )

Consequence

IMPDH1
NM_000883.4 splice_region, intron

Scores

Splicing: ADA: 0.0004064

Clinical Significance

Benign criteria provided, single submitter B:1

Conservation

PhyloP100: -0.177

Publications

0 publications found

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 Gene-Disease associations (from GenCC):

inherited retinal dystrophy
Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
Leber congenital amaurosis 11
Inheritance: AD Classification: DEFINITIVE, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), G2P
retinitis pigmentosa 10
Inheritance: AD Classification: DEFINITIVE, STRONG, MODERATE Submitted by: Ambry Genetics, G2P, Labcorp Genetics (formerly Invitae)
Leber congenital amaurosis
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
retinitis pigmentosa
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

IMPDH1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -14 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.75).

BP6

Variant 7-128405760-C-G is Benign according to our data. Variant chr7-128405760-C-G is described in ClinVar as Benign. ClinVar VariationId is 772192.Status of the report is criteria_provided_single_submitter, 1 stars.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00243 (369/152122) while in subpopulation AFR AF = 0.00848 (352/41522). AF 95% confidence interval is 0.00775. There are 1 homozygotes in GnomAd4. There are 176 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High AC in GnomAd4 at 369 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
IMPDH1	NM_000883.4 link	c.353+7G>C		splice_region_variant, intron_variant	Intron 4 of 16	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.353+7G>C		splice_region_variant, intron_variant	Intron 4 of 16	2	NM_000883.4	ENSP00000345096.6		P20839-6

Frequencies

GnomAD3 genomes

AF:

0.00242

AC:

368

AN:

152014

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00848

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000916

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:

0.00

Gnomad OTH

AF:

0.00144

GnomAD2 exomes

AF:

0.000495

AC:

AN:

135238

AF XY:

0.000301

show subpopulations

Gnomad AFR exome

AF:

0.0104

Gnomad AMR exome

AF:

0.000428

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.000255

GnomAD4 exome

AF:

0.000209

AC:

289

AN:

1383114

Hom.:

Cov.:

AF XY:

0.000174

AC XY:

119

AN XY:

682536

show subpopulations

African (AFR)

AF:

0.00802

AC:

237

AN:

29548

American (AMR)

AF:

0.000515

AC:

AN:

34918

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

24674

East Asian (EAS)

AF:

0.00

AC:

AN:

34454

South Asian (SAS)

AF:

0.00

AC:

AN:

77836

European-Finnish (FIN)

AF:

0.00

AC:

AN:

46804

Middle Eastern (MID)

AF:

0.000498

AC:

AN:

4016

European-Non Finnish (NFE)

AF:

0.00000559

AC:

AN:

1073684

Other (OTH)

AF:

0.000455

AC:

AN:

57180

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.479

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00243

AC:

369

AN:

152122

Hom.:

Cov.:

AF XY:

0.00237

AC XY:

176

AN XY:

74386

show subpopulations

African (AFR)

AF:

0.00848

AC:

352

AN:

41522

American (AMR)

AF:

0.000915

AC:

AN:

15296

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5152

South Asian (SAS)

AF:

0.00

AC:

AN:

4826

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10576

Middle Eastern (MID)

AF:

0.00

AC:

AN:

292

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

67966

Other (OTH)

AF:

0.00142

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.506

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000135

Hom.:

Bravo

AF:

0.00273

Asia WGS

AF:

0.00174

AC:

AN:

3466

ClinVar

Significance: Benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not provided

Benign:1

Feb 03, 2025

Labcorp Genetics (formerly Invitae), Labcorp

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

-0.75

CADD

Benign

6.8

(source)

DANN

Benign

0.71

PhyloP100

-0.18

PromoterAI

0.061

Neutral

(source)

Mutation Taster

=100/0

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.00041

dbscSNV1_RF

Benign

0.0020

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over