Variant summary

Our verdict is Benign. The variant received -21 ACMG points: 0P and 21B. BP4_StrongBP6_Very_StrongBP7BA1

The NM_001101426.4(CRPPA):c.726A>G(p.Gln242Gln) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00505 in 1,611,086 control chromosomes in the GnomAD database, including 305 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

Frequency

Genomes: 𝑓 0.027 ( 168 hom., cov: 33)

Exomes 𝑓: 0.0027 ( 137 hom. )

Consequence

CRPPA
NM_001101426.4 synonymous

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:7

Conservation

PhyloP100: -2.02

Publications

1 publications found

Variant links:

Genes affected

CRPPA (HGNC:37276): (CDP-L-ribitol pyrophosphorylase A) This gene encodes a 2-C-methyl-D-erythritol 4-phosphate cytidylyltransferase-like protein. Mutations in this gene are the cause of Walker-Warburg syndrome. Alternate splicing results in multiple transcript variants. [provided by RefSeq, May 2012]

CRPPA Gene-Disease associations (from GenCC):

muscular dystrophy-dystroglycanopathy (congenital with brain and eye anomalies), type A, 7
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: G2P, Genomics England PanelApp, Labcorp Genetics (formerly Invitae)
myopathy caused by variation in CRPPA
Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
autosomal recessive limb-girdle muscular dystrophy type 2U
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
congenital muscular dystrophy without intellectual disability
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
muscular dystrophy-dystroglycanopathy, type A
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

CRPPA links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -21 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.85).

BP6

Variant 7-16308586-T-C is Benign according to our data. Variant chr7-16308586-T-C is described in ClinVar as Benign. ClinVar VariationId is 129289.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=-2.02 with no splicing effect.

BA1

GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.091 is higher than 0.05.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001101426.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
CRPPA	NM_001101426.4	MANE Select	c.726A>G	p.Gln242Gln	synonymous	Exon 4 of 10	NP_001094896.1
CRPPA	NM_001101417.4		c.576A>G	p.Gln192Gln	synonymous	Exon 3 of 9	NP_001094887.1
CRPPA	NM_001368197.1		c.685-7120A>G		intron	N/A	NP_001355126.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
CRPPA	ENST00000407010.7	TSL:5 MANE Select	c.726A>G	p.Gln242Gln	synonymous	Exon 4 of 10	ENSP00000385478.2
CRPPA	ENST00000399310.3	TSL:1	c.576A>G	p.Gln192Gln	synonymous	Exon 3 of 9	ENSP00000382249.3
CRPPA	ENST00000676325.1		c.423A>G	p.Gln141Gln	synonymous	Exon 5 of 11	ENSP00000502074.1

Frequencies

GnomAD3 genomes

AF:

0.0270

AC:

4107

AN:

152124

Hom.:

165

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0931

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0110

Gnomad ASJ

AF:

0.00605

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000415

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000382

Gnomad OTH

AF:

0.0163

GnomAD2 exomes

AF:

0.00704

AC:

1729

AN:

245698

AF XY:

0.00529

show subpopulations

Gnomad AFR exome

AF:

0.0968

Gnomad AMR exome

AF:

0.00419

Gnomad ASJ exome

AF:

0.00492

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000197

Gnomad OTH exome

AF:

0.00484

GnomAD4 exome

AF:

0.00274

AC:

3996

AN:

1458844

Hom.:

137

Cov.:

AF XY:

0.00231

AC XY:

1679

AN XY:

725450

show subpopulations

African (AFR)

AF:

0.0945

AC:

3152

AN:

33356

American (AMR)

AF:

0.00503

AC:

224

AN:

44502

Ashkenazi Jewish (ASJ)

AF:

0.00437

AC:

114

AN:

26058

East Asian (EAS)

AF:

0.0000252

AC:

AN:

39664

South Asian (SAS)

AF:

0.000199

AC:

AN:

85430

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53328

Middle Eastern (MID)

AF:

0.00330

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

0.000116

AC:

129

AN:

1110458

Other (OTH)

AF:

0.00564

AC:

340

AN:

60282

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.437

Heterozygous variant carriers

166

332

498

664

830

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

102

204

306

408

510

<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:

0.0271

AC:

4133

AN:

152242

Hom.:

168

Cov.:

AF XY:

0.0268

AC XY:

1993

AN XY:

74432

show subpopulations

African (AFR)

AF:

0.0935

AC:

3881

AN:

41530

American (AMR)

AF:

0.0110

AC:

168

AN:

15290

Ashkenazi Jewish (ASJ)

AF:

0.00605

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5178

South Asian (SAS)

AF:

0.000623

AC:

AN:

4818

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10616

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000382

AC:

AN:

68022

Other (OTH)

AF:

0.0161

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.504

Heterozygous variant carriers

191

381

572

762

953

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

144

192

240

<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:

0.0132

Hom.:

Bravo

AF:

0.0311

Asia WGS

AF:

0.00549

AC:

AN:

3478

ClinVar

ClinVar submissions as Germline

Significance:Benign

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

not specified (5)

Congenital Muscular Dystrophy, alpha-dystroglycan related (1)

Muscular dystrophy-dystroglycanopathy (congenital with brain and eye anomalies), type A, 7;C5190987:Autosomal recessive limb-girdle muscular dystrophy type 2U (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.85

CADD

Benign

0.18

(source)

DANN

Benign

0.27

PhyloP100

-2.0

Mutation Taster

=100/0

polymorphism (auto)

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.060

Details are displayed if max score is > 0.2

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

Publications

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

ClinVar submissions as Germline

Computational scores

Splicing

Publications

Other links and lift over