rs886062143

Variant names:

• chr7-16088408-C-T
• rs886062143
• NM_001101426.4:c.*3287G>A

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 0P and 4B. BP4_Strong

The NM_001101426.4(CRPPA):​c.*3287G>A variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.0000086 (0 hom., cov: 31)
  • Failed GnomAD Quality Control
• Consequence: CRPPA NM_001101426.4 3_prime_UTR
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.236
• Publications: 0 publications found

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

ACMG classification

Our verdict: Likely_benign. The variant received -4 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.5).

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

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CRPPA	NM_001101426.4	MANE Select	c.*3287G>A		3_prime_UTR	Exon 10 of 10	NP_001094896.1	A4D126-1
	CRPPA	NM_001368197.1		c.*3287G>A		3_prime_UTR	Exon 9 of 9	NP_001355126.1
	CRPPA	NM_001101417.4		c.*3287G>A		3_prime_UTR	Exon 9 of 9	NP_001094887.1	A0A140VJM1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CRPPA	ENST00000407010.7	TSL:5 MANE Select	c.*3287G>A		3_prime_UTR	Exon 10 of 10	ENSP00000385478.2	A4D126-1

Frequencies

GnomAD3 genomes AF: 0.00000865 AC: 1 AN: 115648 Hom.: 0 Cov.: 31

Gnomad AFR AF: 0.0000272

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

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: 0.00

GnomAD4 exome Cov.: 0

GnomAD4 genome Data not reliable, filtered out with message: AS_VQSR AF: 0.00000865 AC: 1 AN: 115648 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 54164

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.0000272 AC: 1 AN: 36706

American (AMR) AF: 0.00 AC: 0 AN: 8814

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 2952

East Asian (EAS) AF: 0.00 AC: 0 AN: 3882

South Asian (SAS) AF: 0.00 AC: 0 AN: 2816

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 4856

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 222

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 53248

Other (OTH) AF: 0.00 AC: 0 AN: 1398

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5. (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

Alfa AF: 0.0000843 Hom.: 0

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	Congenital Muscular Dystrophy, alpha-dystroglycan related (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.50
CADD	Benign	3.8
DANN	Benign	0.78
PhyloP100		0.24

Splicing

Name	Calibrated prediction	Score	Prediction
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

Other links and lift over

dbSNP: rs886062143; hg19: chr7-16128033;