chrX-18564526-GA-ATATATATATATATATATATATATAT

Variant names:

• chrX-18564526-GA-ATATATATATATATATATATATATAT
• rs267608431
• NM_001323289.2:c.145+4_145+5delGAinsATATATATATATATATATATATATAT

Variant summary

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

The NM_001323289.2(CDKL5):​c.145+4_145+5delGAinsATATATATATATATATATATATATAT variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. It is difficult to determine the true allele frequency of this variant because it is of type INS_BIG, and the frequency of such variant types in population databases may be underestimated and unreliable. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 19)
• Consequence: CDKL5 NM_001323289.2 splice_region, intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.26
• Publications: 0 publications found

Genes affected

CDKL5 (HGNC:11411): (cyclin dependent kinase like 5) This gene is a member of Ser/Thr protein kinase family and encodes a phosphorylated protein with protein kinase activity. Mutations in this gene have been associated with X-linked infantile spasm syndrome (ISSX), also known as X-linked West syndrome, and Rett syndrome (RTT). Alternate transcriptional splice variants have been characterized. [provided by RefSeq, Jul 2008]

CDKL5 Gene-Disease associations (from GenCC):

• CDKL5 disorder

  Inheritance: XL Classification: DEFINITIVE Submitted by: ClinGen
• developmental and epileptic encephalopathy, 2

  Inheritance: XL Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, G2P, Labcorp Genetics (formerly Invitae), Ambry Genetics
• atypical Rett syndrome

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• genetic developmental and epileptic encephalopathy

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• infantile spasms

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• precocious puberty

  Inheritance: XL Classification: LIMITED Submitted by: Ambry Genetics

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001323289.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CDKL5	NM_001323289.2	MANE Select	c.145+4_145+5delGAinsATATATATATATATATATATATATAT		splice_region intron	N/A	NP_001310218.1
	CDKL5	NM_001037343.2		c.145+4_145+5delGAinsATATATATATATATATATATATATAT		splice_region intron	N/A	NP_001032420.1
	CDKL5	NM_003159.3		c.145+4_145+5delGAinsATATATATATATATATATATATATAT		splice_region intron	N/A	NP_003150.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CDKL5	ENST00000623535.2	TSL:1 MANE Select	c.145+4_145+5delGAinsATATATATATATATATATATATATAT		splice_region intron	N/A	ENSP00000485244.1
	CDKL5	ENST00000379989.6	TSL:1	c.145+4_145+5delGAinsATATATATATATATATATATATATAT		splice_region intron	N/A	ENSP00000369325.3
	CDKL5	ENST00000379996.7	TSL:1	c.145+4_145+5delGAinsATATATATATATATATATATATATAT		splice_region intron	N/A	ENSP00000369332.3

Frequencies

GnomAD3 genomes Cov.: 19

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome Cov.: 19

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		1.3

Splicing

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

Other links and lift over

dbSNP: rs267608431; hg19: chrX-18582646;