17-19343325-GG-CC

Variant names:

• chr17-19343325-GG-CC
• NM_015681.6:c.608_609delCCinsGG
• B9D1 p.Pro203Arg

Variant summary

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

The NM_015681.6(B9D1):​c.608_609delCCinsGG​(p.Pro203Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. It is difficult to determine the true allele frequency of this variant because it is of type MNV, 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. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P203L) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 33)
• Consequence: B9D1 NM_015681.6 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.27
• Publications: 0 publications found

Genes affected

B9D1 (HGNC:24123): (B9 domain containing 1) This gene encodes a B9 domain-containing protein, one of several that are involved in ciliogenesis. Alterations in expression of this gene have been found in a family with Meckel syndrome. Meckel syndrome has been associated with at least six different genes. This gene is located within the Smith-Magenis syndrome region on chromosome 17. [provided by RefSeq, Mar 2016]

B9D1 Gene-Disease associations (from GenCC):

• ciliopathy

  Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
• Joubert syndrome 27

  Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
• Meckel syndrome, type 9

  Inheritance: AR Classification: STRONG, MODERATE Submitted by: G2P, Genomics England PanelApp
• Joubert syndrome

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• Meckel syndrome

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

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

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_015681.6. 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
	B9D1	NM_015681.6	MANE Select	c.608_609delCCinsGG	p.Pro203Arg	missense	N/A	NP_056496.1	Q9UPM9-1
	B9D1	NM_001321214.2		c.*133_*134delCCinsGG		3_prime_UTR	Exon 7 of 7	NP_001308143.1	A8MYG7
	B9D1	NM_001321215.3		c.*384_*385delCCinsGG		3_prime_UTR	Exon 6 of 6	NP_001308144.1	A0A2R8Y646

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	B9D1	ENST00000261499.11	TSL:1 MANE Select	c.608_609delCCinsGG	p.Pro203Arg	missense	N/A	ENSP00000261499.4	Q9UPM9-1
	B9D1	ENST00000642870.2		c.248_249delCCinsGG	p.Pro83Arg	missense	N/A	ENSP00000496409.2	A0A2R8Y822
	B9D1	ENST00000663089.1		c.*384_*385delCCinsGG		3_prime_UTR	Exon 7 of 7	ENSP00000499469.1	A0A590UJK9

Frequencies

GnomAD3 genomes Cov.: 33

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

GnomAD4 genome Cov.: 33

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

hg19: chr17-19246638;