chrX-13735091-C-T

Variant names:

• chrX-13735091-C-T
• NM_003611.3:c.12+8C>T

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Moderate BP6_Moderate

The NM_003611.3(OFD1):​c.12+8C>T variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 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 Likely benign (★).

• Frequency: Genomes: not found (cov: 24)
• Consequence: OFD1 NM_003611.3 splice_region, intron
• Scores: Splicing: ADA: 0.004191
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 1.06
• Publications: 0 publications found

Genes affected

OFD1 (HGNC:2567): (OFD1 centriole and centriolar satellite protein) This gene is located on the X chromosome and encodes a centrosomal protein. A knockout mouse model has been used to study the effect of mutations in this gene. The mouse gene is also located on the X chromosome, however, unlike the human gene it is not subject to X inactivation. Mutations in this gene are associated with oral-facial-digital syndrome type I and Simpson-Golabi-Behmel syndrome type 2. Many pseudogenes have been identified; a single pseudogene is found on chromosome 5 while as many as fifteen have been found on the Y chromosome. [provided by RefSeq, Aug 2016]

OFD1 Gene-Disease associations (from GenCC):

• Joubert syndrome 10

  Inheritance: XL Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P
• OFD1-related ciliopathy

  Inheritance: XL Classification: DEFINITIVE Submitted by: ClinGen
• orofaciodigital syndrome I

  Inheritance: XL Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, G2P, Labcorp Genetics (formerly Invitae)
• retinitis pigmentosa 23

  Inheritance: XL Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P
• primary ciliary dyskinesia

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• retinitis pigmentosa

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• orofaciodigital syndrome type 6

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• Simpson-Golabi-Behmel syndrome type 2

  Inheritance: XL Classification: LIMITED Submitted by: G2P

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.4).
• BP6: Variant X-13735091-C-T is Benign according to our data. Variant chrX-13735091-C-T is described in ClinVar as Likely_benign. ClinVar VariationId is 2092854.Status of the report is criteria_provided_single_submitter, 1 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_003611.3. 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
	OFD1	NM_003611.3	MANE Select	c.12+8C>T		splice_region intron	N/A	NP_003602.1	O75665-1
	OFD1	NM_001440947.1		c.12+8C>T		splice_region intron	N/A	NP_001427876.1
	OFD1	NM_001330209.2		c.12+8C>T		splice_region intron	N/A	NP_001317138.1	O75665-3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	OFD1	ENST00000340096.11	TSL:1 MANE Select	c.12+8C>T		splice_region intron	N/A	ENSP00000344314.6	O75665-1
	OFD1	ENST00000380550.6	TSL:1	c.12+8C>T		splice_region intron	N/A	ENSP00000369923.3	O75665-3
	OFD1	ENST00000922714.1		c.12+8C>T		splice_region intron	N/A	ENSP00000592773.1

Frequencies

GnomAD3 genomes Cov.: 24

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 24

ClinVar

ClinVar submissions

Significance: Likely benign

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	-	1	Joubert syndrome;C1510460:Orofaciodigital syndrome I (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.40
CADD	Benign	13
DANN	Benign	0.96
PhyloP100		1.1
PromoterAI		0.13	Neutral

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.0042
dbscSNV1_RF	Benign	0.092
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

hg19: chrX-13753210;