OFD1 p.Gly138Cys

Variant names:

• chrX-13739032-G-T
• NM_003611.3:c.412G>T
• OFD1 p.Gly138Cys

Your query was ambiguous. Multiple possible variants found:

• chrX-13739032-G-T
• chrX-13739032-GGT-TGC

Variant summary

Our verdict is Likely pathogenic. The variant received 6 ACMG points: 6P and 0B. PM2 PP3_Strong

The NM_003611.3(OFD1):​c.412G>T​(p.Gly138Cys) variant causes a missense, splice region change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. 3/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as (no stars).

• Frequency: Genomes: not found (cov: 22)
• Consequence: OFD1 NM_003611.3 missense, splice_region
• Scores: Splicing: ADA: 1.000
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 6.78
• 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: G2P, Labcorp Genetics (formerly Invitae)
• 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_pathogenic. The variant received 6 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: Splicing predictors support a deleterious effect. Scorers claiming Pathogenic: dbscSNV1_ADA, dbscSNV1_RF, max_spliceai. No scorers claiming Uncertain. No scorers claiming Benign.

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.412G>T	p.Gly138Cys	missense splice_region	Exon 5 of 23	NP_003602.1	O75665-1
	OFD1	NM_001440947.1		c.412G>T	p.Gly138Cys	missense splice_region	Exon 5 of 22	NP_001427876.1
	OFD1	NM_001330209.2		c.412G>T	p.Gly138Cys	missense splice_region	Exon 5 of 22	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.412G>T	p.Gly138Cys	missense splice_region	Exon 5 of 23	ENSP00000344314.6	O75665-1
	OFD1	ENST00000380550.6	TSL:1	c.412G>T	p.Gly138Cys	missense splice_region	Exon 5 of 22	ENSP00000369923.3	O75665-3
	OFD1	ENST00000922714.1		c.412G>T	p.Gly138Cys	missense splice_region	Exon 5 of 23	ENSP00000592773.1

Frequencies

GnomAD3 genomes Cov.: 22

GnomAD4 exome Cov.: 27

GnomAD4 genome Cov.: 22

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.61
BayesDel_addAF	Pathogenic	0.49	D
BayesDel_noAF	Pathogenic	0.47
CADD	Pathogenic	35
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.50	T
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Benign	0.81	T
M_CAP	Pathogenic	0.91	D
MetaRNN	Pathogenic	0.95	D
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Uncertain	2.9	M
PhyloP100		6.8
PrimateAI	Benign	0.47	T
PROVEAN	Pathogenic	-5.6	D
REVEL	Pathogenic	0.80
Sift	Uncertain	0.0040	D
Sift4G	Uncertain	0.0040	D
Varity_R		0.91
gMVP		0.66
Mutation Taster		=4/96	disease causing

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Pathogenic	1.0
dbscSNV1_RF	Pathogenic	1.0
SpliceAI score (max)		0.93		Details are displayed if max score is > 0.2
DS_DL_spliceai		0.93		Position offset: 0

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: chrX-13757151;