chr10-27532452-T-G

Variant names:

• chr10-27532452-T-G
• rs3765133
• NM_021252.5:c.187-55T>G

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_021252.5(RAB18):​c.187-55T>G variant causes a 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. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 32)
• Consequence: RAB18 NM_021252.5 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.449
• Publications: 4 publications found

Genes affected

RAB18 (HGNC:14244): (RAB18, member RAS oncogene family) The protein encoded by this gene is a member of a family of Ras-related small GTPases that regulate membrane trafficking in organelles and transport vesicles. Knockdown studies is zebrafish suggest that this protein may have a role in eye and brain development. Mutations in this gene are associated with Warburg micro syndrome type 3. Alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Jan 2012]

RAB18 Gene-Disease associations (from GenCC):

• Warburg micro syndrome 3

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae)
• Warburg micro syndrome

  Inheritance: AR Classification: MODERATE, SUPPORTIVE Submitted by: ClinGen, Orphanet

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=-0.72).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_021252.5. 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
	RAB18	NM_021252.5	MANE Select	c.187-55T>G		intron	N/A	NP_067075.1
	RAB18	NM_001256410.2		c.274-55T>G		intron	N/A	NP_001243339.1
	RAB18	NM_001256411.2		c.187-55T>G		intron	N/A	NP_001243340.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	RAB18	ENST00000356940.11	TSL:1 MANE Select	c.187-55T>G		intron	N/A	ENSP00000349415.7
	RAB18	ENST00000621805.6	TSL:1	c.274-55T>G		intron	N/A	ENSP00000478479.1
	RAB18	ENST00000682138.1		n.5667T>G		non_coding_transcript_exon	Exon 2 of 3

Frequencies

GnomAD3 genomes Cov.: 32

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

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.72
CADD	Benign	14
DANN	Benign	0.84
PhyloP100		-0.45
PromoterAI		0.012	Neutral

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: rs3765133; hg19: chr10-27821381;