rs16976228

chr15-55250935-T-C

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_183235.3(RAB27A):c.-22-15979A>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0663 in 152,086 control chromosomes in the GnomAD database, including 1,122 homozygotes. 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: 𝑓 0.066 (1122 hom., cov: 32)
• Consequence: RAB27A NM_183235.3 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -1.80

Genes affected

RAB27A (HGNC:9766): (RAB27A, member RAS oncogene family) The protein encoded by this gene belongs to the small GTPase superfamily, Rab family. The protein is membrane-bound and may be involved in protein transport and small GTPase mediated signal transduction. Mutations in this gene are associated with Griscelli syndrome type 2. Alternative splicing occurs at this locus and four transcript variants encoding the same protein have been identified. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.85).
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.226 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
RAB27A	NM_183235.3	c.-22-15979A>G		intron_variant		ENST00000336787.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
RAB27A	ENST00000336787.6	c.-22-15979A>G		intron_variant		1	NM_183235.3	P1

Frequencies

GnomAD3 genomes AF: 0.0661 AC: 10052 AN: 151968 Hom.: 1116 Cov.: 32

Gnomad AFR AF: 0.230

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0248

Gnomad ASJ AF: 0.000288

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000622

Gnomad FIN AF: 0.000284

Gnomad MID AF: 0.0411

Gnomad NFE AF: 0.00107

Gnomad OTH AF: 0.0454

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

GnomAD4 genome AF: 0.0663 AC: 10083 AN: 152086 Hom.: 1122 Cov.: 32 AF XY: 0.0632 AC XY: 4696 AN XY: 74342

Gnomad4 AFR AF: 0.230

Gnomad4 AMR AF: 0.0248

Gnomad4 ASJ AF: 0.000288

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000623

Gnomad4 FIN AF: 0.000284

Gnomad4 NFE AF: 0.00107

Gnomad4 OTH AF: 0.0449

Alfa AF: 0.0155 Hom.: 185

Bravo AF: 0.0754

Asia WGS AF: 0.0190 AC: 66 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.85
Cadd	Benign	0.79
Dann	Benign	0.77

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

Publications

LitVar

Other links and lift over

dbSNP: rs16976228; hg19: chr15-55543133;