15-55203603-T-G

Variant names:

• chr15-55203603-T-G
• rs28620827
• NM_183235.3:c.*1904A>C

Variant summary

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

The NM_183235.3(RAB27A):​c.*1904A>C variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000684 in 146,250 control chromosomes in the GnomAD database, with no homozygous occurrence. 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 0.0000068 (0 hom., cov: 24)
• Consequence: RAB27A NM_183235.3 3_prime_UTR
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.301
• Publications: 0 publications found

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]

RAB27A Gene-Disease associations (from GenCC):

• Griscelli syndrome type 2

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), 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=-0.94).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_183235.3. 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
	RAB27A	NM_183235.3	MANE Select	c.*1904A>C		3_prime_UTR	Exon 7 of 7	NP_899058.1	P51159-1
	RAB27A	NM_001438970.1		c.*1904A>C		3_prime_UTR	Exon 8 of 8	NP_001425899.1
	RAB27A	NM_001438972.1		c.*1904A>C		3_prime_UTR	Exon 7 of 7	NP_001425901.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	RAB27A	ENST00000336787.6	TSL:1 MANE Select	c.*1904A>C		3_prime_UTR	Exon 7 of 7	ENSP00000337761.1	P51159-1
	RAB27A	ENST00000396307.6	TSL:1	c.*1904A>C		3_prime_UTR	Exon 6 of 6	ENSP00000379601.2	P51159-1
	RAB27A	ENST00000899597.1		c.*1904A>C		3_prime_UTR	Exon 7 of 7	ENSP00000569656.1

Frequencies

GnomAD3 genomes AF: 0.00000684 AC: 1 AN: 146250 Hom.: 0 Cov.: 24

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000679

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

GnomAD4 exome Cov.: 0

GnomAD4 genome AF: 0.00000684 AC: 1 AN: 146250 Hom.: 0 Cov.: 24 AF XY: 0.00 AC XY: 0 AN XY: 71108

African (AFR) AF: 0.00 AC: 0 AN: 39110

American (AMR) AF: 0.0000679 AC: 1 AN: 14718

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3428

East Asian (EAS) AF: 0.00 AC: 0 AN: 5062

South Asian (SAS) AF: 0.00 AC: 0 AN: 4624

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 9256

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 312

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 66834

Other (OTH) AF: 0.00 AC: 0 AN: 2010

Alfa AF: 0.00 Hom.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.94
CADD	Benign	1.9
DANN	Benign	0.27
PhyloP100		-0.30

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: rs28620827; hg19: chr15-55495801;