chr16-28911149-C-G

Position:

• chr16-28911149-C-G

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_024816.3(RABEP2):​c.925G>C​(p.Val309Leu) variant causes a missense 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. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. V309I) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: RABEP2 NM_024816.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -1.05

Genes affected

RABEP2 (HGNC:24817): (rabaptin, RAB GTPase binding effector protein 2) Predicted to enable GTPase activator activity and growth factor activity. Involved in regulation of cilium assembly. Located in cytosol; intracellular membrane-bounded organelle; and microtubule organizing center. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.038635463).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
RABEP2	NM_024816.3	c.925G>C	p.Val309Leu	missense_variant	6/13	ENST00000358201.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
RABEP2	ENST00000358201.9	c.925G>C	p.Val309Leu	missense_variant	6/13	1	NM_024816.3	P1
RABEP2	ENST00000357573.10	c.895-163G>C		intron_variant		1
RABEP2	ENST00000562590.5	n.1446G>C		non_coding_transcript_exon_variant	6/7	1
RABEP2	ENST00000544477.5	c.712G>C	p.Val238Leu	missense_variant	5/12	2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Apr 20, 2023

The c.925G>C (p.V309L) alteration is located in exon 6 (coding exon 6) of the RABEP2 gene. This alteration results from a G to C substitution at nucleotide position 925, causing the valine (V) at amino acid position 309 to be replaced by a leucine (L). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.076
BayesDel_addAF	Benign	-0.38	T
BayesDel_noAF	Benign	-0.78
CADD	Benign	0.011
DANN	Benign	0.90
DEOGEN2	Benign	0.057	T;.
Eigen	Benign	-1.3
Eigen_PC	Benign	-1.2
FATHMM_MKL	Benign	0.11	N
LIST_S2	Benign	0.68	T;T
M_CAP	Benign	0.0070	T
MetaRNN	Benign	0.039	T;T
MetaSVM	Benign	-0.98	T
MutationAssessor	Benign	0.090	N;.
MutationTaster	Benign	1.0	N;N;N
PrimateAI	Benign	0.27	T
PROVEAN	Benign	0.070	N;N
REVEL	Benign	0.016
Sift	Benign	0.40	T;T
Sift4G	Benign	0.56	T;T
Polyphen		0.0	B;B
Vest4		0.12
MutPred		0.22		Loss of methylation at K304 (P = 0.1357);.;
MVP		0.12
MPC		0.17
ClinPred		0.11	T
GERP RS		0.74
Varity_R		0.033
gMVP		0.14

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr16-28922470;