chr12-112828352-C-G

Position:

• chr12-112828352-C-G

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_001143854.2(RPH3A):​c.34C>G​(p.Arg12Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000646 in 1,609,138 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts 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. R12L) has been classified as Uncertain significance.

• Frequency:
  • Genomes: 𝑓 0.000033 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000068 (0 hom.)
• Consequence: RPH3A NM_001143854.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.55

Genes affected

RPH3A (HGNC:17056): (rabphilin 3A) The protein encoded by this gene is thought to be an effector for RAB3A, which is a small G protein that acts in the late stages of neurotransmitter exocytosis. The encoded protein may be involved in neurotransmitter release and synaptic vesicle traffic. [provided by RefSeq, Dec 2016]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.3138423).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
RPH3A	NM_001143854.2	c.34C>G	p.Arg12Gly	missense_variant	3/22	ENST00000389385.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
RPH3A	ENST00000389385.9	c.34C>G	p.Arg12Gly	missense_variant	3/22	1	NM_001143854.2	P3

Frequencies

GnomAD3 genomes AF: 0.0000329 AC: 5 AN: 152120 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00103

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.000122 AC: 30 AN: 246468 Hom.: 0 AF XY: 0.000172 AC XY: 23 AN XY: 133408

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00101

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000680 AC: 99 AN: 1456900 Hom.: 0 Cov.: 30 AF XY: 0.000112 AC XY: 81 AN XY: 724616

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00113

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.0000498

GnomAD4 genome AF: 0.0000328 AC: 5 AN: 152238 Hom.: 0 Cov.: 32 AF XY: 0.0000269 AC XY: 2 AN XY: 74446

Gnomad4 AFR AF: 0.00

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00104

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.00

Gnomad4 OTH AF: 0.00

Bravo AF: 0.00000756

ExAC AF: 0.000115 AC: 14

Asia WGS AF: 0.000289 AC: 1 AN: 3478

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Inborn genetic diseases Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Apr 08, 2024

The c.34C>G (p.R12G) alteration is located in exon 3 (coding exon 1) of the RPH3A gene. This alteration results from a C to G substitution at nucleotide position 34, causing the arginine (R) at amino acid position 12 to be replaced by a glycine (G). 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	0.12
BayesDel_addAF	Uncertain	0.054	T
BayesDel_noAF	Pathogenic	0.25
CADD	Uncertain	24
DANN	Uncertain	1.0
DEOGEN2	Benign	0.064	.;T;T;T;T;.;T;T;.;T;T;T;T;T;.;T;.;T
Eigen	Uncertain	0.56
Eigen_PC	Uncertain	0.51
FATHMM_MKL	Uncertain	0.86	D
LIST_S2	Uncertain	0.92	D;D;D;D;D;.;.;D;D;D;D;D;.;D;D;.;D;D
M_CAP	Benign	0.045	D
MetaRNN	Benign	0.23	T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T
MetaSVM	Uncertain	0.088	D
MutationAssessor	Uncertain	2.2	.;.;.;M;.;.;.;.;.;.;.;.;M;.;M;M;.;.
MutationTaster	Benign	1.0	D;D;D;D;D;D;D
PrimateAI	Uncertain	0.51	T
PROVEAN	Pathogenic	-5.8	D;D;D;N;D;D;D;D;D;D;D;D;N;D;N;N;D;N
REVEL	Uncertain	0.51
Sift	Pathogenic	0.0	D;D;D;D;D;.;D;D;D;D;D;D;D;D;D;D;D;D
Sift4G	Pathogenic	0.0	D;D;D;T;T;.;D;D;D;T;D;D;T;D;T;T;D;D
Polyphen		1.0, 1.0	.;.;.;D;.;.;.;.;.;.;.;.;D;.;D;D;.;D
Vest4		0.82, 0.82, 0.82, 0.73
MutPred		0.62		Gain of catalytic residue at P16 (P = 0.0055);Gain of catalytic residue at P16 (P = 0.0055);Gain of catalytic residue at P16 (P = 0.0055);Gain of catalytic residue at P16 (P = 0.0055);Gain of catalytic residue at P16 (P = 0.0055);Gain of catalytic residue at P16 (P = 0.0055);Gain of catalytic residue at P16 (P = 0.0055);Gain of catalytic residue at P16 (P = 0.0055);Gain of catalytic residue at P16 (P = 0.0055);Gain of catalytic residue at P16 (P = 0.0055);Gain of catalytic residue at P16 (P = 0.0055);Gain of catalytic residue at P16 (P = 0.0055);Gain of catalytic residue at P16 (P = 0.0055);Gain of catalytic residue at P16 (P = 0.0055);Gain of catalytic residue at P16 (P = 0.0055);Gain of catalytic residue at P16 (P = 0.0055);Gain of catalytic residue at P16 (P = 0.0055);Gain of catalytic residue at P16 (P = 0.0055);
MVP		0.91
MPC		1.0
ClinPred		0.64	D
GERP RS		5.7
Varity_R		0.23
gMVP		0.26

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.030		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: rs535623413; hg19: chr12-113266157;