1-17413696-G-C

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_018715.4(RCC2):c.1048C>G(p.Arg350Gly) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: RCC2 NM_018715.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.99

Genes affected

RCC2 (HGNC:30297): (regulator of chromosome condensation 2) The protein encoded by this gene is a guanine exchange factor that is active on RalA, a small GTPase. The encoded protein and RalA are both essential for proper kinetochore-microtubule function in early mitosis. This protein has been shown to be a biomarker for colorectal cancer. [provided by RefSeq, Oct 2016]

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.854

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
RCC2	NM_018715.4	c.1048C>G	p.Arg350Gly	missense_variant	9/13	ENST00000375436.9
RCC2	NM_001136204.3	c.1048C>G	p.Arg350Gly	missense_variant	8/12

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
RCC2	ENST00000375436.9	c.1048C>G	p.Arg350Gly	missense_variant	9/13	1	NM_018715.4	P1
RCC2	ENST00000375433.3	c.1048C>G	p.Arg350Gly	missense_variant	8/12	1		P1

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

Aug 08, 2023

The c.1048C>G (p.R350G) alteration is located in exon 9 (coding exon 8) of the RCC2 gene. This alteration results from a C to G substitution at nucleotide position 1048, causing the arginine (R) at amino acid position 350 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	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.42	D
BayesDel_noAF	Pathogenic	0.37
Cadd	Pathogenic	30
Dann	Uncertain	1.0
DEOGEN2	Benign	0.24	T;T
Eigen	Pathogenic	0.83
Eigen_PC	Pathogenic	0.81
FATHMM_MKL	Pathogenic	0.98	D
M_CAP	Uncertain	0.18	D
MetaRNN	Pathogenic	0.85	D;D
MetaSVM	Uncertain	0.52	D
MutationAssessor	Uncertain	2.7	M;M
MutationTaster	Benign	1.0	D;D
PrimateAI	Pathogenic	0.91	D
PROVEAN	Pathogenic	-5.0	D;D
REVEL	Pathogenic	0.86
Sift	Benign	0.056	T;T
Sift4G	Benign	0.069	T;T
Polyphen		1.0	D;D
Vest4		0.91
MutPred		0.50		Loss of MoRF binding (P = 0.0186);Loss of MoRF binding (P = 0.0186);
MVP		0.86
MPC		2.2
ClinPred		0.99	D
GERP RS		5.3
Varity_R		0.82
gMVP		0.85

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: chr1-17740192;