Genetic Variant RCC2:p.Gly66Cys (chr1-17438319-C-A) – ACMG Classification: Benign (-8 pts)

Variant summary

Our verdict is Benign. Variant got -8 ACMG points: 0P and 8B. BP4_StrongBS2

The NM_018715.4(RCC2):c.196G>T(p.Gly66Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000887 in 1,239,958 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. G66D) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000020 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000073 ( 0 hom. )

Consequence

RCC2
NM_018715.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.44

Variant links:

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]

RCC2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -8 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.026974052).

BS2

High AC in GnomAdExome4 at 8 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
RCC2	NM_018715.4 link	c.196G>T	p.Gly66Cys	missense_variant	Exon 2 of 13	ENST00000375436.9	NP_061185.1	Q9P258A0A024RAC5
RCC2	NM_001136204.3 link	c.196G>T	p.Gly66Cys	missense_variant	Exon 1 of 12		NP_001129676.1	Q9P258A0A024RAC5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
RCC2	ENST00000375436.9 link	c.196G>T	p.Gly66Cys	missense_variant	Exon 2 of 13	1	NM_018715.4	ENSP00000364585.4		Q9P258
RCC2	ENST00000375433.3 link	c.196G>T	p.Gly66Cys	missense_variant	Exon 1 of 12	1		ENSP00000364582.3		Q9P258

Frequencies

GnomAD3 genomes

AF:

0.0000201

AC:

AN:

149460

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000583

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

AF:

0.00000734

AC:

AN:

1090498

Hom.:

Cov.:

AF XY:

0.00000567

AC XY:

AN XY:

528852

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000132

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.000250

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.0000485

GnomAD4 genome

AF:

0.0000201

AC:

AN:

149460

Hom.:

Cov.:

AF XY:

0.0000412

AC XY:

AN XY:

72890

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000583

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000416

ExAC

AF:

0.0000633

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

May 05, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.196G>T (p.G66C) alteration is located in exon 2 (coding exon 1) of the RCC2 gene. This alteration results from a G to T substitution at nucleotide position 196, causing the glycine (G) at amino acid position 66 to be replaced by a cysteine (C). 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

0.13

BayesDel_addAF

Benign

-0.15

BayesDel_noAF

Benign

-0.46

CADD

Uncertain

DANN

Uncertain

0.99

DEOGEN2

Benign

0.049

T;T

Eigen

Benign

-0.13

Eigen_PC

Benign

-0.12

FATHMM_MKL

Benign

0.11

M_CAP

Pathogenic

0.47

MetaRNN

Benign

0.027

T;T

MetaSVM

Benign

-0.97

MutationAssessor

Benign

0.34

N;N

PrimateAI

Pathogenic

0.83

PROVEAN

Benign

-0.68

N;N

REVEL

Benign

0.085

Sift

Uncertain

0.022

D;D

Sift4G

Uncertain

0.010

D;D

Polyphen

0.99

D;D

Vest4

0.28

MutPred

0.36

Gain of methylation at K67 (P = 0.0259);Gain of methylation at K67 (P = 0.0259);

MVP

0.13

MPC

0.91

ClinPred

0.63

GERP RS

2.5

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.20

gMVP

0.44

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over