chr4-39295714-T-C

Variant names:

• chr4-39295714-T-C
• rs1469849381
• NM_002913.5:c.2854A>G

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_002913.5(RFC1):​c.2854A>G​(p.Met952Val) variant causes a missense change. The variant allele was found at a frequency of 0.00000186 in 1,613,560 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. M952L) has been classified as Uncertain significance.

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: RFC1 NM_002913.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 6.24
• Publications: 0 publications found

Genes affected

RFC1 (HGNC:9969): (replication factor C subunit 1) This gene encodes the large subunit of replication factor C, a five subunit DNA polymerase accessory protein, which is a DNA-dependent ATPase required for eukaryotic DNA replication and repair. The large subunit acts as an activator of DNA polymerases, binds to the 3' end of primers, and promotes coordinated synthesis of both strands. It may also have a role in telomere stability. Alternatively spliced transcript variants encoding different isoforms have been noted for this gene. [provided by RefSeq, Mar 2011]

RFC1 Gene-Disease associations (from GenCC):

• cerebellar ataxia with neuropathy and bilateral vestibular areflexia syndrome

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae), ClinGen
• cerebellar ataxia, neuropathy, and vestibular areflexia syndrome

  Inheritance: AR Classification: MODERATE Submitted by: Ambry Genetics

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_002913.5. 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
	RFC1	NM_002913.5	MANE Select	c.2854A>G	p.Met952Val	missense	Exon 22 of 25	NP_002904.3
	RFC1	NM_001204747.2		c.2857A>G	p.Met953Val	missense	Exon 22 of 25	NP_001191676.1	P35251-1
	RFC1	NM_001363496.2		c.2779A>G	p.Met927Val	missense	Exon 21 of 24	NP_001350425.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	RFC1	ENST00000349703.7	TSL:1 MANE Select	c.2854A>G	p.Met952Val	missense	Exon 22 of 25	ENSP00000261424.4	P35251-2
	RFC1	ENST00000381897.5	TSL:1	c.2857A>G	p.Met953Val	missense	Exon 22 of 25	ENSP00000371321.1	P35251-1
	RFC1	ENST00000906184.1		c.2857A>G	p.Met953Val	missense	Exon 22 of 25	ENSP00000576243.1

Frequencies

GnomAD3 genomes AF: 0.00000657 AC: 1 AN: 152102 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000242

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

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

GnomAD2 exomes AF: 0.00000399 AC: 1 AN: 250882 AF XY: 0.00000737

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 FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000880

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461458 Hom.: 0 Cov.: 30 AF XY: 0.00000275 AC XY: 2 AN XY: 727028

African (AFR) AF: 0.00 AC: 0 AN: 33474

American (AMR) AF: 0.00 AC: 0 AN: 44676

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26128

East Asian (EAS) AF: 0.00 AC: 0 AN: 39696

South Asian (SAS) AF: 0.00 AC: 0 AN: 86160

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53416

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00000180 AC: 2 AN: 1111778

Other (OTH) AF: 0.00 AC: 0 AN: 60362

GnomAD4 genome AF: 0.00000657 AC: 1 AN: 152102 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 74292

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.0000242 AC: 1 AN: 41406

American (AMR) AF: 0.00 AC: 0 AN: 15270

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5198

South Asian (SAS) AF: 0.00 AC: 0 AN: 4822

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10602

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 68010

Other (OTH) AF: 0.00 AC: 0 AN: 2094

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5. (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

Alfa AF: 0.00 Hom.: 0

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.13
BayesDel_addAF	Uncertain	0.075	D
BayesDel_noAF	Benign	-0.13
CADD	Benign	22
DANN	Benign	0.95
DEOGEN2	Benign	0.093	T
Eigen	Benign	-0.069
Eigen_PC	Benign	0.066
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.95	D
M_CAP	Benign	0.020	T
MetaRNN	Uncertain	0.71	D
MetaSVM	Benign	-1.0	T
MutationAssessor	Uncertain	2.5	M
PhyloP100		6.2
PrimateAI	Uncertain	0.63	T
PROVEAN	Benign	-1.8	N
REVEL	Benign	0.21
Sift	Benign	0.13	T
Sift4G	Benign	0.062	T
Polyphen		0.0020	B
Vest4		0.76
MutPred		0.68		Loss of phosphorylation at Y952 (P = 0.1109)
MVP		0.34
MPC		0.18
ClinPred		0.50	T
GERP RS		4.5
Varity_R		0.39
gMVP		0.67
Mutation Taster		=76/24	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs1469849381; hg19: chr4-39297334; COSMIC: COSV62899693; COSMIC: COSV62899693;