4-39340929-C-G

Variant names:

• chr4-39340929-C-G
• rs6852802
• NM_002913.5:c.331+1416G>C

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_002913.5(RFC1):​c.331+1416G>C variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0697 in 152,134 control chromosomes in the GnomAD database, including 1,255 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.070 (1255 hom., cov: 32)
• Consequence: RFC1 NM_002913.5 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -2.24
• 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: STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet
• cerebellar ataxia, neuropathy, and vestibular areflexia syndrome

  Inheritance: AR Classification: MODERATE Submitted by: Ambry Genetics

ACMG classification

Our verdict: Benign. The variant received -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.85).
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.238 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
RFC1	NM_002913.5	c.331+1416G>C		intron_variant	Intron 4 of 24	ENST00000349703.7	NP_002904.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
RFC1	ENST00000349703.7	c.331+1416G>C		intron_variant	Intron 4 of 24	1	NM_002913.5	ENSP00000261424.4

Frequencies

GnomAD3 genomes AF: 0.0697 AC: 10594 AN: 152016 Hom.: 1253 Cov.: 32

Gnomad AFR AF: 0.243

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0265

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000415

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00316

Gnomad NFE AF: 0.000911

Gnomad OTH AF: 0.0459

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.0697 AC: 10599 AN: 152134 Hom.: 1255 Cov.: 32 AF XY: 0.0679 AC XY: 5049 AN XY: 74368

African (AFR) AF: 0.242 AC: 10032 AN: 41464

American (AMR) AF: 0.0265 AC: 405 AN: 15282

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3466

East Asian (EAS) AF: 0.00 AC: 0 AN: 5178

South Asian (SAS) AF: 0.000415 AC: 2 AN: 4818

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10594

Middle Eastern (MID) AF: 0.00680 AC: 2 AN: 294

European-Non Finnish (NFE) AF: 0.000912 AC: 62 AN: 68012

Other (OTH) AF: 0.0454 AC: 96 AN: 2114

Alfa AF: 0.00335 Hom.: 5

Bravo AF: 0.0781

Asia WGS AF: 0.0100 AC: 36 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.85
CADD	Benign	0.032
DANN	Benign	0.43
PhyloP100		-2.2
Mutation Taster		=100/0	polymorphism (auto)

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

Other links and lift over

dbSNP: rs6852802; hg19: chr4-39342549;