2-151436887-G-T

Position:

• chr2-151436887-G-T

Variant summary

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

The NM_018151.5(RIF1):​c.1256G>T​(p.Gly419Val) variant causes a missense change. The variant allele was found at a frequency of 0.00000821 in 1,461,464 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 (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000082 (0 hom.)
• Consequence: RIF1 NM_018151.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.84

Genes affected

RIF1 (HGNC:23207): (replication timing regulatory factor 1) This gene encodes a protein that shares homology with the yeast teleomere binding protein, Rap1 interacting factor 1. This protein localizes to aberrant telomeres may be involved in DNA repair. Alternate splicing results in multiple transcript variants. [provided by RefSeq, Apr 2010]

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=0.4106742).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
RIF1	NM_018151.5	c.1256G>T	p.Gly419Val	missense_variant	12/36	ENST00000444746.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
RIF1	ENST00000444746.7	c.1256G>T	p.Gly419Val	missense_variant	12/36	1	NM_018151.5	P2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000821 AC: 12 AN: 1461464 Hom.: 0 Cov.: 33 AF XY: 0.00000963 AC XY: 7 AN XY: 727052

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: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000108

Gnomad4 OTH exome AF: 0.00

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

Sep 01, 2021

The c.1256G>T (p.G419V) alteration is located in exon 12 (coding exon 11) of the RIF1 gene. This alteration results from a G to T substitution at nucleotide position 1256, causing the glycine (G) at amino acid position 419 to be replaced by a valine (V). 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	-0.098	T
BayesDel_noAF	Benign	-0.38
CADD	Uncertain	24
DANN	Uncertain	0.99
DEOGEN2	Benign	0.22	T;.;.;T;.
Eigen	Uncertain	0.34
Eigen_PC	Uncertain	0.44
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Benign	0.70	.;.;.;T;T
M_CAP	Benign	0.022	T
MetaRNN	Benign	0.41	T;T;T;T;T
MetaSVM	Benign	-0.80	T
MutationAssessor	Uncertain	2.6	M;M;M;M;M
MutationTaster	Benign	1.0	D;D;D;D;D;D
PrimateAI	Benign	0.42	T
PROVEAN	Benign	-1.9	N;N;N;N;N
REVEL	Benign	0.091
Sift	Uncertain	0.0060	D;D;D;D;D
Sift4G	Benign	0.13	T;T;T;T;T
Polyphen		0.92	P;D;D;P;D
Vest4		0.48
MutPred		0.41		Loss of disorder (P = 0.0238);Loss of disorder (P = 0.0238);Loss of disorder (P = 0.0238);Loss of disorder (P = 0.0238);Loss of disorder (P = 0.0238);
MVP		0.23
MPC		0.31
ClinPred		0.93	D
GERP RS		5.6
Varity_R		0.22
gMVP		0.34

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

Publications

LitVar

Other links and lift over

dbSNP: rs550977351; hg19: chr2-152293401;