rs757018470

Positions:

• chr15-89260734-C-G
• chr15-89260734-C-T

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_001113378.2(FANCI):​c.179C>G​(p.Ala60Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000616 in 1,461,638 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000062 (0 hom.)
• Consequence: FANCI NM_001113378.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.230

Genes affected

FANCI (HGNC:25568): (FA complementation group I) The Fanconi anemia complementation group (FANC) currently includes FANCA, FANCB, FANCC, FANCD1 (also called BRCA2), FANCD2, FANCE, FANCF, FANCG, FANCI, FANCJ (also called BRIP1), FANCL, FANCM and FANCN (also called PALB2). The previously defined group FANCH is the same as FANCA. Fanconi anemia is a genetically heterogeneous recessive disorder characterized by cytogenetic instability, hypersensitivity to DNA crosslinking agents, increased chromosomal breakage, and defective DNA repair. The members of the Fanconi anemia complementation group do not share sequence similarity; they are related by their assembly into a common nuclear protein complex. This gene encodes the protein for complementation group I. Alternative splicing results in two transcript variants encoding different isoforms. [provided by RefSeq, Jul 2008]

FANCI (HGNC:):

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.063865155).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
FANCI	NM_001113378.2	c.179C>G	p.Ala60Gly	missense_variant	4/38	ENST00000310775.12	NP_001106849.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
FANCI	ENST00000310775.12	c.179C>G	p.Ala60Gly	missense_variant	4/38	1	NM_001113378.2	ENSP00000310842.8

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.0000358 AC: 9 AN: 251444 Hom.: 0 AF XY: 0.0000368 AC XY: 5 AN XY: 135892

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.000260

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000616 AC: 9 AN: 1461638 Hom.: 0 Cov.: 31 AF XY: 0.00000550 AC XY: 4 AN XY: 727132

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.000179

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: 0.00

Gnomad4 OTH exome AF: 0.0000166

GnomAD4 genome Cov.: 32

Alfa AF: 0.0000508 Hom.: 0

Bravo AF: 0.00000756

ExAC AF: 0.0000494 AC: 6

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Fanconi anemia Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Oct 05, 2021

This sequence change replaces alanine with glycine at codon 60 of the FANCI protein (p.Ala60Gly). The alanine residue is weakly conserved and there is a small physicochemical difference between alanine and glycine. This variant is present in population databases (rs757018470, ExAC 0.04%). This variant has not been reported in the literature in individuals affected with FANCI-related conditions. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated. Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may create or strengthen a splice site. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.099
BayesDel_addAF	Benign	-0.36	T
BayesDel_noAF	Benign	-0.46
CADD	Benign	19
DANN	Uncertain	0.99
DEOGEN2	Benign	0.053	.;T;T;T;T;.;T
Eigen	Benign	-0.12
Eigen_PC	Benign	-0.012
FATHMM_MKL	Benign	0.69	D
LIST_S2	Benign	0.70	T;T;T;T;T;T;T
M_CAP	Benign	0.028	D
MetaRNN	Benign	0.064	T;T;T;T;T;T;T
MetaSVM	Benign	-0.92	T
MutationAssessor	Uncertain	2.3	M;M;.;.;.;M;.
PrimateAI	Benign	0.28	T
PROVEAN	Benign	-0.67	N;N;N;N;N;N;N
REVEL	Benign	0.054
Sift	Benign	0.46	T;T;T;T;T;T;T
Sift4G	Benign	0.35	T;T;T;T;T;T;T
Polyphen		0.47	P;B;.;.;.;.;.
Vest4		0.13
MutPred		0.19		Gain of loop (P = 0.0166);Gain of loop (P = 0.0166);Gain of loop (P = 0.0166);Gain of loop (P = 0.0166);Gain of loop (P = 0.0166);Gain of loop (P = 0.0166);Gain of loop (P = 0.0166);
MVP		0.79
MPC		0.017
ClinPred		0.082	T
GERP RS		4.6
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.046
gMVP		0.093

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.14		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: rs757018470; hg19: chr15-89803965;