rs780179187

chr9-95107086-C-Achr9-95107086-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2 PP3

The NM_000136.3(FANCC):c.1513G>T(p.Ala505Ser) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic 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. A505T) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 33)
• Consequence: FANCC NM_000136.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.54

Genes affected

FANCC (HGNC:3584): (FA complementation group C) 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 C. [provided by RefSeq, Jul 2008]

LOC107987102 (HGNC:):

AOPEP (HGNC:1361): (aminopeptidase O (putative)) This gene encodes a member of the M1 zinc aminopeptidase family. The encoded protein is a zinc-dependent metallopeptidase that catalyzes the removal of an amino acid from the amino terminus of a protein or peptide. This protein may play a role in the generation of angiotensin IV. Alternate splicing results in multiple transcript variants. [provided by RefSeq, Oct 2010]

ACMG classification

Verdict is Uncertain_significance. Variant got 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.751

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
FANCC	NM_000136.3	c.1513G>T	p.Ala505Ser	missense_variant	14/15	ENST00000289081.8
LOC107987102	XR_001746847.2	n.504C>A		non_coding_transcript_exon_variant	2/2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
FANCC	ENST00000289081.8	c.1513G>T	p.Ala505Ser	missense_variant	14/15	1	NM_000136.3	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 33

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

Invitae

May 21, 2019

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. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Tolerated"; PolyPhen-2: "Probably Damaging"; Align-GVGD: "Class C0"). This variant has not been reported in the literature in individuals with FANCC-related conditions. This variant is not present in population databases (ExAC no frequency). This sequence change replaces alanine with serine at codon 505 of the FANCC protein (p.Ala505Ser). The alanine residue is moderately conserved and there is a moderate physicochemical difference between alanine and serine. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.15
BayesDel_addAF	Benign	-0.049	T
BayesDel_noAF	Benign	-0.31
Cadd	Benign	23
Dann	Uncertain	0.99
DEOGEN2	Benign	0.24	T;T
Eigen	Uncertain	0.41
Eigen_PC	Uncertain	0.27
FATHMM_MKL	Uncertain	0.91	D
M_CAP	Benign	0.020	T
MetaRNN	Pathogenic	0.75	D;D
MetaSVM	Benign	-0.54	T
MutationAssessor	Uncertain	2.3	M;M
MutationTaster	Benign	0.77	N;N
PrimateAI	Benign	0.45	T
PROVEAN	Benign	-2.3	N;N
REVEL	Uncertain	0.32
Sift	Uncertain	0.013	D;D
Sift4G	Uncertain	0.015	D;D
Polyphen		1.0	D;D
Vest4		0.50
MutPred		0.60		Loss of helix (P = 0.028);Loss of helix (P = 0.028);
MVP		0.80
MPC		0.32
ClinPred		0.96	D
GERP RS		4.9
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.20
gMVP		0.19

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

Other links and lift over

dbSNP: rs780179187; hg19: chr9-97869368;