rs755283850

Variant names:

• chr9-95171079-C-A
• rs755283850
• NM_000136.3:c.521G>T

Your query was ambiguous. Multiple possible variants found:

• chr9-95171079-C-A
• chr9-95171079-C-G
• chr9-95171079-C-T

Variant summary

Our verdict is Likely pathogenic. The variant received 6 ACMG points: 6P and 0B. PM2 PP3_Strong

The NM_000136.3(FANCC):​c.521G>T​(p.Arg174Leu) variant causes a missense, splice region change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. 3/3 splice prediction tools predicting alterations to normal splicing. 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. R174Q) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: FANCC NM_000136.3 missense, splice_region
• Scores: Splicing: ADA: 1.000
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.55
• Publications: 0 publications found

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]

FANCC Gene-Disease associations (from GenCC):

• Fanconi anemia complementation group C

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: ClinGen, Labcorp Genetics (formerly Invitae), G2P, Myriad Women’s Health
• Fanconi anemia

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• colorectal cancer

  Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics
• malignant pancreatic neoplasm

  Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics
• ovarian cancer

  Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics
• prostate cancer

  Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics
• breast cancer

  Inheritance: AD Classification: NO_KNOWN Submitted by: Ambry Genetics

ACMG classification

Our verdict: Likely_pathogenic. The variant received 6 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: Splicing predictors support a deleterious effect. Scorers claiming Pathogenic: dbscSNV1_ADA, dbscSNV1_RF, max_spliceai. No scorers claiming Uncertain. No scorers claiming Benign.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000136.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	FANCC	NM_000136.3	MANE Select	c.521G>T	p.Arg174Leu	missense splice_region	Exon 6 of 15	NP_000127.2
	FANCC	NM_001243743.2		c.521G>T	p.Arg174Leu	missense splice_region	Exon 6 of 15	NP_001230672.1
	FANCC	NM_001243744.2		c.521G>T	p.Arg174Leu	missense splice_region	Exon 6 of 14	NP_001230673.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	FANCC	ENST00000289081.8	TSL:1 MANE Select	c.521G>T	p.Arg174Leu	missense splice_region	Exon 6 of 15	ENSP00000289081.3
	FANCC	ENST00000375305.6	TSL:1	c.521G>T	p.Arg174Leu	missense splice_region	Exon 6 of 15	ENSP00000364454.1
	FANCC	ENST00000490972.7	TSL:1	c.521G>T	p.Arg174Leu	missense splice_region	Exon 6 of 14	ENSP00000479931.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions as Germline

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	Hereditary cancer-predisposing syndrome (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.22
BayesDel_addAF	Benign	0.010	T
BayesDel_noAF	Benign	-0.22
CADD	Pathogenic	31
DANN	Uncertain	1.0
DEOGEN2	Benign	0.36	T
Eigen	Uncertain	0.33
Eigen_PC	Uncertain	0.32
FATHMM_MKL	Uncertain	0.82	D
LIST_S2	Benign	0.80	T
M_CAP	Benign	0.062	D
MetaRNN	Pathogenic	0.95	D
MetaSVM	Benign	-0.73	T
MutationAssessor	Uncertain	2.1	M
PhyloP100		1.6
PrimateAI	Benign	0.34	T
PROVEAN	Uncertain	-2.9	D
REVEL	Uncertain	0.36
Sift	Uncertain	0.0090	D
Sift4G	Uncertain	0.028	D
Polyphen		0.88	P
Vest4		0.79
MutPred		0.85		Loss of disorder (P = 0.0358)
MVP		0.86
MPC		0.35
ClinPred		0.98	D
GERP RS		3.1
Varity_R		0.30
gMVP		0.44
Mutation Taster		=41/59	disease causing

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Pathogenic	1.0
dbscSNV1_RF	Pathogenic	0.96
SpliceAI score (max)		0.92		Details are displayed if max score is > 0.2
DS_DL_spliceai		0.92		Position offset: 0

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs755283850; hg19: chr9-97933361;