16-89816593-T-G

Variant names:

• chr16-89816593-T-G
• NM_000135.4:c.23A>C

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_000135.4(FANCA):​c.23A>C​(p.Asn8Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000727 in 1,374,818 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/20 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. N8K) has been classified as Benign.

• Frequency:
  • Genomes: not found (cov: 34)
  • Exomes 𝑓: 7.3e-7 (0 hom.)
• Consequence: FANCA NM_000135.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -4.84

Genes affected

FANCA (HGNC:3582): (FA complementation group A) 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 A. Alternative splicing results in multiple transcript variants encoding different isoforms. Mutations in this gene are the most common cause of Fanconi anemia. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.17094615).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
FANCA	NM_000135.4	c.23A>C	p.Asn8Thr	missense_variant	Exon 1 of 43	ENST00000389301.8	NP_000126.2
FANCA	NM_001286167.3	c.23A>C	p.Asn8Thr	missense_variant	Exon 1 of 43		NP_001273096.1
FANCA	NM_001018112.3	c.23A>C	p.Asn8Thr	missense_variant	Exon 1 of 11		NP_001018122.1
FANCA	NM_001351830.2	c.23A>C	p.Asn8Thr	missense_variant	Exon 1 of 10		NP_001338759.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
FANCA	ENST00000389301.8	c.23A>C	p.Asn8Thr	missense_variant	Exon 1 of 43	1	NM_000135.4	ENSP00000373952.3

Frequencies

GnomAD3 genomes Cov.: 34

GnomAD4 exome AF: 7.27e-7 AC: 1 AN: 1374818 Hom.: 0 Cov.: 31 AF XY: 0.00000147 AC XY: 1 AN XY: 679430

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: 9.28e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 34

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.083
BayesDel_addAF	Benign	-0.098	T
BayesDel_noAF	Benign	-0.38
CADD	Benign	0.0020
DANN	Benign	0.58
DEOGEN2	Benign	0.060	T;.;.;T;T;.
Eigen	Benign	-1.7
Eigen_PC	Benign	-1.8
FATHMM_MKL	Benign	0.098	N
LIST_S2	Benign	0.52	T;T;T;T;T;T
M_CAP	Pathogenic	0.57	D
MetaRNN	Benign	0.17	T;T;T;T;T;T
MetaSVM	Benign	-0.84	T
MutationAssessor	Benign	0.0	N;N;N;.;.;.
PrimateAI	Uncertain	0.66	T
PROVEAN	Benign	-0.14	N;N;N;N;N;N
REVEL	Benign	0.094
Sift	Benign	0.18	T;T;T;T;T;T
Sift4G	Benign	0.39	T;T;T;T;T;T
Polyphen		0.0	B;.;.;.;B;B
Vest4		0.18
MutPred		0.074		Gain of glycosylation at N8 (P = 0.0127);Gain of glycosylation at N8 (P = 0.0127);Gain of glycosylation at N8 (P = 0.0127);Gain of glycosylation at N8 (P = 0.0127);Gain of glycosylation at N8 (P = 0.0127);Gain of glycosylation at N8 (P = 0.0127);
MVP		0.59
ClinPred		0.12	T
GERP RS		-8.4
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.050
gMVP		0.059

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr16-89883001;