chr16-89739264-C-G

Variant names:

• chr16-89739264-C-G
• NM_000135.4:c.4036G>C

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 4P and 1B. PM2 PM5 BP4

The NM_000135.4(FANCA):​c.4036G>C​(p.Ala1346Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts 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. A1346T) has been classified as Pathogenic.

• Frequency: Genomes: not found (cov: 33)
• Consequence: FANCA NM_000135.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.180

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]

ZNF276 (HGNC:23330): (zinc finger protein 276) Enables sequence-specific double-stranded DNA binding activity. Predicted to be involved in regulation of transcription by RNA polymerase II. Located in kinetochore. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Uncertain_significance. Variant got 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr16-89739264-C-T is described in Lovd as [Pathogenic].
• BP4: Computational evidence support a benign effect (MetaRNN=0.2756836).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
FANCA	NM_000135.4	c.4036G>C	p.Ala1346Pro	missense_variant	Exon 41 of 43	ENST00000389301.8	NP_000126.2
ZNF276	NM_001113525.2	c.*1018C>G		3_prime_UTR_variant	Exon 11 of 11	ENST00000443381.7	NP_001106997.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
FANCA	ENST00000389301.8	c.4036G>C	p.Ala1346Pro	missense_variant	Exon 41 of 43	1	NM_000135.4	ENSP00000373952.3
ZNF276	ENST00000443381.7	c.*1018C>G		3_prime_UTR_variant	Exon 11 of 11	1	NM_001113525.2	ENSP00000415836.2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 35

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.20
BayesDel_addAF	Uncertain	0.065	T
BayesDel_noAF	Benign	-0.14
CADD	Benign	8.4
DANN	Uncertain	0.99
DEOGEN2	Benign	0.33	T;.;T;.
Eigen	Benign	-0.38
Eigen_PC	Benign	-0.63
FATHMM_MKL	Benign	0.31	N
LIST_S2	Benign	0.67	T;T;T;T
M_CAP	Uncertain	0.12	D
MetaRNN	Benign	0.25	T;T;T;T
MetaSVM	Benign	-0.33	T
MutationAssessor	Uncertain	2.4	M;M;.;.
PrimateAI	Benign	0.29	T
PROVEAN	Uncertain	-2.5	N;N;D;D
REVEL	Uncertain	0.46
Sift	Benign	0.14	T;T;T;T
Sift4G	Benign	0.24	T;T;D;T
Polyphen		0.99	D;.;.;.
Vest4		0.46
MutPred		0.27		Loss of helix (P = 0.0444);Loss of helix (P = 0.0444);.;.;
MVP		0.96
ClinPred		0.32	T
GERP RS		-1.7
Varity_R		0.38
gMVP		0.51

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr16-89805672;