NM_001018113.3:c.884G>A

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 0P and 5B. BP4_StrongBP6

The NM_001018113.3(FANCB):c.884G>A(p.Gly295Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000058 in 1,207,547 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 1 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. 15/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Synonymous variant affecting the same amino acid position (i.e. G295G) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.0000089 ( 0 hom., 0 hem., cov: 23)

Exomes 𝑓: 0.0000055 ( 0 hom. 1 hem. )

Consequence

FANCB
NM_001018113.3 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:1

Conservation

PhyloP100: -0.233

Publications

0 publications found

Variant links:

Genes affected

FANCB (HGNC:3583): (FA complementation group B) This gene encodes a member of the Fanconi anemia complementation group B. This protein is assembled into a nucleoprotein complex that is involved in the repair of DNA lesions. Mutations in this gene can cause chromosome instability and VACTERL syndrome with hydrocephalus. [provided by RefSeq, Apr 2016]

FANCB Gene-Disease associations (from GenCC):

Fanconi anemia complementation group B
Inheritance: XL Classification: DEFINITIVE, STRONG Submitted by: G2P, ClinGen, Labcorp Genetics (formerly Invitae)
VACTERL association, X-linked, with or without hydrocephalus
Inheritance: XL Classification: STRONG Submitted by: Genomics England PanelApp
Fanconi anemia
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
VACTERL with hydrocephalus
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

FANCB links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -5 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.06354463).

BP6

Variant X-14864627-C-T is Benign according to our data. Variant chrX-14864627-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 456190.We mark this variant Likely_benign, oryginal submission is: [Conflicting_classifications_of_pathogenicity].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
FANCB	NM_001018113.3 link	c.884G>A	p.Gly295Glu	missense_variant	Exon 3 of 10	ENST00000650831.1	NP_001018123.1	Q8NB91A0A024RBW1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
FANCB	ENST00000650831.1 link	c.884G>A	p.Gly295Glu	missense_variant	Exon 3 of 10		NM_001018113.3	ENSP00000498215.1		Q8NB91

Frequencies

GnomAD3 genomes

AF:

0.00000891

AC:

AN:

112267

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000188

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00000548

AC:

AN:

1095280

Hom.:

Cov.:

AF XY:

0.00000277

AC XY:

AN XY:

360700

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

26354

American (AMR)

AF:

0.00

AC:

AN:

35205

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

19363

East Asian (EAS)

AF:

0.00

AC:

AN:

30182

South Asian (SAS)

AF:

0.00

AC:

AN:

54082

European-Finnish (FIN)

AF:

0.00

AC:

AN:

40488

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4131

European-Non Finnish (NFE)

AF:

0.00000715

AC:

AN:

839472

Other (OTH)

AF:

0.00

AC:

AN:

46003

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.455

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00000891

AC:

AN:

112267

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

34415

show subpopulations

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

30954

American (AMR)

AF:

0.00

AC:

AN:

10577

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

2660

East Asian (EAS)

AF:

0.00

AC:

AN:

3579

South Asian (SAS)

AF:

0.00

AC:

AN:

2747

European-Finnish (FIN)

AF:

0.00

AC:

AN:

6053

Middle Eastern (MID)

AF:

0.00

AC:

AN:

237

European-Non Finnish (NFE)

AF:

0.0000188

AC:

AN:

53254

Other (OTH)

AF:

0.00

AC:

AN:

1519

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5. (p-value = 0.000000), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.375

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00000378

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Fanconi anemia complementation group B

Uncertain:1

Jun 17, 2025

St. Jude Molecular Pathology, St. Jude Children's Research Hospital

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The FANCB c.884G>A p.(Gly295Glu) missense change is absent in gnomAD v2.1.1 (https://gnomad.broadinstitute.org/). The in silico tool REVEL predicts a benign effect on protein function, but to our knowledge this prediction has not been confirmed by functional studies. To our knowledge, this variant has not been reported in the literature in individuals with Fanconi anemia. In summary, the evidence currently available is insufficient to determine the clinical significance of this variant. It has therefore been classified as of uncertain significance. -

Fanconi anemia

Benign:1

Apr 12, 2023

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.093

BayesDel_addAF

Benign

-0.50

BayesDel_noAF

Benign

-0.95

CADD

Benign

6.6

(source)

DANN

Benign

0.74

DEOGEN2

Benign

0.11

T;T;T

FATHMM_MKL

Benign

0.021

LIST_S2

Benign

0.53

T;.;T

M_CAP

Benign

0.0070

MetaRNN

Benign

0.064

T;T;T

MetaSVM

Benign

-0.94

MutationAssessor

Benign

1.3

L;L;.

PhyloP100

-0.23

PrimateAI

Benign

0.28

PROVEAN

Benign

-1.1

N;N;N

REVEL

Benign

0.066

Sift

Benign

0.49

T;T;T

Sift4G

Benign

0.80

T;T;T

Polyphen

0.0090

B;B;.

Vest4

0.11

MutPred

0.35

Gain of solvent accessibility (P = 0.0596);Gain of solvent accessibility (P = 0.0596);Gain of solvent accessibility (P = 0.0596);

MVP

0.093

MPC

0.15

ClinPred

0.042

GERP RS

-0.44

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.046

Mutation Taster

=99/1

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.070

Details are displayed if max score is > 0.2

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

Publications

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over