Genetic Variant NM_001018113.3:c.652G>C (chrX-14864859-C-G) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_001018113.3(FANCB):c.652G>C(p.Glu218Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000912 in 1,096,170 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. 11/19 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: not found (cov: 24)

Exomes 𝑓: 9.1e-7 ( 0 hom. 1 hem. )

Consequence

FANCB
NM_001018113.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 3.02

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 links:

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ACMG classification

Classification made for transcript

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=0.16536182).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
FANCB	NM_001018113.3 link	c.652G>C	p.Glu218Gln	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.652G>C	p.Glu218Gln	missense_variant	Exon 3 of 10		NM_001018113.3	ENSP00000498215.1		Q8NB91

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000547

AC:

AN:

182767

Hom.:

AF XY:

0.0000148

AC XY:

AN XY:

67571

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000365

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

9.12e-7

AC:

AN:

1096170

Hom.:

Cov.:

AF XY:

0.00000277

AC XY:

AN XY:

361622

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000284

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:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

Bravo

AF:

0.00000378

ExAC

AF:

0.0000165

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Fanconi anemia

Uncertain:1

Jun 27, 2016

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces glutamic acid with glutamine at codon 218 of the FANCB protein (p.Glu218Gln). The glutamic acid residue is moderately conserved and there is a small physicochemical difference between glutamic acid and glutamine. The frequency data for this variant (rs747819351) in the population databases is unreliable, as metrics indicate poor quality at this position in the ExAC database. Algorithms developed to predict the effect of missense changes on protein structure and function do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Class C0"). In summary, this variant is a rare missense change with uncertain impact on protein function. It has been classified as a Variant of Uncertain Significance. -

Fanconi anemia complementation group B;C2931228:VACTERL association, X-linked, with or without hydrocephalus

Uncertain:1

Jan 05, 2022

Fulgent Genetics, Fulgent Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.12

BayesDel_addAF

Benign

-0.47

BayesDel_noAF

Benign

-0.80

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.32

T;T;T

FATHMM_MKL

Uncertain

0.92

LIST_S2

Benign

0.61

T;.;T

M_CAP

Uncertain

0.13

MetaRNN

Benign

0.17

T;T;T

MetaSVM

Benign

-1.1

MutationAssessor

Uncertain

2.5

M;M;.

PrimateAI

Benign

0.33

PROVEAN

Benign

-2.1

N;N;N

REVEL

Benign

0.084

Sift

Benign

0.088

T;T;T

Sift4G

Benign

0.15

T;T;T

Polyphen

0.98

D;D;.

Vest4

0.060

MutPred

0.26

Gain of helix (P = 0.132);Gain of helix (P = 0.132);Gain of helix (P = 0.132);

MVP

0.30

MPC

0.44

ClinPred

0.63

GERP RS

3.7

Varity_R

0.15

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over