Genetic Variant FAAP20:p.His105His (chr1-2193794-G-A) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_001282671.2(FAAP20):c.-763C>T variant causes a 5 prime UTR premature start codon gain change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000156 in 1,603,352 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000092 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000076 ( 0 hom. )

Consequence

FAAP20
NM_001282671.2 5_prime_UTR_premature_start_codon_gain

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -3.23

Variant links:

Genes affected

FAAP20 (HGNC:26428): (FA core complex associated protein 20) Enables K63-linked polyubiquitin modification-dependent protein binding activity and ubiquitin-dependent protein binding activity. Involved in interstrand cross-link repair and translesion synthesis. Located in cell junction; chromosome; and nuclear body. Part of Fanconi anaemia nuclear complex. [provided by Alliance of Genome Resources, Apr 2022]

FAAP20 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.053819537).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
FAAP20	NM_182533.4 link	c.315C>T	p.His105His	synonymous_variant	Exon 3 of 4	ENST00000378546.9	NP_872339.3	Q6NZ36-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
FAAP20	ENST00000378546.9 link	c.315C>T	p.His105His	synonymous_variant	Exon 3 of 4	1	NM_182533.4	ENSP00000367808.4		Q6NZ36-1

Frequencies

GnomAD3 genomes

AF:

0.0000920

AC:

AN:

152208

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000314

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000255

AC:

AN:

235370

Hom.:

AF XY:

0.0000463

AC XY:

AN XY:

129516

show subpopulations

Gnomad AFR exome

AF:

0.000269

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000338

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.000176

GnomAD4 exome

AF:

0.00000758

AC:

AN:

1451144

Hom.:

Cov.:

AF XY:

0.00000692

AC XY:

AN XY:

722300

show subpopulations

Gnomad4 AFR exome

AF:

0.000245

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000117

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

9.02e-7

Gnomad4 OTH exome

AF:

0.0000167

GnomAD4 genome

AF:

0.0000920

AC:

AN:

152208

Hom.:

Cov.:

AF XY:

0.000108

AC XY:

AN XY:

74356

show subpopulations

Gnomad4 AFR

AF:

0.000314

Gnomad4 AMR

AF:

0.0000654

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000135

Hom.:

Bravo

AF:

0.0000907

ExAC

AF:

0.0000413

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jun 03, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.302C>T (p.T101M) alteration is located in exon 7 (coding exon 3) of the FAAP20 gene. This alteration results from a C to T substitution at nucleotide position 302, causing the threonine (T) at amino acid position 101 to be replaced by a methionine (M). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Benign

-0.59

BayesDel_noAF

Benign

-0.79

CADD

Benign

0.22

DANN

Benign

0.57

Eigen

Benign

-1.5

Eigen_PC

Benign

-1.7

FATHMM_MKL

Benign

0.013

LIST_S2

Benign

0.27

T;T

M_CAP

Benign

0.0078

MetaRNN

Benign

0.054

T;T

MetaSVM

Benign

-0.99

PROVEAN

Pathogenic

-5.5

.;D

REVEL

Benign

0.045

Sift4G

Pathogenic

0.0

D;D

Vest4

0.17

MVP

0.14

ClinPred

0.039

GERP RS

-6.7

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

gMVP

0.057

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