Genetic Variant FAM222A:p.Arg68Cys (chr12-109768131-C-T) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

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

The NM_032829.3(FAM222A):c.202C>T(p.Arg68Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000753 in 1,461,690 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.0000075 ( 0 hom. )

Consequence

FAM222A
NM_032829.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 3.25

Variant links:

Genes affected

FAM222A (HGNC:25915): (family with sequence similarity 222 member A)

FAM222A links:

FAM222A-AS1 (HGNC:28223): (FAM222A antisense RNA 1)

FAM222A-AS1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
FAM222A	NM_032829.3 link	c.202C>T	p.Arg68Cys	missense_variant	Exon 3 of 3	ENST00000538780.2	NP_116218.2	Q5U5X8A0A024RBN3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
FAM222A	ENST00000538780.2 link	c.202C>T	p.Arg68Cys	missense_variant	Exon 3 of 3	1	NM_032829.3	ENSP00000443292.1	Q5U5X8
FAM222A	ENST00000358906.3 link	c.202C>T	p.Arg68Cys	missense_variant	Exon 3 of 3	5		ENSP00000351783.3	Q5U5X8
FAM222A-AS1	ENST00000541460.2 link	n.189+5166G>A		intron_variant	Intron 1 of 3	4
FAM222A-AS1	ENST00000541723.5 link	n.212+5166G>A		intron_variant	Intron 1 of 2	2

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.0000358

AC:

AN:

251078

Hom.:

AF XY:

0.0000368

AC XY:

AN XY:

135802

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000289

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000381

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.00000753

AC:

AN:

1461690

Hom.:

Cov.:

AF XY:

0.00000413

AC XY:

AN XY:

727160

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.0000447

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.000101

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000180

Gnomad4 OTH exome

AF:

0.0000331

GnomAD4 genome

Cov.:

Alfa

AF:

0.0000868

Hom.:

Bravo

AF:

0.00000378

ExAC

AF:

0.0000165

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Aug 15, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.202C>T (p.R68C) alteration is located in exon 3 (coding exon 2) of the FAM222A gene. This alteration results from a C to T substitution at nucleotide position 202, causing the arginine (R) at amino acid position 68 to be replaced by a cysteine (C). 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

AlphaMissense

Pathogenic

0.71

BayesDel_addAF

Benign

-0.23

BayesDel_noAF

Benign

-0.26

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Benign

0.11

T;T

Eigen

Uncertain

0.29

Eigen_PC

Benign

0.20

FATHMM_MKL

Uncertain

0.78

LIST_S2

Pathogenic

0.98

.;D

M_CAP

Benign

0.037

MetaRNN

Uncertain

0.45

T;T

MetaSVM

Benign

-0.97

MutationAssessor

Uncertain

2.1

M;M

PrimateAI

Pathogenic

0.79

PROVEAN

Pathogenic

-5.4

D;D

REVEL

Benign

0.27

Sift

Pathogenic

0.0

D;D

Sift4G

Pathogenic

0.0010

D;D

Polyphen

1.0

D;D

Vest4

0.75

MutPred

0.41

Loss of MoRF binding (P = 0.0054);Loss of MoRF binding (P = 0.0054);

MVP

0.17

MPC

0.55

ClinPred

0.97

GERP RS

2.4

Varity_R

0.60

gMVP

0.58

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