Genetic Variant FAM89A:p.Gly123Arg (chr1-231020051-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_198552.3(FAM89A):c.367G>A(p.Gly123Arg) variant causes a missense change. The variant allele was found at a frequency of 0.00000342 in 1,461,824 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000034 ( 0 hom. )

Consequence

FAM89A
NM_198552.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 5.00

Variant links:

Genes affected

FAM89A (HGNC:25057): (family with sequence similarity 89 member A)

FAM89A links:

MIR1182 (HGNC:35263): (microRNA 1182) microRNAs (miRNAs) are short (20-24 nt) non-coding RNAs that are involved in post-transcriptional regulation of gene expression in multicellular organisms by affecting both the stability and translation of mRNAs. miRNAs are transcribed by RNA polymerase II as part of capped and polyadenylated primary transcripts (pri-miRNAs) that can be either protein-coding or non-coding. The primary transcript is cleaved by the Drosha ribonuclease III enzyme to produce an approximately 70-nt stem-loop precursor miRNA (pre-miRNA), which is further cleaved by the cytoplasmic Dicer ribonuclease to generate the mature miRNA and antisense miRNA star (miRNA*) products. The mature miRNA is incorporated into a RNA-induced silencing complex (RISC), which recognizes target mRNAs through imperfect base pairing with the miRNA and most commonly results in translational inhibition or destabilization of the target mRNA. The RefSeq represents the predicted microRNA stem-loop. [provided by RefSeq, Sep 2009]

MIR1182 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
FAM89A	NM_198552.3 link	c.367G>A	p.Gly123Arg	missense_variant	Exon 2 of 2	ENST00000366654.5	NP_940954.1	Q96GI7
MIR1182	NR_031593.1 link	n.-127G>A		upstream_gene_variant
MIR1182	unassigned_transcript_305	n.-188G>A		upstream_gene_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
FAM89A	ENST00000366654.5 link	c.367G>A	p.Gly123Arg	missense_variant	Exon 2 of 2	1	NM_198552.3	ENSP00000355614.4	Q96GI7
FAM89A	ENST00000466258.1 link	n.350G>A		non_coding_transcript_exon_variant	Exon 2 of 2	3
FAM89A	ENST00000494111.1 link	n.701G>A		non_coding_transcript_exon_variant	Exon 3 of 3	5
MIR1182	ENST00000408363.1 link	n.-127G>A		upstream_gene_variant		6

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000796

AC:

AN:

251302

Hom.:

AF XY:

0.00000736

AC XY:

AN XY:

135818

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000578

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:

0.00000342

AC:

AN:

1461824

Hom.:

Cov.:

AF XY:

0.00000275

AC XY:

AN XY:

727220

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000112

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:

0.0000113

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jan 19, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.367G>A (p.G123R) alteration is located in exon 2 (coding exon 2) of the FAM89A gene. This alteration results from a G to A substitution at nucleotide position 367, causing the glycine (G) at amino acid position 123 to be replaced by an arginine (R). 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

0.88

BayesDel_addAF

Pathogenic

0.25

BayesDel_noAF

Pathogenic

0.30

CADD

Uncertain

DANN

Pathogenic

1.0

DEOGEN2

Benign

0.10

Eigen

Uncertain

0.56

Eigen_PC

Uncertain

0.52

FATHMM_MKL

Uncertain

0.93

LIST_S2

Uncertain

0.87

M_CAP

Benign

0.022

MetaRNN

Uncertain

0.53

MetaSVM

Benign

-0.30

MutationAssessor

Uncertain

2.5

PrimateAI

Uncertain

0.72

PROVEAN

Benign

-2.0

REVEL

Benign

0.28

Sift

Benign

0.082

Sift4G

Benign

0.36

Polyphen

0.99

Vest4

0.63

MutPred

0.25

Gain of solvent accessibility (P = 0.0306);

MVP

0.11

MPC

1.1

ClinPred

0.93

GERP RS

4.8

Varity_R

0.27

gMVP

0.61

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