1-231039982-G-A

Position:

• chr1-231039982-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_198552.3(FAM89A):​c.230C>T​(p.Ala77Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000816 in 1,225,448 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 8.2e-7 (0 hom.)
• Consequence: FAM89A NM_198552.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.42

Genes affected

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

ACMG classification

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=0.15942112).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
FAM89A	NM_198552.3	c.230C>T	p.Ala77Val	missense_variant	1/2	ENST00000366654.5	NP_940954.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
FAM89A	ENST00000366654.5	c.230C>T	p.Ala77Val	missense_variant	1/2	1	NM_198552.3	ENSP00000355614.4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 8.16e-7 AC: 1 AN: 1225448 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 600060

Gnomad4 AFR exome AF: 0.0000413

Gnomad4 AMR exome AF: 0.00

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.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Sep 14, 2022

The c.230C>T (p.A77V) alteration is located in exon 1 (coding exon 1) of the FAM89A gene. This alteration results from a C to T substitution at nucleotide position 230, causing the alanine (A) at amino acid position 77 to be replaced by a valine (V). 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	Benign	0.14
BayesDel_addAF	Benign	-0.15	T
BayesDel_noAF	Benign	-0.45
CADD	Benign	15
DANN	Uncertain	0.99
DEOGEN2	Benign	0.022	T
Eigen	Benign	-0.62
Eigen_PC	Benign	-0.70
FATHMM_MKL	Benign	0.51	D
LIST_S2	Benign	0.53	T
M_CAP	Uncertain	0.12	D
MetaRNN	Benign	0.16	T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	0.76	N
PrimateAI	Pathogenic	0.83	D
PROVEAN	Benign	-1.3	N
REVEL	Benign	0.078
Sift	Benign	0.12	T
Sift4G	Benign	0.18	T
Polyphen		0.62	P
Vest4		0.15
MutPred		0.39		Gain of sheet (P = 0.0266);
MVP		0.055
MPC		0.29
ClinPred		0.60	D
GERP RS		1.4
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.10
gMVP		0.24

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

Other links and lift over

dbSNP: rs1680232514; hg19: chr1-231175728;