10-49132031-T-A

Variant names:

• chr10-49132031-T-A
• NM_001164484.2:c.434A>T

Variant summary

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

The NM_001164484.2(FAM170B):​c.434A>T​(p.Lys145Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 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: 33)
• Consequence: FAM170B NM_001164484.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.0130

Genes affected

FAM170B (HGNC:19736): (family with sequence similarity 170 member B) Predicted to be involved in fertilization; positive regulation of acrosome reaction; and regulation of fertilization. Located in acrosomal vesicle. [provided by Alliance of Genome Resources, Apr 2022]

FAM170B-AS1 (HGNC:45006): (FAM170B antisense RNA 1)

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=0.15332568).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
FAM170B	NM_001164484.2	c.434A>T	p.Lys145Met	missense_variant	Exon 2 of 2	ENST00000311787.6	NP_001157956.1
FAM170B-AS1	NR_038973.1	n.439-3625T>A		intron_variant	Intron 1 of 5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
FAM170B	ENST00000311787.6	c.434A>T	p.Lys145Met	missense_variant	Exon 2 of 2	1	NM_001164484.2	ENSP00000308292.6
FAM170B-AS1	ENST00000435809.1	n.192-3846T>A		intron_variant	Intron 1 of 2	3
FAM170B-AS1	ENST00000442525.5	n.439-3625T>A		intron_variant	Intron 1 of 5	2
FAM170B-AS1	ENST00000443389.5	n.434-9222T>A		intron_variant	Intron 1 of 5	5

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 39

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Feb 10, 2022

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.434A>T (p.K145M) alteration is located in exon 2 (coding exon 2) of the FAM170B gene. This alteration results from a A to T substitution at nucleotide position 434, causing the lysine (K) at amino acid position 145 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
AlphaMissense	Uncertain	0.42
BayesDel_addAF	Benign	-0.15	T
BayesDel_noAF	Benign	-0.46
CADD	Benign	21
DANN	Uncertain	0.99
DEOGEN2	Benign	0.039	T
Eigen	Benign	-0.24
Eigen_PC	Benign	-0.33
FATHMM_MKL	Benign	0.097	N
LIST_S2	Benign	0.51	T
M_CAP	Benign	0.023	T
MetaRNN	Benign	0.15	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	2.0	M
PrimateAI	Benign	0.30	T
PROVEAN	Uncertain	-2.4	N
REVEL	Benign	0.065
Sift	Benign	0.039	D
Sift4G	Benign	0.061	T
Polyphen		0.86	P
Vest4		0.32
MutPred		0.42		Loss of methylation at K145 (P = 0.0096);
MVP		0.23
ClinPred		0.57	D
GERP RS		0.46
Varity_R		0.11
gMVP		0.34

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr10-50340076;