rs779856268

Variant names:

• chr5-137948976-C-A
• rs779856268
• NM_001385994.1:c.2139G>T

Your query was ambiguous. Multiple possible variants found:

• chr5-137948976-C-A
• chr5-137948976-C-T

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_001385994.1(FAM13B):​c.2139G>T​(p.Arg713Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000248 in 1,613,386 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 32)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: FAM13B NM_001385994.1 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.966
• Publications: 0 publications found

Genes affected

FAM13B (HGNC:1335): (family with sequence similarity 13 member B) Predicted to enable GTPase activator activity. Predicted to be involved in regulation of small GTPase mediated signal transduction. Predicted to be located in cytosol. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.064331055).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001385994.1. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	FAM13B	NM_001385994.1	MANE Select	c.2139G>T	p.Arg713Ser	missense	Exon 18 of 24	NP_001372923.1	A0A8I5KSB9
	FAM13B	NM_001385921.1		c.2073G>T	p.Arg691Ser	missense	Exon 18 of 24	NP_001372850.1	A0A2X0SG06
	FAM13B	NM_016603.4		c.2073G>T	p.Arg691Ser	missense	Exon 17 of 23	NP_057687.2	A0A2X0SG06

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	FAM13B	ENST00000689681.1	MANE Select	c.2139G>T	p.Arg713Ser	missense	Exon 18 of 24	ENSP00000509788.1	A0A8I5KSB9
	FAM13B	ENST00000033079.7	TSL:1	c.2073G>T	p.Arg691Ser	missense	Exon 17 of 23	ENSP00000033079.3	Q9NYF5-1
	FAM13B	ENST00000420893.6	TSL:1	c.2073G>T	p.Arg691Ser	missense	Exon 17 of 22	ENSP00000388521.2	Q9NYF5-2

Frequencies

GnomAD3 genomes AF: 0.00000657 AC: 1 AN: 152118 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

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

GnomAD2 exomes AF: 0.00000398 AC: 1 AN: 251060 AF XY: 0.00

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000289

Gnomad ASJ exome AF: 0.00

Gnomad EAS 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: 0.00000205 AC: 3 AN: 1461268 Hom.: 0 Cov.: 31 AF XY: 0.00000275 AC XY: 2 AN XY: 727010

African (AFR) AF: 0.00 AC: 0 AN: 33456

American (AMR) AF: 0.0000224 AC: 1 AN: 44708

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26128

East Asian (EAS) AF: 0.00 AC: 0 AN: 39678

South Asian (SAS) AF: 0.00 AC: 0 AN: 86248

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53080

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5766

European-Non Finnish (NFE) AF: 0.00000180 AC: 2 AN: 1111816

Other (OTH) AF: 0.00 AC: 0 AN: 60388

GnomAD4 genome AF: 0.00000657 AC: 1 AN: 152118 Hom.: 0 Cov.: 32 AF XY: 0.0000135 AC XY: 1 AN XY: 74314

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 41428

American (AMR) AF: 0.0000654 AC: 1 AN: 15280

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3466

East Asian (EAS) AF: 0.00 AC: 0 AN: 5192

South Asian (SAS) AF: 0.00 AC: 0 AN: 4824

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10598

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 68014

Other (OTH) AF: 0.00 AC: 0 AN: 2088

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5. (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.39
BayesDel_addAF	Benign	-0.26	T
BayesDel_noAF	Benign	-0.52
CADD	Benign	17
DANN	Benign	0.96
DEOGEN2	Benign	0.039	T
Eigen	Benign	-0.65
Eigen_PC	Benign	-0.64
FATHMM_MKL	Benign	0.16	N
LIST_S2	Benign	0.73	T
M_CAP	Benign	0.0078	T
MetaRNN	Benign	0.064	T
MetaSVM	Benign	-0.98	T
MutationAssessor	Benign	0.60	N
PhyloP100		-0.97
PrimateAI	Benign	0.40	T
PROVEAN	Benign	-0.96	N
REVEL	Benign	0.075
Sift	Benign	1.0	T
Sift4G	Benign	0.73	T
Polyphen		0.32	B
Vest4		0.43
MutPred		0.31		Gain of phosphorylation at R691 (P = 0.0037)
MVP		0.17
MPC		0.53
ClinPred		0.70	D
GERP RS		-1.7
RBP_binding_hub_radar		0.97
RBP_regulation_power_radar		2.7
Varity_R		0.068
gMVP		0.24
Mutation Taster		=93/7	polymorphism

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

Other links and lift over

dbSNP: rs779856268; hg19: chr5-137284665;