4-140627524-G-A

Position:

• chr4-140627524-G-A

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_015130.3(TBC1D9):​c.2816C>T​(p.Pro939Leu) variant causes a missense change. The variant allele was found at a frequency of 0.000000689 in 1,451,048 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 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: 6.9e-7 (0 hom.)
• Consequence: TBC1D9 NM_015130.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.57

Genes affected

TBC1D9 (HGNC:21710): (TBC1 domain family member 9) Predicted to enable GTPase activator activity. Predicted to be involved in activation of GTPase activity and intracellular protein transport. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.053631335).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TBC1D9	NM_015130.3	c.2816C>T	p.Pro939Leu	missense_variant	18/21	ENST00000442267.3	NP_055945.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
TBC1D9	ENST00000442267.3	c.2816C>T	p.Pro939Leu	missense_variant	18/21	1	NM_015130.3	ENSP00000411197	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.89e-7 AC: 1 AN: 1451048 Hom.: 0 Cov.: 27 AF XY: 0.00 AC XY: 0 AN XY: 721676

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000118

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

Dec 13, 2022

The c.2816C>T (p.P939L) alteration is located in exon 18 (coding exon 18) of the TBC1D9 gene. This alteration results from a C to T substitution at nucleotide position 2816, causing the proline (P) at amino acid position 939 to be replaced by a leucine (L). 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	0.065
BayesDel_addAF	Benign	-0.20	T
BayesDel_noAF	Benign	-0.53
CADD	Benign	22
DANN	Benign	0.60
DEOGEN2	Benign	0.044	T
Eigen	Benign	-0.28
Eigen_PC	Benign	-0.013
FATHMM_MKL	Uncertain	0.89	D
LIST_S2	Uncertain	0.86	D
M_CAP	Benign	0.0043	T
MetaRNN	Benign	0.054	T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	0.55	N
MutationTaster	Benign	1.0	D
PrimateAI	Uncertain	0.71	T
PROVEAN	Benign	2.2	N
REVEL	Benign	0.075
Sift	Benign	0.82	T
Sift4G	Benign	0.73	T
Polyphen		0.0	B
Vest4		0.10
MutPred		0.27		Loss of glycosylation at P939 (P = 0.0317);
MVP		0.043
MPC		0.50
ClinPred		0.86	D
GERP RS		4.9
Varity_R		0.081
gMVP		0.21

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: chr4-141548678;