9-98199433-C-T

Variant names:

• chr9-98199433-C-T
• rs757114027
• NM_001267571.2:c.2735G>A

Variant summary

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

The NM_001267571.2(TBC1D2):​c.2735G>A​(p.Arg912Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000929 in 1,613,864 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.000013 (0 hom., cov: 32)
  • Exomes 𝑓: 0.0000089 (0 hom.)
• Consequence: TBC1D2 NM_001267571.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.19
• Publications: 0 publications found

Genes affected

TBC1D2 (HGNC:18026): (TBC1 domain family member 2) Enables GTPase activator activity and cadherin binding activity. Involved in positive regulation of GTPase activity. Located in several cellular components, including cytoplasmic vesicle; cytosol; and nucleoplasm. [provided by Alliance of Genome Resources, Apr 2022]

ENSG00000299446 (HGNC:):

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=0.060245216).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001267571.2. 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
	TBC1D2	NM_001267571.2	MANE Select	c.2735G>A	p.Arg912Lys	missense	Exon 13 of 13	NP_001254500.1	Q9BYX2-1
	TBC1D2	NM_018421.4		c.2702G>A	p.Arg901Lys	missense	Exon 13 of 13	NP_060891.3	Q9BYX2-2
	TBC1D2	NM_001267572.1		c.1355G>A	p.Arg452Lys	missense	Exon 7 of 7	NP_001254501.1	Q9BYX2-6

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TBC1D2	ENST00000465784.7	TSL:1 MANE Select	c.2735G>A	p.Arg912Lys	missense	Exon 13 of 13	ENSP00000481721.1	Q9BYX2-1
	TBC1D2	ENST00000375066.6	TSL:1	c.2702G>A	p.Arg901Lys	missense	Exon 13 of 13	ENSP00000364207.5	Q9BYX2-2
	TBC1D2	ENST00000375063.5	TSL:1	c.1355G>A	p.Arg452Lys	missense	Exon 7 of 7	ENSP00000364203.1	Q9BYX2-6

Frequencies

GnomAD3 genomes AF: 0.0000131 AC: 2 AN: 152210 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000241

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

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: 0.0000147

Gnomad OTH AF: 0.00

GnomAD4 exome AF: 0.00000889 AC: 13 AN: 1461654 Hom.: 0 Cov.: 31 AF XY: 0.00000825 AC XY: 6 AN XY: 727134

African (AFR) AF: 0.00 AC: 0 AN: 33470

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26132

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

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

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53340

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5682

European-Non Finnish (NFE) AF: 0.0000117 AC: 13 AN: 1111988

Other (OTH) AF: 0.00 AC: 0 AN: 60370

GnomAD4 genome AF: 0.0000131 AC: 2 AN: 152210 Hom.: 0 Cov.: 32 AF XY: 0.0000269 AC XY: 2 AN XY: 74358

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

African (AFR) AF: 0.0000241 AC: 1 AN: 41462

American (AMR) AF: 0.00 AC: 0 AN: 15284

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

East Asian (EAS) AF: 0.00 AC: 0 AN: 5188

South Asian (SAS) AF: 0.00 AC: 0 AN: 4830

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10626

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

European-Non Finnish (NFE) AF: 0.0000147 AC: 1 AN: 68036

Other (OTH) AF: 0.00 AC: 0 AN: 2090

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5. (p-value = 0.00233887), which strongly suggests a high chance of mosaicism in these individuals.

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000756

TwinsUK AF: 0.00 AC: 0

ALSPAC AF: 0.000259 AC: 1

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	Benign	0.087
BayesDel_addAF	Benign	-0.32	T
BayesDel_noAF	Benign	-0.70
CADD	Benign	7.7
DANN	Benign	0.90
DEOGEN2	Benign	0.0031	T
Eigen	Benign	-1.0
Eigen_PC	Benign	-1.0
FATHMM_MKL	Benign	0.035	N
LIST_S2	Benign	0.61	T
M_CAP	Benign	0.0084	T
MetaRNN	Benign	0.060	T
MetaSVM	Benign	-0.92	T
MutationAssessor	Benign	1.8	L
PhyloP100		1.2
PrimateAI	Benign	0.28	T
PROVEAN	Benign	0.24	N
REVEL	Benign	0.027
Sift	Benign	0.37	T
Sift4G	Benign	0.55	T
Polyphen		0.013	B
Vest4		0.089
MutPred		0.27		Gain of ubiquitination at R912 (P = 0.0048)
MVP		0.26
MPC		0.30
ClinPred		0.12	T
GERP RS		2.7
Varity_R		0.036
gMVP		0.18
Mutation Taster		=95/5	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: rs757114027; hg19: chr9-100961715;