17-79944958-G-A

Position:

• chr17-79944958-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2 PP3

The NM_019020.4(TBC1D16):​c.1858C>T​(p.Pro620Ser) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000712 in 1,404,580 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 7.1e-7 (0 hom.)
• Consequence: TBC1D16 NM_019020.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.64

Genes affected

TBC1D16 (HGNC:28356): (TBC1 domain family member 16) Enables GTPase activator activity. Involved in regulation of receptor recycling. Located in cytosol and early endosome. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Uncertain_significance. Variant got 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.763

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TBC1D16	NM_019020.4	c.1858C>T	p.Pro620Ser	missense_variant	10/12	ENST00000310924.7	NP_061893.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
TBC1D16	ENST00000310924.7	c.1858C>T	p.Pro620Ser	missense_variant	10/12	1	NM_019020.4	ENSP00000309794	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 7.12e-7 AC: 1 AN: 1404580 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 693260

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: 0.0000126

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

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

Oct 27, 2021

The c.1858C>T (p.P620S) alteration is located in exon 10 (coding exon 9) of the TBC1D16 gene. This alteration results from a C to T substitution at nucleotide position 1858, causing the proline (P) at amino acid position 620 to be replaced by a serine (S). 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	0.13
BayesDel_addAF	Pathogenic	0.21	D
BayesDel_noAF	Uncertain	0.070
CADD	Uncertain	25
DANN	Uncertain	0.99
DEOGEN2	Benign	0.19	T;.;.;.;T
Eigen	Uncertain	0.34
Eigen_PC	Uncertain	0.41
FATHMM_MKL	Uncertain	0.94	D
LIST_S2	Uncertain	0.88	D;D;D;D;D
M_CAP	Benign	0.018	T
MetaRNN	Pathogenic	0.76	D;D;D;D;D
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	0.90	L;.;.;.;.
MutationTaster	Benign	1.0	D;D;D;D;D
PrimateAI	Uncertain	0.77	T
PROVEAN	Uncertain	-4.0	D;.;D;.;.
REVEL	Uncertain	0.46
Sift	Benign	0.076	T;.;T;.;.
Sift4G	Benign	0.18	T;T;T;T;T
Polyphen		0.44	B;.;.;.;.
Vest4		0.66
MutPred		0.72		Gain of phosphorylation at P620 (P = 0.0658);.;.;.;.;
MVP		0.70
MPC		1.6
ClinPred		0.99	D
GERP RS		5.1
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.25
gMVP		0.73

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: chr17-77918757; COSMIC: COSV104596830; COSMIC: COSV104596830;