chr14-77343801-T-G

Position:

• chr14-77343801-T-G

Variant summary

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

The ENST00000216468.8(TMED8):​c.350A>C​(p.Gln117Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000274 in 1,461,556 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 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: 0.0000027 (0 hom.)
• Consequence: TMED8 ENST00000216468.8 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.30

Genes affected

TMED8 (HGNC:18633): (transmembrane p24 trafficking protein family member 8)

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=0.13070175).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TMED8	NM_213601.3	c.350A>C	p.Gln117Pro	missense_variant	4/6	ENST00000216468.8	NP_998766.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
TMED8	ENST00000216468.8	c.350A>C	p.Gln117Pro	missense_variant	4/6	1	NM_213601.3	ENSP00000216468	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.00000398 AC: 1 AN: 251304 Hom.: 0 AF XY: 0.00 AC XY: 0 AN XY: 135804

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 SAS 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: 0.00000274 AC: 4 AN: 1461556 Hom.: 0 Cov.: 31 AF XY: 0.00000138 AC XY: 1 AN XY: 727034

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000895

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000378

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

Jan 19, 2024

The c.350A>C (p.Q117P) alteration is located in exon 4 (coding exon 4) of the TMED8 gene. This alteration results from a A to C substitution at nucleotide position 350, causing the glutamine (Q) at amino acid position 117 to be replaced by a proline (P). 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	0.068
BayesDel_addAF	Benign	-0.19	T
BayesDel_noAF	Benign	-0.43
CADD	Benign	21
DANN	Uncertain	0.99
DEOGEN2	Benign	0.020	T
Eigen	Benign	-0.32
Eigen_PC	Benign	-0.16
FATHMM_MKL	Uncertain	0.90	D
LIST_S2	Benign	0.69	T
M_CAP	Benign	0.0055	T
MetaRNN	Benign	0.13	T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	1.4	L
MutationTaster	Benign	1.0	N
PrimateAI	Benign	0.30	T
PROVEAN	Benign	-1.8	N
REVEL	Benign	0.068
Sift	Uncertain	0.012	D
Sift4G	Benign	0.18	T
Polyphen		0.0010	B
Vest4		0.32
MutPred		0.35		Gain of catalytic residue at P116 (P = 0);
MVP		0.42
MPC		0.29
ClinPred		0.29	T
GERP RS		4.8
Varity_R		0.20
gMVP		0.77

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

LitVar

Other links and lift over

dbSNP: rs1368249443; hg19: chr14-77810144;