chr17-28357792-A-C

Position:

• chr17-28357792-A-C

Variant summary

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

The NM_152464.3(TMEM199):​c.122A>C​(p.Lys41Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 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: 33)
• Consequence: TMEM199 NM_152464.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.35

Genes affected

TMEM199 (HGNC:18085): (transmembrane protein 199) The protein encoded by this gene has been observed to localize to the endoplasmic reticulum (ER)-Golgi intermediate compartment (ERGIC) and coat protein complex I (COPI) in some human cells. The encoded protein shares some homology with the yeast protein Vma12. Defects in this gene are a cause of congenital disorder of glycosylation, type IIp. [provided by RefSeq, Mar 2016]

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=0.123999655).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TMEM199	NM_152464.3	c.122A>C	p.Lys41Thr	missense_variant	1/6	ENST00000292114.8	NP_689677.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
TMEM199	ENST00000292114.8	c.122A>C	p.Lys41Thr	missense_variant	1/6	1	NM_152464.3	ENSP00000292114	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Inborn genetic diseases Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Apr 06, 2024

The c.122A>C (p.K41T) alteration is located in exon 1 (coding exon 1) of the TMEM199 gene. This alteration results from a A to C substitution at nucleotide position 122, causing the lysine (K) at amino acid position 41 to be replaced by a threonine (T). 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	0.084
BayesDel_addAF	Benign	-0.086	T
BayesDel_noAF	Benign	-0.36
CADD	Benign	19
DANN	Benign	0.74
DEOGEN2	Benign	0.0068	T
Eigen	Benign	-0.40
Eigen_PC	Benign	-0.41
FATHMM_MKL	Benign	0.70	D
LIST_S2	Benign	0.83	T
M_CAP	Benign	0.019	T
MetaRNN	Benign	0.12	T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	1.7	L
MutationTaster	Benign	0.99	N;N
PrimateAI	Uncertain	0.61	T
PROVEAN	Benign	-0.88	N
REVEL	Benign	0.11
Sift	Uncertain	0.019	D
Sift4G	Benign	0.39	T
Polyphen		0.61	P
Vest4		0.36
MutPred		0.29		Loss of ubiquitination at K41 (P = 0.0141);
MVP		0.17
MPC		0.27
ClinPred		0.57	D
GERP RS		4.8
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.23
gMVP		0.28

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: rs1908143066; hg19: chr17-26684815;