4-55396204-T-C

Variant summary

Our verdict is Benign. Variant got -11 ACMG points: 2P and 13B. PM2 BP4_Strong BP6_Very_Strong BP7

The NM_018475.5(TMEM165):c.15T>C(p.Ala5=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000487 in 1,437,208 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 32)
  • Exomes 𝑓: 0.0000047 (0 hom.)
• Consequence: TMEM165 NM_018475.5 synonymous
• Clinical Significance: Likely benign criteria provided, multiple submitters, no conflicts B:3
• Conservation: PhyloP100: 0.952

Genes affected

TMEM165 (HGNC:30760): (transmembrane protein 165) This gene encodes a predicted transmembrane protein with a perinuclear Golgi-like distribution in fibroblasts. Mutations in this gene are associated with the autosomal recessive disorder congenital disorder of glycosylation, type IIk. Knockdown of this gene's expression causes decreased sialylation in HEK cells and suggests this gene plays a role in terminal Golgi glycosylation. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jul 2012]

ACMG classification

Verdict is Benign. Variant got -11 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.83).
• BP6: Variant 4-55396204-T-C is Benign according to our data. Variant chr4-55396204-T-C is described in ClinVar as [Likely_benign]. Clinvar id is 513171.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BP7: Synonymous conserved (PhyloP=0.952 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TMEM165	NM_018475.5	c.15T>C	p.Ala5=	synonymous_variant	1/6	ENST00000381334.10
TMEM165	XM_011534394.4	c.15T>C	p.Ala5=	synonymous_variant	1/6
TMEM165	XM_017008412.2	c.-431T>C		5_prime_UTR_variant	1/8
TMEM165	NR_073070.2	n.248T>C		non_coding_transcript_exon_variant	1/7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TMEM165	ENST00000381334.10	c.15T>C	p.Ala5=	synonymous_variant	1/6	1	NM_018475.5	P1
TMEM165	ENST00000506198.5	c.15T>C	p.Ala5=	synonymous_variant	1/3	2
TMEM165	ENST00000508404.5	c.15T>C	p.Ala5=	synonymous_variant, NMD_transcript_variant	1/7	2
TMEM165	ENST00000514070.1			upstream_gene_variant		2

Frequencies

GnomAD3 genomes AF: 0.00000659 AC: 1 AN: 151752 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000656

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: 0.00

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.0000141 AC: 1 AN: 71122 Hom.: 0 AF XY: 0.00 AC XY: 0 AN XY: 41410

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000809

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: 0.00000467 AC: 6 AN: 1285456 Hom.: 0 Cov.: 29 AF XY: 0.00000475 AC XY: 3 AN XY: 632168

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000437

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.0000617

Gnomad4 NFE exome AF: 0.00000194

Gnomad4 OTH exome AF: 0.0000188

GnomAD4 genome AF: 0.00000659 AC: 1 AN: 151752 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 74118

Gnomad4 AFR AF: 0.00

Gnomad4 AMR AF: 0.0000656

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.00

Gnomad4 OTH AF: 0.00

Bravo AF: 0.00000756

ClinVar

Significance: Likely benign

Submissions summary: Benign:3

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not specified Benign:1

Likely benign, criteria provided, single submitter

clinical testing

GeneDx

Nov 30, 2017

This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -

TMEM165-related disorder Benign:1

Likely benign, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

Apr 29, 2020

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

TMEM165-congenital disorder of glycosylation Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Invitae

Oct 06, 2023

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.83
Cadd	Benign	13
Dann	Benign	0.30

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: rs764693617; hg19: chr4-56262371;