chr4-55396270-C-T

Variant names:

• chr4-55396270-C-T
• NM_018475.5:c.81C>T

Variant summary

Our verdict is Likely benign. Variant got -5 ACMG points: 2P and 7B. PM2 BP4_Strong BP6_Moderate BP7

The NM_018475.5(TMEM165):​c.81C>T​(p.Ala27Ala) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000365 in 1,368,978 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: not found (cov: 33)
  • Exomes 𝑓: 0.0000037 (0 hom.)
• Consequence: TMEM165 NM_018475.5 synonymous
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -0.172

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 Likely_benign. Variant got -5 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.74).
• BP6: Variant 4-55396270-C-T is Benign according to our data. Variant chr4-55396270-C-T is described in ClinVar as [Likely_benign]. Clinvar id is 3694474.Status of the report is criteria_provided_single_submitter, 1 stars.
• BP7: Synonymous conserved (PhyloP=-0.172 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TMEM165	NM_018475.5	c.81C>T	p.Ala27Ala	synonymous_variant	Exon 1 of 6	ENST00000381334.10	NP_060945.2
TMEM165	XM_011534394.4	c.81C>T	p.Ala27Ala	synonymous_variant	Exon 1 of 6		XP_011532696.1
TMEM165	XM_017008412.2	c.-365C>T		5_prime_UTR_variant	Exon 1 of 8		XP_016863901.1
TMEM165	NR_073070.2	n.314C>T		non_coding_transcript_exon_variant	Exon 1 of 7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TMEM165	ENST00000381334.10	c.81C>T	p.Ala27Ala	synonymous_variant	Exon 1 of 6	1	NM_018475.5	ENSP00000370736.5
TMEM165	ENST00000506198.5	c.81C>T	p.Ala27Ala	synonymous_variant	Exon 1 of 3	2		ENSP00000425449.1
TMEM165	ENST00000508404.5	n.81C>T		non_coding_transcript_exon_variant	Exon 1 of 7	2		ENSP00000422639.1
TMEM165	ENST00000514070.1	n.20C>T		non_coding_transcript_exon_variant	Exon 1 of 2	2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000365 AC: 5 AN: 1368978 Hom.: 0 Cov.: 34 AF XY: 0.00000295 AC XY: 2 AN XY: 677310

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: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000466

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

TMEM165-congenital disorder of glycosylation Benign:1

Oct 30, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.74
CADD	Benign	13
DANN	Benign	0.76
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1

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: chr4-56262437;