6-87337120-C-T

Variant summary

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

The NM_001042493.3(SMIM8):c.89C>T(p.Thr30Ile) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: SMIM8 NM_001042493.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.03

Genes affected

SMIM8 (HGNC:21401): (small integral membrane protein 8) Predicted to be integral component of membrane. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SMIM8	NM_001042493.3	c.89C>T	p.Thr30Ile	missense_variant	3/4	ENST00000392863.6
SMIM8	NM_020425.6	c.89C>T	p.Thr30Ile	missense_variant	2/3
SMIM8	NM_001287445.2	c.89C>T	p.Thr30Ile	missense_variant	2/3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SMIM8	ENST00000392863.6	c.89C>T	p.Thr30Ile	missense_variant	3/4	1	NM_001042493.3	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

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

Sep 14, 2023

The c.89C>T (p.T30I) alteration is located in exon 3 (coding exon 1) of the SMIM8 gene. This alteration results from a C to T substitution at nucleotide position 89, causing the threonine (T) at amino acid position 30 to be replaced by an isoleucine (I). 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	Pathogenic	0.87
BayesDel_addAF	Pathogenic	0.42	D
BayesDel_noAF	Pathogenic	0.37
Cadd	Pathogenic	27
Dann	Pathogenic	1.0
DEOGEN2	Benign	0.21	T;T;T;T;T
Eigen	Uncertain	0.64
Eigen_PC	Uncertain	0.63
FATHMM_MKL	Pathogenic	0.99	D
M_CAP	Benign	0.080	D
MetaRNN	Uncertain	0.53	D;D;D;D;D
MetaSVM	Uncertain	-0.032	T
MutationTaster	Benign	1.0	D;D
PrimateAI	Uncertain	0.55	T
Sift4G	Uncertain	0.0060	D;D;D;D;D
Polyphen		1.0	D;D;D;.;D
Vest4		0.57
MutPred		0.29		Gain of sheet (P = 0.0221);Gain of sheet (P = 0.0221);Gain of sheet (P = 0.0221);Gain of sheet (P = 0.0221);Gain of sheet (P = 0.0221);
MVP		0.11
MPC		0.18
ClinPred		0.99	D
GERP RS		5.9
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.60
gMVP		0.84

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.070		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: chr6-88046838;