17-997174-C-G

Variant names:

• chr17-997174-C-G
• rs755945979
• NM_013337.4:c.32C>G

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_013337.4(TIMM22):​c.32C>G​(p.Ser11Trp) 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. 12/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 32)
• Consequence: TIMM22 NM_013337.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.44

Genes affected

TIMM22 (HGNC:17317): (translocase of inner mitochondrial membrane 22) Multipass transmembrane proteins are brought into mitochondria and inserted into the mitochondrial inner membrane by way of the TIM22 complex. This complex has six subunits and is a twin-pore translocase. The protein encoded by this gene is a subunit of TIM22 and represents the voltage-activated and signal-gated channel. [provided by RefSeq, Jul 2016]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.2669854).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TIMM22	NM_013337.4	c.32C>G	p.Ser11Trp	missense_variant	Exon 1 of 4	ENST00000327158.5	NP_037469.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TIMM22	ENST00000327158.5	c.32C>G	p.Ser11Trp	missense_variant	Exon 1 of 4	1	NM_013337.4	ENSP00000320236.2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000756

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.15
BayesDel_addAF	Benign	-0.073	T
BayesDel_noAF	Benign	-0.34
CADD	Benign	23
DANN	Uncertain	0.98
DEOGEN2	Benign	0.064	T
Eigen	Benign	0.028
Eigen_PC	Benign	-0.065
FATHMM_MKL	Benign	0.55	D
M_CAP	Uncertain	0.18	D
MetaRNN	Benign	0.27	T
MetaSVM	Benign	-0.86	T
MutationAssessor	Benign	1.8	L
PrimateAI	Uncertain	0.69	T
PROVEAN	Benign	-2.3	N
REVEL	Benign	0.17
Sift	Uncertain	0.0060	D
Sift4G	Uncertain	0.0070	D
Polyphen		0.98	D
Vest4		0.39
MutPred		0.28		Loss of glycosylation at S11 (P = 0.0018);
MVP		0.40
MPC		0.20
ClinPred		0.66	D
GERP RS		5.4
Varity_R		0.13
gMVP		0.36

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: rs755945979; hg19: chr17-900414; COSMIC: COSV105231702;