12-109908917-C-G

Variant names:

• chr12-109908917-C-G
• rs753183741
• NM_001143852.2:c.859C>G

Variant summary

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

The NM_001143852.2(TCHP):​c.859C>G​(p.Gln287Glu) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: TCHP NM_001143852.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.24

Genes affected

TCHP (HGNC:28135): (trichoplein keratin filament binding) Involved in apoptotic process; negative regulation of cell growth; and negative regulation of cilium assembly. Located in several cellular components, including apical cortex; cytoskeleton; and mitochondrion. [provided by Alliance of Genome Resources, Apr 2022]

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=0.2584828).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TCHP	NM_001143852.2	c.859C>G	p.Gln287Glu	missense_variant	Exon 8 of 13	ENST00000405876.9	NP_001137324.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TCHP	ENST00000405876.9	c.859C>G	p.Gln287Glu	missense_variant	Exon 8 of 13	1	NM_001143852.2	ENSP00000384520.4
TCHP	ENST00000312777.9	c.859C>G	p.Gln287Glu	missense_variant	Exon 8 of 13	1		ENSP00000324404.5
TCHP	ENST00000544838.5	n.859C>G		non_coding_transcript_exon_variant	Exon 8 of 15	2		ENSP00000440838.1
TCHP	ENST00000549550.1	n.103C>G		non_coding_transcript_exon_variant	Exon 1 of 4	3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.00000398 AC: 1 AN: 251382 Hom.: 0 AF XY: 0.00 AC XY: 0 AN XY: 135864

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

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: 0.00000880

Gnomad OTH exome AF: 0.00

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000378

ExAC AF: 0.00000824 AC: 1

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Dec 05, 2022

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.859C>G (p.Q287E) alteration is located in exon 8 (coding exon 7) of the TCHP gene. This alteration results from a C to G substitution at nucleotide position 859, causing the glutamine (Q) at amino acid position 287 to be replaced by a glutamic acid (E). 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	0.10
BayesDel_addAF	Benign	-0.13	T
BayesDel_noAF	Benign	-0.42
CADD	Uncertain	25
DANN	Uncertain	0.99
DEOGEN2	Benign	0.13	T;T
Eigen	Uncertain	0.27
Eigen_PC	Uncertain	0.35
FATHMM_MKL	Uncertain	0.93	D
LIST_S2	Benign	0.83	.;T
M_CAP	Benign	0.010	T
MetaRNN	Benign	0.26	T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Uncertain	2.2	M;M
PrimateAI	Benign	0.45	T
PROVEAN	Benign	-1.5	N;N
REVEL	Benign	0.095
Sift	Benign	0.057	T;T
Sift4G	Benign	0.61	T;T
Polyphen		0.52	P;P
Vest4		0.44
MutPred		0.21		Loss of MoRF binding (P = 0.0427);Loss of MoRF binding (P = 0.0427);
MVP		0.25
MPC		0.32
ClinPred		0.74	D
GERP RS		5.4
Varity_R		0.25
gMVP		0.040

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: rs753183741; hg19: chr12-110346722;