Genetic Variant TCHH:p.Glu1831Gln (chr1-152107726-C-G) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_007113.4(TCHH):c.5491G>C(p.Glu1831Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,886 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. E1831K) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

TCHH
NM_007113.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -0.108

Publications

0 publications found

Variant links:

Genes affected

TCHH (HGNC:11791): (trichohyalin) The protein encoded by this gene forms crosslinked complexes with itself and keratin intermediate filaments to provide mechanical strength to the hair follicle inner root sheath. The encoded protein also is important for structural integrity of the filiform papillae of the tongue. Defects in this gene are a cause of uncombable hair syndrome. [provided by RefSeq, Feb 2017]

TCHH Gene-Disease associations (from GenCC):

uncombable hair syndrome 3
Inheritance: AR Classification: LIMITED Submitted by: PanelApp Australia, G2P

TCHH links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.07647768).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_007113.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TCHH	NM_007113.4	MANE Select	c.5491G>C	p.Glu1831Gln	missense	Exon 3 of 3	NP_009044.2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TCHH	ENST00000614923.2	TSL:5 MANE Select	c.5491G>C	p.Glu1831Gln	missense	Exon 3 of 3	ENSP00000480484.1	Q07283

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461886

Hom.:

Cov.:

110

AF XY:

0.00000138

AC XY:

AN XY:

727246

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33480

American (AMR)

AF:

0.00

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.0000116

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53412

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1112012

Other (OTH)

AF:

0.00

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.18

BayesDel_addAF

Benign

-0.34

BayesDel_noAF

Benign

-0.73

CADD

Benign

1.9

(source)

DANN

Benign

0.49

DEOGEN2

Benign

0.0016

Eigen

Benign

-1.5

Eigen_PC

Benign

-1.6

FATHMM_MKL

Benign

0.042

LIST_S2

Benign

0.31

M_CAP

Benign

0.0034

MetaRNN

Benign

0.076

MetaSVM

Benign

-0.92

MutationAssessor

Benign

1.1

PhyloP100

-0.11

PrimateAI

Benign

0.28

PROVEAN

Benign

-0.59

REVEL

Benign

0.038

Sift

Benign

0.048

Sift4G

Uncertain

0.048

Polyphen

0.41

Vest4

0.11

MutPred

0.18

Gain of MoRF binding (P = 0.0438)

MVP

0.35

MPC

0.42

ClinPred

0.12

GERP RS

-0.22

Varity_R

0.046

gMVP

0.0074

Mutation Taster

=99/1

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.030

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over