Genetic Variant TDRD9:p.Ala67Val (chr14-103928709-C-T) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_153046.3(TDRD9):c.200C>T(p.Ala67Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000341 in 1,171,750 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 31)

Exomes 𝑓: 0.0000020 ( 0 hom. )

Consequence

TDRD9
NM_153046.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.693

Publications

0 publications found

Variant links:

Genes affected

TDRD9 (HGNC:20122): (tudor domain containing 9) Predicted to enable RNA binding activity. Involved in spermatogenesis. Located in cytoplasm and nucleus. Implicated in spermatogenic failure 30. [provided by Alliance of Genome Resources, Apr 2022]

TDRD9 Gene-Disease associations (from GenCC):

spermatogenic failure 30
Inheritance: AR Classification: STRONG, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics
male infertility with azoospermia or oligozoospermia due to single gene mutation
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

TDRD9 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.05809498).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TDRD9	NM_153046.3 link	c.200C>T	p.Ala67Val	missense_variant	Exon 1 of 36	ENST00000409874.9	NP_694591.2	Q8NDG6-1Q86WA0

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TDRD9	ENST00000409874.9 link	c.200C>T	p.Ala67Val	missense_variant	Exon 1 of 36	5	NM_153046.3	ENSP00000387303.4		Q8NDG6-1
TDRD9	ENST00000496087.5 link	n.-108C>T		upstream_gene_variant		4

Frequencies

GnomAD3 genomes

AF:

0.0000133

AC:

AN:

150856

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000485

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00000196

AC:

AN:

1020894

Hom.:

Cov.:

AF XY:

0.00000207

AC XY:

AN XY:

482732

show subpopulations

African (AFR)

AF:

0.0000981

AC:

AN:

20392

American (AMR)

AF:

0.00

AC:

AN:

6772

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

11762

East Asian (EAS)

AF:

0.00

AC:

AN:

21478

South Asian (SAS)

AF:

0.00

AC:

AN:

19952

European-Finnish (FIN)

AF:

0.00

AC:

AN:

26632

Middle Eastern (MID)

AF:

0.00

AC:

AN:

2600

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

871966

Other (OTH)

AF:

0.00

AC:

AN:

39340

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.525

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.0000133

AC:

AN:

150856

Hom.:

Cov.:

AF XY:

0.0000136

AC XY:

AN XY:

73632

show subpopulations

African (AFR)

AF:

0.0000485

AC:

AN:

41232

American (AMR)

AF:

0.00

AC:

AN:

15158

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3466

East Asian (EAS)

AF:

0.00

AC:

AN:

5018

South Asian (SAS)

AF:

0.00

AC:

AN:

4806

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10190

Middle Eastern (MID)

AF:

0.00

AC:

AN:

310

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

67688

Other (OTH)

AF:

0.00

AC:

AN:

2078

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

Alfa

AF:

0.00

Hom.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

May 13, 2025

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.200C>T (p.A67V) alteration is located in exon 1 (coding exon 1) of the TDRD9 gene. This alteration results from a C to T substitution at nucleotide position 200, causing the alanine (A) at amino acid position 67 to be replaced by a valine (V). 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

0.11

BayesDel_addAF

Benign

-0.36

BayesDel_noAF

Benign

-0.75

CADD

Benign

4.2

(source)

DANN

Benign

0.95

DEOGEN2

Benign

0.028

Eigen

Benign

-1.2

Eigen_PC

Benign

-1.2

FATHMM_MKL

Benign

0.040

LIST_S2

Benign

0.36

M_CAP

Benign

0.063

MetaRNN

Benign

0.058

MetaSVM

Benign

-0.91

MutationAssessor

Benign

0.69

PhyloP100

-0.69

PrimateAI

Uncertain

0.57

PROVEAN

Benign

-0.52

REVEL

Benign

0.014

Sift

Benign

0.62

Sift4G

Benign

0.16

Polyphen

0.0

Vest4

0.078

MutPred

0.37

Loss of glycosylation at P66 (P = 0.0703);

MVP

0.040

MPC

0.21

ClinPred

0.051

GERP RS

-1.4

PromoterAI

-0.027

Neutral

(source)

Varity_R

0.039

gMVP

0.24

Mutation Taster

=97/3

polymorphism

(source)

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

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14-103928709-C-T

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over