3-180604857-G-C

Variant names:

• chr3-180604857-G-C
• rs374767337
• NM_133462.4:c.707G>C

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2 BP4

The NM_133462.4(TTC14):​c.707G>C​(p.Ser236Thr) variant causes a missense change. The variant allele was found at a frequency of 0.00000344 in 1,453,590 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. S236N) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000034 (0 hom.)
• Consequence: TTC14 NM_133462.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 6.89
• Publications: 0 publications found

Genes affected

TTC14 (HGNC:24697): (tetratricopeptide repeat domain 14) Predicted to enable nucleic acid binding activity. [provided by Alliance of Genome Resources, Apr 2022]

CCDC39 (HGNC:25244): (coiled-coil domain 39 molecular ruler complex subunit) The protein encoded by this gene is involved in the motility of cilia and flagella. The encoded protein is essential for the assembly of dynein regulatory and inner dynein arm complexes, which regulate ciliary beat. Defects in this gene are a cause of primary ciliary dyskinesia type 14 (CILD14). [provided by RefSeq, Jul 2011]

CCDC39 Gene-Disease associations (from GenCC):

• primary ciliary dyskinesia 14

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: G2P, ClinGen, Labcorp Genetics (formerly Invitae)
• primary ciliary dyskinesia

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.40070283).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_133462.4. 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
	TTC14	NM_133462.4	MANE Select	c.707G>C	p.Ser236Thr	missense	Exon 6 of 12	NP_597719.1	Q96N46-1
	TTC14	NM_001288582.2		c.707G>C	p.Ser236Thr	missense	Exon 6 of 13	NP_001275511.1	Q96N46-2
	TTC14	NM_001042601.3		c.707G>C	p.Ser236Thr	missense	Exon 6 of 10	NP_001036066.1	Q96N46-3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TTC14	ENST00000296015.9	TSL:1 MANE Select	c.707G>C	p.Ser236Thr	missense	Exon 6 of 12	ENSP00000296015.4	Q96N46-1
	TTC14	ENST00000382584.8	TSL:1	c.707G>C	p.Ser236Thr	missense	Exon 6 of 13	ENSP00000372027.4	Q96N46-2
	TTC14	ENST00000412756.6	TSL:1	c.707G>C	p.Ser236Thr	missense	Exon 6 of 10	ENSP00000413743.2	Q96N46-3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000344 AC: 5 AN: 1453590 Hom.: 0 Cov.: 31 AF XY: 0.00000415 AC XY: 3 AN XY: 723132

African (AFR) AF: 0.00 AC: 0 AN: 32850

American (AMR) AF: 0.00 AC: 0 AN: 42096

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25542

East Asian (EAS) AF: 0.00 AC: 0 AN: 39620

South Asian (SAS) AF: 0.00 AC: 0 AN: 85064

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53298

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5582

European-Non Finnish (NFE) AF: 0.00000451 AC: 5 AN: 1109494

Other (OTH) AF: 0.00 AC: 0 AN: 60044

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.18
BayesDel_addAF	Benign	-0.016	T
BayesDel_noAF	Benign	-0.26
CADD	Uncertain	24
DANN	Uncertain	0.99
DEOGEN2	Benign	0.049	T
Eigen	Pathogenic	0.69
Eigen_PC	Pathogenic	0.69
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Benign	0.77	T
M_CAP	Benign	0.018	T
MetaRNN	Benign	0.40	T
MetaSVM	Benign	-0.62	T
MutationAssessor	Uncertain	2.3	M
PhyloP100		6.9
PrimateAI	Uncertain	0.50	T
PROVEAN	Benign	-1.1	N
REVEL	Benign	0.18
Sift	Benign	0.049	D
Sift4G	Benign	0.088	T
Polyphen		1.0	D
Vest4		0.50
MutPred		0.38		Gain of glycosylation at S236 (P = 0.0012)
MVP		0.69
MPC		0.43
ClinPred		0.88	D
GERP RS		5.9
Varity_R		0.34
gMVP		0.67
Mutation Taster		=79/21	polymorphism

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

Other links and lift over

dbSNP: rs374767337; hg19: chr3-180322645;