NM_173550.4:c.188A>T

Variant names:

• chr9-15578859-A-T
• rs376424195
• NM_173550.4:c.188A>T

Variant summary

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

The NM_173550.4(CCDC171):​c.188A>T​(p.Tyr63Phe) 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. 15/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: CCDC171 NM_173550.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.513

Genes affected

CCDC171 (HGNC:29828): (coiled-coil domain containing 171)

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=0.080212325).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CCDC171	NM_173550.4	c.188A>T	p.Tyr63Phe	missense_variant	Exon 4 of 26	ENST00000380701.8	NP_775821.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CCDC171	ENST00000380701.8	c.188A>T	p.Tyr63Phe	missense_variant	Exon 4 of 26	1	NM_173550.4	ENSP00000370077.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

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

Jul 14, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.188A>T (p.Y63F) alteration is located in exon 4 (coding exon 3) of the CCDC171 gene. This alteration results from a A to T substitution at nucleotide position 188, causing the tyrosine (Y) at amino acid position 63 to be replaced by a phenylalanine (F). 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	-0.20	T
BayesDel_noAF	Benign	-0.52
CADD	Benign	12
DANN	Benign	0.84
DEOGEN2	Benign	0.027	T
Eigen	Benign	-0.82
Eigen_PC	Benign	-0.70
FATHMM_MKL	Benign	0.64	D
LIST_S2	Benign	0.76	T
M_CAP	Benign	0.0041	T
MetaRNN	Benign	0.080	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Uncertain	2.3	M
PrimateAI	Benign	0.44	T
PROVEAN	Benign	-0.51	N
REVEL	Benign	0.040
Sift	Benign	0.31	T
Sift4G	Benign	0.58	T
Polyphen		0.23	B
Vest4		0.38
MutPred		0.17		Loss of phosphorylation at Y63 (P = 0.1169);
MVP		0.030
ClinPred		0.17	T
GERP RS		-1.2
Varity_R		0.063
gMVP		0.073

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: rs376424195; hg19: chr9-15578857;