3-14654457-A-G

Position:

• chr3-14654457-A-G

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2 PP3

The NM_016474.5(CCDC174):​c.74A>G​(p.Lys25Arg) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: CCDC174 NM_016474.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.88

Genes affected

CCDC174 (HGNC:28033): (coiled-coil domain containing 174) The protein encoded by this gene is found in the nucleus, where it interacts with eukaryotic translation initiation factor 4A, isoform 3. The encoded protein appears to be a part of the exon junction complex, which is involved in RNA processing, translation, and nonsense-mediated mRNA decay. A mutation in this gene has been associated with infantile hypotonia with psychomotor retardation. [provided by RefSeq, Mar 2016]

CCDC174 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.748

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CCDC174	NM_016474.5	c.74A>G	p.Lys25Arg	missense_variant	2/11	ENST00000383794.7	NP_057558.3
CCDC174	NM_001410719.1	c.74A>G	p.Lys25Arg	missense_variant	2/9		NP_001397648.1
CCDC174	XM_017006555.3	c.74A>G	p.Lys25Arg	missense_variant	2/8		XP_016862044.1
CCDC174	NR_135523.2	n.149A>G		non_coding_transcript_exon_variant	2/10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CCDC174	ENST00000383794.7	c.74A>G	p.Lys25Arg	missense_variant	2/11	1	NM_016474.5	ENSP00000373304.3
CCDC174	ENST00000465759.1	n.138A>G		non_coding_transcript_exon_variant	2/7	1
CCDC174	ENST00000303688.8	c.74A>G	p.Lys25Arg	missense_variant	2/9	5		ENSP00000302344.7
CCDC174	ENST00000463438.5	n.147A>G		non_coding_transcript_exon_variant	2/5	2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 28

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Feb 05, 2024

The c.74A>G (p.K25R) alteration is located in exon 2 (coding exon 2) of the CCDC174 gene. This alteration results from a A to G substitution at nucleotide position 74, causing the lysine (K) at amino acid position 25 to be replaced by an arginine (R). 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	0.30
BayesDel_addAF	Benign	-0.0087	T
BayesDel_noAF	Benign	-0.25
CADD	Pathogenic	26
DANN	Uncertain	1.0
DEOGEN2	Benign	0.25	T;T
Eigen	Pathogenic	0.70
Eigen_PC	Pathogenic	0.70
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.94	D;D
M_CAP	Benign	0.017	T
MetaRNN	Pathogenic	0.75	D;D
MetaSVM	Benign	-0.66	T
MutationAssessor	Uncertain	2.5	M;.
MutationTaster	Benign	1.0	D;D
PrimateAI	Uncertain	0.71	T
PROVEAN	Benign	-2.0	N;N
REVEL	Benign	0.18
Sift	Benign	0.10	T;T
Sift4G	Benign	0.074	T;T
Polyphen		0.97	D;.
Vest4		0.76
MutPred		0.39		Loss of ubiquitination at K25 (P = 0.0041);Loss of ubiquitination at K25 (P = 0.0041);
MVP		0.80
MPC		0.076
ClinPred		0.94	D
GERP RS		5.5
Varity_R		0.23
gMVP		0.33

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		Details are displayed if max score is > 0.2

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

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr3-14695964;