chr3-114056387-G-A

Position:

• chr3-114056387-G-A

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_020817.2(CCDC191):​c.80C>T​(p.Pro27Leu) 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. 14/20 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: CCDC191 NM_020817.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.04

Genes affected

CCDC191 (HGNC:29272): (coiled-coil domain containing 191)

QTRT2 (HGNC:25771): (queuine tRNA-ribosyltransferase accessory subunit 2) This gene encodes a subunit of tRNA-guanine transglycosylase. tRNA-guanine transglycosylase is a heterodimeric enzyme complex that plays a critical role in tRNA modification by synthesizing the 7-deazaguanosine queuosine, which is found in tRNAs that code for asparagine, aspartic acid, histidine, and tyrosine. The encoded protein may play a role in the queuosine 5'-monophosphate salvage pathway. Alternatively spliced transcript variants encoding multiple isoforms have been observed for this gene. [provided by RefSeq, Feb 2012]

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.043358445).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CCDC191	NM_020817.2	c.80C>T	p.Pro27Leu	missense_variant	1/17	ENST00000295878.8	NP_065868.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CCDC191	ENST00000295878.8	c.80C>T	p.Pro27Leu	missense_variant	1/17	1	NM_020817.2	ENSP00000295878	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

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

Nov 09, 2023

The c.80C>T (p.P27L) alteration is located in exon 1 (coding exon 1) of the CCDC191 gene. This alteration results from a C to T substitution at nucleotide position 80, causing the proline (P) at amino acid position 27 to be replaced by a leucine (L). 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	0.096
BayesDel_addAF	Benign	-0.11	T
BayesDel_noAF	Benign	-0.40
CADD	Benign	16
DANN	Benign	0.93
DEOGEN2	Benign	0.0017	T;T
Eigen	Benign	-0.66
Eigen_PC	Benign	-0.57
FATHMM_MKL	Benign	0.29	N
LIST_S2	Benign	0.62	T;T
M_CAP	Benign	0.0050	T
MetaRNN	Benign	0.043	T;T
MetaSVM	Benign	-1.1	T
MutationTaster	Benign	1.0	D;N
PrimateAI	Benign	0.28	T
PROVEAN	Benign	-1.4	N;N
REVEL	Benign	0.011
Sift	Benign	0.97	T;T
Sift4G	Benign	1.0	T;.
Polyphen		0.11	B;B
Vest4		0.20
MutPred		0.27		Loss of glycosylation at P29 (P = 0.0049);Loss of glycosylation at P29 (P = 0.0049);
MVP		0.20
MPC		0.22
ClinPred		0.16	T
GERP RS		2.3
Varity_R		0.035
gMVP		0.11

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: chr3-113775234;