6-151538055-T-A

Position:

• chr6-151538055-T-A

Variant summary

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

The NM_025059.4(CCDC170):​c.197T>A​(p.Leu66His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,458,074 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: CCDC170 NM_025059.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.79

Genes affected

CCDC170 (HGNC:21177): (coiled-coil domain containing 170) The function of this gene and its encoded protein is not known. Several genome-wide association studies have implicated the region around this gene to be involved in breast cancer and bone mineral density, but no link to this specific gene has been found. [provided by RefSeq, May 2010]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CCDC170	NM_025059.4	c.197T>A	p.Leu66His	missense_variant	3/11	ENST00000239374.8
CCDC170	XM_011536147.3	c.215T>A	p.Leu72His	missense_variant	3/11
CCDC170	XM_011536148.3	c.215T>A	p.Leu72His	missense_variant	3/10
CCDC170	XM_047419372.1	c.197T>A	p.Leu66His	missense_variant	3/10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CCDC170	ENST00000239374.8	c.197T>A	p.Leu66His	missense_variant	3/11	1	NM_025059.4	P1
CCDC170	ENST00000544131.1	n.187T>A		non_coding_transcript_exon_variant	2/3	4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1458074 Hom.: 0 Cov.: 38 AF XY: 0.00000138 AC XY: 1 AN XY: 725220

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000117

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.0000166

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

Jan 23, 2024

The c.197T>A (p.L66H) alteration is located in exon 3 (coding exon 3) of the CCDC170 gene. This alteration results from a T to A substitution at nucleotide position 197, causing the leucine (L) at amino acid position 66 to be replaced by a histidine (H). 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	0.27
BayesDel_addAF	Uncertain	0.038	T
BayesDel_noAF	Benign	-0.18
CADD	Uncertain	25
DANN	Uncertain	0.98
DEOGEN2	Benign	0.082	T
Eigen	Uncertain	0.67
Eigen_PC	Uncertain	0.63
FATHMM_MKL	Uncertain	0.90	D
LIST_S2	Benign	0.73	T
M_CAP	Benign	0.025	D
MetaRNN	Uncertain	0.62	D
MetaSVM	Benign	-1.0	T
MutationAssessor	Pathogenic	2.9	M
MutationTaster	Benign	0.88	D;D
PrimateAI	Uncertain	0.52	T
PROVEAN	Uncertain	-4.3	D
REVEL	Benign	0.15
Sift	Uncertain	0.0050	D
Sift4G	Uncertain	0.0070	D
Polyphen		1.0	D
Vest4		0.77
MutPred		0.31		Loss of stability (P = 0.0296);
MVP		0.33
MPC		0.63
ClinPred		0.99	D
GERP RS		5.5
Varity_R		0.43
gMVP		0.32

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr6-151859190;