2-178834268-C-T

Variant names:

• chr2-178834268-C-T
• rs998023741
• NM_173648.4:c.4498G>A

Variant summary

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

The NM_173648.4(CCDC141):​c.4498G>A​(p.Gly1500Ser) variant causes a missense change. The variant allele was found at a frequency of 0.0000026 in 1,536,026 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 10/15 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G1500V) has been classified as Uncertain significance.

• Frequency:
  • Genomes: 𝑓 0.000020 (0 hom., cov: 32)
  • Exomes 𝑓: 7.2e-7 (0 hom.)
• Consequence: CCDC141 NM_173648.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 4.58
• Publications: 0 publications found

Genes affected

CCDC141 (HGNC:26821): (coiled-coil domain containing 141) Predicted to be involved in axon guidance and cell adhesion. Predicted to act upstream of or within centrosome localization and cerebral cortex radially oriented cell migration. Predicted to be located in centrosome; cytoplasm; and plasma membrane. Predicted to be active in neuron projection. [provided by Alliance of Genome Resources, Apr 2022]

CCDC141 Gene-Disease associations (from GenCC):

• Kallmann syndrome

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• hypogonadotropic hypogonadism

  Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics

ENSG00000287149 (HGNC:):

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=0.41127485).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_173648.4. 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
	CCDC141	NM_173648.4	MANE Select	c.4498G>A	p.Gly1500Ser	missense	Exon 24 of 24	NP_775919.3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CCDC141	ENST00000443758.7	TSL:5 MANE Select	c.4498G>A	p.Gly1500Ser	missense	Exon 24 of 24	ENSP00000390190.2	Q6ZP82-2
	CCDC141	ENST00000922698.1		c.4498G>A	p.Gly1500Ser	missense	Exon 25 of 25	ENSP00000592757.1
	CCDC141	ENST00000894515.1		c.4318G>A	p.Gly1440Ser	missense	Exon 23 of 23	ENSP00000564574.1

Frequencies

GnomAD3 genomes AF: 0.0000197 AC: 3 AN: 152172 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000724

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

GnomAD4 exome AF: 7.23e-7 AC: 1 AN: 1383854 Hom.: 0 Cov.: 31 AF XY: 0.00000146 AC XY: 1 AN XY: 682882

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.0000317 AC: 1 AN: 31588

American (AMR) AF: 0.00 AC: 0 AN: 35698

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25176

East Asian (EAS) AF: 0.00 AC: 0 AN: 35734

South Asian (SAS) AF: 0.00 AC: 0 AN: 79234

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 33936

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5696

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1078840

Other (OTH) AF: 0.00 AC: 0 AN: 57952

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome AF: 0.0000197 AC: 3 AN: 152172 Hom.: 0 Cov.: 32 AF XY: 0.0000269 AC XY: 2 AN XY: 74336

African (AFR) AF: 0.0000724 AC: 3 AN: 41448

American (AMR) AF: 0.00 AC: 0 AN: 15278

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3468

East Asian (EAS) AF: 0.00 AC: 0 AN: 5194

South Asian (SAS) AF: 0.00 AC: 0 AN: 4818

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10616

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 68028

Other (OTH) AF: 0.00 AC: 0 AN: 2094

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.12
BayesDel_addAF	Benign	-0.10	T
BayesDel_noAF	Benign	-0.38
CADD	Benign	19
DANN	Uncertain	0.99
Eigen	Uncertain	0.64
Eigen_PC	Uncertain	0.61
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Benign	0.54	T
M_CAP	Benign	0.030	D
MetaRNN	Benign	0.41	T
MetaSVM	Benign	-0.88	T
PhyloP100		4.6
PrimateAI	Benign	0.46	T
MutPred		0.52		Loss of catalytic residue at G1500 (P = 0.0347)
ClinPred		0.88	D
GERP RS		5.8
Mutation Taster		=71/29	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: rs998023741; hg19: chr2-179698995;