5-34867045-C-G

Variant names:

• chr5-34867045-C-G
• rs1386757747
• NM_144725.4:c.816C>G

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_144725.4(TTC23L):​c.816C>G​(p.Asn272Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000685 in 1,459,012 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 17/22 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 nucleotide change resulting in the same amino acid substitution has been previously reported as Uncertain significance in ClinVar.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: TTC23L NM_144725.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.411
• Publications: 0 publications found

Genes affected

TTC23L (HGNC:26355): (tetratricopeptide repeat domain 23 like) Predicted to be located in cytoplasm; microtubule cytoskeleton; and midbody. [provided by Alliance of Genome Resources, Apr 2022]

ENSG00000302680 (HGNC:):

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.05805227).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_144725.4. 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
	TTC23L	NM_144725.4	MANE Select	c.816C>G	p.Asn272Lys	missense	Exon 7 of 11	NP_653326.3
	TTC23L	NM_001386170.1		c.816C>G	p.Asn272Lys	missense	Exon 7 of 11	NP_001373099.1
	TTC23L	NM_001386171.1		c.843C>G	p.Asn281Lys	missense	Exon 7 of 10	NP_001373100.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TTC23L	ENST00000505624.6	TSL:1 MANE Select	c.816C>G	p.Asn272Lys	missense	Exon 7 of 11	ENSP00000422188.1	Q6PF05-1
	TTC23L	ENST00000610313.1	TSL:1	c.816C>G	p.Asn272Lys	missense	Exon 6 of 7	ENSP00000484792.1	Q6PF05-2
	TTC23L	ENST00000514080.2	TSL:2	c.816C>G	p.Asn272Lys	missense	Exon 6 of 10	ENSP00000497109.1	A0A3B3IS63

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 6.85e-7 AC: 1 AN: 1459012 Hom.: 0 Cov.: 31 AF XY: 0.00000138 AC XY: 1 AN XY: 725410

African (AFR) AF: 0.00 AC: 0 AN: 33446

American (AMR) AF: 0.00 AC: 0 AN: 44418

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26074

East Asian (EAS) AF: 0.00 AC: 0 AN: 39564

South Asian (SAS) AF: 0.00 AC: 0 AN: 85512

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53180

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 9.00e-7 AC: 1 AN: 1110772

Other (OTH) AF: 0.00 AC: 0 AN: 60278

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.11
BayesDel_addAF	Benign	-0.25	T
BayesDel_noAF	Benign	-0.59
CADD	Benign	9.1
DANN	Benign	0.97
DEOGEN2	Benign	0.0064	T
Eigen	Benign	-1.1
Eigen_PC	Benign	-1.1
FATHMM_MKL	Benign	0.034	N
LIST_S2	Benign	0.54	T
M_CAP	Benign	0.013	T
MetaRNN	Benign	0.058	T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	0.14	N
PhyloP100		-0.41
PrimateAI	Benign	0.24	T
PROVEAN	Benign	-1.2	N
REVEL	Benign	0.094
Sift	Benign	0.13	T
Sift4G	Benign	0.20	T
Polyphen		0.0020	B
Vest4		0.17
MutPred		0.40		Gain of methylation at N272 (P = 0.0179)
MVP		0.30
MPC		0.11
ClinPred		0.12	T
GERP RS		-4.1
Varity_R		0.091
gMVP		0.11
Mutation Taster		=100/0	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: rs1386757747; hg19: chr5-34867150;