rs1554622

Variant names:

• chr2-218741495-T-A
• rs1554622
• NM_014640.5:c.1661+911T>A

Your query was ambiguous. Multiple possible variants found:

• chr2-218741495-T-A
• chr2-218741495-T-G

Variant summary

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

The NM_014640.5(TTLL4):​c.1661+911T>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000658 in 151,972 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.0000066 (0 hom., cov: 32)
• Consequence: TTLL4 NM_014640.5 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.273
• Publications: 22 publications found

Genes affected

TTLL4 (HGNC:28976): (tubulin tyrosine ligase like 4) Predicted to enable tubulin binding activity and tubulin-glutamic acid ligase activity. Predicted to be involved in microtubule cytoskeleton organization and protein polyglutamylation. Predicted to act upstream of or within regulation of blastocyst development. Predicted to be located in cytosol. Predicted to be active in cilium. [provided by Alliance of Genome Resources, Apr 2022]

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 (BayesDel_noAF=-0.84).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TTLL4	NM_014640.5	c.1661+911T>A		intron_variant	Intron 5 of 19	ENST00000392102.6	NP_055455.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TTLL4	ENST00000392102.6	c.1661+911T>A		intron_variant	Intron 5 of 19	1	NM_014640.5	ENSP00000375951.1
TTLL4	ENST00000258398.8	c.1661+911T>A		intron_variant	Intron 3 of 17	2		ENSP00000258398.4
TTLL4	ENST00000442769.5	c.1661+911T>A		intron_variant	Intron 5 of 18	5		ENSP00000396555.1
TTLL4	ENST00000457313.5	c.1166+911T>A		intron_variant	Intron 4 of 18	2		ENSP00000393332.1

Frequencies

GnomAD3 genomes AF: 0.00000658 AC: 1 AN: 151972 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000242

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

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.00000658 AC: 1 AN: 151972 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 74242

African (AFR) AF: 0.0000242 AC: 1 AN: 41356

American (AMR) AF: 0.00 AC: 0 AN: 15266

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

East Asian (EAS) AF: 0.00 AC: 0 AN: 5188

South Asian (SAS) AF: 0.00 AC: 0 AN: 4830

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10556

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

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 67998

Other (OTH) AF: 0.00 AC: 0 AN: 2084

Alfa AF: 0.00 Hom.: 10146

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.84
CADD	Benign	8.7
DANN	Benign	0.73
PhyloP100		0.27

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: rs1554622; hg19: chr2-219606218;