15-43404529-C-G

Variant names:

• chr15-43404529-C-G
• NM_014444.5:c.1965C>G
• TUBGCP4 p.Thr655Thr

Variant summary

Our verdict is Likely benign. The variant received -1 ACMG points: 2P and 3B. PM2 BP4_Moderate BP7

The NM_014444.5(TUBGCP4):​c.1965C>G​(p.Thr655Thr) variant causes a synonymous 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. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. T655T) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: TUBGCP4 NM_014444.5 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.113
• Publications: 0 publications found

Genes affected

TUBGCP4 (HGNC:16691): (tubulin gamma complex component 4) This gene encodes a component of the gamma-tubulin ring complex, which is required for microtubule nucleation. In mammalian cells, the protein localizes to centrosomes in association with gamma-tubulin. Crystal structure analysis revealed a structure composed of five helical bundles arranged around conserved hydrophobic cores. An exposed surface area located in the C-terminal domain is essential and sufficient for direct binding to gamma-tubulin. Mutations in this gene that alter microtubule organization are associated with microcephaly and chorioretinopathy. Alternative splicing results in multiple transcript variants. [provided by RefSeq, May 2015]

TP53BP1 (HGNC:11999): (tumor protein p53 binding protein 1) This gene encodes a protein that functions in the DNA double-strand break repair pathway choice, promoting non-homologous end joining (NHEJ) pathways, and limiting homologous recombination. This protein plays multiple roles in the DNA damage response, including promoting checkpoint signaling following DNA damage, acting as a scaffold for recruitment of DNA damage response proteins to damaged chromatin, and promoting NHEJ pathways by limiting end resection following a double-strand break. These roles are also important during V(D)J recombination, class switch recombination and at unprotected telomeres. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Aug 2017]

ACMG classification

Our verdict: Likely_benign. The variant received -1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.36).
• BP7: Synonymous conserved (PhyloP=-0.113 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_014444.5. 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
	TUBGCP4	NM_014444.5	MANE Select	c.1965C>G	p.Thr655Thr	synonymous	Exon 17 of 18	NP_055259.2
	TP53BP1	NM_001141980.3	MANE Select	c.*2854G>C		3_prime_UTR	Exon 28 of 28	NP_001135452.1	Q12888-2
	TUBGCP4	NM_001286414.3		c.1968C>G	p.Thr656Thr	synonymous	Exon 17 of 18	NP_001273343.1	Q9UGJ1-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TUBGCP4	ENST00000564079.6	TSL:1 MANE Select	c.1965C>G	p.Thr655Thr	synonymous	Exon 17 of 18	ENSP00000456648.2	Q9UGJ1-2
	TUBGCP4	ENST00000260383.11	TSL:1	c.1968C>G	p.Thr656Thr	synonymous	Exon 17 of 18	ENSP00000260383.7	Q9UGJ1-1
	TP53BP1	ENST00000382044.9	TSL:1 MANE Select	c.*2854G>C		3_prime_UTR	Exon 28 of 28	ENSP00000371475.5	Q12888-2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.36
CADD	Benign	6.5
DANN	Benign	0.72
PhyloP100		-0.11
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

hg19: chr15-43696727;