chr16-1349473-C-G

Position:

• chr16-1349473-C-G

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The ENST00000007390.3(TSR3):​c.903G>C​(p.Glu301Asp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,360 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: TSR3 ENST00000007390.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -2.35

Genes affected

TSR3 (HGNC:14175): (TSR3 ribosome maturation factor) Enables transferase activity. Involved in enzyme-directed rRNA pseudouridine synthesis. Predicted to be located in cytosol. [provided by Alliance of Genome Resources, Apr 2022]

BAIAP3 (HGNC:948): (BAI1 associated protein 3) This p53-target gene encodes a brain-specific angiogenesis inhibitor. The protein is a seven-span transmembrane protein and a member of the secretin receptor family. It interacts with the cytoplasmic region of brain-specific angiogenesis inhibitor 1. This protein also contains two C2 domains, which are often found in proteins involved in signal transduction or membrane trafficking. Its expression pattern and similarity to other proteins suggest that it may be involved in synaptic functions. Several transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Nov 2010]

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.05617109).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TSR3	NM_001001410.3	c.903G>C	p.Glu301Asp	missense_variant	6/6	ENST00000007390.3	NP_001001410.1
BAIAP3	NM_001199097.2			downstream_gene_variant		ENST00000426824.8	NP_001186026.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
TSR3	ENST00000007390.3	c.903G>C	p.Glu301Asp	missense_variant	6/6	1	NM_001001410.3	ENSP00000007390	P1
BAIAP3	ENST00000426824.8			downstream_gene_variant		2	NM_001199097.2	ENSP00000407242	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461360 Hom.: 0 Cov.: 31 AF XY: 0.00000138 AC XY: 1 AN XY: 726958

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.0000383

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

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

Oct 03, 2022

The c.903G>C (p.E301D) alteration is located in exon 6 (coding exon 6) of the TSR3 gene. This alteration results from a G to C substitution at nucleotide position 903, causing the glutamic acid (E) at amino acid position 301 to be replaced by an aspartic acid (D). 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	0.10
BayesDel_addAF	Benign	-0.33	T
BayesDel_noAF	Benign	-0.71
CADD	Benign	0.14
DANN	Benign	0.93
DEOGEN2	Benign	0.016	T
Eigen	Benign	-1.3
Eigen_PC	Benign	-1.4
FATHMM_MKL	Benign	0.035	N
LIST_S2	Benign	0.39	T
M_CAP	Benign	0.0065	T
MetaRNN	Benign	0.056	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Uncertain	2.3	M
MutationTaster	Benign	1.0	N
PrimateAI	Benign	0.33	T
PROVEAN	Benign	0.090	N
REVEL	Benign	0.0040
Sift	Benign	0.12	T
Sift4G	Benign	0.39	T
Polyphen		0.0060	B
Vest4		0.13
MutPred		0.17		Loss of helix (P = 0.079);
MVP		0.076
MPC		0.054
ClinPred		0.087	T
GERP RS		-4.7
Varity_R		0.029
gMVP		0.052

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: chr16-1399474;