7-129000444-G-T

Variant names:

• chr7-129000444-G-T
• rs1554439603
• NM_012470.4:c.996C>A

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP7

The NM_012470.4(TNPO3):​c.996C>A​(p.Gly332Gly) 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. G332G) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: TNPO3 NM_012470.4 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.231
• Publications: 0 publications found

Genes affected

TNPO3 (HGNC:17103): (transportin 3) The protein encoded by this gene is a nuclear import receptor for serine/arginine-rich (SR) proteins such as the splicing factors SFRS1 and SFRS2. The encoded protein has also been shown to be involved in HIV-1 infection, apparently through interaction with the HIV-1 capsid protein. Several protein-coding and non-coding transcript variants have been found for this gene. [provided by RefSeq, Apr 2020]

TNPO3 Gene-Disease associations (from GenCC):

• muscular dystrophy, limb-girdle, autosomal dominant

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
• autosomal dominant limb-girdle muscular dystrophy type 1F

  Inheritance: AD Classification: STRONG, MODERATE, SUPPORTIVE Submitted by: PanelApp Australia, Labcorp Genetics (formerly Invitae), Orphanet, Ambry Genetics

ACMG classification

Our verdict: Likely_benign. The variant received -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.53).
• BP7: Synonymous conserved (PhyloP=-0.231 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_012470.4. 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
	TNPO3	NM_012470.4	MANE Select	c.996C>A	p.Gly332Gly	synonymous	Exon 7 of 23	NP_036602.1	Q9Y5L0-2
	TNPO3	NM_001382216.1		c.996C>A	p.Gly332Gly	synonymous	Exon 7 of 23	NP_001369145.1	C9J7E5
	TNPO3	NM_001382217.1		c.1077C>A	p.Gly359Gly	synonymous	Exon 8 of 24	NP_001369146.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TNPO3	ENST00000265388.10	TSL:1 MANE Select	c.996C>A	p.Gly332Gly	synonymous	Exon 7 of 23	ENSP00000265388.5	Q9Y5L0-2
	TNPO3	ENST00000471234.5	TSL:1	c.996C>A	p.Gly332Gly	synonymous	Exon 7 of 22	ENSP00000418646.1	Q9Y5L0-5
	TNPO3	ENST00000482320.5	TSL:1	c.798C>A	p.Gly266Gly	synonymous	Exon 8 of 24	ENSP00000420089.1	E9PFH4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.53
CADD	Benign	5.5
DANN	Benign	0.67
PhyloP100		-0.23

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: rs1554439603; hg19: chr7-128640498;