NM_020385.4:c.213G>A

Variant names:

• chr9-133417632-C-T
• rs868543227
• NM_020385.4:c.213G>A

Variant summary

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

The NM_020385.4(REXO4):​c.213G>A​(p.Lys71Lys) 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.

• Frequency: Genomes: not found (cov: 33)
• Consequence: REXO4 NM_020385.4 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.04
• Publications: 0 publications found

Genes affected

REXO4 (HGNC:12820): (REX4 homolog, 3'-5' exonuclease) Enables DNA binding activity and nuclease activity. Involved in DNA catabolic process, endonucleolytic; DNA catabolic process, exonucleolytic; and DNA repair. Located in nuclear speck and nucleolus. [provided by Alliance of Genome Resources, Apr 2022]

ADAMTS13 (HGNC:1366): (ADAM metallopeptidase with thrombospondin type 1 motif 13) This gene encodes a member of a family of proteins containing several distinct regions, including a metalloproteinase domain, a disintegrin-like domain, and a thrombospondin type 1 (TS) motif. The enzyme encoded by this gene specifically cleaves von Willebrand Factor (vWF). Defects in this gene are associated with thrombotic thrombocytopenic purpura. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jul 2013]

ADAMTS13 Gene-Disease associations (from GenCC):

• congenital thrombotic thrombocytopenic purpura

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Genomics England PanelApp, Orphanet, ClinGen, Labcorp Genetics (formerly Invitae)

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=-0.46).
• BP7: Synonymous conserved (PhyloP=1.04 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_020385.4. 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
	REXO4	NM_020385.4	MANE Select	c.213G>A	p.Lys71Lys	synonymous	Exon 1 of 8	NP_065118.2	Q9GZR2-1
	REXO4	NM_001279349.2		c.213G>A	p.Lys71Lys	synonymous	Exon 1 of 6	NP_001266278.1	Q9GZR2-2
	REXO4	NM_001279350.2		c.-21G>A		5_prime_UTR	Exon 1 of 8	NP_001266279.1	B4E331

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	REXO4	ENST00000371942.8	TSL:1 MANE Select	c.213G>A	p.Lys71Lys	synonymous	Exon 1 of 8	ENSP00000361010.3	Q9GZR2-1
	ADAMTS13	ENST00000485925.5	TSL:1	n.287+2988C>T		intron	N/A
	REXO4	ENST00000903994.1		c.213G>A	p.Lys71Lys	synonymous	Exon 1 of 8	ENSP00000574053.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

Alfa AF: 0.0000370 Hom.: 0

EpiCase AF: 0.0000545

EpiControl AF: 0.00

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.46
CADD	Benign	13
DANN	Benign	0.95
PhyloP100		1.0
PromoterAI		-0.057	Neutral

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: rs868543227; hg19: chr9-136282752;