rs953865013

Variant names:

• chr8-68022107-C-G
• rs953865013
• NM_024870.4:c.408C>G

Your query was ambiguous. Multiple possible variants found:

• chr8-68022107-C-G
• chr8-68022107-C-T

Variant summary

Our verdict is Likely benign. Variant got -1 ACMG points: 2P and 3B. PM2 BP4_Moderate BP7

The NM_024870.4(PREX2):​c.408C>G​(p.Leu136Leu) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000263 in 152,054 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 0.000026 (0 hom., cov: 32)
• Consequence: PREX2 NM_024870.4 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.0190

Genes affected

PREX2 (HGNC:22950): (phosphatidylinositol-3,4,5-trisphosphate dependent Rac exchange factor 2) The protein encoded by this gene belongs to the phosphatidylinositol 3,4,5-trisphosphate (PIP3)-dependent Rac exchanger (PREX) family, which are Dbl-type guanine-nucleotide exchange factors for Rac family small G proteins. Structural domains of this protein include the catalytic diffuse B-cell lymphoma homology and pleckstrin homology (DHPH) domain, two disheveled, EGL-10, and pleckstrin homology (DEP) domains, two PDZ domains, and a C-terminal inositol polyphosphate-4 phosphatase (IP4P) domain that is found in one of the isoforms. This protein facilitates the exchange of GDP for GTP on Rac1, allowing the GTP-bound Rac1 to activate downstream effectors. Studies also show that the pleckstrin homology domain of this protein interacts with the phosphatase and tensin homolog (PTEN) gene product to inhibit PTEN phosphatase activity, thus activating the phosphoinositide-3 kinase (PI3K) signaling pathway. Conversely, the PTEN gene product has also been shown to inhibit the GEF activity of this protein. This gene plays a role in insulin-signaling pathways, and either mutations or overexpression of this gene have been observed in some cancers. [provided by RefSeq, Apr 2016]

ACMG classification

Verdict is Likely_benign. Variant got -1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.45).
• BP7: Synonymous conserved (PhyloP=0.019 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PREX2	NM_024870.4	c.408C>G	p.Leu136Leu	synonymous_variant	Exon 4 of 40	ENST00000288368.5	NP_079146.2
PREX2	NM_025170.6	c.408C>G	p.Leu136Leu	synonymous_variant	Exon 4 of 24		NP_079446.3
PREX2	XM_047422267.1	c.273C>G	p.Leu91Leu	synonymous_variant	Exon 4 of 40		XP_047278223.1
PREX2	XM_047422268.1	c.408C>G	p.Leu136Leu	synonymous_variant	Exon 4 of 28		XP_047278224.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PREX2	ENST00000288368.5	c.408C>G	p.Leu136Leu	synonymous_variant	Exon 4 of 40	1	NM_024870.4	ENSP00000288368.4
PREX2	ENST00000529398.5	n.435C>G		non_coding_transcript_exon_variant	Exon 4 of 24	1
PREX2	ENST00000517617.1	n.119C>G		non_coding_transcript_exon_variant	Exon 2 of 24	2

Frequencies

GnomAD3 genomes AF: 0.0000263 AC: 4 AN: 152054 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000966

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

GnomAD4 exome Cov.: 24

GnomAD4 genome AF: 0.0000263 AC: 4 AN: 152054 Hom.: 0 Cov.: 32 AF XY: 0.0000269 AC XY: 2 AN XY: 74268

Gnomad4 AFR AF: 0.0000966

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.00

Gnomad4 OTH AF: 0.00

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.45
CADD	Benign	5.6
DANN	Benign	0.73

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

LitVar

Other links and lift over

dbSNP: rs953865013; hg19: chr8-68934342;