22-44732311-A-G

Position:

• chr22-44732311-A-G

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_181333.4(PRR5):​c.475A>G​(p.Ser159Gly) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 34)
• Consequence: PRR5 NM_181333.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.33

Genes affected

PRR5 (HGNC:31682): (proline rich 5) This gene encodes a protein with a proline-rich domain. This gene is located in a region of chromosome 22 reported to contain a tumor suppressor gene that may be involved in breast and colorectal tumorigenesis. The protein is a component of the mammalian target of rapamycin complex 2 (mTORC2), and it regulates platelet-derived growth factor (PDGF) receptor beta expression and PDGF signaling to Akt and S6K1. Alternative splicing and the use of alternative promoters results in transcripts encoding different isoforms. Read-through transcripts from this gene into the downstream Rho GTPase activating protein 8 (ARHGAP8) gene also exist, which led to the original description of PRR5 and ARHGAP8 being a single gene. [provided by RefSeq, Nov 2010]

PRR5-ARHGAP8 (HGNC:34512): (PRR5-ARHGAP8 readthrough) The PRR5-ARHGAP8 mRNA is an infrequent but naturally occurring read-through transcript of the neighboring proline rich 5, renal (PRR5) and Rho GTPase activating protein 8 (ARHGAP8) genes. The resulting fusion protein contains sequence identity with each individual gene product, and it includes domains characteristic of a RhoGAP protein. The significance of this read-through transcript and the function of its protein product have not yet been determined. [provided by RefSeq, Nov 2010]

PRR5 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.34264222).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
PRR5	NM_181333.4	c.475A>G	p.Ser159Gly	missense_variant	6/8	ENST00000336985.11	NP_851850.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
PRR5	ENST00000336985.11	c.475A>G	p.Ser159Gly	missense_variant	6/8	1	NM_181333.4	ENSP00000337464.6
PRR5-ARHGAP8	ENST00000352766.11	c.475A>G	p.Ser159Gly	missense_variant	6/17	2		ENSP00000262731.11

Frequencies

GnomAD3 genomes Cov.: 34

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 34

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

Jun 21, 2021

The c.544A>G (p.S182G) alteration is located in exon 8 (coding exon 7) of the PRR5 gene. This alteration results from a A to G substitution at nucleotide position 544, causing the serine (S) at amino acid position 182 to be replaced by a glycine (G). 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	0.066
BayesDel_addAF	Uncertain	0.036	T
BayesDel_noAF	Benign	-0.19
CADD	Benign	20
DANN	Uncertain	0.99
DEOGEN2	Benign	0.041	.;.;T;.;.;.;T;T;T;.
Eigen	Benign	-0.17
Eigen_PC	Benign	-0.031
FATHMM_MKL	Uncertain	0.77	D
LIST_S2	Benign	0.78	T;T;T;.;.;T;T;T;T;T
M_CAP	Benign	0.041	D
MetaRNN	Benign	0.34	T;T;T;T;T;T;T;T;T;T
MetaSVM	Benign	-0.50	T
MutationAssessor	Benign	1.4	.;.;.;.;.;.;L;.;.;.
PROVEAN	Benign	-1.7	.;.;N;.;N;N;N;N;N;N
REVEL	Benign	0.23
Sift	Benign	0.044	.;.;D;.;T;T;T;T;D;T
Sift4G	Benign	0.36	T;T;T;T;T;T;T;T;T;T
Polyphen		0.0020, 0.95	.;.;.;.;.;.;B;.;.;P
Vest4		0.28
MutPred		0.53		.;.;.;.;.;.;Loss of sheet (P = 0.007);.;.;Loss of sheet (P = 0.007);
MVP		0.11
MPC		0.17
ClinPred		0.59	D
GERP RS		3.6
Varity_R		0.084
gMVP		0.16

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: chr22-45128191;