19-39173372-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_005884.5(PAK4):c.659C>T(p.Ala220Val) variant causes a missense 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. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: PAK4 NM_005884.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.49

Genes affected

PAK4 (HGNC:16059): (p21 (RAC1) activated kinase 4) PAK proteins, a family of serine/threonine p21-activating kinases, include PAK1, PAK2, PAK3 and PAK4. PAK proteins are critical effectors that link Rho GTPases to cytoskeleton reorganization and nuclear signaling. They serve as targets for the small GTP binding proteins Cdc42 and Rac and have been implicated in a wide range of biological activities. PAK4 interacts specifically with the GTP-bound form of Cdc42Hs and weakly activates the JNK family of MAP kinases. PAK4 is a mediator of filopodia formation and may play a role in the reorganization of the actin cytoskeleton. Multiple alternatively spliced transcript variants encoding distinct isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.07428035).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PAK4	NM_005884.5	c.659C>T	p.Ala220Val	missense_variant	4/10	ENST00000360442.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PAK4	ENST00000360442.8	c.659C>T	p.Ala220Val	missense_variant	4/10	5	NM_005884.5	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1371290 Hom.: 0 Cov.: 33 AF XY: 0.00 AC XY: 0 AN XY: 672046

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

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.: 32

ExAC AF: 0.00000848 AC: 1

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

Jul 28, 2021

The c.659C>T (p.A220V) alteration is located in exon 5 (coding exon 2) of the PAK4 gene. This alteration results from a C to T substitution at nucleotide position 659, causing the alanine (A) at amino acid position 220 to be replaced by a valine (V). 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	0.067
BayesDel_addAF	Benign	-0.10	T
BayesDel_noAF	Benign	-0.38
Cadd	Benign	15
Dann	Uncertain	0.99
DEOGEN2	Benign	0.31	T;T;T
Eigen	Benign	-0.63
Eigen_PC	Benign	-0.52
FATHMM_MKL	Benign	0.17	N
M_CAP	Uncertain	0.10	D
MetaRNN	Benign	0.074	T;T;T
MetaSVM	Benign	-0.92	T
MutationAssessor	Benign	0.69	N;N;N
MutationTaster	Benign	0.60	D;D;D;D
PrimateAI	Uncertain	0.50	T
PROVEAN	Benign	-0.75	N;.;N
REVEL	Benign	0.088
Sift	Benign	0.34	T;.;T
Sift4G	Benign	0.23	T;T;T
Polyphen		0.0	B;B;B
Vest4		0.24
MutPred		0.21		Loss of relative solvent accessibility (P = 0.0676);Loss of relative solvent accessibility (P = 0.0676);Loss of relative solvent accessibility (P = 0.0676);
MVP		0.56
MPC		0.23
ClinPred		0.092	T
GERP RS		3.1
Varity_R		0.050
gMVP		0.15

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: rs751160538; hg19: chr19-39664012;