11-77336229-T-C

Position:

• chr11-77336229-T-C

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2 PP2

The NM_002576.5(PAK1):​c.1270A>G​(p.Met424Val) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: PAK1 NM_002576.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.67

Genes affected

PAK1 (HGNC:8590): (p21 (RAC1) activated kinase 1) This gene encodes a family member of serine/threonine p21-activating kinases, known as PAK proteins. These proteins are critical effectors that link RhoGTPases to cytoskeleton reorganization and nuclear signaling, and they serve as targets for the small GTP binding proteins Cdc42 and Rac. This specific family member regulates cell motility and morphology. Mutations in this gene have been associated with macrocephaly, seizures, and speech delay. Overexpression of this gene is also reported in many cancer types, and particularly in breast cancer. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Aug 2020]

ACMG classification

Verdict is Uncertain_significance. Variant got 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), PAK1. . Gene score misZ: 4.0036 (greater than the threshold 3.09). Trascript score misZ: 3.8133 (greater than threshold 3.09). The gene has 21 curated pathogenic missense variants (we use a threshold of 10). The gene has 3 curated benign missense variants. GenCC has associacion of the gene with intellectual developmental disorder with macrocephaly, seizures, and speech delay.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
PAK1	NM_002576.5	c.1270A>G	p.Met424Val	missense_variant	13/15	ENST00000356341.8	NP_002567.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
PAK1	ENST00000356341.8	c.1270A>G	p.Met424Val	missense_variant	13/15	1	NM_002576.5	ENSP00000348696.4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Jun 19, 2024

Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.92
BayesDel_addAF	Uncertain	0.15	D
BayesDel_noAF	Uncertain	-0.030
CADD	Pathogenic	29
DANN	Uncertain	0.99
DEOGEN2	Benign	0.26	T;T;.;T
Eigen	Benign	-0.015
Eigen_PC	Uncertain	0.25
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.93	D;D;D;D
M_CAP	Benign	0.041	D
MetaRNN	Uncertain	0.62	D;D;D;D
MetaSVM	Benign	-0.86	T
MutationAssessor	Benign	-0.53	N;.;N;.
PrimateAI	Pathogenic	0.84	D
PROVEAN	Uncertain	-3.8	D;D;D;D
REVEL	Uncertain	0.39
Sift	Uncertain	0.0010	D;D;D;D
Sift4G	Uncertain	0.020	D;D;D;D
Polyphen		0.016	B;B;B;P
Vest4		0.74
MutPred		0.66		Gain of sheet (P = 0.1208);Gain of sheet (P = 0.1208);Gain of sheet (P = 0.1208);.;
MVP		0.86
MPC		1.3
ClinPred		0.92	D
GERP RS		6.0
Varity_R		0.88
gMVP		0.83

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.060		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: rs1942661559; hg19: chr11-77047274;