7-6402337-G-A

Variant names:

• chr7-6402337-G-A
• rs1554264268
• NM_006908.5:c.470G>A

Variant summary

Our verdict is Pathogenic. The variant received 11 ACMG points: 11P and 0B. PM1 PM2 PP2 PP3_Strong PP5_Moderate

The NM_006908.5(RAC1):​c.470G>A​(p.Cys157Tyr) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. 13/22 in silico tools predict a damaging outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★).

• Frequency: Genomes: not found (cov: 29)
• Consequence: RAC1 NM_006908.5 missense
• Clinical Significance: Likely pathogenic criteria provided, single submitter P:2
• Conservation: PhyloP100: 9.87
• Publications: 5 publications found

Genes affected

RAC1 (HGNC:9801): (Rac family small GTPase 1) The protein encoded by this gene is a GTPase which belongs to the RAS superfamily of small GTP-binding proteins. Members of this superfamily appear to regulate a diverse array of cellular events, including the control of cell growth, cytoskeletal reorganization, and the activation of protein kinases. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Mar 2009]

RAC1 Gene-Disease associations (from GenCC):

• intellectual disability, autosomal dominant 48

  Inheritance: AD Classification: STRONG, SUPPORTIVE Submitted by: Orphanet, G2P, Illumina, Ambry Genetics

ACMG classification

Our verdict: Pathogenic. The variant received 11 ACMG points.

• PM1: In a hotspot region, there are 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 3 uncertain in NM_006908.5
• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in the RAC1 gene, where missense mutations are typically associated with disease (based on misZ statistic). The gene has 23 curated pathogenic missense variants (we use a threshold of 10). The gene has 1 curated benign missense variants. Gene score misZ: 3.1347 (above the threshold of 3.09). Trascript score misZ: 3.9366 (above the threshold of 3.09). GenCC associations: The gene is linked to intellectual disability, autosomal dominant 48.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.965
• PP5: Variant 7-6402337-G-A is Pathogenic according to our data. Variant chr7-6402337-G-A is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 445282.Status of the report is criteria_provided_single_submitter, 1 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_006908.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	RAC1	NM_006908.5	MANE Select	c.470G>A	p.Cys157Tyr	missense	Exon 6 of 6	NP_008839.2
	RAC1	NM_018890.4		c.527G>A	p.Cys176Tyr	missense	Exon 7 of 7	NP_061485.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	RAC1	ENST00000348035.9	TSL:1 MANE Select	c.470G>A	p.Cys157Tyr	missense	Exon 6 of 6	ENSP00000258737.7
	RAC1	ENST00000356142.4	TSL:1	c.527G>A	p.Cys176Tyr	missense	Exon 7 of 7	ENSP00000348461.4
	RAC1	ENST00000488373.5	TSL:1	n.701G>A		non_coding_transcript_exon	Exon 7 of 7

Frequencies

GnomAD3 genomes Cov.: 29

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 29

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:2

Revision: criteria provided, single submitter

Submissions by phenotype

Intellectual disability, autosomal dominant 48 Pathogenic:1

Dec 09, 2022

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

not provided Pathogenic:1

Oct 09, 2019

GeneDx

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Not observed in large population cohorts (Lek et al., 2016); In silico analysis, which includes protein predictors and evolutionary conservation, supports a deleterious effect; This variant is associated with the following publications: (PMID: 28886345)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.41	D
BayesDel_noAF	Pathogenic	0.35
CADD	Pathogenic	30
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.71	D
Eigen	Pathogenic	1.2
Eigen_PC	Pathogenic	1.1
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Benign	0.83	T
M_CAP	Pathogenic	0.32	D
MetaRNN	Pathogenic	0.96	D
MetaSVM	Uncertain	0.78	D
MutationAssessor	Pathogenic	4.1	H
PhyloP100		9.9
PrimateAI	Pathogenic	0.95	D
PROVEAN	Pathogenic	-10	D
REVEL	Pathogenic	0.76
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0	D
Polyphen		1.0	D
Vest4		0.93
MutPred		0.85		Gain of phosphorylation at C157 (P = 0.0607)
MVP		0.93
MPC		4.1
ClinPred		1.0	D
GERP RS		6.1
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.99
gMVP		0.99
Mutation Taster		=1/99	disease causing (ClinVar)

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: rs1554264268; hg19: chr7-6441968;