NM_032496.4:c.760C>G

Variant names:

• chr12-57477266-G-C
• rs143914870
• NM_032496.4:c.760C>G

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_032496.4(ARHGAP9):​c.760C>G​(p.Pro254Ala) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000709 in 1,410,134 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P254T) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 7.1e-7 (0 hom.)
• Consequence: ARHGAP9 NM_032496.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.283
• Publications: 0 publications found

Genes affected

ARHGAP9 (HGNC:14130): (Rho GTPase activating protein 9) This gene encodes a member of the Rho-GAP family of GTPase activating proteins. The protein has substantial GAP activity towards several Rho-family GTPases in vitro, converting them to an inactive GDP-bound state. It is implicated in regulating adhesion of hematopoietic cells to the extracellular matrix. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

MARS1 (HGNC:6898): (methionyl-tRNA synthetase 1) This gene encodes a member of the class I family of aminoacyl-tRNA synthetases. These enzymes play a critical role in protein biosynthesis by charging tRNAs with their cognate amino acids. The encoded protein is a component of the multi-tRNA synthetase complex and catalyzes the ligation of methionine to tRNA molecules. [provided by RefSeq, Jan 2011]

MARS1 Gene-Disease associations (from GenCC):

• Charcot-Marie-Tooth disease axonal type 2U

  Inheritance: AD Classification: STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet
• severe early-onset pulmonary alveolar proteinosis due to MARS deficiency

  Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet
• autosomal recessive spastic paraplegia type 70

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• Charcot-Marie-Tooth disease

  Inheritance: AD Classification: LIMITED Submitted by: ClinGen
• spastic paraplegia 70, autosomal recessive

  Inheritance: Unknown Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae)
• trichothiodystrophy 9, nonphotosensitive

  Inheritance: Unknown, AR Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Illumina

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.16596678).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ARHGAP9	NM_032496.4	c.760C>G	p.Pro254Ala	missense_variant	Exon 5 of 18	ENST00000393791.8	NP_115885.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ARHGAP9	ENST00000393791.8	c.760C>G	p.Pro254Ala	missense_variant	Exon 5 of 18	1	NM_032496.4	ENSP00000377380.3

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome AF: 7.09e-7 AC: 1 AN: 1410134 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 696496

African (AFR) AF: 0.00 AC: 0 AN: 31688

American (AMR) AF: 0.00 AC: 0 AN: 37004

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 22292

East Asian (EAS) AF: 0.00 AC: 0 AN: 39302

South Asian (SAS) AF: 0.00 AC: 0 AN: 78214

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 51456

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5484

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1086612

Other (OTH) AF: 0.0000172 AC: 1 AN: 58082

GnomAD4 genome Cov.: 31

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.061
BayesDel_addAF	Benign	-0.19	T
BayesDel_noAF	Benign	-0.51
CADD	Benign	17
DANN	Uncertain	0.99
DEOGEN2	Benign	0.024	.;.;.;T;.;T;T;T;.
Eigen	Benign	-0.16
Eigen_PC	Benign	-0.26
FATHMM_MKL	Benign	0.26	N
LIST_S2	Benign	0.82	T;T;T;.;T;T;T;T;T
M_CAP	Benign	0.0080	T
MetaRNN	Benign	0.17	T;T;T;T;T;T;T;T;T
MetaSVM	Benign	-0.99	T
MutationAssessor	Uncertain	2.3	M;M;.;.;.;.;.;.;.
PhyloP100		0.28
PrimateAI	Benign	0.29	T
PROVEAN	Benign	-2.0	N;N;N;.;N;N;N;N;N
REVEL	Benign	0.034
Sift	Benign	0.099	T;T;T;.;T;T;D;D;D
Sift4G	Benign	0.062	T;T;T;T;T;.;.;D;.
Polyphen		0.85	P;.;.;.;.;.;.;.;.
Vest4		0.22
MutPred		0.21		Gain of catalytic residue at N253 (P = 0.0349);Gain of catalytic residue at N253 (P = 0.0349);.;.;.;.;.;.;.;
MVP		0.68
MPC		0.047
ClinPred		0.49	T
GERP RS		1.3
gMVP		0.19
Mutation Taster		=79/21	polymorphism

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: rs143914870; hg19: chr12-57871049;