19-7440049-A-C

Position:

• chr19-7440049-A-C

Variant summary

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

The NM_001367823.1(ARHGEF18):​c.968-295A>C variant causes a intron 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: 31)
• Consequence: ARHGEF18 NM_001367823.1 intron
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.08

Genes affected

ARHGEF18 (HGNC:17090): (Rho/Rac guanine nucleotide exchange factor 18) Rho GTPases are GTP binding proteins that regulate a wide spectrum of cellular functions. These cellular processes include cytoskeletal rearrangements, gene transcription, cell growth and motility. Activation of Rho GTPases is under the direct control of guanine nucleotide exchange factors (GEFs). The protein encoded by this gene is a guanine nucleotide exchange factor and belongs to the Rho GTPase GEF family. Family members share a common feature, a Dbl (DH) homology domain followed by a pleckstrin (PH) homology domain. Alternatively spliced transcript variants encoding different isoforms have been identified. [provided by RefSeq, Nov 2018]

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=0.14595234).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ARHGEF18	NM_001367823.1	c.968-295A>C		intron_variant		ENST00000668164.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ARHGEF18	ENST00000668164.2	c.968-295A>C		intron_variant			NM_001367823.1	A2

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 39

GnomAD4 genome Cov.: 31

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Inborn genetic diseases Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jan 25, 2023

The c.109A>C (p.N37H) alteration is located in exon 1 (coding exon 1) of the ARHGEF18 gene. This alteration results from a A to C substitution at nucleotide position 109, causing the asparagine (N) at amino acid position 37 to be replaced by a histidine (H). 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
BayesDel_addAF	Benign	-0.26	T
BayesDel_noAF	Benign	-0.61
CADD	Benign	18
DANN	Uncertain	0.99
Eigen	Benign	0.17
Eigen_PC	Uncertain	0.24
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Benign	0.28	T
M_CAP	Benign	0.0073	T
MetaRNN	Benign	0.15	T
MetaSVM	Benign	-1.0	T
MutationTaster	Benign	1.0	D;N
PrimateAI	Benign	0.40	T
PROVEAN	Benign	-0.11	N
REVEL	Benign	0.10
Sift	Benign	0.042	D
Sift4G	Uncertain	0.047	D
Vest4		0.15
MutPred		0.17		Gain of solvent accessibility (P = 0.012);
MVP		0.51
MPC		0.46
ClinPred		0.78	D
GERP RS		4.0
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

No publications associated with this variant yet.

Other links and lift over

hg19: chr19-7504935;