1-38911396-A-G

Position:

• chr1-38911396-A-G

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_017821.5(RHBDL2):​c.434T>C​(p.Val145Ala) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000274 in 1,461,844 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 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: 0.0000027 (0 hom.)
• Consequence: RHBDL2 NM_017821.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.39

Genes affected

RHBDL2 (HGNC:16083): (rhomboid like 2) The protein encoded by this gene is a member of the rhomboid family of integral membrane proteins. This family contains proteins that are related to Drosophila rhomboid protein. Members of this family are found in both prokaryotes and eukaryotes and are thought to function as intramembrane serine proteases. The encoded protein is thought to release soluble growth factors by proteolytic cleavage of certain membrane-bound substrates, including ephrin B2 and ephrin B3. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Feb 2015]

RRAGC-DT (HGNC:55793): (RRAGC divergent transcript)

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.043678373).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
RHBDL2	NM_017821.5	c.434T>C	p.Val145Ala	missense_variant	4/8	ENST00000372990.6
RHBDL2	NM_001304746.2	c.674T>C	p.Val225Ala	missense_variant	4/8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
RHBDL2	ENST00000372990.6	c.434T>C	p.Val145Ala	missense_variant	4/8	5	NM_017821.5	P1
RRAGC-DT	ENST00000667635.1	n.267+51157A>G		intron_variant, non_coding_transcript_variant

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000274 AC: 4 AN: 1461844 Hom.: 0 Cov.: 30 AF XY: 0.00000138 AC XY: 1 AN XY: 727224

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: 0.00000360

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

Alfa AF: 0.0000370 Hom.: 0

Bravo AF: 0.00000378

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

Mar 29, 2022

The c.434T>C (p.V145A) alteration is located in exon 4 (coding exon 3) of the RHBDL2 gene. This alteration results from a T to C substitution at nucleotide position 434, causing the valine (V) at amino acid position 145 to be replaced by an alanine (A). 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	0.15
BayesDel_addAF	Benign	-0.28	T
BayesDel_noAF	Benign	-0.64
CADD	Benign	13
DANN	Benign	0.95
DEOGEN2	Benign	0.013	T;T
Eigen	Benign	-0.79
Eigen_PC	Benign	-0.73
FATHMM_MKL	Benign	0.11	N
LIST_S2	Benign	0.54	T;.
M_CAP	Benign	0.0035	T
MetaRNN	Benign	0.044	T;T
MetaSVM	Benign	-0.98	T
MutationAssessor	Benign	1.0	L;L
MutationTaster	Benign	1.0	N;N;N;N
PrimateAI	Benign	0.36	T
PROVEAN	Benign	-2.2	N;N
REVEL	Benign	0.065
Sift	Benign	0.13	T;T
Sift4G	Uncertain	0.042	D;D
Polyphen		0.0010	B;B
Vest4		0.16
MVP		0.088
MPC		0.075
ClinPred		0.13	T
GERP RS		1.6
Varity_R		0.090
gMVP		0.48

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: rs1643139392; hg19: chr1-39377068;