1-228276575-T-G

Variant names:

• chr1-228276575-T-G
• rs1188722
• NM_001386125.1:c.7471T>G

Variant summary

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

The NM_001386125.1(OBSCN):​c.7471T>G​(p.Phe2491Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 16/22 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. F2491L) has been classified as Benign.

• Frequency: Genomes: not found (cov: 33)
• Consequence: OBSCN NM_001386125.1 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.61
• Publications: 24 publications found

Genes affected

OBSCN (HGNC:15719): (obscurin, cytoskeletal calmodulin and titin-interacting RhoGEF) The obscurin gene spans more than 150 kb, contains over 80 exons and encodes a protein of approximately 720 kDa. The encoded protein contains 68 Ig domains, 2 fibronectin domains, 1 calcium/calmodulin-binding domain, 1 RhoGEF domain with an associated PH domain, and 2 serine-threonine kinase domains. This protein belongs to the family of giant sacromeric signaling proteins that includes titin and nebulin, and may have a role in the organization of myofibrils during assembly and may mediate interactions between the sarcoplasmic reticulum and myofibrils. Alternatively spliced transcript variants encoding different isoforms have been identified. [provided by RefSeq, Jul 2008]

OBSCN Gene-Disease associations (from GenCC):

• rhabdomyolysis, susceptibility to, 1

  Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
• dilated cardiomyopathy

  Inheritance: AD Classification: LIMITED Submitted by: ClinGen
• hypertrophic cardiomyopathy

  Inheritance: AD Classification: LIMITED Submitted by: ClinGen

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=0.07773107).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001386125.1. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	OBSCN	NM_001386125.1	MANE Select	c.7471T>G	p.Phe2491Val	missense	Exon 26 of 116	NP_001373054.1	Q5VST9-7
	OBSCN	NM_001271223.3		c.7471T>G	p.Phe2491Val	missense	Exon 26 of 116	NP_001258152.2
	OBSCN	NM_001098623.2		c.6346T>G	p.Phe2116Val	missense	Exon 22 of 105	NP_001092093.2	A0ABB0I190

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	OBSCN	ENST00000680850.1	MANE Select	c.7471T>G	p.Phe2491Val	missense	Exon 26 of 116	ENSP00000505517.1	Q5VST9-7
	OBSCN	ENST00000636476.2	TSL:1	c.6346T>G	p.Phe2116Val	missense	Exon 21 of 104	ENSP00000489816.2	A0ABB0L580
	OBSCN	ENST00000570156.7	TSL:5	c.7471T>G	p.Phe2491Val	missense	Exon 26 of 116	ENSP00000455507.2	A6NGQ3

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 57

GnomAD4 genome Cov.: 33

Alfa AF: 0.00 Hom.: 44204

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.11
BayesDel_addAF	Benign	-0.23	T
BayesDel_noAF	Benign	-0.56
CADD	Benign	17
DANN	Benign	0.53
DEOGEN2	Benign	0.015	T
Eigen	Benign	-1.2
Eigen_PC	Benign	-1.0
FATHMM_MKL	Benign	0.59	D
LIST_S2	Benign	0.53	T
M_CAP	Benign	0.013	T
MetaRNN	Benign	0.078	T
MetaSVM	Benign	-0.98	T
MutationAssessor	Benign	-0.94	N
PhyloP100		1.6
PrimateAI	Benign	0.47	T
PROVEAN	Benign	1.0	N
REVEL	Benign	0.089
Sift	Benign	0.066	T
Sift4G	Uncertain	0.0060	D
Polyphen		0.077	B
Vest4		0.17
MutPred		0.46		Gain of MoRF binding (P = 0.0778)
MVP		0.22
MPC		0.14
ClinPred		0.39	T
GERP RS		4.2
Varity_R		0.081
gMVP		0.15
Mutation Taster		=283/17	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs1188722; hg19: chr1-228464276;