2-170236001-G-T

Variant names:

• chr2-170236001-G-T
• rs773287656
• NM_138995.5:c.614G>T

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_138995.5(MYO3B):​c.614G>T​(p.Cys205Phe) 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. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 32)
• Consequence: MYO3B NM_138995.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 10.0

Genes affected

MYO3B (HGNC:15576): (myosin IIIB) This gene encodes one of the class III myosins. Myosins are ATPases, activated by actin, that move along actin filaments in the cell. This class of myosins are characterized by an amino-terminal kinase domain and shown to be present in photoreceptors. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Mar 2014]

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.864

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MYO3B	NM_138995.5	c.614G>T	p.Cys205Phe	missense_variant	Exon 7 of 35	ENST00000408978.9	NP_620482.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MYO3B	ENST00000408978.9	c.614G>T	p.Cys205Phe	missense_variant	Exon 7 of 35	1	NM_138995.5	ENSP00000386213.4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.98
BayesDel_addAF	Pathogenic	0.22	D
BayesDel_noAF	Uncertain	0.080
CADD	Pathogenic	33
DANN	Uncertain	0.99
DEOGEN2	Benign	0.034	.;T;T
Eigen	Pathogenic	0.85
Eigen_PC	Pathogenic	0.88
FATHMM_MKL	Uncertain	0.94	D
LIST_S2	Pathogenic	0.98	D;D;D
M_CAP	Uncertain	0.087	D
MetaRNN	Pathogenic	0.86	D;D;D
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	0.94	L;L;.
PrimateAI	Pathogenic	0.88	D
PROVEAN	Pathogenic	-10	D;D;D
REVEL	Uncertain	0.55
Sift	Uncertain	0.0020	D;D;D
Sift4G	Uncertain	0.0070	.;.;D
Polyphen		1.0	D;D;.
Vest4		0.90
MutPred		0.63		Loss of catalytic residue at I203 (P = 0.1231);Loss of catalytic residue at I203 (P = 0.1231);.;
MVP		0.66
MPC		0.53
ClinPred		1.0	D
GERP RS		5.9
Varity_R		0.94
gMVP		0.87

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: rs773287656; hg19: chr2-171092511;