20-34991096-T-G

Position:

• chr20-34991096-T-G

Variant summary

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

The NM_020884.7(MYH7B):​c.2158T>G​(p.Leu720Val) 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. 13/20 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: MYH7B NM_020884.7 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.09

Genes affected

MYH7B (HGNC:15906): (myosin heavy chain 7B) The myosin II molecule is a multi-subunit complex consisting of two heavy chains and four light chains. This gene encodes a heavy chain of myosin II, which is a member of the motor-domain superfamily. The heavy chain includes a globular motor domain, which catalyzes ATP hydrolysis and interacts with actin, and a tail domain in which heptad repeat sequences promote dimerization by interacting to form a rod-like alpha-helical coiled coil. This heavy chain subunit is a slow-twitch myosin. Alternatively spliced transcript variants have been found, but the full-length nature of these variants is not determined. [provided by RefSeq, Mar 2010]

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=0.15527701).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MYH7B	NM_020884.7	c.2158T>G	p.Leu720Val	missense_variant	24/45	ENST00000262873.13	NP_065935.4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MYH7B	ENST00000262873.13	c.2158T>G	p.Leu720Val	missense_variant	24/45	1	NM_020884.7	ENSP00000262873	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Data not reliable, filtered out with message: AC0;AS_VQSR AF: 0.00 AC: 0 AN: 1460476 Hom.: 0 Cov.: 43 AF XY: 0.00 AC XY: 0 AN XY: 726480

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: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.10
BayesDel_addAF	Benign	-0.071	T
BayesDel_noAF	Benign	-0.34
CADD	Benign	19
DANN	Uncertain	0.98
Eigen	Benign	-0.53
Eigen_PC	Benign	-0.36
FATHMM_MKL	Benign	0.69	D
LIST_S2	Benign	0.84	T;T
M_CAP	Benign	0.018	T
MetaRNN	Benign	0.16	T;T
MetaSVM	Benign	-0.88	T
MutationTaster	Benign	0.51	P
PrimateAI	Uncertain	0.69	T
PROVEAN	Benign	0.12	N;.
REVEL	Benign	0.071
Sift	Benign	0.16	T;.
Sift4G	Benign	0.49	T;T
Vest4		0.15
MVP		0.54
MPC		0.15
ClinPred		0.31	T
GERP RS		3.7
Varity_R		0.060
gMVP		0.50

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: rs2425009; hg19: chr20-33578899;