22-25762943-C-T

Variant names:

• chr22-25762943-C-T
• rs2331158
• NM_032608.7:c.40-288C>T

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_032608.7(MYO18B):​c.40-288C>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000235 in 424,984 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts 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: 0.0000024 (0 hom.)
• Consequence: MYO18B NM_032608.7 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.497
• Publications: 0 publications found

Genes affected

MYO18B (HGNC:18150): (myosin XVIIIB) The protein encoded by this gene may regulate muscle-specific genes when in the nucleus and may influence intracellular trafficking when in the cytoplasm. The encoded protein functions as a homodimer and may interact with F actin. Mutations in this gene are associated with lung cancer. [provided by RefSeq, Jul 2008]

MYO18B Gene-Disease associations (from GenCC):

• Klippel-Feil anomaly-myopathy-facial dysmorphism syndrome

  Inheritance: AR Classification: DEFINITIVE, STRONG, MODERATE, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet, Ambry Genetics, ClinGen, G2P

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.82).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MYO18B	NM_032608.7	c.40-288C>T		intron_variant	Intron 2 of 43	ENST00000335473.12	NP_115997.5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MYO18B	ENST00000335473.12	c.40-288C>T		intron_variant	Intron 2 of 43	1	NM_032608.7	ENSP00000334563.8
MYO18B	ENST00000407587.6	c.40-288C>T		intron_variant	Intron 2 of 43	1		ENSP00000386096.2
MYO18B	ENST00000536101.5	c.40-288C>T		intron_variant	Intron 2 of 42	1		ENSP00000441229.1
MYO18B	ENST00000539302.5	n.40-288C>T		intron_variant	Intron 1 of 41	1		ENSP00000437587.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000235 AC: 1 AN: 424984 Hom.: 0 AF XY: 0.00000424 AC XY: 1 AN XY: 235888

African (AFR) AF: 0.00 AC: 0 AN: 12794

American (AMR) AF: 0.00 AC: 0 AN: 37394

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 13978

East Asian (EAS) AF: 0.00 AC: 0 AN: 18514

South Asian (SAS) AF: 0.00 AC: 0 AN: 64934

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 26460

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 3136

European-Non Finnish (NFE) AF: 0.00000441 AC: 1 AN: 226950

Other (OTH) AF: 0.00 AC: 0 AN: 20824

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.82
CADD	Benign	3.7
DANN	Benign	0.70
PhyloP100		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

Other links and lift over

dbSNP: rs2331158; hg19: chr22-26158910;