chr4-165333538-A-G

Variant names:

• chr4-165333538-A-G
• rs772795286
• NM_006745.5:c.168A>G

Variant summary

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

The NM_006745.5(MSMO1):​c.168A>G​(p.Ile56Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000124 in 1,612,966 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 33)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: MSMO1 NM_006745.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.0950
• Publications: 0 publications found

Genes affected

MSMO1 (HGNC:10545): (methylsterol monooxygenase 1) Sterol-C4-mehtyl oxidase-like protein was isolated based on its similarity to the yeast ERG25 protein. It contains a set of putative metal binding motifs with similarity to that seen in a family of membrane desaturases-hydroxylases. The protein is localized to the endoplasmic reticulum membrane and is believed to function in cholesterol biosynthesis. Alternatively spliced transcript variants encoding distinct isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

MSMO1 Gene-Disease associations (from GenCC):

• microcephaly-congenital cataract-psoriasiform dermatitis syndrome

  Inheritance: AR Classification: STRONG, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics

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=0.16359177).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_006745.5. 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
	MSMO1	NM_006745.5	MANE Select	c.168A>G	p.Ile56Met	missense	Exon 2 of 6	NP_006736.1	Q15800-1
	MSMO1	NM_001440534.1		c.168A>G	p.Ile56Met	missense	Exon 2 of 6	NP_001427463.1
	MSMO1	NM_001017369.3		c.-138-4251A>G		intron	N/A	NP_001017369.1	Q15800-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MSMO1	ENST00000261507.11	TSL:1 MANE Select	c.168A>G	p.Ile56Met	missense	Exon 2 of 6	ENSP00000261507.6	Q15800-1
	MSMO1	ENST00000504317.1	TSL:1	c.168A>G	p.Ile56Met	missense	Exon 2 of 5	ENSP00000423633.1	D6R952
	MSMO1	ENST00000906532.1		c.168A>G	p.Ile56Met	missense	Exon 3 of 7	ENSP00000576591.1

Frequencies

GnomAD3 genomes AF: 0.00000657 AC: 1 AN: 152206 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000655

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.00000399 AC: 1 AN: 250664 AF XY: 0.00000738

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000290

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 6.85e-7 AC: 1 AN: 1460760 Hom.: 0 Cov.: 31 AF XY: 0.00000138 AC XY: 1 AN XY: 726620

African (AFR) AF: 0.00 AC: 0 AN: 33440

American (AMR) AF: 0.0000224 AC: 1 AN: 44628

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26104

East Asian (EAS) AF: 0.00 AC: 0 AN: 39592

South Asian (SAS) AF: 0.00 AC: 0 AN: 85976

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53380

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5758

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1111538

Other (OTH) AF: 0.00 AC: 0 AN: 60344

GnomAD4 genome AF: 0.00000657 AC: 1 AN: 152206 Hom.: 0 Cov.: 33 AF XY: 0.00 AC XY: 0 AN XY: 74350

African (AFR) AF: 0.00 AC: 0 AN: 41446

American (AMR) AF: 0.0000655 AC: 1 AN: 15276

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3470

East Asian (EAS) AF: 0.00 AC: 0 AN: 5198

South Asian (SAS) AF: 0.00 AC: 0 AN: 4838

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10622

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 68038

Other (OTH) AF: 0.00 AC: 0 AN: 2090

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000756

ExAC AF: 0.00000824 AC: 1

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	not provided (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.097
BayesDel_addAF	Benign	-0.20	T
BayesDel_noAF	Benign	-0.45
CADD	Benign	15
DANN	Uncertain	0.98
DEOGEN2	Benign	0.31	T
Eigen	Benign	-0.50
Eigen_PC	Benign	-0.45
FATHMM_MKL	Benign	0.49	N
LIST_S2	Benign	0.71	T
M_CAP	Benign	0.0058	T
MetaRNN	Benign	0.16	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Uncertain	2.1	M
PhyloP100		-0.095
PrimateAI	Uncertain	0.56	T
PROVEAN	Benign	-1.4	N
REVEL	Benign	0.091
Sift	Benign	0.032	D
Sift4G	Uncertain	0.036	D
Polyphen		0.44	B
Vest4		0.28
MutPred		0.43		Loss of catalytic residue at I56 (P = 0.0165)
MVP		0.23
MPC		0.31
ClinPred		0.096	T
GERP RS		1.6
Varity_R		0.082
gMVP		0.62
Mutation Taster		=92/8	polymorphism

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: rs772795286; hg19: chr4-166254690;