8-30132787-A-G

Position:

• chr8-30132787-A-G

Variant summary

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

The NM_001100916.2(MBOAT4):​c.464T>C​(p.Leu155Ser) 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. 14/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: MBOAT4 NM_001100916.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.09

Genes affected

MBOAT4 (HGNC:32311): (membrane bound O-acyltransferase domain containing 4) Enables serine O-acyltransferase activity. Involved in peptidyl-serine octanoylation. Predicted to be located in endoplasmic reticulum. Predicted to be active in membrane. Predicted to be integral component of endoplasmic reticulum membrane. [provided by Alliance of Genome Resources, Apr 2022]

LEPROTL1 (HGNC:6555): (leptin receptor overlapping transcript like 1) Enables identical protein binding activity. Predicted to be involved in late endosome to vacuole transport via multivesicular body sorting pathway and negative regulation of growth hormone receptor signaling pathway. Predicted to be integral component of membrane. Predicted to be active in endosome. [provided by Alliance of Genome Resources, Apr 2022]

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=0.19626233).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MBOAT4	NM_001100916.2	c.464T>C	p.Leu155Ser	missense_variant	3/3	ENST00000320542.4	NP_001094386.1
LEPROTL1	NM_001128208.2	c.280-4485A>G		intron_variant			NP_001121680.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MBOAT4	ENST00000320542.4	c.464T>C	p.Leu155Ser	missense_variant	3/3	1	NM_001100916.2	ENSP00000314196.3
LEPROTL1	ENST00000523116.5	c.280-4485A>G		intron_variant		2		ENSP00000428281.1
LEPROTL1	ENST00000442880.6	c.394+298A>G		intron_variant		2		ENSP00000412803.2
LEPROTL1	ENST00000520739.5	n.279+28301A>G		intron_variant		4		ENSP00000429398.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 34

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Feb 28, 2023

The c.464T>C (p.L155S) alteration is located in exon 3 (coding exon 3) of the MBOAT4 gene. This alteration results from a T to C substitution at nucleotide position 464, causing the leucine (L) at amino acid position 155 to be replaced by a serine (S). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.16
BayesDel_addAF	Benign	0.0059	T
BayesDel_noAF	Benign	-0.23
CADD	Benign	14
DANN	Uncertain	1.0
DEOGEN2	Benign	0.060	T
Eigen	Benign	-0.73
Eigen_PC	Benign	-0.78
FATHMM_MKL	Benign	0.043	N
LIST_S2	Benign	0.41	T
M_CAP	Benign	0.049	D
MetaRNN	Benign	0.20	T
MetaSVM	Benign	-0.84	T
MutationAssessor	Uncertain	2.2	M
PrimateAI	Benign	0.30	T
PROVEAN	Benign	-1.3	N
REVEL	Benign	0.19
Sift	Uncertain	0.0030	D
Sift4G	Uncertain	0.042	D
Polyphen		0.051	B
Vest4		0.40
MutPred		0.49		Gain of disorder (P = 0.0107);
MVP		0.65
ClinPred		0.83	D
GERP RS		0.70
Varity_R		0.25
gMVP		0.30

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

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr8-29990303;